/* tc-msp430.c -- Assembler code for the Texas Instruments MSP430
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002-2014 Free Software Foundation, Inc.
Contributed by Dmitry Diky <diwil@mail.ru>
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ the Free Software Foundation, 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
+#include "as.h"
#include <limits.h>
-
#define PUSH_1X_WORKAROUND
-#include "as.h"
#include "subsegs.h"
#include "opcode/msp430.h"
#include "safe-ctype.h"
-
-const char comment_chars[] = ";";
-const char line_comment_chars[] = "#";
-const char line_separator_chars[] = "";
-const char EXP_CHARS[] = "eE";
-const char FLT_CHARS[] = "dD";
-
-/* Handle long expressions. */
-extern LITTLENUM_TYPE generic_bignum[];
-
-static struct hash_control *msp430_hash;
-
-static unsigned int msp430_operands
- PARAMS ((struct msp430_opcode_s *, char *));
-static int msp430_srcoperand
- PARAMS ((struct msp430_operand_s *, char *, int, int *));
-static int msp430_dstoperand
- PARAMS ((struct msp430_operand_s *, char *, int));
-static char *parse_exp
- PARAMS ((char *, expressionS *));
-static inline char *skip_space
- PARAMS ((char *));
-static int check_reg
- PARAMS ((char *));
-static void msp430_set_arch
- PARAMS ((int));
-static void show_mcu_list
- PARAMS ((FILE *));
-static void del_spaces
- PARAMS ((char *));
-
-#define MAX_OP_LEN 256
-
-struct mcu_type_s
+#include "dwarf2dbg.h"
+#include "elf/msp430.h"
+
+/* We will disable polymorphs by default because it is dangerous.
+ The potential problem here is the following: assume we got the
+ following code:
+
+ jump .l1
+ nop
+ jump subroutine ; external symbol
+ .l1:
+ nop
+ ret
+
+ In case of assembly time relaxation we'll get:
+ 0: jmp .l1 <.text +0x08> (reloc deleted)
+ 2: nop
+ 4: br subroutine
+ .l1:
+ 8: nop
+ 10: ret
+
+ If the 'subroutine' is within +-1024 bytes range then linker
+ will produce:
+ 0: jmp .text +0x08
+ 2: nop
+ 4: jmp subroutine
+ .l1:
+ 6: nop
+ 8: ret ; 'jmp .text +0x08' will land here. WRONG!!!
+
+ The workaround is the following:
+ 1. Declare global var enable_polymorphs which set to 1 via option -mp.
+ 2. Declare global var enable_relax which set to 1 via option -mQ.
+
+ If polymorphs are enabled, and relax isn't, treat all jumps as long jumps,
+ do not delete any relocs and leave them for linker.
+
+ If relax is enabled, relax at assembly time and kill relocs as necessary. */
+
+int msp430_enable_relax;
+int msp430_enable_polys;
+
+/* Set linkrelax here to avoid fixups in most sections. */
+int linkrelax = 1;
+
+/* GCC uses the some condition codes which we'll
+ implement as new polymorph instructions.
+
+ COND EXPL SHORT JUMP LONG JUMP
+ ===============================================
+ eq == jeq jne +4; br lab
+ ne != jne jeq +4; br lab
+
+ ltn honours no-overflow flag
+ ltn < jn jn +2; jmp +4; br lab
+
+ lt < jl jge +4; br lab
+ ltu < jlo lhs +4; br lab
+ le <= see below
+ leu <= see below
+
+ gt > see below
+ gtu > see below
+ ge >= jge jl +4; br lab
+ geu >= jhs jlo +4; br lab
+ ===============================================
+
+ Therefore, new opcodes are (BranchEQ -> beq; and so on...)
+ beq,bne,blt,bltn,bltu,bge,bgeu
+ 'u' means unsigned compares
+
+ Also, we add 'jump' instruction:
+ jump UNCOND -> jmp br lab
+
+ They will have fmt == 4, and insn_opnumb == number of instruction. */
+
+struct rcodes_s
{
- char *name;
- int isa;
- int mach;
+ char * name;
+ int index; /* Corresponding insn_opnumb. */
+ int sop; /* Opcode if jump length is short. */
+ long lpos; /* Label position. */
+ long lop0; /* Opcode 1 _word_ (16 bits). */
+ long lop1; /* Opcode second word. */
+ long lop2; /* Opcode third word. */
};
-#define MSP430_ISA_11 11
-#define MSP430_ISA_110 110
-#define MSP430_ISA_12 12
-#define MSP430_ISA_13 13
-#define MSP430_ISA_14 14
-#define MSP430_ISA_15 15
-#define MSP430_ISA_16 16
-#define MSP430_ISA_31 31
-#define MSP430_ISA_32 32
-#define MSP430_ISA_33 33
-#define MSP430_ISA_41 41
-#define MSP430_ISA_42 42
-#define MSP430_ISA_43 43
-#define MSP430_ISA_44 44
-
-#define CHECK_RELOC_MSP430 ((imm_op || byte_op)?BFD_RELOC_MSP430_16_BYTE:BFD_RELOC_MSP430_16)
-#define CHECK_RELOC_MSP430_PCREL ((imm_op || byte_op)?BFD_RELOC_MSP430_16_PCREL_BYTE:BFD_RELOC_MSP430_16_PCREL)
-
-static struct mcu_type_s mcu_types[] =
+#define MSP430_RLC(n,i,sop,o1) \
+ {#n, i, sop, 2, (o1 + 2), 0x4010, 0}
+
+static struct rcodes_s msp430_rcodes[] =
{
- {"msp1", MSP430_ISA_11, bfd_mach_msp11},
- {"msp2", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x110", MSP430_ISA_11, bfd_mach_msp11},
- {"msp430x112", MSP430_ISA_11, bfd_mach_msp11},
- {"msp430x1101",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1111",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1121",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1122",MSP430_ISA_11, bfd_mach_msp110},
- {"msp430x1132",MSP430_ISA_11, bfd_mach_msp110},
-
- {"msp430x122", MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x123", MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x1222",MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x1232",MSP430_ISA_12, bfd_mach_msp12},
-
- {"msp430x133", MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x135", MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x1331",MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x1351",MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x147", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x148", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x149", MSP430_ISA_14, bfd_mach_msp14},
-
- {"msp430x155", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x156", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x157", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x167", MSP430_ISA_16, bfd_mach_msp16},
- {"msp430x168", MSP430_ISA_16, bfd_mach_msp16},
- {"msp430x169", MSP430_ISA_16, bfd_mach_msp16},
-
- {"msp430x311", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x312", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x313", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x314", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x315", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x323", MSP430_ISA_32, bfd_mach_msp32},
- {"msp430x325", MSP430_ISA_32, bfd_mach_msp32},
- {"msp430x336", MSP430_ISA_33, bfd_mach_msp33},
- {"msp430x337", MSP430_ISA_33, bfd_mach_msp33},
-
- {"msp430x412", MSP430_ISA_41, bfd_mach_msp41},
- {"msp430x413", MSP430_ISA_41, bfd_mach_msp41},
-
- {"msp430xE423", MSP430_ISA_42, bfd_mach_msp42},
- {"msp430xE425", MSP430_ISA_42, bfd_mach_msp42},
- {"msp430xE427", MSP430_ISA_42, bfd_mach_msp42},
- {"msp430xW423", MSP430_ISA_42, bfd_mach_msp42},
- {"msp430xW425", MSP430_ISA_42, bfd_mach_msp42},
- {"msp430xW427", MSP430_ISA_42, bfd_mach_msp42},
-
- {"msp430x435", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x436", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x437", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x447", MSP430_ISA_44, bfd_mach_msp44},
- {"msp430x448", MSP430_ISA_44, bfd_mach_msp44},
- {"msp430x449", MSP430_ISA_44, bfd_mach_msp44},
-
- {NULL, 0, 0}
+ MSP430_RLC (beq, 0, 0x2400, 0x2000),
+ MSP430_RLC (bne, 1, 0x2000, 0x2400),
+ MSP430_RLC (blt, 2, 0x3800, 0x3400),
+ MSP430_RLC (bltu, 3, 0x2800, 0x2c00),
+ MSP430_RLC (bge, 4, 0x3400, 0x3800),
+ MSP430_RLC (bgeu, 5, 0x2c00, 0x2800),
+ {"bltn", 6, 0x3000, 3, 0x3000 + 1, 0x3c00 + 2,0x4010},
+ {"jump", 7, 0x3c00, 1, 0x4010, 0, 0},
+ {0,0,0,0,0,0,0}
};
+#undef MSP430_RLC
+#define MSP430_RLC(n,i,sop,o1) \
+ {#n, i, sop, 2, (o1 + 2), 0x0030, 0}
-static struct mcu_type_s default_mcu =
- { "msp430x11", MSP430_ISA_11, bfd_mach_msp11 };
-
-static struct mcu_type_s *msp430_mcu = &default_mcu;
-
-const pseudo_typeS md_pseudo_table[] =
+static struct rcodes_s msp430x_rcodes[] =
{
- {"arch", msp430_set_arch, 0},
- {NULL, NULL, 0}
+ MSP430_RLC (beq, 0, 0x2400, 0x2000),
+ MSP430_RLC (bne, 1, 0x2000, 0x2400),
+ MSP430_RLC (blt, 2, 0x3800, 0x3400),
+ MSP430_RLC (bltu, 3, 0x2800, 0x2c00),
+ MSP430_RLC (bge, 4, 0x3400, 0x3800),
+ MSP430_RLC (bgeu, 5, 0x2c00, 0x2800),
+ {"bltn", 6, 0x3000, 3, 0x0030 + 1, 0x3c00 + 2, 0x3000},
+ {"jump", 7, 0x3c00, 1, 0x0030, 0, 0},
+ {0,0,0,0,0,0,0}
};
+#undef MSP430_RLC
-#define OPTION_MMCU 'm'
+/* More difficult than above and they have format 5.
-const char *md_shortopts = "m:";
+ COND EXPL SHORT LONG
+ =================================================================
+ gt > jeq +2; jge label jeq +6; jl +4; br label
+ gtu > jeq +2; jhs label jeq +6; jlo +4; br label
+ leu <= jeq label; jlo label jeq +2; jhs +4; br label
+ le <= jeq label; jl label jeq +2; jge +4; br label
+ ================================================================= */
-struct option md_longopts[] =
+struct hcodes_s
{
- {"mmcu", required_argument, NULL, OPTION_MMCU},
- {NULL, no_argument, NULL, 0}
+ char * name;
+ int index; /* Corresponding insn_opnumb. */
+ int tlab; /* Number of labels in short mode. */
+ int op0; /* Opcode for first word of short jump. */
+ int op1; /* Opcode for second word of short jump. */
+ int lop0; /* Opcodes for long jump mode. */
+ int lop1;
+ int lop2;
};
-size_t md_longopts_size = sizeof (md_longopts);
+static struct hcodes_s msp430_hcodes[] =
+{
+ {"bgt", 0, 1, 0x2401, 0x3400, 0x2403, 0x3802, 0x4010 },
+ {"bgtu", 1, 1, 0x2401, 0x2c00, 0x2403, 0x2802, 0x4010 },
+ {"bleu", 2, 2, 0x2400, 0x2800, 0x2401, 0x2c02, 0x4010 },
+ {"ble", 3, 2, 0x2400, 0x3800, 0x2401, 0x3402, 0x4010 },
+ {0,0,0,0,0,0,0,0}
+};
-static void
-show_mcu_list (stream)
- FILE *stream;
+static struct hcodes_s msp430x_hcodes[] =
{
- int i;
+ {"bgt", 0, 1, 0x2401, 0x3400, 0x2403, 0x3802, 0x0030 },
+ {"bgtu", 1, 1, 0x2401, 0x2c00, 0x2403, 0x2802, 0x0030 },
+ {"bleu", 2, 2, 0x2400, 0x2800, 0x2401, 0x2c02, 0x0030 },
+ {"ble", 3, 2, 0x2400, 0x3800, 0x2401, 0x3402, 0x0030 },
+ {0,0,0,0,0,0,0,0}
+};
- fprintf (stream, _("Known MCU names:\n"));
+const char comment_chars[] = ";";
+const char line_comment_chars[] = "#";
+const char line_separator_chars[] = "{";
+const char EXP_CHARS[] = "eE";
+const char FLT_CHARS[] = "dD";
- for (i = 0; mcu_types[i].name; i++)
- fprintf (stream, _("\t %s\n"), mcu_types[i].name);
+/* Handle long expressions. */
+extern LITTLENUM_TYPE generic_bignum[];
- fprintf (stream, "\n");
-}
+static struct hash_control *msp430_hash;
-void
-md_show_usage (stream)
- FILE *stream;
+/* Relaxations. */
+#define STATE_UNCOND_BRANCH 1 /* jump */
+#define STATE_NOOV_BRANCH 3 /* bltn */
+#define STATE_SIMPLE_BRANCH 2 /* bne, beq, etc... */
+#define STATE_EMUL_BRANCH 4
+
+#define CNRL 2
+#define CUBL 4
+#define CNOL 8
+#define CSBL 6
+#define CEBL 4
+
+/* Length. */
+#define STATE_BITS10 1 /* wild guess. short jump */
+#define STATE_WORD 2 /* 2 bytes pc rel. addr. more */
+#define STATE_UNDEF 3 /* cannot handle this yet. convert to word mode */
+
+#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
+#define RELAX_STATE(s) ((s) & 3)
+#define RELAX_LEN(s) ((s) >> 2)
+#define RELAX_NEXT(a,b) ENCODE_RELAX (a, b + 1)
+
+relax_typeS md_relax_table[] =
{
- fprintf (stream,
- _("MSP430 options:\n"
- " -mmcu=[msp430-name] select microcontroller type\n"
- " msp430x110 msp430x112\n"
- " msp430x1101 msp430x1111\n"
- " msp430x1121 msp430x1122 msp430x1132\n"
- " msp430x122 msp430x123\n"
- " msp430x1222 msp430x1232\n"
- " msp430x133 msp430x135\n"
- " msp430x1331 msp430x1351\n"
- " msp430x147 msp430x148 msp430x149\n"
- " msp430x155 msp430x156 msp430x157\n"
- " msp430x167 msp430x168 msp430x169\n"
- " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n"
- " msp430x323 msp430x325\n"
- " msp430x336 msp430x337\n"
- " msp430x412 msp430x413\n"
- " msp430xE423 msp430xE425 msp430E427\n"
- " msp430xW423 msp430xW425 msp430W427\n"
- " msp430x435 msp430x436 msp430x437\n"
- " msp430x447 msp430x448 msp430x449\n"));
-
- show_mcu_list (stream);
-}
+ /* Unused. */
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+
+ /* Unconditional jump. */
+ {1, 1, 8, 5},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CUBL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CUBL, 0}, /* state undef */
+
+ /* Simple branches. */
+ {0, 0, 8, 9},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CSBL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CSBL, 0},
+
+ /* blt no overflow branch. */
+ {1, 1, 8, 13},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CNOL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CNOL, 0},
+
+ /* Emulated branches. */
+ {1, 1, 8, 17},
+ {1020, -1020, CEBL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CNOL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CNOL, 0}
+};
-static char *
-extract_word (char *from, char *to, int limit)
-{
- char *op_start;
- char *op_end;
- int size = 0;
- /* Drop leading whitespace. */
- from = skip_space (from);
- *to = 0;
+#define MAX_OP_LEN 256
- /* Find the op code end. */
- for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
- {
- to[size++] = *op_end++;
- if (size + 1 >= limit)
- break;
- }
+typedef enum msp_isa
+{
+ MSP_ISA_430,
+ MSP_ISA_430X,
+ MSP_ISA_430Xv2
+} msp_isa;
- to[size] = 0;
- return op_end;
-}
+static enum msp_isa selected_isa = MSP_ISA_430Xv2;
-static void
-msp430_set_arch (dummy)
- int dummy ATTRIBUTE_UNUSED;
+static inline bfd_boolean
+target_is_430x (void)
{
- char *str = (char *) alloca (32); /* 32 for good measure. */
-
- input_line_pointer = extract_word (input_line_pointer, str, 32);
+ return selected_isa >= MSP_ISA_430X;
+}
- md_parse_option (OPTION_MMCU, str);
- bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
+static inline bfd_boolean
+target_is_430xv2 (void)
+{
+ return selected_isa == MSP_ISA_430Xv2;
}
-int
-md_parse_option (c, arg)
- int c;
- char *arg;
+/* Generate an absolute 16-bit relocation.
+ For the 430X we generate a relocation without linker range checking
+ if the value is being used in an extended (ie 20-bit) instruction,
+ otherwise if have a shifted expression we use a HI reloc.
