From 27fd2f5070b82e3e58fa709ff3d4479d4c5713db Mon Sep 17 00:00:00 2001 From: Qinwei Date: Thu, 4 Jan 2007 07:09:54 +0000 Subject: [PATCH] 2007-01-04 Qinwei * NEWS: New port to S+core. * MAINTAINERS (Write After Approval, Responsible Maintainers): Add myself. * Makefile.in: Add dependencies for S+core files. * configure.tgt (score*, score-*-*): Add S+core target. * config/score/embed.mt: New file. * score-tdep.c: New file. * score-tdep.h: New file. --- gdb/ChangeLog | 12 + gdb/MAINTAINERS | 4 + gdb/Makefile.in | 6 + gdb/configure.tgt | 2 + gdb/score-tdep.c | 906 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ gdb/score-tdep.h | 51 +++ 6 files changed, 981 insertions(+) create mode 100644 gdb/score-tdep.c create mode 100644 gdb/score-tdep.h diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 7f47dab..9851106 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,15 @@ +2007-01-04 Qinwei + + * NEWS: New port to S+core. + * MAINTAINERS (Write After Approval, Responsible Maintainers): + Add myself. + + * Makefile.in: Add dependencies for S+core files. + * configure.tgt (score*, score-*-*): Add S+core target. + * config/score/embed.mt: New file. + * score-tdep.c: New file. + * score-tdep.h: New file. + 2007-01-04 Joel Brobecker * ada-lang.c (ada_evaluate_subexp) [OP_TYPE]: Return a value with diff --git a/gdb/MAINTAINERS b/gdb/MAINTAINERS index a0b33ad..58dfe10 100644 --- a/gdb/MAINTAINERS +++ b/gdb/MAINTAINERS @@ -301,6 +301,9 @@ the native maintainer when resolving ABI issues. s390 --target=s390-linux-gnu ,-Werror + score --target=score-elf + Qinwei qinwei@sunnorth.com.cn + sh --target=sh-elf ,-Werror --target=sh64-elf ,-Werror @@ -525,6 +528,7 @@ Hans-Peter Nilsson hp@bitrange.com David O'Brien obrien@freebsd.org Alexandre Oliva aoliva@redhat.com Vladimir Prus vladimir@codesourcery.com +Qinwei qinwei@sunnorth.com.cn Ramana Radhakrishnan ramana.radhakrishnan@codito.com Frederic Riss frederic.riss@st.com Tom Rix trix@redhat.com diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 361297d..d03fa06 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -783,6 +783,7 @@ rs6000_tdep_h = rs6000-tdep.h $(defs_h) s390_tdep_h = s390-tdep.h scm_lang_h = scm-lang.h $(scm_tags_h) scm_tags_h = scm-tags.h +score_tdep_h = score-tdep.h sentinel_frame_h = sentinel-frame.h serial_h = serial.h ser_base_h = ser-base.h @@ -1491,6 +1492,7 @@ ALLDEPFILES = \ remote-st.c remote-utils.c dcache.c \ rs6000-nat.c rs6000-tdep.c \ s390-tdep.c s390-nat.c \ + score-tdep.c \ ser-go32.c ser-pipe.c ser-tcp.c ser-mingw.c \ sh-tdep.c sh64-tdep.c shnbsd-tdep.c shnbsd-nat.c \ sol2-tdep.c \ @@ -2568,6 +2570,10 @@ scm-lang.o: scm-lang.c $(defs_h) $(symtab_h) $(gdbtypes_h) $(expression_h) \ scm-valprint.o: scm-valprint.c $(defs_h) $(symtab_h) $(gdbtypes_h) \ $(expression_h) $(parser_defs_h) $(language_h) $(value_h) \ $(scm_lang_h) $(valprint_h) $(gdbcore_h) $(c_lang_h) +score-tdep.o: score-tdep.c $(defs_h) $(gdb_assert_h) $(inferior_h) \ + $(symtab_h) $(objfiles_h) $(gdbcore_h) $(target_h) \ + $(arch_utils_h) $(regcache_h) $(dis_asm_h) $(frame_unwind_h) \ + $(frame_base_h) $(trad_frame_h) $(dwarf2_frame_h) $(score_tdep_h) sentinel-frame.o: sentinel-frame.c $(defs_h) $(regcache_h) \ $(sentinel_frame_h) $(inferior_h) $(frame_unwind_h) ser-e7kpc.o: ser-e7kpc.c $(defs_h) $(serial_h) $(gdb_string_h) diff --git a/gdb/configure.tgt b/gdb/configure.tgt index a9e657f..3682b46 100644 --- a/gdb/configure.tgt +++ b/gdb/configure.tgt @@ -24,6 +24,7 @@ powerpc*) gdb_target_cpu=powerpc ;; sparc*) gdb_target_cpu=sparc ;; thumb*) gdb_target_cpu=arm ;; s390*) gdb_target_cpu=s390 ;; +score*) gdb_target_cpu=score ;; sh*) gdb_target_cpu=sh ;; spu*) gdb_target_cpu=spu ;; strongarm*) gdb_target_cpu=arm ;; @@ -179,6 +180,7 @@ s390*-*-*) gdb_target=s390 build_gdbserver=yes ;; +score-*-*) gdb_target=embed ;; sh*-*-pe) gdb_target=wince ;; sh-*-coff*) gdb_target=embed ;; sh-*-elf*) gdb_target=embed ;; diff --git a/gdb/score-tdep.c b/gdb/score-tdep.c new file mode 100644 index 0000000..dd8cb49 --- /dev/null +++ b/gdb/score-tdep.c @@ -0,0 +1,906 @@ +/* Target-dependent code for the S+core architecture, for GDB, + the GNU Debugger. + + Copyright (C) 2006 + Free Software Foundation, Inc. + + Contributed by Qinwei (qinwei@sunnorth.com.cn) + Contributed by Ching-Peng Lin (cplin@sunplus.com) + + This file is part of GDB. + + This program 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 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#include "defs.h" +#include "gdb_assert.h" +#include "inferior.h" +#include "symtab.h" +#include "objfiles.h" +#include "gdbcore.h" +#include "target.h" +#include "arch-utils.h" +#include "regcache.h" +#include "dis-asm.h" +#include "frame-unwind.h" +#include "frame-base.h" +#include "trad-frame.h" +#include "dwarf2-frame.h" +#include "score-tdep.h" + +#define G_FLD(_i,_ms,_ls) (((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls))) +#define RM_PBITS(_raw) ((G_FLD(_raw, 31, 16) << 15) | G_FLD(_raw, 14, 0)) + +typedef struct{ + unsigned int v; + unsigned int raw; + char is15; +}inst_t; + +struct score_frame_cache +{ + CORE_ADDR base; + struct trad_frame_saved_reg *saved_regs; +}; + +#if 0 +/* If S+core GCC will generate these instructions in the prologue: + + lw rx, imm1 + addi rx, -imm2 + mv! r2, rx + + then .pdr section is used. */ + +#define P_SIZE 8 +#define PI_SYM 0 +#define PI_R_MSK 1 +#define PI_R_OFF 2 +#define PI_R_LEF 4 +#define PI_F_OFF 5 +#define PI_F_REG 6 +#define PI_RAREG 7 + +typedef struct frame_extra_info +{ + CORE_ADDR p_frame; + unsigned int pdr[P_SIZE]; +} extra_info_t; + +struct obj_priv +{ + bfd_size_type size; + char *contents; +}; + +static bfd *the_bfd; + +static int +score_compare_pdr_entries (const void *a, const void *b) +{ + CORE_ADDR lhs = bfd_get_32 (the_bfd, (bfd_byte *) a); + CORE_ADDR rhs = bfd_get_32 (the_bfd, (bfd_byte *) b); + if (lhs < rhs) + return -1; + else if (lhs == rhs) + return 0; + else + return 1; +} + +static void +score_analyze_pdr_section (CORE_ADDR startaddr, CORE_ADDR pc, + struct frame_info *next_frame, + struct score_frame_cache *this_cache) +{ + struct symbol *sym; + struct obj_section *sec; + extra_info_t *fci_ext; + CORE_ADDR leaf_ra_stack_addr = -1; + + gdb_assert (startaddr <= pc); + gdb_assert (this_cache != NULL); + + fci_ext = frame_obstack_zalloc (sizeof (extra_info_t)); + if ((sec = find_pc_section (pc)) == NULL) + { + error ("Can't find section in file:%s, line:%d!", __FILE__, __LINE__); + return; + } + + /* Anylyze .pdr section and get coresponding fields. */ + { + static struct obj_priv *priv = NULL; + + if (priv == NULL) + { + asection *bfdsec; + priv = obstack_alloc (&sec->objfile->objfile_obstack, + sizeof (struct obj_priv)); + if ((bfdsec = bfd_get_section_by_name (sec->objfile->obfd, ".pdr"))) + { + priv->size = bfd_section_size (sec->objfile->obfd, bfdsec); + priv->contents = obstack_alloc (&sec->objfile->objfile_obstack, + priv->size); + bfd_get_section_contents (sec->objfile->obfd, bfdsec, + priv->contents, 0, priv->size); + the_bfd = sec->objfile->obfd; + qsort (priv->contents, priv->size / 32, 32, + score_compare_pdr_entries); + the_bfd = NULL; + } + else + priv->size = 0; + } + if (priv->size != 0) + { + int low = 0, mid, high = priv->size / 32; + char *ptr; + do + + { + CORE_ADDR pdr_pc; + mid = (low + high) / 2; + ptr = priv->contents + mid * 32; + pdr_pc = bfd_get_signed_32 (sec->objfile->obfd, ptr); + pdr_pc += ANOFFSET (sec->objfile->section_offsets, + SECT_OFF_TEXT (sec->objfile)); + if (pdr_pc == startaddr) + break; + if (pdr_pc > startaddr) + high = mid; + else + low = mid + 1; + } + while (low != high); + + if (low != high) + { + gdb_assert (bfd_get_32 (sec->objfile->obfd, ptr) == startaddr); +#define EXT_PDR(_pi) bfd_get_32(sec->objfile->obfd, ptr+((_pi)<<2)) + fci_ext->pdr[PI_SYM] = EXT_PDR (PI_SYM); + fci_ext->pdr[PI_R_MSK] = EXT_PDR (PI_R_MSK); + fci_ext->pdr[PI_R_OFF] = EXT_PDR (PI_R_OFF); + fci_ext->pdr[PI_R_LEF] = EXT_PDR (PI_R_LEF); + fci_ext->pdr[PI_F_OFF] = EXT_PDR (PI_F_OFF); + fci_ext->pdr[PI_F_REG] = EXT_PDR (PI_F_REG); + fci_ext->pdr[PI_RAREG] = EXT_PDR (PI_RAREG); +#undef EXT_PDR + } + } + } +} +#endif + +static struct type * +score_register_type (struct gdbarch *gdbarch, int regnum) +{ + gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS); + return builtin_type_uint32; +} + +static LONGEST +score_read_unsigned_register (int regnum) +{ + LONGEST val; + regcache_cooked_read_unsigned (current_regcache, regnum, &val); + return val; +} + +static CORE_ADDR +score_read_sp (void) +{ + return score_read_unsigned_register (SCORE_SP_REGNUM); +} + +static CORE_ADDR +score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) +{ + return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM); +} + +static const char * +score_register_name (int regnum) +{ + const char *score_register_names[] = { + "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", + "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", + "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", + + "PSR", "COND", "ECR", "EXCPVEC", + "CCR", "EPC", "EMA", "TLBLOCK", + "TLBPT", "PEADDR", "TLBRPT", "PEVN", + "PECTX", "LIMPFN", "LDMPFN", "PREV", + "DREG", "PC", "DSAVE", "COUNTER", + "LDCR", "STCR", "CEH", "CEL", + }; + + gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS); + return score_register_names[regnum]; +} + +static int +score_register_sim_regno (int regnum) +{ + gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS); + return regnum; +} + +static int +score_print_insn (bfd_vma memaddr, struct disassemble_info *info) +{ + if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) + return print_insn_big_score (memaddr, info); + else + return print_insn_little_score (memaddr, info); +} + +static const gdb_byte * +score_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) +{ + gdb_byte buf[SCORE_INSTLEN] = { 0 }; + int ret; + unsigned int raw; + + if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0) + { + memory_error (ret, *pcptr); + } + raw = extract_unsigned_integer (buf, SCORE_INSTLEN); + + if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) + { + if (!(raw & 0x80008000)) + { + /* 16bits instruction. */ + static gdb_byte big_breakpoint16[] = { 0x60, 0x02 }; + *pcptr &= ~0x1; + *lenptr = sizeof (big_breakpoint16); + return big_breakpoint16; + } + else + { + /* 32bits instruction. */ + static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 }; + *pcptr &= ~0x3; + *lenptr = sizeof (big_breakpoint32); + return big_breakpoint32; + } + } + else + { + if (!