diff options
Diffstat (limited to 'opcodes/vax-dis.c')
-rw-r--r-- | opcodes/vax-dis.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/opcodes/vax-dis.c b/opcodes/vax-dis.c deleted file mode 100644 index 54b59f30d40..00000000000 --- a/opcodes/vax-dis.c +++ /dev/null @@ -1,299 +0,0 @@ -/* Print VAX instructions. - Copyright (C) 1995, 1998 Free Software Foundation, Inc. - Contributed by Pauline Middelink <middelin@polyware.iaf.nl> - -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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "opcode/vax.h" -#include "dis-asm.h" - -/* Local function prototypes */ -static int -print_insn_arg PARAMS ((const char *, unsigned char *, bfd_vma, - disassemble_info *)); - -static int -print_insn_mode PARAMS ((int, unsigned char *, bfd_vma, disassemble_info *)); - -static char *reg_names[] = -{ - "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", - "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc" -}; - -/* 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) \ - (p += 1, FETCH_DATA (info, p), \ - COERCE_SIGNED_CHAR(p[-1])) - -/* Get a 2 byte signed integer. */ -#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000)) -#define NEXTWORD(p) \ - (p += 2, FETCH_DATA (info, p), \ - COERCE16 ((p[-1] << 8) + p[-2])) - -/* Get a 4 byte signed integer. */ -#define COERCE32(x) ((int) (((x) ^ 0x80000000) - 0x80000000)) -#define NEXTLONG(p) \ - (p += 4, FETCH_DATA (info, p), \ - (COERCE32 ((((((p[-1] << 8) + p[-2]) << 8) + p[-3]) << 8) + p[-4]))) - -/* Maximum length of an instruction. */ -#define MAXLEN 25 - -#include <setjmp.h> - -struct private -{ - /* Points to first byte not fetched. */ - bfd_byte *max_fetched; - bfd_byte the_buffer[MAXLEN]; - bfd_vma insn_start; - jmp_buf bailout; -}; - -/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) - to ADDR (exclusive) are valid. Returns 1 for success, longjmps - on error. */ -#define FETCH_DATA(info, addr) \ - ((addr) <= ((struct private *)(info->private_data))->max_fetched \ - ? 1 : fetch_data ((info), (addr))) - -static int -fetch_data (info, addr) - struct disassemble_info *info; - bfd_byte *addr; -{ - int status; - struct private *priv = (struct private *) info->private_data; - bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer); - - status = (*info->read_memory_func) (start, - priv->max_fetched, - addr - priv->max_fetched, - info); - if (status != 0) - { - (*info->memory_error_func) (status, start, info); - longjmp (priv->bailout, 1); - } - else - priv->max_fetched = addr; - - return 1; -} - -/* 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; -{ - const struct vot *votp; - const char *argp = NULL; - unsigned char *arg; - struct private priv; - bfd_byte *buffer = priv.the_buffer; - - info->private_data = (PTR) &priv; - priv.max_fetched = priv.the_buffer; - priv.insn_start = memaddr; - if (setjmp (priv.bailout) != 0) - { - /* Error return. */ - return -1; - } - - FETCH_DATA (info, buffer + 2); - for (votp = &votstrs[0]; votp->name[0]; votp++) - { - register vax_opcodeT opcode = votp->detail.code; - - /* 2 byte codes match 2 buffer pos. */ - if ((bfd_byte) opcode == buffer[0] - && (opcode >> 8 == 0 || opcode >> 8 == buffer[1])) - { - argp = votp->detail.args; - break; - } - } - if (argp == NULL) - { - /* Handle undefined instructions. */ - (*info->fprintf_func) (info->stream, ".word 0x%x", - (buffer[0] << 8) + buffer[1]); - return 2; - } - - /* Point at first byte of argument data, and at descriptor for first - argument. */ - arg = buffer + ((votp->detail.code >> 8) ? 2 : 1); - - /* Make sure we have it in mem */ - FETCH_DATA (info, arg); - - (*info->fprintf_func) (info->stream, "%s", votp->name); - if (*argp) - (*info->fprintf_func) (info->stream, " "); - - while (*argp) - { - arg += print_insn_arg (argp, arg, memaddr + arg - buffer, info); - argp += 2; - if (*argp) - (*info->fprintf_func) (info->stream, ","); - } - - 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 (arg_len, p0, addr, info); -} - -static int -print_insn_mode (size, p0, addr, info) - 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 */ - (*info->fprintf_func) (info->stream, "$0x%x", mode); - break; - case 0x40: /* index: base-addr[Rn] */ - p += print_insn_mode (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"); - 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; -} |