+ For the 430 we generate a relocation without assembler range checking
+ if we are handling an immediate value or a byte-width instruction. */
+
+#undef CHECK_RELOC_MSP430
+#define CHECK_RELOC_MSP430(OP) \
+ (target_is_430x () \
+ ? (extended_op \
+ ? BFD_RELOC_16 \
+ : ((OP).vshift == 1) \
+ ? BFD_RELOC_MSP430_ABS_HI16 \
+ : BFD_RELOC_MSP430X_ABS16) \
+ : ((imm_op || byte_op) \
+ ? BFD_RELOC_MSP430_16_BYTE : BFD_RELOC_MSP430_16))
+
+/* Generate a 16-bit pc-relative relocation.
+ For the 430X we generate a relocation without linkwer range checking.
+ For the 430 we generate a relocation without assembler range checking
+ if we are handling an immediate value or a byte-width instruction. */
+#undef CHECK_RELOC_MSP430_PCREL
+#define CHECK_RELOC_MSP430_PCREL \
+ (target_is_430x () \
+ ? BFD_RELOC_MSP430X_PCR16 \
+ : (imm_op || byte_op) \
+ ? BFD_RELOC_MSP430_16_PCREL_BYTE : BFD_RELOC_MSP430_16_PCREL)
+
+/* Profiling capability:
+ It is a performance hit to use gcc's profiling approach for this tiny target.
+ Even more -- jtag hardware facility does not perform any profiling functions.
+ However we've got gdb's built-in simulator where we can do anything.
+ Therefore my suggestion is:
+
+ We define new section ".profiler" which holds all profiling information.
+ We define new pseudo operation .profiler which will instruct assembler to
+ add new profile entry to the object file. Profile should take place at the
+ present address.
+
+ Pseudo-op format:
+
+ .profiler flags,function_to_profile [, cycle_corrector, extra]
+
+ where 'flags' is a combination of the following chars:
+ s - function Start
+ x - function eXit
+ i - function is in Init section
+ f - function is in Fini section
+ l - Library call
+ c - libC standard call
+ d - stack value Demand (saved at run-time in simulator)
+ I - Interrupt service routine
+ P - Prologue start
+ p - Prologue end
+ E - Epilogue start
+ e - Epilogue end
+ j - long Jump/ sjlj unwind
+ a - an Arbitrary code fragment
+ t - exTra parameter saved (constant value like frame size)
+ '""' optional: "sil" == sil
+
+ function_to_profile - function's address
+ cycle_corrector - a value which should be added to the cycle
+ counter, zero if omitted
+ extra - some extra parameter, zero if omitted.
+
+ For example:
+ ------------------------------
+ .global fxx
+ .type fxx,@function
+ fxx:
+ .LFrameOffset_fxx=0x08
+ .profiler "scdP", fxx ; function entry.
+ ; we also demand stack value to be displayed
+ push r11
+ push r10
+ push r9
+ push r8
+ .profiler "cdp",fxx,0, .LFrameOffset_fxx ; check stack value at this point
+ ; (this is a prologue end)
+ ; note, that spare var filled with the frame size
+ mov r15,r8
+ ....
+ .profiler cdE,fxx ; check stack
+ pop r8
+ pop r9
+ pop r10
+ pop r11
+ .profiler xcde,fxx,3 ; exit adds 3 to the cycle counter
+ ret ; cause 'ret' insn takes 3 cycles
+ -------------------------------
+
+ This profiling approach does not produce any overhead and
+ absolutely harmless.
+ So, even profiled code can be uploaded to the MCU. */
+#define MSP430_PROFILER_FLAG_ENTRY 1 /* s */
+#define MSP430_PROFILER_FLAG_EXIT 2 /* x */
+#define MSP430_PROFILER_FLAG_INITSECT 4 /* i */
+#define MSP430_PROFILER_FLAG_FINISECT 8 /* f */
+#define MSP430_PROFILER_FLAG_LIBCALL 0x10 /* l */
+#define MSP430_PROFILER_FLAG_STDCALL 0x20 /* c */
+#define MSP430_PROFILER_FLAG_STACKDMD 0x40 /* d */
+#define MSP430_PROFILER_FLAG_ISR 0x80 /* I */
+#define MSP430_PROFILER_FLAG_PROLSTART 0x100 /* P */
+#define MSP430_PROFILER_FLAG_PROLEND 0x200 /* p */
+#define MSP430_PROFILER_FLAG_EPISTART 0x400 /* E */
+#define MSP430_PROFILER_FLAG_EPIEND 0x800 /* e */
+#define MSP430_PROFILER_FLAG_JUMP 0x1000 /* j */
+#define MSP430_PROFILER_FLAG_FRAGMENT 0x2000 /* a */
+#define MSP430_PROFILER_FLAG_EXTRA 0x4000 /* t */
+#define MSP430_PROFILER_FLAG_notyet 0x8000 /* ? */
+
+static int
+pow2value (int y)
{
- int i;
+ int n = 0;
+ unsigned int x;
- switch (c)
- {
- case OPTION_MMCU:
- for (i = 0; mcu_types[i].name; ++i)
- if (strcmp (mcu_types[i].name, arg) == 0)
- break;
+ x = y;
- if (!mcu_types[i].name)
- {
- show_mcu_list (stderr);
- as_fatal (_("unknown MCU: %s\n"), arg);
- }
+ if (!x)
+ return 1;
- if (msp430_mcu == &default_mcu || msp430_mcu->mach == mcu_types[i].mach)
- msp430_mcu = &mcu_types[i];
- else
- as_fatal (_("redefinition of mcu type %s' to %s'"),
- msp430_mcu->name, mcu_types[i].name);
- return 1;
- }
+ for (; x; x = x >> 1)
+ if (x & 1)
+ n++;
- return 0;
+ return n == 1;
}
-symbolS *
-md_undefined_symbol (name)
- char *name ATTRIBUTE_UNUSED;
-{
- return 0;
-}
+/* Parse ordinary expression. */
-static inline char *
-skip_space (s)
- char *s;
+static char *
+parse_exp (char * s, expressionS * op)
{
- while (ISSPACE (*s))
- ++s;
- return s;
+ input_line_pointer = s;
+ expression (op);
+ if (op->X_op == O_absent)
+ as_bad (_("missing operand"));
+ return input_line_pointer;
}
+
/* Delete spaces from s: X ( r 1 2) => X(r12). */
static void
-del_spaces (s)
- char *s;
+del_spaces (char * s)
{
while (*s)
{
}
}
-/* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */
+static inline char *
+skip_space (char * s)
+{
+ while (ISSPACE (*s))
+ ++s;
+ return s;
+}
+
+/* Extract one word from FROM and copy it to TO. Delimiters are ",;\n" */
static char *
-extract_operand (char *from, char *to, int limit)
+extract_operand (char * from, char * to, int limit)
{
int size = 0;
return from;
}
-static char *
-extract_cmd (char *from, char *to, int limit)
+static void
+msp430_profiler (int dummy ATTRIBUTE_UNUSED)
{
- int size = 0;
-
- while (*from && ! ISSPACE (*from) && *from != '.' && limit > size)
+ char buffer[1024];
+ char f[32];
+ char * str = buffer;
+ char * flags = f;
+ int p_flags = 0;
+ char * halt;
+ int ops = 0;
+ int left;
+ char * s;
+ segT seg;
+ int subseg;
+ char * end = 0;
+ expressionS exp;
+ expressionS exp1;
+
+ s = input_line_pointer;
+ end = input_line_pointer;
+
+ while (*end && *end != '\n')
+ end++;
+
+ while (*s && *s != '\n')
{
- *(to + size) = *from;
- from++;
- size++;
+ if (*s == ',')
+ ops++;
+ s++;
}
- *(to + size) = 0;
+ left = 3 - ops;
- return from;
-}
+ if (ops < 1)
+ {
+ as_bad (_(".profiler pseudo requires at least two operands."));
+ input_line_pointer = end;
+ return;
+ }
-/* Turn a string in input_line_pointer into a floating point constant
- of type TYPE, and store the appropriate bytes in *LITP. The number
- of LITTLENUMS emitted is stored in *SIZEP. An error message is
- returned, or NULL on OK. */
+ input_line_pointer = extract_operand (input_line_pointer, flags, 32);
-char *
-md_atof (type, litP, sizeP)
- int type;
- char *litP;
- int *sizeP;
-{
- int prec;
- LITTLENUM_TYPE words[4];
- LITTLENUM_TYPE *wordP;
- char *t;
+ while (*flags)
+ {
+ switch (*flags)
+ {
+ case '"':
+ break;
+ case 'a':
+ p_flags |= MSP430_PROFILER_FLAG_FRAGMENT;
+ break;
+ case 'j':
+ p_flags |= MSP430_PROFILER_FLAG_JUMP;
+ break;
+ case 'P':
+ p_flags |= MSP430_PROFILER_FLAG_PROLSTART;
+ break;
+ case 'p':
+ p_flags |= MSP430_PROFILER_FLAG_PROLEND;
+ break;
+ case 'E':
+ p_flags |= MSP430_PROFILER_FLAG_EPISTART;
+ break;
+ case 'e':
+ p_flags |= MSP430_PROFILER_FLAG_EPIEND;
+ break;
+ case 's':
+ p_flags |= MSP430_PROFILER_FLAG_ENTRY;
+ break;
+ case 'x':
+ p_flags |= MSP430_PROFILER_FLAG_EXIT;
+ break;
+ case 'i':
+ p_flags |= MSP430_PROFILER_FLAG_INITSECT;
+ break;
+ case 'f':
+ p_flags |= MSP430_PROFILER_FLAG_FINISECT;
+ break;
+ case 'l':
+ p_flags |= MSP430_PROFILER_FLAG_LIBCALL;
+ break;
+ case 'c':
+ p_flags |= MSP430_PROFILER_FLAG_STDCALL;
+ break;
+ case 'd':
+ p_flags |= MSP430_PROFILER_FLAG_STACKDMD;
+ break;
+ case 'I':
+ p_flags |= MSP430_PROFILER_FLAG_ISR;
+ break;
+ case 't':
+ p_flags |= MSP430_PROFILER_FLAG_EXTRA;
+ break;
+ default:
+ as_warn (_("unknown profiling flag - ignored."));
+ break;
+ }
+ flags++;
+ }
- switch (type)
+ if (p_flags
+ && ( ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_ENTRY
+ | MSP430_PROFILER_FLAG_EXIT))
+ || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_PROLSTART
+ | MSP430_PROFILER_FLAG_PROLEND
+ | MSP430_PROFILER_FLAG_EPISTART
+ | MSP430_PROFILER_FLAG_EPIEND))
+ || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_INITSECT
+ | MSP430_PROFILER_FLAG_FINISECT))))
{
- case 'f':
- prec = 2;
- break;
- case 'd':
- prec = 4;
- break;
- default:
- *sizeP = 0;
- return _("bad call to md_atof");
+ as_bad (_("ambiguous flags combination - '.profiler' directive ignored."));
+ input_line_pointer = end;
+ return;
+ }
+
+ /* Generate temp symbol which denotes current location. */
+ if (now_seg == absolute_section) /* Paranoia ? */
+ {
+ exp1.X_op = O_constant;
+ exp1.X_add_number = abs_section_offset;
+ as_warn (_("profiling in absolute section?"));
}
+ else
+ {
+ exp1.X_op = O_symbol;
+ exp1.X_add_symbol = symbol_temp_new_now ();
+ exp1.X_add_number = 0;
+ }
+
+ /* Generate a symbol which holds flags value. */
+ exp.X_op = O_constant;
+ exp.X_add_number = p_flags;
- t = atof_ieee (input_line_pointer, type, words);
- if (t)
- input_line_pointer = t;
+ /* Save current section. */
+ seg = now_seg;
+ subseg = now_subseg;
- *sizeP = prec * sizeof (LITTLENUM_TYPE);
+ /* Now go to .profiler section. */
+ obj_elf_change_section (".profiler", SHT_PROGBITS, 0, 0, 0, 0, 0);
- /* This loop outputs the LITTLENUMs in REVERSE order. */
- for (wordP = words + prec - 1; prec--;)
+ /* Save flags. */
+ emit_expr (& exp, 2);
+
+ /* Save label value. */
+ emit_expr (& exp1, 2);
+
+ while (ops--)
{
- md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
+ /* Now get profiling info. */
+ halt = extract_operand (input_line_pointer, str, 1024);
+ /* Process like ".word xxx" directive. */
+ parse_exp (str, & exp);
+ emit_expr (& exp, 2);
+ input_line_pointer = halt;
}
- return NULL;
+ /* Fill the rest with zeros. */
+ exp.X_op = O_constant;
+ exp.X_add_number = 0;
+ while (left--)
+ emit_expr (& exp, 2);
+
+ /* Return to current section. */
+ subseg_set (seg, subseg);
}
-void
-md_convert_frag (abfd, sec, fragP)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- fragS *fragP ATTRIBUTE_UNUSED;
+static char *
+extract_word (char * from, char * to, int limit)
{
- abort ();
+ char *op_end;
+ int size = 0;
+
+ /* Drop leading whitespace. */
+ from = skip_space (from);
+ *to = 0;
+
+ /* Find the op code end. */
+ for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
+ {
+ to[size++] = *op_end++;
+ if (size + 1 >= limit)
+ break;
+ }
+
+ to[size] = 0;
+ return op_end;
}
-void
-md_begin ()
+#define OPTION_MMCU 'm'
+#define OPTION_RELAX 'Q'
+#define OPTION_POLYMORPHS 'P'
+#define OPTION_LARGE 'l'
+static bfd_boolean large_model = FALSE;
+#define OPTION_NO_INTR_NOPS 'N'
+#define OPTION_INTR_NOPS 'n'
+static bfd_boolean gen_interrupt_nops = FALSE;
+#define OPTION_WARN_INTR_NOPS 'y'
+#define OPTION_NO_WARN_INTR_NOPS 'Y'
+static bfd_boolean warn_interrupt_nops = TRUE;
+#define OPTION_MCPU 'c'
+#define OPTION_MOVE_DATA 'd'
+static bfd_boolean move_data = FALSE;
+
+static void
+msp430_set_arch (int option)
{
- struct msp430_opcode_s *opcode;
- msp430_hash = hash_new ();
+ char *str = (char *) alloca (32); /* 32 for good measure. */
- for (opcode = msp430_opcodes; opcode->name; opcode++)
- hash_insert (msp430_hash, opcode->name, (char *) opcode);
+ input_line_pointer = extract_word (input_line_pointer, str, 32);
- bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
+ md_parse_option (option, str);
+ bfd_set_arch_mach (stdoutput, TARGET_ARCH,
+ target_is_430x () ? bfd_mach_msp430x : bfd_mach_msp11);
}
-void
-md_assemble (str)
- char *str;
+/* This is the full list of MCU names that are known to only
+ support the 430 ISA. */
+static const char * msp430_mcu_names [] =
{
- struct msp430_opcode_s *opcode;
- char cmd[32];
- unsigned int i = 0;
-
- str = skip_space (str); /* Skip leading spaces. */
- str = extract_cmd (str, cmd, sizeof (cmd));
+"msp430afe221", "msp430afe222", "msp430afe223", "msp430afe231",
+"msp430afe232", "msp430afe233", "msp430afe251", "msp430afe252",
+"msp430afe253", "msp430c091", "msp430c092", "msp430c111",
+"msp430c1111", "msp430c112", "msp430c1121", "msp430c1331",
+"msp430c1351", "msp430c311s", "msp430c312", "msp430c313",
+"msp430c314", "msp430c315", "msp430c323", "msp430c325",
+"msp430c336", "msp430c337", "msp430c412", "msp430c413",
+"msp430e112", "msp430e313", "msp430e315", "msp430e325",
+"msp430e337", "msp430f110", "msp430f1101", "msp430f1101a",
+"msp430f1111", "msp430f1111a", "msp430f112", "msp430f1121",
+"msp430f1121a", "msp430f1122", "msp430f1132", "msp430f122",
+"msp430f1222", "msp430f123", "msp430f1232", "msp430f133",
+"msp430f135", "msp430f147", "msp430f1471", "msp430f148",
+"msp430f1481", "msp430f149", "msp430f1491", "msp430f155",
+"msp430f156", "msp430f157", "msp430f1610", "msp430f1611",
+"msp430f1612", "msp430f167", "msp430f168", "msp430f169",
+"msp430f2001", "msp430f2002", "msp430f2003", "msp430f2011",
+"msp430f2012", "msp430f2013", "msp430f2101", "msp430f2111",
+"msp430f2112", "msp430f2121", "msp430f2122", "msp430f2131",
+"msp430f2132", "msp430f2232", "msp430f2234", "msp430f2252",
+"msp430f2254", "msp430f2272", "msp430f2274", "msp430f233",
+"msp430f2330", "msp430f235", "msp430f2350", "msp430f2370",
+"msp430f2410", "msp430f247", "msp430f2471", "msp430f248",
+"msp430f2481", "msp430f249", "msp430f2491", "msp430f412",
+"msp430f413", "msp430f4132", "msp430f415", "msp430f4152",
+"msp430f417", "msp430f423", "msp430f423a", "msp430f425",
+"msp430f4250", "msp430f425a", "msp430f4260", "msp430f427",
+"msp430f4270", "msp430f427a", "msp430f435", "msp430f4351",
+"msp430f436", "msp430f4361", "msp430f437", "msp430f4371",
+"msp430f438", "msp430f439", "msp430f447", "msp430f448",
+"msp430f4481", "msp430f449", "msp430f4491", "msp430f477",
+"msp430f478", "msp430f4783", "msp430f4784", "msp430f479",
+"msp430f4793", "msp430f4794", "msp430fe423", "msp430fe4232",
+"msp430fe423a", "msp430fe4242", "msp430fe425", "msp430fe4252",
+"msp430fe425a", "msp430fe427", "msp430fe4272", "msp430fe427a",
+"msp430fg4250", "msp430fg4260", "msp430fg4270", "msp430fg437",
+"msp430fg438", "msp430fg439", "msp430fg477", "msp430fg478",
+"msp430fg479", "msp430fw423", "msp430fw425", "msp430fw427",
+"msp430fw428", "msp430fw429", "msp430g2001", "msp430g2101",
+"msp430g2102", "msp430g2111", "msp430g2112", "msp430g2113",
+"msp430g2121", "msp430g2131", "msp430g2132", "msp430g2152",
+"msp430g2153", "msp430g2201", "msp430g2202", "msp430g2203",
+"msp430g2210", "msp430g2211", "msp430g2212", "msp430g2213",
+"msp430g2221", "msp430g2230", "msp430g2231", "msp430g2232",
+"msp430g2233", "msp430g2252", "msp430g2253", "msp430g2302",
+"msp430g2303", "msp430g2312", "msp430g2313", "msp430g2332",
+"msp430g2333", "msp430g2352", "msp430g2353", "msp430g2402",
+"msp430g2403", "msp430g2412", "msp430g2413", "msp430g2432",
+"msp430g2433", "msp430g2444", "msp430g2452", "msp430g2453",
+"msp430g2513", "msp430g2533", "msp430g2544", "msp430g2553",
+"msp430g2744", "msp430g2755", "msp430g2855", "msp430g2955",
+"msp430i2020", "msp430i2021", "msp430i2030", "msp430i2031",
+"msp430i2040", "msp430i2041", "msp430l092", "msp430p112",
+"msp430p313", "msp430p315", "msp430p315s", "msp430p325",
+"msp430p337", "msp430tch5e"
+};
- while (cmd[i] && i < sizeof (cmd))
+int
+md_parse_option (int c, char * arg)
+{
+ switch (c)
{
- char a = TOLOWER (cmd[i]);
- cmd[i] = a;
- i++;
- }
+ case OPTION_MMCU:
+ if (arg == NULL)
+ as_fatal (_("MCU option requires a name\n"));
+
+ if (strcasecmp ("msp430", arg) == 0)
+ selected_isa = MSP_ISA_430;
+ else if (strcasecmp ("msp430xv2", arg) == 0)
+ selected_isa = MSP_ISA_430Xv2;
+ else if (strcasecmp ("msp430x", arg) == 0)
+ selected_isa = MSP_ISA_430X;
+ else
+ {
+ int i;
- if (!cmd[0])
- {
- as_bad (_("can't find opcode "));
- return;
- }
+ for (i = sizeof msp430_mcu_names / sizeof msp430_mcu_names[0]; i--;)
+ if (strcasecmp (msp430_mcu_names[i], arg) == 0)
+ {
+ selected_isa = MSP_ISA_430;
+ break;
+ }
+ }
+ /* It is not an error if we do not match the MCU name. */
+ return 1;
- opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd);
+ case OPTION_MCPU:
+ if (strcmp (arg, "430") == 0
+ || strcasecmp (arg, "msp430") == 0)
+ selected_isa = MSP_ISA_430;
+ else if (strcasecmp (arg, "430x") == 0
+ || strcasecmp (arg, "msp430x") == 0)
+ selected_isa = MSP_ISA_430X;
+ else if (strcasecmp (arg, "430xv2") == 0
+ || strcasecmp (arg, "msp430xv2") == 0)
+ selected_isa = MSP_ISA_430Xv2;
+ else
+ as_fatal (_("unrecognised argument to -mcpu option '%s'"), arg);
+ return 1;
- if (opcode == NULL)
- {
- as_bad (_("unknown opcode `%s'"), cmd);
- return;
- }
+ case OPTION_RELAX:
+ msp430_enable_relax = 1;
+ return 1;
- {
- char *__t = input_line_pointer;
- msp430_operands (opcode, str);
- input_line_pointer = __t;
- }
-}
+ case OPTION_POLYMORPHS:
+ msp430_enable_polys = 1;
+ return 1;
-/* Parse instruction operands.
