X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=opcodes%2Fvax-dis.c;h=5f9f1e96e557ad966ac3ee5ce36fae18c6a27752;hb=bd30b2c856c9ae1fc3559d80fc8c8ccdf65e5fce;hp=1300f54484dd700d293c6d5f9ee5e645fd6d7384;hpb=ec72cfe589400f06810a571ce4d7f45fb6e19621;p=platform%2Fupstream%2Fbinutils.git diff --git a/opcodes/vax-dis.c b/opcodes/vax-dis.c index 1300f54..5f9f1e9 100644 --- a/opcodes/vax-dis.c +++ b/opcodes/vax-dis.c @@ -1,36 +1,30 @@ /* Print VAX instructions. - Copyright 1995, 1998, 2000, 2001, 2002, 2005 - Free Software Foundation, Inc. + Copyright (C) 1995-2014 Free Software Foundation, Inc. Contributed by Pauline Middelink - This program is free software; you can redistribute it and/or modify + This file is part of the GNU opcodes library. + + This library 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. + the Free Software Foundation; either version 3, 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. + It 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ +#include "sysdep.h" #include #include -#include "sysdep.h" #include "opcode/vax.h" #include "dis-asm.h" -/* Local function prototypes */ -static int fetch_data PARAMS ((struct disassemble_info *, bfd_byte *)); -static int print_insn_arg - PARAMS ((const char *, unsigned char *, bfd_vma, disassemble_info *)); -static int print_insn_mode - PARAMS ((const char *, int, unsigned char *, bfd_vma, disassemble_info *)); - - static char *reg_names[] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", @@ -53,11 +47,7 @@ static char *entry_mask_bit[] = }; /* Sign-extend an (unsigned char). */ -#if __STDC__ == 1 #define COERCE_SIGNED_CHAR(ch) ((signed char)(ch)) -#else -#define COERCE_SIGNED_CHAR(ch) ((int)(((ch) ^ 0x80) & 0xFF) - 128) -#endif /* Get a 1 byte signed integer. */ #define NEXTBYTE(p) \ @@ -85,7 +75,7 @@ struct private bfd_byte * max_fetched; bfd_byte the_buffer[MAXLEN]; bfd_vma insn_start; - jmp_buf bailout; + OPCODES_SIGJMP_BUF bailout; }; /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) @@ -96,9 +86,7 @@ struct private ? 1 : fetch_data ((info), (addr))) static int -fetch_data (info, addr) - struct disassemble_info *info; - bfd_byte *addr; +fetch_data (struct disassemble_info *info, bfd_byte *addr) { int status; struct private *priv = (struct private *) info->private_data; @@ -111,7 +99,7 @@ fetch_data (info, addr) if (status != 0) { (*info->memory_error_func) (status, start, info); - longjmp (priv->bailout, 1); + OPCODES_SIGLONGJMP (priv->bailout, 1); } else priv->max_fetched = addr; @@ -182,21 +170,24 @@ free_entry_array (void) } } #endif -/* Check if the given address is a known function entry. Either there must - be a symbol of function type at this address, or the address must be - a forced entry point. The later helps in disassembling ROM images, because - there's no symbol table at all. Forced entry points can be given by - supplying several -M options to objdump: -M entry:0xffbb7730. */ +/* Check if the given address is a known function entry point. This is + the case if there is a symbol of the function type at this address. + We also check for synthetic symbols as these are used for PLT entries + (weak undefined symbols may not have the function type set). Finally + the address may have been forced to be treated as an entry point. The + latter helps in disassembling ROM images, because there's no symbol + table at all. Forced entry points can be given by supplying several + -M options to objdump: -M entry:0xffbb7730. */ static bfd_boolean is_function_entry (struct disassemble_info *info, bfd_vma addr) { unsigned int i; - /* Check if there's a BSF_FUNCTION symbol at our address. */ + /* Check if there's a function or PLT symbol at our address. */ if (info->symbols && info->symbols[0] - && (info->symbols[0]->flags & BSF_FUNCTION) + && (info->symbols[0]->flags & (BSF_FUNCTION | BSF_SYNTHETIC)) && addr == bfd_asymbol_value (info->symbols[0])) return TRUE; @@ -208,13 +199,181 @@ is_function_entry (struct disassemble_info *info, bfd_vma addr) return FALSE; } +/* Check if the given address is the last longword of a PLT entry. + This longword is data and depending on the value it may interfere + with disassembly of further PLT entries. We make use of the fact + PLT symbols are marked BSF_SYNTHETIC. */ +static bfd_boolean +is_plt_tail (struct disassemble_info *info, bfd_vma addr) +{ + if (info->symbols + && info->symbols[0] + && (info->symbols[0]->flags & BSF_SYNTHETIC) + && addr == bfd_asymbol_value (info->symbols[0]) + 8) + return TRUE; + + return FALSE; +} + +static int +print_insn_mode (const char *d, + int size, + unsigned char *p0, + bfd_vma addr, /* PC for this arg to be relative to. */ + disassemble_info *info) +{ + unsigned char *p = p0; + unsigned char mode, reg; + + /* Fetch and interpret mode byte. */ + mode = (unsigned char) NEXTBYTE (p); + reg = mode & 0xF; + switch (mode & 0xF0) + { + case 0x00: + case 0x10: + case 0x20: + case 0x30: /* Literal mode $number. */ + if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h') + (*info->fprintf_func) (info->stream, "$0x%x [%c-float]", mode, d[1]); + else + (*info->fprintf_func) (info->stream, "$0x%x", mode); + break; + case 0x40: /* Index: base-addr[Rn] */ + p += print_insn_mode (d, size, p0 + 1, addr + 1, info); + (*info->fprintf_func) (info->stream, "[%s]", reg_names[reg]); + break; + case 0x50: /* Register: Rn */ + (*info->fprintf_func) (info->stream, "%s", reg_names[reg]); + break; + case 0x60: /* Register deferred: (Rn) */ + (*info->fprintf_func) (info->stream, "(%s)", reg_names[reg]); + break; + case 0x70: /* Autodecrement: -(Rn) */ + (*info->fprintf_func) (info->stream, "-(%s)", reg_names[reg]); + break; + case 0x80: /* Autoincrement: (Rn)+ */ + if (reg == 0xF) + { /* Immediate? */ + int i; + + FETCH_DATA (info, p + size); + (*info->fprintf_func) (info->stream, "$0x"); + if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h') + { + int float_word; + + float_word = p[0] | (p[1] << 8); + if ((d[1] == 'd' || d[1] == 'f') + && (float_word & 0xff80) == 0x8000) + { + (*info->fprintf_func) (info->stream, "[invalid %c-float]", + d[1]); + } + else + { + for (i = 0; i < size; i++) + (*info->fprintf_func) (info->stream, "%02x", + p[size - i - 1]); + (*info->fprintf_func) (info->stream, " [%c-float]", d[1]); + } + } + else + { + for (i = 0; i < size; i++) + (*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]); + } + p += size; + } + else + (*info->fprintf_func) (info->stream, "(%s)+", reg_names[reg]); + break; + case 0x90: /* Autoincrement deferred: @(Rn)+ */ + if (reg == 0xF) + (*info->fprintf_func) (info->stream, "*0x%x", NEXTLONG (p)); + else + (*info->fprintf_func) (info->stream, "@(%s)+", reg_names[reg]); + break; + case 0xB0: /* Displacement byte deferred: *displ(Rn). */ + (*info->fprintf_func) (info->stream, "*"); + case 0xA0: /* Displacement byte: displ(Rn). */ + if (reg == 0xF) + (*info->print_address_func) (addr + 2 + NEXTBYTE (p), info); + else + (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTBYTE (p), + reg_names[reg]); + break; + case 0xD0: /* Displacement word deferred: *displ(Rn). */ + (*info->fprintf_func) (info->stream, "*"); + case 0xC0: /* Displacement word: displ(Rn). */ + if (reg == 0xF) + (*info->print_address_func) (addr + 3 + NEXTWORD (p), info); + else + (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTWORD (p), + reg_names[reg]); + break; + case 0xF0: /* Displacement long deferred: *displ(Rn). */ + (*info->fprintf_func) (info->stream, "*"); + case 0xE0: /* Displacement long: displ(Rn). */ + if (reg == 0xF) + (*info->print_address_func) (addr + 5 + NEXTLONG (p), info); + else + (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTLONG (p), + reg_names[reg]); + break; + } + + return p - p0; +} + +/* Returns number of bytes "eaten" by the operand, or return -1 if an + invalid operand was found, or -2 if an opcode tabel error was + found. */ + +static int +print_insn_arg (const char *d, + unsigned char *p0, + bfd_vma addr, /* PC for this arg to be relative to. */ + disassemble_info *info) +{ + int arg_len; + + /* Check validity of addressing length. */ + switch (d[1]) + { + case 'b' : arg_len = 1; break; + case 'd' : arg_len = 8; break; + case 'f' : arg_len = 4; break; + case 'g' : arg_len = 8; break; + case 'h' : arg_len = 16; break; + case 'l' : arg_len = 4; break; + case 'o' : arg_len = 16; break; + case 'w' : arg_len = 2; break; + case 'q' : arg_len = 8; break; + default : abort (); + } + + /* Branches have no mode byte. */ + if (d[0] == 'b') + { + unsigned char *p = p0; + + if (arg_len == 1) + (*info->print_address_func) (addr + 1 + NEXTBYTE (p), info); + else + (*info->print_address_func) (addr + 2 + NEXTWORD (p), info); + + return p - p0; + } + + return print_insn_mode (d, arg_len, p0, addr, info); +} + /* Print the vax instruction at address MEMADDR in debugged memory, on INFO->STREAM. Returns length of the instruction, in bytes. */ int -print_insn_vax (memaddr, info) - bfd_vma memaddr; - disassemble_info *info; +print_insn_vax (bfd_vma memaddr, disassemble_info *info) { static bfd_boolean parsed_disassembler_options = FALSE; const struct vot *votp; @@ -223,7 +382,7 @@ print_insn_vax (memaddr, info) struct private priv; bfd_byte *buffer = priv.the_buffer; - info->private_data = (PTR) &priv; + info->private_data = & priv; priv.max_fetched = priv.the_buffer; priv.insn_start = memaddr; @@ -236,11 +395,9 @@ print_insn_vax (memaddr, info) parsed_disassembler_options = TRUE; } - if (setjmp (priv.bailout) != 0) - { - /* Error return. */ - return -1; - } + if (OPCODES_SIGSETJMP (priv.bailout) != 0) + /* Error return. */ + return -1; argp = NULL; /* Check if the info buffer has more than one byte left since @@ -273,9 +430,21 @@ print_insn_vax (memaddr, info) return 2; } + /* Decode PLT entry offset longword. */ + if (is_plt_tail (info, memaddr)) + { + int offset; + + FETCH_DATA (info, buffer + 4); + offset = buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0]; + (*info->fprintf_func) (info->stream, ".long 0x%08x", offset); + + return 4; + } + for (votp = &votstrs[0]; votp->name[0]; votp++) { - register vax_opcodeT opcode = votp->detail.code; + vax_opcodeT opcode = votp->detail.code; /* 2 byte codes match 2 buffer pos. */ if ((bfd_byte) opcode == buffer[0] @@ -315,158 +484,3 @@ print_insn_vax (memaddr, info) return arg - buffer; } -/* Returns number of bytes "eaten" by the operand, or return -1 if an - invalid operand was found, or -2 if an opcode tabel error was - found. */ - -static int -print_insn_arg (d, p0, addr, info) - const char *d; - unsigned char *p0; - bfd_vma addr; /* PC for this arg to be relative to */ - disassemble_info *info; -{ - int arg_len; - - /* check validity of addressing length */ - switch (d[1]) - { - case 'b' : arg_len = 1; break; - case 'd' : arg_len = 8; break; - case 'f' : arg_len = 4; break; - case 'g' : arg_len = 8; break; - case 'h' : arg_len = 16; break; - case 'l' : arg_len = 4; break; - case 'o' : arg_len = 16; break; - case 'w' : arg_len = 2; break; - case 'q' : arg_len = 8; break; - default : abort(); - } - - /* branches have no mode byte */ - if (d[0] == 'b') - { - unsigned char *p = p0; - - if (arg_len == 1) - (*info->print_address_func) (addr + 1 + NEXTBYTE (p), info); - else - (*info->print_address_func) (addr + 2 + NEXTWORD (p), info); - - return p - p0; - } - - return print_insn_mode (d, arg_len, p0, addr, info); -} - -static int -print_insn_mode (d, size, p0, addr, info) - const char *d; - int size; - unsigned char *p0; - bfd_vma addr; /* PC for this arg to be relative to */ - disassemble_info *info; -{ - unsigned char *p = p0; - unsigned char mode, reg; - - /* fetch and interpret mode byte */ - mode = (unsigned char) NEXTBYTE (p); - reg = mode & 0xF; - switch (mode & 0xF0) - { - case 0x00: - case 0x10: - case 0x20: - case 0x30: /* literal mode $number */ - if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h') - (*info->fprintf_func) (info->stream, "$0x%x [%c-float]", mode, d[1]); - else - (*info->fprintf_func) (info->stream, "$0x%x", mode); - break; - case 0x40: /* index: base-addr[Rn] */ - p += print_insn_mode (d, size, p0 + 1, addr + 1, info); - (*info->fprintf_func) (info->stream, "[%s]", reg_names[reg]); - break; - case 0x50: /* register: Rn */ - (*info->fprintf_func) (info->stream, "%s", reg_names[reg]); - break; - case 0x60: /* register deferred: (Rn) */ - (*info->fprintf_func) (info->stream, "(%s)", reg_names[reg]); - break; - case 0x70: /* autodecrement: -(Rn) */ - (*info->fprintf_func) (info->stream, "-(%s)", reg_names[reg]); - break; - case 0x80: /* autoincrement: (Rn)+ */ - if (reg == 0xF) - { /* immediate? */ - int i; - - FETCH_DATA (info, p + size); - (*info->fprintf_func) (info->stream, "$0x"); - if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h') - { - int float_word; - - float_word = p[0] | (p[1] << 8); - if ((d[1] == 'd' || d[1] == 'f') - && (float_word & 0xff80) == 0x8000) - { - (*info->fprintf_func) (info->stream, "[invalid %c-float]", - d[1]); - } - else - { - for (i = 0; i < size; i++) - (*info->fprintf_func) (info->stream, "%02x", - p[size - i - 1]); - (*info->fprintf_func) (info->stream, " [%c-float]", d[1]); - } - } - else - { - for (i = 0; i < size; i++) - (*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]); - } - p += size; - } - else - (*info->fprintf_func) (info->stream, "(%s)+", reg_names[reg]); - break; - case 0x90: /* autoincrement deferred: @(Rn)+ */ - if (reg == 0xF) - (*info->fprintf_func) (info->stream, "*0x%x", NEXTLONG (p)); - else - (*info->fprintf_func) (info->stream, "@(%s)+", reg_names[reg]); - break; - case 0xB0: /* displacement byte deferred: *displ(Rn) */ - (*info->fprintf_func) (info->stream, "*"); - case 0xA0: /* displacement byte: displ(Rn) */ - if (reg == 0xF) - (*info->print_address_func) (addr + 2 + NEXTBYTE (p), info); - else - (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTBYTE (p), - reg_names[reg]); - break; - case 0xD0: /* displacement word deferred: *displ(Rn) */ - (*info->fprintf_func) (info->stream, "*"); - case 0xC0: /* displacement word: displ(Rn) */ - if (reg == 0xF) - (*info->print_address_func) (addr + 3 + NEXTWORD (p), info); - else - (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTWORD (p), - reg_names[reg]); - break; - case 0xF0: /* displacement long deferred: *displ(Rn) */ - (*info->fprintf_func) (info->stream, "*"); - case 0xE0: /* displacement long: displ(Rn) */ - if (reg == 0xF) - (*info->print_address_func) (addr + 5 + NEXTLONG (p), info); - else - (*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTLONG (p), - reg_names[reg]); - break; - } - - return p - p0; -}