(raw & 0x80008000)) + { + /* 16bits instruction. */ + static gdb_byte little_breakpoint16[] = { 0x02, 0x60 }; + *pcptr &= ~0x1; + *lenptr = sizeof (little_breakpoint16); + return little_breakpoint16; + } + else + { + /* 32bits instruction. */ + static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 }; + *pcptr &= ~0x3; + *lenptr = sizeof (little_breakpoint32); + return little_breakpoint32; + } + } +} + +static CORE_ADDR +score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) +{ + return align_down (addr, 16); +} + +static void +score_xfer_register (struct regcache *regcache, int regnum, int length, + enum bfd_endian endian, gdb_byte *readbuf, + const gdb_byte *writebuf, int buf_offset) +{ + int reg_offset = 0; + gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS); + + switch (endian) + { + case BFD_ENDIAN_BIG: + reg_offset = SCORE_REGSIZE - length; + break; + case BFD_ENDIAN_LITTLE: + reg_offset = 0; + break; + case BFD_ENDIAN_UNKNOWN: + reg_offset = 0; + break; + default: + internal_error (__FILE__, __LINE__, _("score_xfer_register error!")); + } + + if (readbuf != NULL) + regcache_cooked_read_part (regcache, regnum, reg_offset, length, + readbuf + buf_offset); + if (writebuf != NULL) + regcache_cooked_write_part (regcache, regnum, reg_offset, length, + writebuf + buf_offset); +} + +static enum return_value_convention +score_return_value (struct gdbarch *gdbarch, struct type *type, + struct regcache *regcache, + gdb_byte * readbuf, const gdb_byte * writebuf) +{ + if (TYPE_CODE (type) == TYPE_CODE_STRUCT + || TYPE_CODE (type) == TYPE_CODE_UNION + || TYPE_CODE (type) == TYPE_CODE_ARRAY) + return RETURN_VALUE_STRUCT_CONVENTION; + else + { + int offset; + int regnum; + for (offset = 0, regnum = SCORE_A0_REGNUM; + offset < TYPE_LENGTH (type); + offset += SCORE_REGSIZE, regnum++) + { + int xfer = SCORE_REGSIZE; + if (offset + xfer > TYPE_LENGTH (type)) + xfer = TYPE_LENGTH (type) - offset; + score_xfer_register (regcache, regnum, xfer, TARGET_BYTE_ORDER, + readbuf, writebuf, offset); + } + return RETURN_VALUE_REGISTER_CONVENTION; + } +} + +static struct frame_id +score_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) +{ + return frame_id_build ( + frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM), + frame_pc_unwind (next_frame)); +} + +static int +score_type_needs_double_align (struct type *type) +{ + enum type_code typecode = TYPE_CODE (type); + + if (typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8) + return 1; + if (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8) + return 1; + else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION) + { + int i, n; + + n = TYPE_NFIELDS (type); + for (i = 0; i < n; i++) + if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i))) + return 1; + return 0; + } + return 0; +} + +static CORE_ADDR +score_push_dummy_call (struct gdbarch *gdbarch, struct value *function, + struct regcache *regcache, CORE_ADDR bp_addr, + int nargs, struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + int argnum; + int argreg; + int arglen = 0; + CORE_ADDR stack_offset = 0; + CORE_ADDR addr = 0; + + /* Step 1, Save RA. */ + regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr); + + /* Step 2, Make space on the stack for the args. */ + struct_addr = align_down (struct_addr, 16); + sp = align_down (sp, 