- Return binary opcode. */
+ case OPTION_LARGE:
+ large_model = TRUE;
+ return 1;
-static unsigned int
-msp430_operands (opcode, line)
- struct msp430_opcode_s *opcode;
- char *line;
-{
- int bin = opcode->bin_opcode; /* opcode mask. */
- int __is;
- char l1[MAX_OP_LEN], l2[MAX_OP_LEN];
- char *frag;
- int where;
- struct msp430_operand_s op1, op2;
- int res = 0;
- static short ZEROS = 0;
- int byte_op, imm_op;
+ case OPTION_NO_INTR_NOPS:
+ gen_interrupt_nops = FALSE;
+ return 1;
+ case OPTION_INTR_NOPS:
+ gen_interrupt_nops = TRUE;
+ return 1;
- /* opcode is the one from opcodes table
- line contains something like
- [.w] @r2+, 5(R1)
- or
- .b @r2+, 5(R1). */
+ case OPTION_WARN_INTR_NOPS:
+ warn_interrupt_nops = TRUE;
+ return 1;
+ case OPTION_NO_WARN_INTR_NOPS:
+ warn_interrupt_nops = FALSE;
+ return 1;
- /* Check if byte or word operation. */
- if (*line == '.' && TOLOWER (*(line + 1)) == 'b')
- {
- bin |= BYTE_OPERATION;
- byte_op = 1;
+ case OPTION_MOVE_DATA:
+ move_data = TRUE;
+ return 1;
}
- else
- byte_op = 0;
- /* skip .[bwBW]. */
- while (! ISSPACE (*line) && *line)
- line++;
+ return 0;
+}
- if (opcode->insn_opnumb && (!*line || *line == '\n'))
- {
- as_bad (_("instruction %s requires %d operand(s)"),
+/* The intention here is to have the mere presence of these sections
+ cause the object to have a reference to a well-known symbol. This
+ reference pulls in the bits of the runtime (crt0) that initialize
+ these sections. Thus, for example, the startup code to call
+ memset() to initialize .bss will only be linked in when there is a
+ non-empty .bss section. Otherwise, the call would exist but have a
+ zero length parameter, which is a waste of memory and cycles.
+
+ The code which initializes these sections should have a global
+ label for these symbols, and should be marked with KEEP() in the
+ linker script.
+ */
+static void
+msp430_section (int arg)
+{
+ char * saved_ilp = input_line_pointer;
+ char * name = obj_elf_section_name ();
+
+ if (strncmp (name, ".bss", 4) == 0
+ || strncmp (name, ".gnu.linkonce.b.", 16) == 0)
+ (void) symbol_find_or_make ("__crt0_init_bss");
+
+ if (strncmp (name, ".data", 5) == 0
+ || strncmp (name, ".gnu.linkonce.d.", 16) == 0)
+ (void) symbol_find_or_make ("__crt0_movedata");
+
+ input_line_pointer = saved_ilp;
+ obj_elf_section (arg);
+}
+
+void
+msp430_frob_section (asection *sec)
+{
+ const char *name = sec->name;
+
+ if (sec->size == 0)
+ return;
+
+ if (strncmp (name, ".bss", 4) == 0
+ || strncmp (name, ".gnu.linkonce.b.", 16) == 0)
+ (void) symbol_find_or_make ("__crt0_init_bss");
+
+ if (strncmp (name, ".data", 5) == 0
+ || strncmp (name, ".gnu.linkonce.d.", 16) == 0)
+ (void) symbol_find_or_make ("__crt0_movedata");
+}
+
+static void
+msp430_lcomm (int ignore ATTRIBUTE_UNUSED)
+{
+ symbolS *symbolP = s_comm_internal (0, s_lcomm_internal);
+
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
+ (void) symbol_find_or_make ("__crt0_init_bss");
+}
+
+static void
+msp430_comm (int needs_align)
+{
+ s_comm_internal (needs_align, elf_common_parse);
+ (void) symbol_find_or_make ("__crt0_init_bss");
+}
+
+static void
+msp430_refsym (int arg ATTRIBUTE_UNUSED)
+{
+ char sym_name[1024];
+ input_line_pointer = extract_word (input_line_pointer, sym_name, 1024);
+
+ (void) symbol_find_or_make (sym_name);
+}
+
+const pseudo_typeS md_pseudo_table[] =
+{
+ {"arch", msp430_set_arch, OPTION_MMCU},
+ {"cpu", msp430_set_arch, OPTION_MCPU},
+ {"profiler", msp430_profiler, 0},
+ {"section", msp430_section, 0},
+ {"section.s", msp430_section, 0},
+ {"sect", msp430_section, 0},
+ {"sect.s", msp430_section, 0},
+ {"pushsection", msp430_section, 1},
+ {"refsym", msp430_refsym, 0},
+ {"comm", msp430_comm, 0},
+ {"lcomm", msp430_lcomm, 0},
+ {NULL, NULL, 0}
+};
+
+const char *md_shortopts = "mm:,mP,mQ,ml,mN,mn,my,mY";
+
+struct option md_longopts[] =
+{
+ {"mmcu", required_argument, NULL, OPTION_MMCU},
+ {"mcpu", required_argument, NULL, OPTION_MCPU},
+ {"mP", no_argument, NULL, OPTION_POLYMORPHS},
+ {"mQ", no_argument, NULL, OPTION_RELAX},
+ {"ml", no_argument, NULL, OPTION_LARGE},
+ {"mN", no_argument, NULL, OPTION_NO_INTR_NOPS},
+ {"mn", no_argument, NULL, OPTION_INTR_NOPS},
+ {"mY", no_argument, NULL, OPTION_NO_WARN_INTR_NOPS},
+ {"my", no_argument, NULL, OPTION_WARN_INTR_NOPS},
+ {"md", no_argument, NULL, OPTION_MOVE_DATA},
+ {NULL, no_argument, NULL, 0}
+};
+
+size_t md_longopts_size = sizeof (md_longopts);
+
+void
+md_show_usage (FILE * stream)
+{
+ fprintf (stream,
+ _("MSP430 options:\n"
+ " -mmcu=<msp430-name> - select microcontroller type\n"
+ " -mcpu={430|430x|430xv2} - select microcontroller architecture\n"));
+ fprintf (stream,
+ _(" -mQ - enable relaxation at assembly time. DANGEROUS!\n"
+ " -mP - enable polymorph instructions\n"));
+ fprintf (stream,
+ _(" -ml - enable large code model\n"));
+ fprintf (stream,
+ _(" -mN - do not insert NOPs after changing interrupts (default)\n"));
+ fprintf (stream,
+ _(" -mn - insert a NOP after changing interrupts\n"));
+ fprintf (stream,
+ _(" -mY - do not warn about missing NOPs after changing interrupts\n"));
+ fprintf (stream,
+ _(" -my - warn about missing NOPs after changing interrupts (default)\n"));
+ fprintf (stream,
+ _(" -md - Force copying of data from ROM to RAM at startup\n"));
+}
+
+symbolS *
+md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
+{
+ return NULL;
+}
+
+static char *
+extract_cmd (char * from, char * to, int limit)
+{
+ int size = 0;
+
+ while (*from && ! ISSPACE (*from) && *from != '.' && limit > size)
+ {
+ *(to + size) = *from;
+ from++;
+ size++;
+ }
+
+ *(to + size) = 0;
+
+ return from;
+}
+
+char *
+md_atof (int type, char * litP, int * sizeP)
+{
+ return ieee_md_atof (type, litP, sizeP, FALSE);
+}
+
+void
+md_begin (void)
+{
+ struct msp430_opcode_s * opcode;
+ msp430_hash = hash_new ();
+
+ for (opcode = msp430_opcodes; opcode->name; opcode++)
+ hash_insert (msp430_hash, opcode->name, (char *) opcode);
+
+ bfd_set_arch_mach (stdoutput, TARGET_ARCH,
+ target_is_430x () ? bfd_mach_msp430x : bfd_mach_msp11);
+}
+
+/* Returns the register number equivalent to the string T.
+ Returns -1 if there is no such register.
+ Skips a leading 'r' or 'R' character if there is one.
+ Handles the register aliases PC and SP. */
+
+static signed int
+check_reg (char * t)
+{
+ signed int val;
+
+ if (t == NULL)
+ return -1;
+
+ if (*t == 'r' || *t == 'R')
+ ++t;
+
+ if (strncasecmp (t, "pc", 2) == 0)
+ return 0;
+
+ if (strncasecmp (t, "sp", 2) == 0)
+ return 1;
+
+ if (strncasecmp (t, "sr", 2) == 0)
+ return 2;
+
+ if (*t == '0')
+ return 0;
+
+ val = atoi (t);
+
+ if (val < 1 || val > 15)
+ return -1;
+
+ return val;
+}
+
+static int
+msp430_srcoperand (struct msp430_operand_s * op,
+ char * l,
+ int bin,
+ bfd_boolean * imm_op,
+ bfd_boolean allow_20bit_values,
+ bfd_boolean constants_allowed)
+{
+ char *__tl = l;
+
+ /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */
+ if (*l == '#')
+ {
+ char *h = l;
+ int vshift = -1;
+ int rval = 0;
+
+ /* Check if there is:
+ llo(x) - least significant 16 bits, x &= 0xffff
+ lhi(x) - x = (x >> 16) & 0xffff,
+ hlo(x) - x = (x >> 32) & 0xffff,
+ hhi(x) - x = (x >> 48) & 0xffff
+ The value _MUST_ be constant expression: #hlo(1231231231). */
+
+ *imm_op = TRUE;
+
+ if (strncasecmp (h, "#llo(", 5) == 0)
+ {
+ vshift = 0;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#lhi(", 5) == 0)
+ {
+ vshift = 1;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#hlo(", 5) == 0)
+ {
+ vshift = 2;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#hhi(", 5) == 0)
+ {
+ vshift = 3;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#lo(", 4) == 0)
+ {
+ vshift = 0;
+ rval = 2;
+ }
+ else if (strncasecmp (h, "#hi(", 4) == 0)
+ {
+ vshift = 1;
+ rval = 2;
+ }
+
+ op->reg = 0; /* Reg PC. */
+ op->am = 3;
+ op->ol = 1; /* Immediate will follow an instruction. */
+ __tl = h + 1 + rval;
+ op->mode = OP_EXP;
+ op->vshift = vshift;
+
+ parse_exp (__tl, &(op->exp));
+ if (op->exp.X_op == O_constant)
+ {
+ int x = op->exp.X_add_number;
+
+ if (vshift == 0)
+ {
+ x = x & 0xffff;
+ op->exp.X_add_number = x;
+ }
+ else if (vshift == 1)
+ {
+ x = (x >> 16) & 0xffff;
+ op->exp.X_add_number = x;
+ op->vshift = 0;
+ }
+ else if (vshift > 1)
+ {
+ if (x < 0)
+ op->exp.X_add_number = -1;
+ else
+ op->exp.X_add_number = 0; /* Nothing left. */
+ x = op->exp.X_add_number;
+ op->vshift = 0;
+ }
+
+ if (allow_20bit_values)
+ {
+ if (op->exp.X_add_number > 0xfffff || op->exp.X_add_number < -524288)
+ {
+ as_bad (_("value 0x%x out of extended range."), x);
+ return 1;
+ }
+ }
+ else if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768)
+ {
+ as_bad (_("value %d out of range. Use #lo() or #hi()"), x);
+ return 1;
+ }
+
+ /* Now check constants. */
+ /* Substitute register mode with a constant generator if applicable. */
+
+ if (!allow_20bit_values)
+ x = (short) x; /* Extend sign. */
+
+ if (! constants_allowed)
+ ;
+ else if (x == 0)
+ {
+ op->reg = 3;
+ op->am = 0;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 1)
+ {
+ op->reg = 3;
+ op->am = 1;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 2)
+ {
+ op->reg = 3;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == -1)
+ {
+ op->reg = 3;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 4)
+ {
+#ifdef PUSH_1X_WORKAROUND
+ if (bin == 0x1200)
+ {
+ /* Remove warning as confusing.
+ as_warn (_("Hardware push bug workaround")); */
+ }
+ else
+#endif
+ {
+ op->reg = 2;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ }
+ else if (x == 8)
+ {
+#ifdef PUSH_1X_WORKAROUND
+ if (bin == 0x1200)
+ {
+ /* Remove warning as confusing.
+ as_warn (_("Hardware push bug workaround")); */
+ }
+ else
+#endif
+ {
+ op->reg = 2;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ }
+ }
+ else if (op->exp.X_op == O_symbol)
+ {
+ if (vshift > 1)
+ as_bad (_("error: unsupported #foo() directive used on symbol"));
+ op->mode = OP_EXP;
+ }
+ else if (op->exp.X_op == O_big)
+ {
+ short x;
+
+ if (vshift != -1)
+ {
+ op->exp.X_op = O_constant;
+ op->exp.X_add_number = 0xffff & generic_bignum[vshift];
+ x = op->exp.X_add_number;
+ op->vshift = 0;
+ }
+ else
+ {
+ as_bad (_
+ ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "),
+ l);
+ return 1;
+ }
+
+ if (x == 0)
+ {
+ op->reg = 3;
+ op->am = 0;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 1)
+ {
+ op->reg = 3;
+ op->am = 1;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 2)
+ {
+ op->reg = 3;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == -1)
+ {
+ op->reg = 3;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 4)
+ {
+ op->reg = 2;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 8)
+ {
+ op->reg = 2;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ }
+ /* Redundant (yet) check. */
+ else if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used within immediate expression [%s]"), l);
+ else
+ as_bad (_("unknown operand %s"), l);
+
+ return 0;
+ }
+
+ /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */
+ if (*l == '&')
+ {
+ char *h = l;
+
+ op->reg = 2; /* reg 2 in absolute addr mode. */
+ op->am = 1; /* mode As == 01 bin. */
+ op->ol = 1; /* Immediate value followed by instruction. */
+ __tl = h + 1;
+ parse_exp (__tl, &(op->exp));
+ op->mode = OP_EXP;
+ op->vshift = 0;
+ if (op->exp.X_op == O_constant)
+ {
+ int x = op->exp.X_add_number;
+
+ if (allow_20bit_values)
+ {
+ if (x > 0xfffff || x < -(0x7ffff))
+ {
+ as_bad (_("value 0x%x out of extended range."), x);
+ return 1;
+ }
+ }
+ else if (x > 65535 || x < -32768)
+ {
+ as_bad (_("value out of range: 0x%x"), x);
+ return 1;
+ }
+ }
+ else if (op->exp.X_op == O_symbol)
+ ;
+ else
+ {
+ /* Redundant (yet) check. */
+ if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used within absolute expression [%s]"), l);
+ else
+ as_bad (_("unknown expression in operand %s"), l);
+ return 1;
+ }
+ return 0;
+ }
+
+ /* Check if indirect register mode @Rn / postincrement @Rn+. */
+ if (*l == '@')
+ {
+ char *t = l;
+ char *m = strchr (l, '+');
+
+ if (t != l)
+ {
+ as_bad (_("unknown addressing mode %s"), l);
+ return 1;
+ }
+
+ t++;
+
+ if ((op->reg = check_reg (t)) == -1)
+ {
+ as_bad (_("Bad register name %s"), t);
+ return 1;
+ }
+
+ op->mode = OP_REG;
+ op->am = m ? 3 : 2;
+ op->ol = 0;
+
+ /* PC cannot be used in indirect addressing. */
+ if (target_is_430xv2 () && op->reg == 0)
+ {
+ as_bad (_("cannot use indirect addressing with the PC"));
+ return 1;
+ }
+
+ return 0;
+ }
+
+ /* Check if register indexed X(Rn). */
+ do
+ {
+ char *h = strrchr (l, '(');
+ char *m = strrchr (l, ')');
+ char *t;
+
+ *imm_op = TRUE;
+
+ if (!h)
+ break;
+ if (!m)
+ {
+ as_bad (_("')' required"));
+ return 1;
+ }
+
+ t = h;
+ op->am = 1;
+ op->ol = 1;
+
+ /* Extract a register. */
+ if ((op->reg = check_reg (t + 1)) == -1)
+ {
+ as_bad (_
+ ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"),
+ l);
+ return 1;
+ }
+
+ if (op->reg == 2)
+ {
+ as_bad (_("r2 should not be used in indexed addressing mode"));
+ return 1;
+ }
+
+ /* Extract constant. */
+ __tl = l;
+ *h = 0;
+ op->mode = OP_EXP;
+ op->vshift = 0;
+ parse_exp (__tl, &(op->exp));
+ if (op->exp.X_op == O_constant)
+ {
+ int x = op->exp.X_add_number;
+
+ if (allow_20bit_values)
+ {
+ if (x > 0xfffff || x < - (0x7ffff))
+ {
+ as_bad (_("value 0x%x out of extended range."), x);
+ return 1;
+ }
+ }
+ else if (x > 65535 || x < -32768)
+ {
+ as_bad (_("value out of range: 0x%x"), x);
+ return 1;
+ }
+
+ if (x == 0)
+ {
+ op->mode = OP_REG;
+ op->am = 2;
+ op->ol = 0;
+ return 0;
+ }
+ }
+ else if (op->exp.X_op == O_symbol)
+ ;
+ else
+ {
+ /* Redundant (yet) check. */
+ if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used as a prefix of indexed expression [%s]"), l);
+ else
+ as_bad (_("unknown expression in operand %s"), l);
+ return 1;
+ }
+
+ return 0;
+ }
+ while (0);
+
+ /* Possibly register mode 'mov r1,r2'. */
+ if ((op->reg = check_reg (l)) != -1)
+ {
+ op->mode = OP_REG;
+ op->am = 0;
+ op->ol = 0;
+ return 0;
+ }
+
+ /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */
+ do
+ {
+ op->mode = OP_EXP;
+ op->reg = 0; /* PC relative... be careful. */
+ /* An expression starting with a minus sign is a constant, not an address. */
+ op->am = (*l == '-' ? 3 : 1);
+ op->ol = 1;
+ op->vshift = 0;
+ __tl = l;
+ parse_exp (__tl, &(op->exp));
+ return 0;
+ }
+ while (0);
+
+ /* Unreachable. */
+ as_bad (_("unknown addressing mode for operand %s"), l);
+ return 1;
+}
+
+
+static int
+msp430_dstoperand (struct msp430_operand_s * op,
+ char * l,
+ int bin,
+ bfd_boolean allow_20bit_values,
+ bfd_boolean constants_allowed)
+{
+ int dummy;
+ int ret = msp430_srcoperand (op, l, bin, & dummy,
+ allow_20bit_values,
+ constants_allowed);
+
+ if (ret)
+ return ret;
+
+ if (op->am == 2)
+ {
+ char *__tl = "0";
+
+ op->mode = OP_EXP;
+ op->am = 1;
+ op->ol = 1;
+ op->vshift = 0;
+ parse_exp (__tl, &(op->exp));
+
+ if (op->exp.X_op != O_constant || op->exp.X_add_number != 0)
+ {
+ as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"),
+ op->reg, op->reg);
+ return 1;
+ }
+ return 0;
+ }
+
+ if (op->am > 1)
+ {
+ as_bad (_
+ ("this addressing mode is not applicable for destination operand"));
+ return 1;
+ }
+ return 0;
+}
+
+/* Attempt to encode a MOVA instruction with the given operands.
+ Returns the length of the encoded instruction if successful
+ or 0 upon failure. If the encoding fails, an error message
+ will be returned if a pointer is provided. */
+
+static int
+try_encode_mova (bfd_boolean imm_op,
+ int bin,
+ struct msp430_operand_s * op1,
+ struct msp430_operand_s * op2,
+ const char ** error_message_return)
+{
+ short ZEROS = 0;
+ char *frag;
+ int where;
+
+ /* Only a restricted subset of the normal MSP430 addressing modes
+ are supported here, so check for the ones that are allowed. */
+ if (imm_op)
+ {
+ if (op1->mode == OP_EXP)
+ {
+ if (op2->mode != OP_REG)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("expected register as second argument of %s");
+ return 0;
+ }
+
+ if (op1->am == 3)
+ {
+ /* MOVA #imm20, Rdst. */
+ bin |= 0x80 | op2->reg;
+ frag = frag_more (4);
+ where = frag - frag_now->fr_literal;
+ if (op1->exp.X_op == O_constant)
+ {
+ bin |= ((op1->exp.X_add_number >> 16) & 0xf) << 8;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) bin, frag);
+ fix_new_exp (frag_now, where, 4, &(op1->exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_SRC);
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ }
+
+ return 4;
+ }
+ else if (op1->am == 1)
+ {
+ /* MOVA z16(Rsrc), Rdst. */
+ bin |= 0x30 | (op1->reg << 8) | op2->reg;
+ frag = frag_more (4);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ if (op1->exp.X_op == O_constant)
+ {
+ if (op1->exp.X_add_number > 0xffff
+ || op1->exp.X_add_number < -(0x7fff))
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("index value too big for %s");
+ return 0;
+ }
+ bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ fix_new_exp (frag_now, where + 2, 2, &(op1->exp), FALSE,
+ op1->reg == 0 ?
+ BFD_RELOC_MSP430X_PCR16 :
+ BFD_RELOC_MSP430X_ABS16);
+ }
+ return 4;
+ }
+
+ if (error_message_return != NULL)
+ * error_message_return = _("unexpected addressing mode for %s");
+ return 0;
+ }
+ else if (op1->am == 0)
+ {
+ /* MOVA Rsrc, ... */
+ if (op2->mode == OP_REG)
+ {
+ bin |= 0xc0 | (op1->reg << 8) | op2->reg;
+ frag = frag_more (2);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ return 2;
+ }
+ else if (op2->am == 1)
+ {
+ if (op2->reg == 2)
+ {
+ /* MOVA Rsrc, &abs20. */
+ bin |= 0x60 | (op1->reg << 8);
+ frag = frag_more (4);
+ where = frag - frag_now->fr_literal;
+ if (op2->exp.X_op == O_constant)
+ {
+ bin |= (op2->exp.X_add_number >> 16) & 0xf;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ bfd_putl16 (op2->exp.X_add_number & 0xffff, frag + 2);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) bin, frag);
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ fix_new_exp (frag_now, where, 4, &(op2->exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_DST);
+ }
+ return 4;
+ }
+
+ /* MOVA Rsrc, z16(Rdst). */
+ bin |= 0x70 | (op1->reg << 8) | op2->reg;
+ frag = frag_more (4);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ if (op2->exp.X_op == O_constant)
+ {
+ if (op2->exp.X_add_number > 0xffff
+ || op2->exp.X_add_number < -(0x7fff))
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("index value too big for %s");
+ return 0;
+ }
+ bfd_putl16 (op2->exp.X_add_number & 0xffff, frag + 2);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ fix_new_exp (frag_now, where + 2, 2, &(op2->exp), FALSE,
+ op2->reg == 0 ?
+ BFD_RELOC_MSP430X_PCR16 :
+ BFD_RELOC_MSP430X_ABS16);
+ }
+ return 4;
+ }
+
+ if (error_message_return != NULL)
+ * error_message_return = _("unexpected addressing mode for %s");
+ return 0;
+ }
+ }
+
+ /* imm_op == FALSE. */
+
+ if (op1->reg == 2 && op1->am == 1 && op1->mode == OP_EXP)
+ {
+ /* MOVA &abs20, Rdst. */
+ if (op2->mode != OP_REG)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("expected register as second argument of %s");
+ return 0;
+ }
+
+ if (op2->reg == 2 || op2->reg == 3)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("constant generator destination register found in %s");
+ return 0;
+ }
+
+ bin |= 0x20 | op2->reg;
+ frag = frag_more (4);
+ where = frag - frag_now->fr_literal;
+ if (op1->exp.X_op == O_constant)
+ {
+ bin |= ((op1->exp.X_add_number >> 16) & 0xf) << 8;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ bfd_putl16 (op1->exp.X_add_number & 0xffff, frag + 2);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) bin, frag);
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ fix_new_exp (frag_now, where, 4, &(op1->exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_SRC);
+ }
+ return 4;
+ }
+ else if (op1->mode == OP_REG)
+ {
+ if (op1->am == 3)
+ {
+ /* MOVA @Rsrc+, Rdst. */
+ if (op2->mode != OP_REG)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("expected register as second argument of %s");
+ return 0;
+ }
+
+ if (op2->reg == 2 || op2->reg == 3)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("constant generator destination register found in %s");
+ return 0;
+ }
+
+ if (op1->reg == 2 || op1->reg == 3)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("constant generator source register found in %s");
+ return 0;
+ }
+
+ bin |= 0x10 | (op1->reg << 8) | op2->reg;
+ frag = frag_more (2);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ return 2;
+ }
+ else if (op1->am == 2)
+ {
+ /* MOVA @Rsrc,Rdst */
+ if (op2->mode != OP_REG)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("expected register as second argument of %s");
+ return 0;
+ }
+
+ if (op2->reg == 2 || op2->reg == 3)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("constant generator destination register found in %s");
+ return 0;
+ }
+
+ if (op1->reg == 2 || op1->reg == 3)
+ {
+ if (error_message_return != NULL)
+ * error_message_return = _("constant generator source register found in %s");
+ return 0;
+ }
+
+ bin |= (op1->reg << 8) | op2->reg;
+ frag = frag_more (2);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ return 2;
+ }
+ }
+
+ if (error_message_return != NULL)
+ * error_message_return = _("unexpected addressing mode for %s");
+
+ return 0;
+}
+
+static bfd_boolean check_for_nop = FALSE;
+
+#define is_opcode(NAME) (strcmp (opcode->name, NAME) == 0)
+
+/* Parse instruction operands.
+ Return binary opcode. */
+
+static unsigned int
+msp430_operands (struct msp430_opcode_s * opcode, char * line)
+{
+ int bin = opcode->bin_opcode; /* Opcode mask. */
+ int insn_length = 0;
+ char l1[MAX_OP_LEN], l2[MAX_OP_LEN];
+ char *frag;
+ int where;
+ struct msp430_operand_s op1, op2;
+ int res = 0;
+ static short ZEROS = 0;
+ bfd_boolean byte_op, imm_op;
+ int op_length = 0;
+ int fmt;
+ int extended = 0x1800;
+ bfd_boolean extended_op = FALSE;
+ bfd_boolean addr_op;
+ const char * error_message;
+ static signed int repeat_count = 0;
+ bfd_boolean fix_emitted;
+ bfd_boolean nop_check_needed = FALSE;
+
+ /* Opcode is the one from opcodes table
+ line contains something like
+ [.w] @r2+, 5(R1)
+ or
+ .b @r2+, 5(R1). */
+
+ byte_op = FALSE;
+ addr_op = FALSE;
+ if (*line == '.')
+ {
+ bfd_boolean check = FALSE;
+ ++ line;
+
+ switch (TOLOWER (* line))
+ {
+ case 'b':
+ /* Byte operation. */
+ bin |= BYTE_OPERATION;
+ byte_op = TRUE;
+ check = TRUE;
+ break;
+
+ case 'a':
+ /* "Address" ops work on 20-bit values. */
+ addr_op = TRUE;
+ bin |= BYTE_OPERATION;
+ check = TRUE;
+ break;
+
+ case 'w':
+ /* Word operation - this is the default. */
+ check = TRUE;
+ break;
+
+ case 0:
+ case ' ':
+ case '\n':
+ case '\r':
+ as_warn (_("no size modifier after period, .w assumed"));
+ break;
+
+ default:
+ as_bad (_("unrecognised instruction size modifier .%c"),
+ * line);
+ return 0;
+ }
+
+ if (check)
+ {
+ ++ line;
+
+ }
+ }
+
+ if (*line && ! ISSPACE (*line))
+ {
+ as_bad (_("junk found after instruction: %s.%s"),
+ opcode->name, line);
+ return 0;
+ }
+
+ /* Catch the case where the programmer has used a ".a" size modifier on an
+ instruction that does not support it. Look for an alternative extended
+ instruction that has the same name without the period. Eg: "add.a"
+ becomes "adda". Although this not an officially supported way of
+ specifing instruction aliases other MSP430 assemblers allow it. So we
+ support it for compatibility purposes. */
+ if (addr_op && opcode->fmt >= 0)
+ {
+ char * old_name = opcode->name;
+ char real_name[32];
+
+ sprintf (real_name, "%sa", old_name);
+ opcode = hash_find (msp430_hash, real_name);
+ if (opcode == NULL)
+ {
+ as_bad (_("instruction %s.a does not exist"), old_name);
+ return 0;
+ }
+#if 0 /* Enable for debugging. */
+ as_warn ("treating %s.a as %s", old_name, real_name);
+#endif
+ addr_op = FALSE;
+ bin = opcode->bin_opcode;
+ }
+
+ if (opcode->fmt != -1
+ && opcode->insn_opnumb
+ && (!*line || *line == '\n'))
+ {
+ as_bad (_("instruction %s requires %d operand(s)"),
opcode->name, opcode->insn_opnumb);
return 0;
}
memset (&op1, 0, sizeof (op1));
memset (&op2, 0, sizeof (op2));
- imm_op = 0;
+ imm_op = FALSE;
+
+ if ((fmt = opcode->fmt) < 0)
+ {
+ if (! target_is_430x ())
+ {
+ as_bad (_("instruction %s requires MSP430X mcu"),
+ opcode->name);
+ return 0;
+ }
+
+ fmt = (-fmt) - 1;
+ extended_op = TRUE;
+ }
+
+ if (repeat_count)
+ {
+ /* If requested set the extended instruction repeat count. */
+ if (extended_op)
+ {
+ if (repeat_count > 0)
+ extended |= (repeat_count - 1);
+ else
+ extended |= (1 << 7) | (- repeat_count);
+ }
+ else
+ as_bad (_("unable to repeat %s insn"), opcode->name);
+
+ repeat_count = 0;
+ }
+
+ if (check_for_nop && is_opcode ("nop"))
+ check_for_nop = FALSE;
- switch (opcode->fmt)
+ switch (fmt)
{
case 0: /* Emulated. */
switch (opcode->insn_opnumb)
{
case 0:
+ if (is_opcode ("eint") || is_opcode ("dint"))
+ {
+ if (check_for_nop)
+ {
+ if (warn_interrupt_nops)
+ {
+ if (gen_interrupt_nops)
+ as_warn (_("NOP inserted between two instructions that change interrupt state"));
+ else
+ as_warn (_("a NOP might be needed here because of successive changes in interrupt state"));
+ }
+
+ if (gen_interrupt_nops)
+ {
+ /* Emit a NOP between interrupt enable/disable.