16); + for (argnum = 0; argnum < nargs; argnum++) + arglen += align_up (TYPE_LENGTH (value_type (args[argnum])), + SCORE_REGSIZE); + sp -= align_up (arglen, 16); + + argreg = SCORE_BEGIN_ARG_REGNUM; + + /* Step 3, Check if struct return then save the struct address to r4 and + increase the stack_offset by 4. */ + if (struct_return) + { + regcache_cooked_write_unsigned (regcache, argreg++, struct_addr); + stack_offset += SCORE_REGSIZE; + } + + /* Step 4, Load arguments: + If arg length is too long (> 4 bytes), + then split the arg and save every parts. */ + for (argnum = 0; argnum < nargs; argnum++) + { + struct value *arg = args[argnum]; + struct type *arg_type = check_typedef (value_type (arg)); + arglen = TYPE_LENGTH (arg_type); + enum type_code typecode = TYPE_CODE (arg_type); + const gdb_byte *val = value_contents (arg); + int downward_offset = 0; + + int odd_sized_struct_p = (arglen > SCORE_REGSIZE + && arglen % SCORE_REGSIZE != 0); + int arg_last_part_p = 0; + + /* If a arg should be aligned to 8 bytes (long long or double), + the value should be put to even register numbers. */ + if (score_type_needs_double_align (arg_type)) + { + if (argreg & 1) + argreg++; + } + + /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose + the default "downward"/"upward" method: + + Example: + + struct struc + { + char a; char b; char c; + } s = {'a', 'b', 'c'}; + + Big endian: s = {X, 'a', 'b', 'c'} + Little endian: s = {'a', 'b', 'c', X} + + Where X is a hole. */ + + if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG + && (typecode == TYPE_CODE_STRUCT + || typecode == TYPE_CODE_UNION) + && argreg > SCORE_LAST_ARG_REGNUM + && arglen < SCORE_REGSIZE) + downward_offset += (SCORE_REGSIZE - arglen); + + while (arglen > 0) + { + int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE; + ULONGEST regval = extract_unsigned_integer (val, partial_len); + + /* The last part of a arg should shift left when + TARGET_BYTE_ORDER is BFD_ENDIAN_BIG. */ + if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG + && arg_last_part_p == 1 + && (typecode == TYPE_CODE_STRUCT + || typecode == TYPE_CODE_UNION)) + regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT); + + /* Always increase the stack_offset and save args to stack. */ + addr = sp + stack_offset + downward_offset; + write_memory (addr, val, partial_len); + + if (argreg <= SCORE_LAST_ARG_REGNUM) + { + regcache_cooked_write_unsigned (regcache, argreg++, regval); + if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2) + arg_last_part_p = 1; + } + + val += partial_len; + arglen -= partial_len; + stack_offset += align_up (partial_len, SCORE_REGSIZE); + } + } + + /* Step 5, Save SP. */ + regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp); + + return sp; +} + +static inst_t * +score_fetch_instruction (CORE_ADDR addr) +{ + static inst_t inst = { 0, 0 }; + char buf[SCORE_INSTLEN]; + int big; + int ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN); + unsigned int raw; + + if (ret) + { + memory_error (ret, addr); + return 0; + } + inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN); + inst.is15 = !