+ See 1.3.4.1 of the MSP430x5xx User Guide. */
+ insn_length += 2;
+ frag = frag_more (2);
+ bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
+ }
+ }
+
+ nop_check_needed = TRUE;
+ }
+
/* Set/clear bits instructions. */
- __is = 2;
- frag = frag_more (__is);
+ if (extended_op)
+ {
+ if (!addr_op)
+ extended |= BYTE_OPERATION;
+
+ /* Emit the extension word. */
+ insn_length += 2;
+ frag = frag_more (2);
+ bfd_putl16 (extended, frag);
+ }
+
+ insn_length += 2;
+ frag = frag_more (2);
bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (insn_length);
break;
+
case 1:
/* Something which works with destination operand. */
line = extract_operand (line, l1, sizeof (l1));
- res = msp430_dstoperand (&op1, l1, opcode->bin_opcode);
+ res = msp430_dstoperand (&op1, l1, opcode->bin_opcode, extended_op, TRUE);
if (res)
break;
- bin |= (op1.reg | (op1.am << 7));
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
+ bin |= (op1.reg | (op1.am << 7));
+
+ if (is_opcode ("clr") && bin == 0x4302 /* CLR R2*/)
+ {
+ if (check_for_nop)
+ {
+ if (warn_interrupt_nops)
+ {
+ if (gen_interrupt_nops)
+ as_warn (_("NOP inserted between two instructions that change interrupt state"));
+ else
+ as_warn (_("a NOP might be needed here because of successive changes in interrupt state"));
+ }
+
+ if (gen_interrupt_nops)
+ {
+ /* Emit a NOP between interrupt enable/disable.
+ See 1.3.4.1 of the MSP430x5xx User Guide. */
+ insn_length += 2;
+ frag = frag_more (2);
+ bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
+ }
+ }
+
+ nop_check_needed = TRUE;
+ }
+
+ /* Compute the entire instruction length, in bytes. */
+ op_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2);
+ insn_length += op_length;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+
+ if (extended_op)
+ {
+ if (!addr_op)
+ extended |= BYTE_OPERATION;
+
+ if (op1.ol != 0 && ((extended & 0xf) != 0))
+ {
+ as_bad (_("repeat instruction used with non-register mode instruction"));
+ extended &= ~ 0xf;
+ }
+
+ if (op1.mode == OP_EXP)
+ {
+ if (op1.exp.X_op == O_constant)
+ extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7;
+
+ else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_EXT_SRC);
+ else
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_PCR20_EXT_SRC);
+ }
+
+ /* Emit the extension word. */
+ bfd_putl16 (extended, frag);
+ frag += 2;
+ where += 2;
+ }
+
+ bfd_putl16 ((bfd_vma) bin, frag);
+ frag += 2;
+ where += 2;
+
+ if (op1.mode == OP_EXP)
+ {
+ if (op1.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op1.exp.X_add_number & 0xffff, frag);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
+
+ if (!extended_op)
+ {
+ if (op1.reg)
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
+ }
+
+ dwarf2_emit_insn (insn_length);
+ break;
+
+ case 2:
+ /* Shift instruction. */
+ line = extract_operand (line, l1, sizeof (l1));
+ strncpy (l2, l1, sizeof (l2));
+ l2[sizeof (l2) - 1] = '\0';
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, TRUE);
+ res += msp430_dstoperand (&op2, l2, opcode->bin_opcode, extended_op, TRUE);
+
+ if (res)
+ break; /* An error occurred. All warnings were done before. */
+
+ insn_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2) + (op2.ol * 2);
+ frag = frag_more (insn_length);
+ where = frag - frag_now->fr_literal;
+
+ if (target_is_430xv2 ()
+ && op1.mode == OP_REG
+ && op1.reg == 0
+ && (is_opcode ("rlax")
+ || is_opcode ("rlcx")
+ || is_opcode ("rla")
+ || is_opcode ("rlc")))
+ {
+ as_bad (_("%s: attempt to rotate the PC register"), opcode->name);
+ break;
+ }
+
+ if (extended_op)
+ {
+ if (!addr_op)
+ extended |= BYTE_OPERATION;
+
+ if ((op1.ol != 0 || op2.ol != 0) && ((extended & 0xf) != 0))
+ {
+ as_bad (_("repeat instruction used with non-register mode instruction"));
+ extended &= ~ 0xf;
+ }
+
+ if (op1.mode == OP_EXP)
+ {
+ if (op1.exp.X_op == O_constant)
+ extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7;
+
+ else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_EXT_SRC);
+ else
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_PCR20_EXT_SRC);
+ }
+
+ if (op2.mode == OP_EXP)
+ {
+ if (op2.exp.X_op == O_constant)
+ extended |= (op2.exp.X_add_number >> 16) & 0xf;
+
+ else if (op1.mode == OP_EXP)
+ fix_new_exp (frag_now, where, 8, &(op2.exp), FALSE,
+ op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_ODST
+ : BFD_RELOC_MSP430X_PCR20_EXT_ODST);
+ else
+ fix_new_exp (frag_now, where, 6, &(op2.exp), FALSE,
+ op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_DST
+ : BFD_RELOC_MSP430X_PCR20_EXT_DST);
+ }
+
+ /* Emit the extension word. */
+ bfd_putl16 (extended, frag);
+ frag += 2;
+ where += 2;
+ }
+
+ bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
bfd_putl16 ((bfd_vma) bin, frag);
+ frag += 2;
+ where += 2;
if (op1.mode == OP_EXP)
{
+ if (op1.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op1.exp.X_add_number & 0xffff, frag);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
+
+ if (!extended_op)
+ {
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
+ frag += 2;
where += 2;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ }
- if (op1.reg)
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ if (op2.mode == OP_EXP)
+ {
+ if (op2.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op2.exp.X_add_number & 0xffff, frag);
+ }
else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
+
+ if (!extended_op)
+ {
+ if (op2.reg) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op2.exp), FALSE, CHECK_RELOC_MSP430 (op2));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
}
- break;
-
- case 2:
- {
- /* Shift instruction. */
- line = extract_operand (line, l1, sizeof (l1));
- strncpy (l2, l1, sizeof (l2));
- l2[sizeof (l2) - 1] = '\0';
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
-
- if (res)
- break; /* An error occurred. All warnings were done before. */
-
- bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
-
- __is = 1 + op1.ol + op2.ol; /* insn size in words. */
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
-
- if (op1.mode == OP_EXP)
- {
- where += 2; /* Advance 'where' as we do not know _where_. */
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- if (op2.mode == OP_EXP)
- {
- imm_op = 0;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
+ dwarf2_emit_insn (insn_length);
+ break;
- if (op2.reg) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- break;
- }
case 3:
/* Branch instruction => mov dst, r0. */
- line = extract_operand (line, l1, sizeof (l1));
+ if (extended_op)
+ {
+ as_bad ("Internal error: state 0/3 not coded for extended instructions");
+ break;
+ }
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
+ line = extract_operand (line, l1, sizeof (l1));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, FALSE);
if (res)
break;
- byte_op = 0;
- imm_op = 0;
-
+ byte_op = FALSE;
+ imm_op = FALSE;
bin |= ((op1.reg << 8) | (op1.am << 4));
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
+ op_length = 2 + 2 * op1.ol;
+ frag = frag_more (op_length);
where = frag - frag_now->fr_literal;
bfd_putl16 ((bfd_vma) bin, frag);
if (op1.mode == OP_EXP)
{
- where += 2;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg || (op1.reg == 0 && op1.am == 3))
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ if (op1.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op1.exp.X_add_number & 0xffff, frag + 2);
+ }
else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- break;
- }
- break;
-
- case 1: /* Format 1, double operand. */
- line = extract_operand (line, l1, sizeof (l1));
- line = extract_operand (line, l2, sizeof (l2));
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
-
- if (res)
- break; /* Error occurred. All warnings were done before. */
+ {
+ where += 2;
- bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
- __is = 1 + op1.ol + op2.ol; /* insn size in words. */
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ if (op1.reg || (op1.reg == 0 && op1.am == 3))
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
- if (op1.mode == OP_EXP)
- {
- where += 2; /* Advance where as we do not know _where_. */
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ dwarf2_emit_insn (insn_length + op_length);
+ break;
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
+ case 4:
+ /* CALLA instructions. */
+ fix_emitted = FALSE;
- if (op2.mode == OP_EXP)
- {
- imm_op = 0;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
+ line = extract_operand (line, l1, sizeof (l1));
+ imm_op = FALSE;
- if (op2.reg) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- break;
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op,
+ extended_op, FALSE);
+ if (res)
+ break;
- case 2: /* Single-operand mostly instr. */
- if (opcode->insn_opnumb == 0)
- {
- /* reti instruction. */
- frag = frag_more (2);
- bfd_putl16 ((bfd_vma) bin, frag);
- break;
- }
+ byte_op = FALSE;
- line = extract_operand (line, l1, sizeof (l1));
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- if (res)
- break; /* Error in operand. */
+ op_length = 2 + 2 * op1.ol;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
- bin |= op1.reg | (op1.am << 4);
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ if (imm_op)
+ {
+ if (op1.am == 3)
+ {
+ bin |= 0xb0;
- if (op1.mode == OP_EXP)
- {
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_DST);
+ fix_emitted = TRUE;
+ }
+ else if (op1.am == 1)
+ {
+ if (op1.reg == 0)
+ {
+ bin |= 0x90;
+
+ fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_PCR20_CALL);
+ fix_emitted = TRUE;
+ }
+ else
+ bin |= 0x50 | op1.reg;
+ }
+ else if (op1.am == 0)
+ bin |= 0x40 | op1.reg;
+ }
+ else if (op1.am == 1)
+ {
+ bin |= 0x80;
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where + 2, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- break;
+ fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_DST);
+ fix_emitted = TRUE;
+ }
+ else if (op1.am == 2)
+ bin |= 0x60 | op1.reg;
+ else if (op1.am == 3)
+ bin |= 0x70 | op1.reg;
- case 3: /* Conditional jumps instructions. */
- line = extract_operand (line, l1, sizeof (l1));
- /* l1 is a label. */
- if (l1[0])
- {
- char *m = l1;
- expressionS exp;
+ bfd_putl16 ((bfd_vma) bin, frag);
- if (*m == '$')
- m++;
+ if (op1.mode == OP_EXP)
+ {
+ if (op1.ol != 1)
+ {
+ as_bad ("Internal error: unexpected CALLA instruction length: %d\n", op1.ol);
+ break;
+ }
- parse_exp (m, &exp);
- frag = frag_more (2); /* Instr size is 1 word. */
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
- /* In order to handle something like:
+ if (! fix_emitted)
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op1.exp), FALSE, BFD_RELOC_16);
+ }
- and #0x8000, r5
- tst r5
- jz 4 ; skip next 4 bytes
- inv r5
- inc r5
- nop ; will jump here if r5 positive or zero
+ dwarf2_emit_insn (insn_length + op_length);
+ break;
- jCOND -n ;assumes jump n bytes backward:
+ case 5:
+ {
+ int n;
+ int reg;
- mov r5,r6
- jmp -2
+ /* [POP|PUSH]M[.A] #N, Rd */
+ line = extract_operand (line, l1, sizeof (l1));
+ line = extract_operand (line, l2, sizeof (l2));
- is equal to:
- lab:
- mov r5,r6
- jmp lab
+ if (*l1 != '#')
+ {
+ as_bad (_("expected #n as first argument of %s"), opcode->name);
+ break;
+ }
+ parse_exp (l1 + 1, &(op1.exp));
+ if (op1.exp.X_op != O_constant)
+ {
+ as_bad (_("expected constant expression for first argument of %s"),
+ opcode->name);
+ break;
+ }
- jCOND $n ; jump from PC in either direction. */
+ if ((reg = check_reg (l2)) == -1)
+ {
+ as_bad (_("expected register as second argument of %s"),
+ opcode->name);
+ break;
+ }
- if (exp.X_op == O_constant)
- {
- int x = exp.X_add_number;
+ op_length = 2;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+ bin = opcode->bin_opcode;
+ if (! addr_op)
+ bin |= 0x100;
+ n = op1.exp.X_add_number;
+ bin |= (n - 1) << 4;
+ if (is_opcode ("pushm"))
+ bin |= reg;
+ else
+ {
+ if (reg - n + 1 < 0)
+ {
+ as_bad (_("Too many registers popped"));
+ break;
+ }
+
+ /* CPU21 errata: cannot use POPM to restore the SR register. */
+ if (target_is_430xv2 ()
+ && (reg - n + 1 < 3)
+ && reg >= 2
+ && is_opcode ("popm"))
+ {
+ as_bad (_("Cannot use POPM to restore the SR register"));
+ break;
+ }
+
+ bin |= (reg - n + 1);
+ }
- if (x & 1)
- {
- as_warn (_("Even number required. Rounded to %d"), x + 1);
- x++;
- }
+ bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (op_length);
+ break;
+ }
- if ((*l1 == '$' && x > 0) || x < 0)
- x -= 2;
+ case 6:
+ {
+ int n;
+ int reg;
- x >>= 1;
+ /* Bit rotation instructions. RRCM, RRAM, RRUM, RLAM. */
+ if (extended & 0xff)
+ {
+ as_bad (_("repeat count cannot be used with %s"), opcode->name);
+ break;
+ }
- if (x > 512 || x < -511)
- {
- as_bad (_("Wrong displacement %d"), x << 1);
- break;
- }
+ line = extract_operand (line, l1, sizeof (l1));
+ line = extract_operand (line, l2, sizeof (l2));
- bin |= x & 0x3ff;
- bfd_putl16 ((bfd_vma) bin, frag);
- }
- else if (exp.X_op == O_symbol && *l1 != '$')
- {
- where = frag - frag_now->fr_literal;
- fix_new_exp (frag_now, where, 2,
- &exp, TRUE, BFD_RELOC_MSP430_10_PCREL);
+ if (*l1 != '#')
+ {
+ as_bad (_("expected #n as first argument of %s"), opcode->name);
+ break;
+ }
+ parse_exp (l1 + 1, &(op1.exp));
+ if (op1.exp.X_op != O_constant)
+ {
+ as_bad (_("expected constant expression for first argument of %s"),
+ opcode->name);
+ break;
+ }
+ n = op1.exp.X_add_number;
+ if (n > 4 || n < 1)
+ {
+ as_bad (_("expected first argument of %s to be in the range 1-4"),
+ opcode->name);
+ break;
+ }
- bfd_putl16 ((bfd_vma) bin, frag);
- }
- else if (*l1 == '$')
- {
- as_bad (_("instruction requires label sans '$'"));
- break;
- }
- else
- {
- as_bad (_
- ("instruction requires label or value in range -511:512"));
- break;
- }
- }
- else
- {
- as_bad (_("instruction requires label"));
- break;
- }
- break;
+ if ((reg = check_reg (l2)) == -1)
+ {
+ as_bad (_("expected register as second argument of %s"),
+ opcode->name);
+ break;
+ }
- default:
- as_bad (_("Ilegal instruction or not implmented opcode."));
- }
+ if (target_is_430xv2 () && reg == 0)
+ {
+ as_bad (_("%s: attempt to rotate the PC register"), opcode->name);
+ break;
+ }
- input_line_pointer = line;
- return 0;
-}
+ op_length = 2;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
-static int
-msp430_dstoperand (op, l, bin)
- struct msp430_operand_s *op;
- char *l;
- int bin;
-{
- int dummy;
- int ret = msp430_srcoperand (op, l, bin, &dummy);
- if (ret)
- return ret;
+ bin = opcode->bin_opcode;
+ if (! addr_op)
+ bin |= 0x10;
+ bin |= (n - 1) << 10;
+ bin |= reg;
- if (op->am == 2)
- {
- char *__tl = "0";
+ bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (op_length);
+ break;
+ }
- op->mode = OP_EXP;
- op->am = 1;
- op->ol = 1;
- parse_exp (__tl, &(op->exp));
- if (op->exp.X_op != O_constant || op->exp.X_add_number != 0)
- {
- as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"),
- op->reg, op->reg);
- return 1;
- }
- return 0;
- }
+ case 7:
+ {
+ int reg;
- if (op->am > 1)
- {
- as_bad (_
- ("this addressing mode is not applicable for destination operand"));
- return 1;
- }
- return 0;
-}
+ /* RRUX: Synthetic unsigned right shift of a register by one bit. */
+ if (extended & 0xff)
+ {
+ as_bad (_("repeat count cannot be used with %s"), opcode->name);
+ break;
+ }
+ line = extract_operand (line, l1, sizeof (l1));
+ if ((reg = check_reg (l1)) == -1)
+ {
+ as_bad (_("expected register as argument of %s"),
+ opcode->name);
+ break;
+ }
-static int
-check_reg (t)
- char *t;
-{
- /* If this is a reg numb, str 't' must be a number from 0 - 15. */
+ if (target_is_430xv2 () && reg == 0)
+ {
+ as_bad (_("%s: attempt to rotate the PC register"), opcode->name);
+ break;
+ }
- if (strlen (t) > 2 && *(t + 2) != '+')
- return 1;
+ if (byte_op)
+ {
+ /* Tricky - there is no single instruction that will do this.