(inst.raw & 0x80008000); + inst.v = RM_PBITS (inst.raw); + big = (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG); + + if (inst.is15) + { + if (big ^ ((addr & 0x2) == 2)) + inst.v = G_FLD (inst.v, 29, 15); + else + inst.v = G_FLD (inst.v, 14, 0); + } + return &inst; +} + +static CORE_ADDR +score_skip_prologue (CORE_ADDR pc) +{ + CORE_ADDR cpc = pc; + int iscan = 32, stack_sub = 0; + while (iscan-- > 0) + { + inst_t *inst = score_fetch_instruction (cpc); + if (!inst) + break; + if (!inst->is15 && !stack_sub + && (G_FLD (inst->v, 29, 25) == 0x1 + && G_FLD (inst->v, 24, 20) == 0x0)) + { + /* addi r0, offset */ + pc = stack_sub = cpc + SCORE_INSTLEN; + } + else if (!inst->is15 + && inst->v == RM_PBITS (0x8040bc56)) + { + /* mv r2, r0 */ + pc = cpc + SCORE_INSTLEN; + break; + } + else if (inst->is15 + && inst->v == RM_PBITS (0x0203)) + { + /* mv! r2, r0 */ + pc = cpc + SCORE16_INSTLEN; + break; + } + else if (inst->is15 + && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */ + || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */ + || (G_FLD (inst->v, 14, 12) == 0x0 + && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */ + break; + else if (!inst->is15 + && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */ + || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */ + || (G_FLD (inst->v, 29, 25) == 0x0 + && G_FLD (inst->v, 6, 1) == 0x4))) /* br */ + break; + + cpc += inst->is15 ? SCORE16_INSTLEN : SCORE_INSTLEN; + } + return pc; +} + +static int +score_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc) +{ + inst_t *inst = score_fetch_instruction (cur_pc); + + if (inst->v == 0x23) + return 1; /* mv! r0, r2 */ + else if (G_FLD (inst->v, 14, 12) == 0x2 + && G_FLD (inst->v, 3, 0) == 0xa) + return 1; /* pop! */ + else if (G_FLD (inst->v, 14, 12) == 0x0 + && G_FLD (inst->v, 7, 0) == 0x34) + return 1; /* br! r3 */ + else if (G_FLD (inst->v, 29, 15) == 0x2 + && G_FLD (inst->v, 6, 1) == 0x2b) + return 1; /* mv r0, r2 */ + else if (G_FLD (inst->v, 29, 25) == 0x0 + && G_FLD (inst->v, 6, 1) == 0x4 + && G_FLD (inst->v, 19, 15) == 0x3) + return 1; /* br r3 */ + else + return 0; +} + +static void +score_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc, + struct frame_info *next_frame, + struct score_frame_cache *this_cache) +{ + CORE_ADDR sp; + CORE_ADDR cur_pc = startaddr; + + int sp_offset = 0; + int ra_offset = 0; + int fp_offset = 0; + int ra_offset_p = 0; + int fp_offset_p = 0; + int inst_len = 0; + + sp = frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM); + + for (; cur_pc < pc; cur_pc += inst_len) + { + inst_t *inst = score_fetch_instruction (cur_pc); + if (inst->is15 == 1) + { + inst_len = SCORE16_INSTLEN; + + if (G_FLD (inst->v, 14, 12) == 0x2 + && G_FLD (inst->v, 3, 0) == 0xe) + { + /* push! */ + sp_offset += 4; + + if (G_FLD (inst->v, 11, 7) == 0x6 + && ra_offset_p == 0) + { + /* push! r3, [r0] */ + ra_offset = sp_offset; + ra_offset_p = 1; + } + else if (G_FLD (inst->v, 11, 7) == 0x4 + && fp_offset_p == 0) + { + /* push! r2, [r0] */ + fp_offset = sp_offset; + fp_offset_p = 1; + } + } + else if (G_FLD (inst->v, 14, 12) == 0x2 + && G_FLD (inst->v, 3, 0) == 0xa) + { + /* pop! */ + sp_offset -= 4; + } + else if (G_FLD (inst->v, 14, 7) == 0xc1 + && G_FLD (inst->v, 2, 0) == 0x0) + { + /* subei! r0, n */ + sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3)); + } + else if (G_FLD (inst->v, 14, 7) == 0xc0 + && G_FLD (inst->v, 2, 0) == 0x0) + { + /* addei! r0, n */ + sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3)); + } + } + else + { + inst_len = SCORE_INSTLEN; + + if (G_FLD (inst->v, 29, 15) == 0xc60 + && G_FLD (inst->v, 2, 0) == 0x4) + { + /* sw r3, [r0, offset]+ */ + sp_offset += SCORE_INSTLEN; + if (ra_offset_p == 0) + { + ra_offset = sp_offset; + ra_offset_p = 1; + } + } + if (G_FLD (inst->v, 