+ Encode as: RRA.B rN { BIC.B #0x80, rN */
+ op_length = 6;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+ bin = 0x1140 | reg;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (2);
+ bin = 0xc070 | reg;
+ bfd_putl16 ((bfd_vma) bin, frag + 2);
+ bin = 0x0080;
+ bfd_putl16 ((bfd_vma) bin, frag + 4);
+ dwarf2_emit_insn (4);
+ }
+ else
+ {
+ /* Encode as RRUM[.A] rN. */
+ bin = opcode->bin_opcode;
+ if (! addr_op)
+ bin |= 0x10;
+ bin |= reg;
+ op_length = 2;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (op_length);
+ }
+ break;
+ }
- while (*t)
- {
- if ((*t < '0' || *t > '9') && *t != '+')
- break;
- t++;
- }
+ case 8:
+ {
+ bfd_boolean need_reloc = FALSE;
+ int n;
+ int reg;
- if (*t)
- return 1;
+ /* ADDA, CMPA and SUBA address instructions. */
+ if (extended & 0xff)
+ {
+ as_bad (_("repeat count cannot be used with %s"), opcode->name);
+ break;
+ }
- return 0;
-}
+ line = extract_operand (line, l1, sizeof (l1));
+ line = extract_operand (line, l2, sizeof (l2));
+ bin = opcode->bin_opcode;
-static int
-msp430_srcoperand (op, l, bin, imm_op)
- struct msp430_operand_s *op;
- char *l;
- int bin;
- int *imm_op;
-{
- char *__tl = l;
+ if (*l1 == '#')
+ {
+ parse_exp (l1 + 1, &(op1.exp));
+
+ if (op1.exp.X_op == O_constant)
+ {
+ n = op1.exp.X_add_number;
+ if (n > 0xfffff || n < - (0x7ffff))
+ {
+ as_bad (_("expected value of first argument of %s to fit into 20-bits"),
+ opcode->name);
+ break;
+ }
+
+ bin |= ((n >> 16) & 0xf) << 8;
+ }
+ else
+ {
+ n = 0;
+ need_reloc = TRUE;
+ }
- /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */
- if (*l == '#')
- {
- char *h = l;
- int vshift = -1;
- int rval = 0;
+ op_length = 4;
+ }
+ else
+ {
+ if ((n = check_reg (l1)) == -1)
+ {
+ as_bad (_("expected register name or constant as first argument of %s"),
+ opcode->name);
+ break;
+ }
+
+ bin |= (n << 8) | (1 << 6);
+ op_length = 2;
+ }
- /* Check if there is:
- llo(x) - least significant 16 bits, x &= 0xffff
- lhi(x) - x = (x >> 16) & 0xffff,
- hlo(x) - x = (x >> 32) & 0xffff,
- hhi(x) - x = (x >> 48) & 0xffff
- The value _MUST_ be constant expression: #hlo(1231231231). */
+ if ((reg = check_reg (l2)) == -1)
+ {
+ as_bad (_("expected register as second argument of %s"),
+ opcode->name);
+ break;
+ }
- *imm_op = 1;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+ bin |= reg;
+ if (need_reloc)
+ fix_new_exp (frag_now, where, 4, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_ADR_SRC);
- if (strncasecmp (h, "#llo(", 5) == 0)
- {
- vshift = 0;
- rval = 3;
- }
- else if (strncasecmp (h, "#lhi(", 5) == 0)
- {
- vshift = 1;
- rval = 3;
- }
- else if (strncasecmp (h, "#hlo(", 5) == 0)
- {
- vshift = 2;
- rval = 3;
- }
- else if (strncasecmp (h, "#hhi(", 5) == 0)
- {
- vshift = 3;
- rval = 3;
- }
- else if (strncasecmp (h, "#lo(", 4) == 0)
- {
- vshift = 0;
- rval = 2;
- }
- else if (strncasecmp (h, "#hi(", 4) == 0)
- {
- vshift = 1;
- rval = 2;
- }
+ bfd_putl16 ((bfd_vma) bin, frag);
+ if (op_length == 4)
+ bfd_putl16 ((bfd_vma) (n & 0xffff), frag + 2);
+ dwarf2_emit_insn (op_length);
+ break;
+ }
- op->reg = 0; /* Reg PC. */
- op->am = 3;
- op->ol = 1; /* Immediate will follow an instruction. */
- __tl = h + 1 + rval;
- op->mode = OP_EXP;
- parse_exp (__tl, &(op->exp));
- if (op->exp.X_op == O_constant)
- {
- int x = op->exp.X_add_number;
+ case 9: /* MOVA, BRA, RETA. */
+ imm_op = FALSE;
+ bin = opcode->bin_opcode;
- if (vshift == 0)
- {
- x = x & 0xffff;
- op->exp.X_add_number = x;
- }
- else if (vshift == 1)
+ if (is_opcode ("reta"))
{
- x = (x >> 16) & 0xffff;
- op->exp.X_add_number = x;
+ /* The RETA instruction does not take any arguments.
+ The implicit first argument is @SP+.
+ The implicit second argument is PC. */
+ op1.mode = OP_REG;
+ op1.am = 3;
+ op1.reg = 1;
+
+ op2.mode = OP_REG;
+ op2.reg = 0;
}
- else if (vshift > 1)
+ else
{
- if (x < 0)
- op->exp.X_add_number = -1;
+ line = extract_operand (line, l1, sizeof (l1));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode,
+ &imm_op, extended_op, FALSE);
+
+ if (is_opcode ("bra"))
+ {
+ /* This is the BRA synthetic instruction.
+ The second argument is always PC. */
+ op2.mode = OP_REG;
+ op2.reg = 0;
+ }
else
- op->exp.X_add_number = 0; /* Nothing left. */
- x = op->exp.X_add_number;
- }
+ {
+ line = extract_operand (line, l2, sizeof (l2));
+ res += msp430_dstoperand (&op2, l2, opcode->bin_opcode,
+ extended_op, TRUE);
+ }
- if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768)
- {
- as_bad (_("value %ld out of range. Use #lo() or #hi()"), x);
- return 1;
+ if (res)
+ break; /* Error occurred. All warnings were done before. */
}
- /* Now check constants. */
- /* Substitute register mode with a constant generator if applicable. */
-
- x = (short) x; /* Extend sign. */
-
- if (x == 0)
- {
- op->reg = 3;
- op->am = 0;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 1)
- {
- op->reg = 3;
- op->am = 1;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 2)
- {
- op->reg = 3;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == -1)
+ /* Only a restricted subset of the normal MSP430 addressing modes
+ are supported here, so check for the ones that are allowed. */
+ if ((op_length = try_encode_mova (imm_op, bin, & op1, & op2,
+ & error_message)) == 0)
{
- op->reg = 3;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
+ as_bad (error_message, opcode->name);
+ break;
}
- else if (x == 4)
+ dwarf2_emit_insn (op_length);
+ break;
+
+ case 10: /* RPT */
+ line = extract_operand (line, l1, sizeof l1);
+ /* The RPT instruction only accepted immediates and registers. */
+ if (*l1 == '#')
{
-#ifdef PUSH_1X_WORKAROUND
- if (bin == 0x1200)
+ parse_exp (l1 + 1, &(op1.exp));
+ if (op1.exp.X_op != O_constant)
{
- /* Remove warning as confusing.
- as_warn(_("Hardware push bug workaround")); */
+ as_bad (_("expected constant value as argument to RPT"));
+ break;
}
- else
-#endif
+ if (op1.exp.X_add_number < 1
+ || op1.exp.X_add_number > (1 << 4))
{
- op->reg = 2;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
+ as_bad (_("expected constant in the range 2..16"));
+ break;
}
+
+ /* We silently accept and ignore a repeat count of 1. */
+ if (op1.exp.X_add_number > 1)
+ repeat_count = op1.exp.X_add_number;
}
- else if (x == 8)
+ else
{
-#ifdef PUSH_1X_WORKAROUND
- if (bin == 0x1200)
+ int reg;
+
+ if ((reg = check_reg (l1)) != -1)
{
- /* Remove warning as confusing.
- as_warn(_("Hardware push bug workaround")); */
+ if (reg == 0)
+ as_warn (_("PC used as an argument to RPT"));
+ else
+ repeat_count = - reg;
}
else
-#endif
{
- op->reg = 2;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
+ as_bad (_("expected constant or register name as argument to RPT insn"));
+ break;
}
}
+ break;
+
+ default:
+ as_bad (_("Illegal emulated instruction "));
+ break;
}
- else if (op->exp.X_op == O_symbol)
- {
- op->mode = OP_EXP;
- }
- else if (op->exp.X_op == O_big)
+ break;
+
+ case 1: /* Format 1, double operand. */
+ line = extract_operand (line, l1, sizeof (l1));
+ line = extract_operand (line, l2, sizeof (l2));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op, extended_op, TRUE);
+ res += msp430_dstoperand (&op2, l2, opcode->bin_opcode, extended_op, TRUE);
+
+ if (res)
+ break; /* Error occurred. All warnings were done before. */
+
+ if (extended_op
+ && is_opcode ("movx")
+ && addr_op
+ && msp430_enable_relax)
{
- short x;
- if (vshift != -1)
- {
- op->exp.X_op = O_constant;
- op->exp.X_add_number = 0xffff & generic_bignum[vshift];
- x = op->exp.X_add_number;
- }
- else
+ /* This is the MOVX.A instruction. See if we can convert
+ it into the MOVA instruction instead. This saves 2 bytes. */
+ if ((op_length = try_encode_mova (imm_op, 0x0000, & op1, & op2,
+ NULL)) != 0)
{
- as_bad (_
- ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "),
- l);
- return 1;
+ dwarf2_emit_insn (op_length);
+ break;
}
+ }
- if (x == 0)
- {
- op->reg = 3;
- op->am = 0;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 1)
- {
- op->reg = 3;
- op->am = 1;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 2)
+ bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
+
+ if ( (is_opcode ("bic") && bin == 0xc232)
+ || (is_opcode ("bis") && bin == 0xd232)
+ || (is_opcode ("mov") && op2.mode == OP_REG && op2.reg == 2))
+ {
+ if (check_for_nop)
{
- op->reg = 3;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
+ if (warn_interrupt_nops)
+ {
+ if (gen_interrupt_nops)
+ as_warn (_("NOP inserted between two instructions that change interrupt state"));
+ else
+ as_warn (_("a NOP might be needed here because of successive changes in interrupt state"));
+ }
+
+ if (gen_interrupt_nops)
+ {
+ /* Emit a NOP between interrupt enable/disable.
+ See 1.3.4.1 of the MSP430x5xx User Guide. */
+ insn_length += 2;
+ frag = frag_more (2);
+ bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
+ }
}
- else if (x == -1)
+
+ nop_check_needed = TRUE;
+ }
+
+ /* Compute the entire length of the instruction in bytes. */
+ op_length = (extended_op ? 2 : 0) /* The extension word. */
+ + 2 /* The opcode */
+ + (2 * op1.ol) /* The first operand. */
+ + (2 * op2.ol); /* The second operand. */
+
+ insn_length += op_length;
+ frag = frag_more (op_length);
+ where = frag - frag_now->fr_literal;
+
+ if (extended_op)
+ {
+ if (!addr_op)
+ extended |= BYTE_OPERATION;
+
+ if ((op1.ol != 0 || op2.ol != 0) && ((extended & 0xf) != 0))
{
- op->reg = 3;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
+ as_bad (_("repeat instruction used with non-register mode instruction"));
+ extended &= ~ 0xf;
}
- else if (x == 4)
+
+ /* If necessary, emit a reloc to update the extension word. */
+ if (op1.mode == OP_EXP)
{
- op->reg = 2;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
+ if (op1.exp.X_op == O_constant)
+ extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7;
+
+ else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_EXT_SRC);
+ else
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_PCR20_EXT_SRC);
}
- else if (x == 8)
- {
- op->reg = 2;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
+
+ if (op2.mode == OP_EXP)
+ {
+ if (op2.exp.X_op == O_constant)
+ extended |= (op2.exp.X_add_number >> 16) & 0xf;
+
+ else if (op1.mode == OP_EXP)
+ fix_new_exp (frag_now, where, 8, &(op2.exp), FALSE,
+ op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_ODST
+ : BFD_RELOC_MSP430X_PCR20_EXT_ODST);
+
+ else
+ fix_new_exp (frag_now, where, 6, &(op2.exp), FALSE,
+ op2.reg ? BFD_RELOC_MSP430X_ABS20_EXT_DST
+ : BFD_RELOC_MSP430X_PCR20_EXT_DST);
}
+
+ /* Emit the extension word. */
+ bfd_putl16 (extended, frag);
+ where += 2;
+ frag += 2;
}
- else
- {
- as_bad (_("unknown operand %s"), l);
- }
- return 0;
- }
- /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */
- if (*l == '&')
- {
- char *h = l;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ where += 2;
+ frag += 2;
- op->reg = 2; /* reg 2 in absolute addr mode. */
- op->am = 1; /* mode As == 01 bin. */
- op->ol = 1; /* Immediate value followed by instruction. */
- __tl = h + 1;
- parse_exp (__tl, &(op->exp));
- op->mode = OP_EXP;
- if (op->exp.X_op == O_constant)
+ if (op1.mode == OP_EXP)
{
- int x = op->exp.X_add_number;
- if (x > 65535 || x < -32768)
+ if (op1.exp.X_op == O_constant)
{
- as_bad (_("value out of range: %d"), x);
- return 1;
+ bfd_putl16 (op1.exp.X_add_number & 0xffff, frag);
}
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
+
+ if (!extended_op)
+ {
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
+
+ where += 2;
+ frag += 2;
}
- else if (op->exp.X_op == O_symbol)
- {
- }
- else
+
+ if (op2.mode == OP_EXP)
{
- as_bad (_("unknown expression in operand %s"), l);
- return 1;
+ if (op2.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op2.exp.X_add_number & 0xffff, frag);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
+
+ if (!extended_op)
+ {
+ if (op2.reg) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op2.exp), FALSE, CHECK_RELOC_MSP430 (op2));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
}
- return 0;
- }
- /* Check if indirect register mode @Rn / postincrement @Rn+. */
- if (*l == '@')
- {
- char *t = l;
- char *m = strchr (l, '+');
+ dwarf2_emit_insn (insn_length);
+ break;
- if (t != l)
+ case 2: /* Single-operand mostly instr. */
+ if (opcode->insn_opnumb == 0)
{
- as_bad (_("unknown addressing mode %s"), l);
- return 1;
+ /* reti instruction. */
+ insn_length += 2;
+ frag = frag_more (2);
+ bfd_putl16 ((bfd_vma) bin, frag);
+ dwarf2_emit_insn (insn_length);
+ break;
}
- t++;
- if (*t != 'r' && *t != 'R')
+ line = extract_operand (line, l1, sizeof (l1));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode,
+ &imm_op, extended_op, TRUE);
+ if (res)
+ break; /* Error in operand. */
+
+ if (target_is_430xv2 ()
+ && op1.mode == OP_REG
+ && op1.reg == 0
+ && (is_opcode ("rrax")
+ || is_opcode ("rrcx")
+ || is_opcode ("rra")
+ || is_opcode ("rrc")))
{
- as_bad (_("unknown addressing mode %s"), l);
- return 1;
+ as_bad (_("%s: attempt to rotate the PC register"), opcode->name);
+ break;
}
- t++; /* Points to the reg value. */
+ insn_length = (extended_op ? 2 : 0) + 2 + (op1.ol * 2);
+ frag = frag_more (insn_length);
+ where = frag - frag_now->fr_literal;
- if (check_reg (t))
+ if (extended_op)
{
- as_bad (_("Bad register name r%s"), t);
- return 1;
- }
+ if (is_opcode ("swpbx") || is_opcode ("sxtx"))
+ {
+ /* These two instructions use a special
+ encoding of the A/L and B/W bits. */
+ bin &= ~ BYTE_OPERATION;
- op->mode = OP_REG;
- op->am = m ? 3 : 2;
- op->ol = 0;
- if (m)
- *m = 0; /* strip '+' */
- op->reg = atoi (t);
- if (op->reg < 0 || op->reg > 15)
- {
- as_bad (_("MSP430 does not have %d registers"), op->reg);
- return 1;
- }
+ if (byte_op)
+ {
+ as_bad (_("%s instruction does not accept a .b suffix"),
+ opcode->name);
+ break;
+ }
+ else if (! addr_op)
+ extended |= BYTE_OPERATION;
+ }
+ else if (! addr_op)
+ extended |= BYTE_OPERATION;
- return 0;
- }
+ if (op1.ol != 0 && ((extended & 0xf) != 0))
+ {
+ as_bad (_("repeat instruction used with non-register mode instruction"));
+ extended &= ~ 0xf;
+ }
- /* Check if register indexed X(Rn). */
- do
- {
- char *h = strrchr (l, '(');
- char *m = strrchr (l, ')');
- char *t;
+ if (op1.mode == OP_EXP)
+ {
+ if (op1.exp.X_op == O_constant)
+ extended |= ((op1.exp.X_add_number >> 16) & 0xf) << 7;
- *imm_op = 1;
+ else if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_ABS20_EXT_SRC);
+ else
+ fix_new_exp (frag_now, where, 6, &(op1.exp), FALSE,
+ BFD_RELOC_MSP430X_PCR20_EXT_SRC);
+ }
- if (!h)
- break;
- if (!m)
- {
- as_bad (_("')' required"));
- return 1;
+ /* Emit the extension word. */
+ bfd_putl16 (extended, frag);
+ frag += 2;
+ where += 2;
}
- t = h;
- op->am = 1;
- op->ol = 1;
- /* Extract a register. */
- t++; /* Advance pointer. */
+ bin |= op1.reg | (op1.am << 4);
+ bfd_putl16 ((bfd_vma) bin, frag);
+ frag += 2;
+ where += 2;
- if (*t != 'r' && *t != 'R')
+ if (op1.mode == OP_EXP)
{
- as_bad (_
- ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"),
- l);
- return 1;
- }
- t++;
+ if (op1.exp.X_op == O_constant)
+ {
+ bfd_putl16 (op1.exp.X_add_number & 0xffff, frag);
+ }
+ else
+ {
+ bfd_putl16 ((bfd_vma) ZEROS, frag);
- op->reg = *t - '0';
- if (op->reg > 9 || op->reg < 0)
- {
- as_bad (_("unknown operator (r%s substituded as a register name"),
- t);
- return 1;
+ if (!extended_op)
+ {
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430 (op1));
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ }
}
- t++;
- if (*t != ')')
+
+ dwarf2_emit_insn (insn_length);
+ break;
+
+ case 3: /* Conditional jumps instructions. */
+ line = extract_operand (line, l1, sizeof (l1));
+ /* l1 is a label. */
+ if (l1[0])
{
- op->reg = op->reg * 10;
- op->reg += *t - '0';
+ char *m = l1;
+ expressionS exp;
+
+ if (*m == '$')
+ m++;
+
+ parse_exp (m, &exp);
+
+ /* In order to handle something like:
+
+ and #0x8000, r5
+ tst r5
+ jz 4 ; skip next 4 bytes
+ inv r5
+ inc r5
+ nop ; will jump here if r5 positive or zero
+
+ jCOND -n ;assumes jump n bytes backward:
+
+ mov r5,r6
+ jmp -2
+
+ is equal to:
+ lab:
+ mov r5,r6
+ jmp lab
+
+ jCOND $n ; jump from PC in either direction. */
- if (op->reg > 15)
+ if (exp.X_op == O_constant)
{
- as_bad (_("unknown operator %s"), l);
- return 1;
+ int x = exp.X_add_number;
+
+ if (x & 1)
+ {
+ as_warn (_("Even number required. Rounded to %d"), x + 1);
+ x++;
+ }
+
+ if ((*l1 == '$' && x > 0) || x < 0)
+ x -= 2;
+
+ x >>= 1;
+
+ if (x > 512 || x < -511)
+ {
+ as_bad (_("Wrong displacement %d"), x << 1);
+ break;
+ }
+
+ insn_length += 2;
+ frag = frag_more (2); /* Instr size is 1 word. */
+
+ bin |= x & 0x3ff;
+ bfd_putl16 ((bfd_vma) bin, frag);
}
- if (op->reg == 2)
+ else if (exp.X_op == O_symbol && *l1 != '$')
{
- as_bad (_("r2 should not be used in indexed addressing mode"));
- return 1;
- }
+ insn_length += 2;
+ frag = frag_more (2); /* Instr size is 1 word. */
+ where = frag - frag_now->fr_literal;
+ fix_new_exp (frag_now, where, 2,
+ &exp, TRUE, BFD_RELOC_MSP430_10_PCREL);
- if (*(t + 1) != ')')
+ bfd_putl16 ((bfd_vma) bin, frag);
+ }
+ else if (*l1 == '$')
{
- as_bad (_("unknown operator %s"), l);
- return 1;
+ as_bad (_("instruction requires label sans '$'"));
}
+ else
+ as_bad (_
+ ("instruction requires label or value in range -511:512"));
+ dwarf2_emit_insn (insn_length);
+ break;
+ }
+ else
+ {
+ as_bad (_("instruction requires label"));
+ break;
}
+ break;
- /* Extract constant. */
- __tl = l;
- *h = 0;
- op->mode = OP_EXP;
- parse_exp (__tl, &(op->exp));
- if (op->exp.X_op == O_constant)
+ case 4: /* Extended jumps. */
+ if (!msp430_enable_polys)
{
- int x = op->exp.X_add_number;
+ as_bad (_("polymorphs are not enabled. Use -mP option to enable."));
+ break;
+ }
+
+ line = extract_operand (line, l1, sizeof (l1));
+ if (l1[0])
+ {
+ char *m = l1;
+ expressionS exp;
- if (x > 65535 || x < -32768)
- {
- as_bad (_("value out of range: %d"), x);
- return 1;
- }
+ /* Ignore absolute addressing. make it PC relative anyway. */
+ if (*m == '#' || *m == '$')
+ m++;
- if (x == 0)
+ parse_exp (m, & exp);
+ if (exp.X_op == O_symbol)
{
- op->mode = OP_REG;
- op->am = 2;
- op->ol = 0;
- return 0;
+ /* Relaxation required. */
+ struct rcodes_s rc = msp430_rcodes[opcode->insn_opnumb];
+
+ if (target_is_430x ())
+ rc = msp430x_rcodes[opcode->insn_opnumb];
+
+ /* The parameter to dwarf2_emit_insn is actually the offset to
+ the start of the insn from the fix piece of instruction that
+ was emitted. Since next fragments may have variable size we
+ tie debug info to the beginning of the instruction. */
+ insn_length += 8;
+ frag = frag_more (8);
+ dwarf2_emit_insn (0);
+ bfd_putl16 ((bfd_vma) rc.sop, frag);
+ frag = frag_variant (rs_machine_dependent, 8, 2,
+ /* Wild guess. */
+ ENCODE_RELAX (rc.lpos, STATE_BITS10),
+ exp.X_add_symbol,
+ 0, /* Offset is zero if jump dist less than 1K. */
+ (char *) frag);
+ break;
}
}
- else if (op->exp.X_op == O_symbol)
+
+ as_bad (_("instruction requires label"));
+ break;
+
+ case 5: /* Emulated extended branches. */
+ if (!msp430_enable_polys)
{
+ as_bad (_("polymorphs are not enabled. Use -mP option to enable."));
+ break;
}
- else
+ line = extract_operand (line, l1, sizeof (l1));
+ if (l1[0])
{
- as_bad (_("unknown expression in operand %s"), l);
- return 1;
+ char * m = l1;
+ expressionS exp;
+
+ /* Ignore absolute addressing. make it PC relative anyway. */
+ if (*m == '#' || *m == '$')
+ m++;
+
+ parse_exp (m, & exp);
+ if (exp.X_op == O_symbol)
+ {
+ /* Relaxation required. */
+ struct hcodes_s hc = msp430_hcodes[opcode->insn_opnumb];
+
+ if (target_is_430x ())
+ hc = msp430x_hcodes[opcode->insn_opnumb];
+
+ insn_length += 8;
+ frag = frag_more (8);
+ dwarf2_emit_insn (0);
+ bfd_putl16 ((bfd_vma) hc.op0, frag);
+ bfd_putl16 ((bfd_vma) hc.op1, frag+2);
+
+ frag = frag_variant (rs_machine_dependent, 8, 2,
+ ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10), /* Wild guess. */
+ exp.X_add_symbol,
+ 0, /* Offset is zero if jump dist less than 1K. */
+ (char *) frag);
+ break;
+ }
}
- return 0;
- }
- while (0);
+ as_bad (_("instruction requires label"));
+ break;
- /* Register mode 'mov r1,r2'. */
- do
- {
- char *t = l;
+ default:
+ as_bad (_("Illegal instruction or not implemented opcode."));
+ }
- /* Operand should be a register. */
- if (*t == 'r' || *t == 'R')
- {
- int x = atoi (t + 1);
+ input_line_pointer = line;
+ check_for_nop = nop_check_needed;
+ return 0;
+}
- if (check_reg (t + 1))
- break;
+void
+md_assemble (char * str)
+{
+ struct msp430_opcode_s * opcode;
+ char cmd[32];
+ unsigned int i = 0;
- if (x < 0 || x > 15)
- break; /* Symbolic mode. */
+ str = skip_space (str); /* Skip leading spaces. */
+ str = extract_cmd (str, cmd, sizeof (cmd));
- op->mode = OP_REG;
- op->am = 0;
- op->ol = 0;
- op->reg = x;
- return 0;
- }
+ while (cmd[i] && i < sizeof (cmd))
+ {
+ char a = TOLOWER (cmd[i]);
+ cmd[i] = a;
+ i++;
}
- while (0);
- /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */
- do
+ if (!cmd[0])
{
- char *t = l;
-
- __tl = l;
+ as_bad (_("can't find opcode "));
+ return;
+ }
- while (*t)
- {
- /* alpha/number underline dot for labels. */
- if (! ISALNUM (*t) && *t != '_' && *t != '.')
- {
- as_bad (_("unknown operand %s"), l);
- return 1;
- }
- t++;
- }
+ opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd);
- op->mode = OP_EXP;
- op->reg = 0; /* PC relative... be careful. */
- op->am = 1;
- op->ol = 1;
- __tl = l;
- parse_exp (__tl, &(op->exp));
- return 0;
+ if (opcode == NULL)
+ {
+ as_bad (_("unknown opcode `%s'"), cmd);
+ return;
}
- while (0);
- /* Unreachable. */
- as_bad (_("unknown addressing mode for operand %s"), l);
- return 1;
-}
+ {
+ char *__t = input_line_pointer;
+ msp430_operands (opcode, str);
+ input_line_pointer = __t;
+ }
+}
/* GAS will call this function for each section at the end of the assembly,
to permit the CPU backend to adjust the alignment of a section. */
valueT
-md_section_align (seg, addr)
- asection *seg;
- valueT addr;
+md_section_align (asection * seg, valueT addr)
{
int align = bfd_get_section_alignment (stdoutput, seg);
macro would return the length of an instruction. */
long
-md_pcrel_from_section (fixp, sec)
- fixS *fixp;
- segT sec;
+md_pcrel_from_section (fixS * fixp, segT sec)
{
if (fixp->fx_addsy != (symbolS *) NULL
&& (!S_IS_DEFINED (fixp->fx_addsy)
return fixp->fx_frag->fr_address + fixp->fx_where;
}
+/* Replaces standard TC_FORCE_RELOCATION_LOCAL.
+ Now it handles the situation when relocations
+ have to be passed to linker. */
+int
+msp430_force_relocation_local (fixS *fixp)
+{
+ if (fixp->fx_r_type == BFD_RELOC_MSP430_10_PCREL)
+ return 1;
+ if (fixp->fx_pcrel)
+ return 1;
+ if (msp430_enable_polys
+ && !msp430_enable_relax)
+ return 1;
+
+ return (!fixp->fx_pcrel
+ || generic_force_reloc (fixp));
+}
+
+
/* GAS will call this for each fixup. It should store the correct
value in the object file. */
-
void
-md_apply_fix3 (fixp, valuep, seg)
- fixS *fixp;
- valueT *valuep;
- segT seg;
+md_apply_fix (fixS * fixp, valueT * valuep, segT seg)
{
- unsigned char *where;
+ unsigned char * where;
unsigned long insn;
long value;
if (fixp->fx_addsy && (s == seg || s == absolute_section))
{
- value = S_GET_VALUE (fixp->fx_addsy) + *valuep;
+ /* FIXME: We can appear here only in case if we perform a pc
+ relative jump to the label which is i) global, ii) locally
+ defined or this is a jump to an absolute symbol.
+ If this is an absolute symbol -- everything is OK.
+ If this is a global label, we've got a symbol value defined
+ twice:
+ 1. S_GET_VALUE (fixp->fx_addsy) will contain a symbol offset
+ from this section start
+ 2. *valuep will contain the real offset from jump insn to the
+ label
+ So, the result of S_GET_VALUE (fixp->fx_addsy) + (* valuep);
+ will be incorrect. Therefore remove s_get_value. */
+ value = /* S_GET_VALUE (fixp->fx_addsy) + */ * valuep;
fixp->fx_done = 1;
}
else
value -= S_GET_VALUE (fixp->fx_subsy);
fixp->fx_done = 1;
}
- else
- {
- /* We don't actually support subtracting a symbol. */
- as_bad_where (fixp->fx_file, fixp->fx_line,
- _("expression too complex"));
- }
}
}
- switch (fixp->fx_r_type)
+ fixp->fx_no_overflow = 1;
+
+ /* If polymorphs are enabled and relax disabled.