29, 15) == 0xc40 + && G_FLD (inst->v, 2, 0) == 0x4) + { + /* sw r2, [r0, offset]+ */ + sp_offset += SCORE_INSTLEN; + if (fp_offset_p == 0) + { + fp_offset = sp_offset; + fp_offset_p = 1; + } + } + else if (G_FLD (inst->v, 29, 15) == 0x1c60 + && G_FLD (inst->v, 2, 0) == 0x0) + { + /* lw r3, [r0]+, 4 */ + sp_offset -= SCORE_INSTLEN; + ra_offset_p = 1; + } + else if (G_FLD (inst->v, 29, 15) == 0x1c40 + && G_FLD (inst->v, 2, 0) == 0x0) + { + /* lw r2, [r0]+, 4 */ + sp_offset -= SCORE_INSTLEN; + fp_offset_p = 1; + } + + else if (G_FLD (inst->v, 29, 17) == 0x100 + && G_FLD (inst->v, 0, 0) == 0x0) + { + /* addi r0, -offset */ + sp_offset += 65536 - G_FLD (inst->v, 16, 1); + } + else if (G_FLD (inst->v, 29, 17) == 0x110 + && G_FLD (inst->v, 0, 0) == 0x0) + { + /* addi r2, offset */ + if (pc - cur_pc > 4) + { + unsigned int save_v = inst->v; + inst_t *inst2 = + score_fetch_instruction (cur_pc + SCORE_INSTLEN); + if (inst2->v == 0x23) + /* mv! r0, r2 */ + sp_offset -= G_FLD (save_v, 16, 1); + } + } + } + } + + /* Save RA. */ + if (ra_offset_p == 1) + { + if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1) + this_cache->saved_regs[SCORE_PC_REGNUM].addr = + sp + sp_offset - ra_offset; + } + else + { + this_cache->saved_regs[SCORE_PC_REGNUM] = + this_cache->saved_regs[SCORE_RA_REGNUM]; + } + + /* Save FP. */ + if (fp_offset_p == 1) + { + if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1) + this_cache->saved_regs[SCORE_FP_REGNUM].addr = + sp + sp_offset - fp_offset; + } + + /* Save SP. */ + this_cache->base = + frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM) + sp_offset; +} + +static struct score_frame_cache * +score_make_prologue_cache (struct frame_info *next_frame, void **this_cache) +{ + struct score_frame_cache *cache; + + if ((*this_cache) != NULL) + return (*this_cache); + + cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache); + (*this_cache) = cache; + cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); + + /* Analyze the prologue. */ + { + const CORE_ADDR pc = frame_pc_unwind (next_frame); + CORE_ADDR start_addr; + + find_pc_partial_function (pc, NULL, &start_addr, NULL); + if (start_addr == 0) + return cache; + score_analyze_prologue (start_addr, pc, next_frame, *this_cache); + } + + /* Save SP. */ + trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base); + + return (*this_cache); +} + +static void +score_prologue_this_id (struct frame_info *next_frame, void **this_cache, + struct frame_id *this_id) +{ + struct score_frame_cache *info = score_make_prologue_cache (next_frame, + this_cache); + (*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame)); +} + +static void +score_prologue_prev_register (struct frame_info *next_frame, + void **this_cache, + int regnum, int *optimizedp, + enum lval_type *lvalp, CORE_ADDR * addrp, + int *realnump, gdb_byte * valuep) +{ + struct score_frame_cache *info = score_make_prologue_cache (next_frame, + this_cache); + trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, + optimizedp, lvalp, addrp, realnump, valuep); +} + +static const struct frame_unwind score_prologue_unwind = +{ + NORMAL_FRAME, + score_prologue_this_id, + score_prologue_prev_register +}; + +static const struct frame_unwind * +score_prologue_sniffer (struct frame_info *next_frame) +{ + return &score_prologue_unwind; +} + +static CORE_ADDR +score_prologue_frame_base_address (struct frame_info *next_frame, + void **this_cache) +{ + struct score_frame_cache *info = + score_make_prologue_cache (next_frame, this_cache); + return info->base; +} + +static const struct frame_base score_prologue_frame_base = +{ + &score_prologue_unwind, + score_prologue_frame_base_address, + score_prologue_frame_base_address, + score_prologue_frame_base_address, +}; + +static const struct frame_base * +score_prologue_frame_base_sniffer (struct frame_info *next_frame) +{ + return &score_prologue_frame_base; +} + +static struct gdbarch * +score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +{ + struct gdbarch *gdbarch; + + arches = gdbarch_list_lookup_by_info (arches, &info); + if (arches != NULL) + { + return (arches->gdbarch); + } + gdbarch = gdbarch_alloc (&info, 0); + + set_gdbarch_short_bit (gdbarch, 16); + set_gdbarch_int_bit (gdbarch, 32); + set_gdbarch_float_bit (gdbarch, 32); + set_gdbarch_double_bit (gdbarch, 64); + set_gdbarch_long_double_bit (gdbarch, 64); + set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno); + set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM); + set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM); + set_gdbarch_num_regs (gdbarch, SCORE_NUM_REGS); + set_gdbarch_register_name (gdbarch, score_register_name); + set_gdbarch_breakpoint_from_pc (gdbarch, score_breakpoint_from_pc); + set_gdbarch_register_type (gdbarch, score_register_type); + set_gdbarch_frame_align (gdbarch, score_frame_align); + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + set_gdbarch_read_sp (gdbarch, score_read_sp); + set_gdbarch_unwind_pc (gdbarch, score_unwind_pc); + set_gdbarch_print_insn (gdbarch, score_print_insn); + set_gdbarch_skip_prologue (gdbarch, score_skip_prologue); + set_gdbarch_in_function_epilogue_p (gdbarch, score_in_function_epilogue_p); + set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); + set_gdbarch_return_value (gdbarch, score_return_value); + set_gdbarch_unwind_dummy_id (gdbarch, score_unwind_dummy_id); + set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call); + + frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); + frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer); + frame_unwind_append_sniffer (gdbarch, score_prologue_sniffer); + frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer); + + return gdbarch; +} + +extern initialize_file_ftype _initialize_score_tdep; + +void +_initialize_score_tdep (void) +{ + gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL); +} diff --git a/gdb/score-tdep.h b/gdb/score-tdep.h new file mode 100644 index 0000000..122e886 --- /dev/null +++ b/gdb/score-tdep.h @@ -0,0 +1,51 @@ +/* Target-dependent code for the S+core architecture, for GDB, + the GNU Debugger. + + Copyright (C) 2006 + Free Software Foundation, Inc. + + Contributed by Qinwei (qinwei@sunnorth.com.cn) + Contributed by Ching-Peng Lin (cplin@sunplus.com) + + This file is part of GDB. + + This program 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 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#ifndef SCORE_TDEP_H +#define SCORE_TDEP_H +#include "math.h" + +enum gdb_regnum +{ + SCORE_SP_REGNUM = 0, + SCORE_FP_REGNUM = 2, + SCORE_RA_REGNUM = 3, + SCORE_A0_REGNUM = 4, + SCORE_AL_REGNUM = 7, + SCORE_PC_REGNUM = 49, +}; + +#define SCORE_A0_REGNUM 4 +#define SCORE_A1_REGNUM 5 +#define SCORE_REGSIZE 4 +#define SCORE_NUM_REGS 56 +#define SCORE_BEGIN_ARG_REGNUM 4 +#define SCORE_LAST_ARG_REGNUM 7 + +#define SCORE_INSTLEN 4 +#define SCORE16_INSTLEN 2 + +#endif /* SCORE_TDEP_H */ -- 2.7.4