+ do not kill any relocs and pass them to linker. */
+ if (msp430_enable_polys
+ && !msp430_enable_relax)
{
- default:
- fixp->fx_no_overflow = 1;
- break;
- case BFD_RELOC_MSP430_10_PCREL:
- break;
+ if (!fixp->fx_addsy || (fixp->fx_addsy
+ && S_GET_SEGMENT (fixp->fx_addsy) == absolute_section))
+ fixp->fx_done = 1; /* It is ok to kill 'abs' reloc. */
+ else
+ fixp->fx_done = 0;
}
if (fixp->fx_done)
{
/* Fetch the instruction, insert the fully resolved operand
value, and stuff the instruction back again. */
-
- where = fixp->fx_frag->fr_literal + fixp->fx_where;
+ where = (unsigned char *) fixp->fx_frag->fr_literal + fixp->fx_where;
insn = bfd_getl16 (where);
bfd_putl16 ((bfd_vma) (value | insn), where);
break;
+ case BFD_RELOC_MSP430X_PCR16:
+ case BFD_RELOC_MSP430_RL_PCREL:
case BFD_RELOC_MSP430_16_PCREL:
if (value & 1)
as_bad_where (fixp->fx_file, fixp->fx_line,
_("odd address operand: %ld"), value);
+ /* Fall through. */
+ case BFD_RELOC_MSP430_16_PCREL_BYTE:
/* Nothing to be corrected here. */
if (value < -32768 || value > 65536)
as_bad_where (fixp->fx_file, fixp->fx_line,
_("operand out of range: %ld"), value);
+ /* Fall through. */
+ case BFD_RELOC_MSP430X_ABS16:
+ case BFD_RELOC_MSP430_16:
+ case BFD_RELOC_16:
+ case BFD_RELOC_MSP430_16_BYTE:
value &= 0xffff; /* Get rid of extended sign. */
bfd_putl16 ((bfd_vma) value, where);
break;
- case BFD_RELOC_MSP430_16_PCREL_BYTE:
- /* Nothing to be corrected here. */
- if (value < -32768 || value > 65536)
- as_bad_where (fixp->fx_file, fixp->fx_line,
- _("operand out of range: %ld"), value);
-
+ case BFD_RELOC_MSP430_ABS_HI16:
+ value >>= 16;
value &= 0xffff; /* Get rid of extended sign. */
bfd_putl16 ((bfd_vma) value, where);
break;
-
+
case BFD_RELOC_32:
bfd_putl16 ((bfd_vma) value, where);
break;
- case BFD_RELOC_MSP430_16:
- case BFD_RELOC_16:
- case BFD_RELOC_MSP430_16_BYTE:
- value &= 0xffff;
- bfd_putl16 ((bfd_vma) value, where);
+ case BFD_RELOC_MSP430_ABS8:
+ case BFD_RELOC_8:
+ bfd_put_8 (NULL, (bfd_vma) value, where);
+ break;
+
+ case BFD_RELOC_MSP430X_ABS20_EXT_SRC:
+ case BFD_RELOC_MSP430X_PCR20_EXT_SRC:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 4);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) (((value & 0xf) << 7) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_ABS20_ADR_SRC:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) (((value & 0xf) << 8) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_ABS20_EXT_ODST:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 6);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_PCR20_CALL:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_ABS20_EXT_DST:
+ case BFD_RELOC_MSP430X_PCR20_EXT_DST:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 4);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_PCR20_EXT_ODST:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 6);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where);
+ break;
+
+ case BFD_RELOC_MSP430X_ABS20_ADR_DST:
+ bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
+ value >>= 16;
+ bfd_putl16 ((bfd_vma) ((value & 0xf) | insn), where);
break;
default:
}
}
-/* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS
- will pass the resulting reloc to `bfd_install_relocation'. This
- currently works poorly, as `bfd_install_relocation' often does the
- wrong thing, and instances of `tc_gen_reloc' have been written to
- work around the problems, which in turns makes it difficult to fix
- `bfd_install_relocation'. */
+static bfd_boolean
+S_IS_GAS_LOCAL (symbolS * s)
+{
+ const char * name;
+ unsigned int len;
+
+ if (s == NULL)
+ return FALSE;
+ name = S_GET_NAME (s);
+ len = strlen (name) - 1;
+
+ return name[len] == 1 || name[len] == 2;
+}
+
+/* GAS will call this to generate a reloc, passing the resulting reloc
+ to `bfd_install_relocation'. This currently works poorly, as
+ `bfd_install_relocation' often does the wrong thing, and instances of
+ `tc_gen_reloc' have been written to work around the problems, which
+ in turns makes it difficult to fix `bfd_install_relocation'. */
/* If while processing a fixup, a reloc really needs to be created
then it is done here. */
-arelent *
-tc_gen_reloc (seg, fixp)
- asection *seg ATTRIBUTE_UNUSED;
- fixS *fixp;
+arelent **
+tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp)
{
+ static arelent * no_relocs = NULL;
+ static arelent * relocs[MAX_RELOC_EXPANSION + 1];
arelent *reloc;
- reloc = (arelent *) xmalloc (sizeof (arelent));
-
- reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
- *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
-
+ reloc = xmalloc (sizeof (arelent));
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
+
if (reloc->howto == (reloc_howto_type *) NULL)
{
as_bad_where (fixp->fx_file, fixp->fx_line,
_("reloc %d not supported by object file format"),
(int) fixp->fx_r_type);
- return NULL;
+ free (reloc);
+ return & no_relocs;
+ }
+
+ relocs[0] = reloc;
+ relocs[1] = NULL;
+
+ if (fixp->fx_subsy
+ && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
+ {
+ fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy);
+ fixp->fx_subsy = NULL;
+ }
+
+ if (fixp->fx_addsy && fixp->fx_subsy)
+ {
+ asection *asec, *ssec;
+
+ asec = S_GET_SEGMENT (fixp->fx_addsy);
+ ssec = S_GET_SEGMENT (fixp->fx_subsy);
+
+ /* If we have a difference between two different, non-absolute symbols
+ we must generate two relocs (one for each symbol) and allow the
+ linker to resolve them - relaxation may change the distances between
+ symbols, even local symbols defined in the same section.
+
+ Unfortunately we cannot do this with assembler generated local labels
+ because there can be multiple incarnations of the same label, with
+ exactly the same name, in any given section and the linker will have
+ no way to identify the correct one. Instead we just have to hope
+ that no relaxtion will occur between the local label and the other
+ symbol in the expression.
+
+ Similarly we have to compute differences between symbols in the .eh_frame
+ section as the linker is not smart enough to apply relocations there
+ before attempting to process it. */
+ if ((ssec != absolute_section || asec != absolute_section)
+ && (fixp->fx_addsy != fixp->fx_subsy)
+ && strcmp (ssec->name, ".eh_frame") != 0
+ && ! S_IS_GAS_LOCAL (fixp->fx_addsy)
+ && ! S_IS_GAS_LOCAL (fixp->fx_subsy))
+ {
+ arelent * reloc2 = xmalloc (sizeof * reloc);
+
+ relocs[0] = reloc2;
+ relocs[1] = reloc;
+
+ reloc2->address = reloc->address;
+ reloc2->howto = bfd_reloc_type_lookup (stdoutput,
+ BFD_RELOC_MSP430_SYM_DIFF);
+ reloc2->addend = - S_GET_VALUE (fixp->fx_subsy);
+
+ if (ssec == absolute_section)
+ reloc2->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ else
+ {
+ reloc2->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
+ *reloc2->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
+ }
+
+ reloc->addend = fixp->fx_offset;
+ if (asec == absolute_section)
+ {
+ reloc->addend += S_GET_VALUE (fixp->fx_addsy);
+ reloc->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ }
+ else
+ {
+ reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
+ *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
+ }
+
+ fixp->fx_pcrel = 0;
+ fixp->fx_done = 1;
+ return relocs;
+ }
+ else
+ {
+ char *fixpos = fixp->fx_where + fixp->fx_frag->fr_literal;
+
+ reloc->addend = (S_GET_VALUE (fixp->fx_addsy)
+ - S_GET_VALUE (fixp->fx_subsy) + fixp->fx_offset);
+
+ switch (fixp->fx_r_type)
+ {
+ case BFD_RELOC_8:
+ md_number_to_chars (fixpos, reloc->addend, 1);
+ break;
+
+ case BFD_RELOC_16:
+ md_number_to_chars (fixpos, reloc->addend, 2);
+ break;
+
+ case BFD_RELOC_24:
+ md_number_to_chars (fixpos, reloc->addend, 3);
+ break;
+
+ case BFD_RELOC_32:
+ md_number_to_chars (fixpos, reloc->addend, 4);
+ break;
+
+ default:
+ reloc->sym_ptr_ptr
+ = (asymbol **) bfd_abs_section_ptr->symbol_ptr_ptr;
+ return relocs;
+ }
+
+ free (reloc);
+ return & no_relocs;
+ }
}
+ else
+ {
+#if 0
+ if (fixp->fx_r_type == BFD_RELOC_MSP430X_ABS16
+ && S_GET_SEGMENT (fixp->fx_addsy) == absolute_section)
+ {
+ bfd_vma amount = S_GET_VALUE (fixp->fx_addsy);
+ char *fixpos = fixp->fx_where + fixp->fx_frag->fr_literal;
- if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
- || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
- reloc->address = fixp->fx_offset;
+ md_number_to_chars (fixpos, amount, 2);
+ free (reloc);
+ return & no_relocs;
+ }
+#endif
+ reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
+ *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
+ reloc->addend = fixp->fx_offset;
- reloc->addend = fixp->fx_offset;
+ if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
+ || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
+ reloc->address = fixp->fx_offset;
+ }
- return reloc;
+ return relocs;
}
-/* Parse ordinary expression. */
+int
+md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED,
+ asection * segment_type ATTRIBUTE_UNUSED)
+{
+ if (fragP->fr_symbol && S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
+ {
+ /* This is a jump -> pcrel mode. Nothing to do much here.
+ Return value == 2. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_BITS10);
+ }
+ else if (fragP->fr_symbol)
+ {
+ /* Its got a segment, but its not ours. Even if fr_symbol is in
+ an absolute segment, we don't know a displacement until we link
+ object files. So it will always be long. This also applies to
+ labels in a subsegment of current. Liker may relax it to short
+ jump later. Return value == 8. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_WORD);
+ }
+ else
+ {
+ /* We know the abs value. may be it is a jump to fixed address.
+ Impossible in our case, cause all constants already handled. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_UNDEF);
+ }
-static char *
-parse_exp (s, op)
- char *s;
- expressionS *op;
+ return md_relax_table[fragP->fr_subtype].rlx_length;
+}
+
+void
+md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ fragS * fragP)
{
- input_line_pointer = s;
- expression (op);
- if (op->X_op == O_absent)
- as_bad (_("missing operand"));
- return input_line_pointer;
+ char * where = 0;
+ int rela = -1;
+ int i;
+ struct rcodes_s * cc = NULL;
+ struct hcodes_s * hc = NULL;
+
+ switch (fragP->fr_subtype)
+ {
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_BITS10):
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_BITS10):
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_BITS10):
+ /* We do not have to convert anything here.
+ Just apply a fix. */
+ rela = BFD_RELOC_MSP430_10_PCREL;
+ break;
+
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_UNDEF):
+ /* Convert uncond branch jmp lab -> br lab. */
+ if (target_is_430x ())
+ cc = msp430x_rcodes + 7;
+ else
+ cc = msp430_rcodes + 7;
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 2;
+ break;
+
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_UNDEF):
+ {
+ /* Other simple branches. */
+ int insn = bfd_getl16 (fragP->fr_opcode);
+
+ insn &= 0xffff;
+ /* Find actual instruction. */
+ if (target_is_430x ())
+ {
+ for (i = 0; i < 7 && !cc; i++)
+ if (msp430x_rcodes[i].sop == insn)
+ cc = msp430x_rcodes + i;
+ }
+ else
+ {
+ for (i = 0; i < 7 && !cc; i++)
+ if (msp430_rcodes[i].sop == insn)
+ cc = & msp430_rcodes[i];
+ }
+
+ if (!cc || !cc->name)
+ as_fatal (_("internal inconsistency problem in %s: insn %04lx"),
+ __FUNCTION__, (long) insn);
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ bfd_putl16 (cc->lop1, where + 2);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 4;
+ }
+ break;
+
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_UNDEF):
+ if (target_is_430x ())
+ cc = msp430x_rcodes + 6;
+ else
+ cc = msp430_rcodes + 6;
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ bfd_putl16 (cc->lop1, where + 2);
+ bfd_putl16 (cc->lop2, where + 4);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 6;
+ break;
+
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10):
+ {
+ int insn = bfd_getl16 (fragP->fr_opcode + 2);
+
+ insn &= 0xffff;
+ if (target_is_430x ())
+ {
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430x_hcodes[i].op1 == insn)
+ hc = msp430x_hcodes + i;
+ }
+ else
+ {
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430_hcodes[i].op1 == insn)
+ hc = &msp430_hcodes[i];
+ }
+ if (!hc || !hc->name)
+ as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"),
+ __FUNCTION__, (long) insn);
+ rela = BFD_RELOC_MSP430_10_PCREL;
+ /* Apply a fix for a first label if necessary.
+ another fix will be applied to the next word of insn anyway. */
+ if (hc->tlab == 2)
+ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
+ fragP->fr_offset, TRUE, rela);
+ fragP->fr_fix += 2;
+ }
+
+ break;
+
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_UNDEF):
+ {
+ int insn = bfd_getl16 (fragP->fr_opcode + 2);
+
+ insn &= 0xffff;
+ if (target_is_430x ())
+ {
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430x_hcodes[i].op1 == insn)
+ hc = msp430x_hcodes + i;
+ }
+ else
+ {
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430_hcodes[i].op1 == insn)
+ hc = & msp430_hcodes[i];
+ }
+ if (!hc || !hc->name)
+ as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"),
+ __FUNCTION__, (long) insn);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (hc->lop0, where);
+ bfd_putl16 (hc->lop1, where + 2);
+ bfd_putl16 (hc->lop2, where + 4);
+ fragP->fr_fix += 6;
+ }
+ break;
+
+ default:
+ as_fatal (_("internal inconsistency problem in %s: %lx"),
+ __FUNCTION__, (long) fragP->fr_subtype);
+ break;
+ }
+
+ /* Now apply fix. */
+ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
+ fragP->fr_offset, TRUE, rela);
+ /* Just fixed 2 bytes. */
+ fragP->fr_fix += 2;
}
+/* Relax fragment. Mostly stolen from hc11 and mcore
+ which arches I think I know. */
-int
-md_estimate_size_before_relax (fragp, seg)
- fragS *fragp ATTRIBUTE_UNUSED;
- asection *seg ATTRIBUTE_UNUSED;
+long
+msp430_relax_frag (segT seg ATTRIBUTE_UNUSED, fragS * fragP,
+ long stretch ATTRIBUTE_UNUSED)
{
- abort ();
- return 0;
+ long growth;
+ offsetT aim = 0;
+ symbolS *symbolP;
+ const relax_typeS *this_type;
+ const relax_typeS *start_type;
+ relax_substateT next_state;
+ relax_substateT this_state;
+ const relax_typeS *table = md_relax_table;
+
+ /* Nothing to be done if the frag has already max size. */
+ if (RELAX_STATE (fragP->fr_subtype) == STATE_UNDEF
+ || RELAX_STATE (fragP->fr_subtype) == STATE_WORD)
+ return 0;
+
+ if (RELAX_STATE (fragP->fr_subtype) == STATE_BITS10)
+ {
+ symbolP = fragP->fr_symbol;
+ if (symbol_resolved_p (symbolP))
+ as_fatal (_("internal inconsistency problem in %s: resolved symbol"),
+ __FUNCTION__);
+ /* We know the offset. calculate a distance. */
+ aim = S_GET_VALUE (symbolP) - fragP->fr_address - fragP->fr_fix;
+ }
+
+ if (!msp430_enable_relax)
+ {
+ /* Relaxation is not enabled. So, make all jump as long ones
+ by setting 'aim' to quite high value. */
+ aim = 0x7fff;
+ }
+
+ this_state = fragP->fr_subtype;
+ start_type = this_type = table + this_state;
+
+ if (aim < 0)
+ {
+ /* Look backwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim >= this_type->rlx_backward || !this_type->rlx_backward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+ else
+ {
+ /* Look forwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim <= this_type->rlx_forward || !this_type->rlx_forward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+
+ growth = this_type->rlx_length - start_type->rlx_length;
+ if (growth != 0)
+ fragP->fr_subtype = this_state;
+ return growth;
+}
+
+/* Return FALSE if the fixup in fixp should be left alone and not
+ adjusted. We return FALSE here so that linker relaxation will
+ work. */
+
+bfd_boolean
+msp430_fix_adjustable (struct fix *fixp ATTRIBUTE_UNUSED)
+{
+ /* If the symbol is in a non-code section then it should be OK. */
+ if (fixp->fx_addsy
+ && ((S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_CODE) == 0))
+ return TRUE;
+
+ return FALSE;
+}
+
+/* Set the contents of the .MSP430.attributes section. */
+
+void
+msp430_md_end (void)
+{
+ if (check_for_nop == TRUE && warn_interrupt_nops)
+ as_warn ("assembly finished with the last instruction changing interrupt state - a NOP might be needed");
+
+ bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_ISA,
+ target_is_430x () ? 2 : 1);
+
+ bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_Code_Model,
+ large_model ? 2 : 1);
+
+ bfd_elf_add_proc_attr_int (stdoutput, OFBA_MSPABI_Tag_Data_Model,
+ large_model ? 2 : 1);
+}
+
+/* Returns FALSE if there is a msp430 specific reason why the
+ subtraction of two same-section symbols cannot be computed by
+ the assembler. */
+
+bfd_boolean
+msp430_allow_local_subtract (expressionS * left,
+ expressionS * right,
+ segT section)
+{
+ /* If the symbols are not in a code section then they are OK. */
+ if ((section->flags & SEC_CODE) == 0)
+ return TRUE;
+
+ if (S_IS_GAS_LOCAL (left->X_add_symbol) || S_IS_GAS_LOCAL (right->X_add_symbol))
+ return TRUE;
+
+ if (left->X_add_symbol == right->X_add_symbol)
+ return TRUE;
+
+ /* We have to assume that there may be instructions between the
+ two symbols and that relaxation may increase the distance between
+ them. */
+ return FALSE;
}
projects / platform / upstream / binutils.git / blobdiff