X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=opcodes%2Fcgen-dis.in;h=b2372fd56d7b3dc8c1eae5b75b43549a0c0d53ab;hb=3bbfbb92b3cf687215142bcd8dfe720cf9cdc6b0;hp=9fee32af2d5c9a3a1069539078ba15d99996b6a2;hpb=6bb95a0ff8ead058dbfff87384fd379f6f8aeb05;p=deliverable%2Fbinutils-gdb.git diff --git a/opcodes/cgen-dis.in b/opcodes/cgen-dis.in index 9fee32af2d..b2372fd56d 100644 --- a/opcodes/cgen-dis.in +++ b/opcodes/cgen-dis.in @@ -4,7 +4,7 @@ THIS FILE IS MACHINE GENERATED WITH CGEN. - the resultant file is machine generated, cgen-dis.in isn't -Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. +Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of the GNU Binutils and GDB, the GNU debugger. @@ -164,7 +164,7 @@ print_insn_normal (cd, dis_info, insn, fields, pc, length) { const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); disassemble_info *info = (disassemble_info *) dis_info; - const unsigned char *syn; + const CGEN_SYNTAX_CHAR_TYPE *syn; CGEN_INIT_PRINT (cd); @@ -211,21 +211,7 @@ read_insn (cd, pc, info, buf, buflen, ex_info, insn_value) ex_info->valid = (1 << buflen) - 1; ex_info->insn_bytes = buf; - switch (buflen) - { - case 1: - *insn_value = buf[0]; - break; - case 2: - *insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); - break; - case 4: - *insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); - break; - default: - abort (); - } - + *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); return 0; } @@ -247,9 +233,15 @@ print_insn (cd, pc, info, buf, buflen) const CGEN_INSN_LIST *insn_list; CGEN_EXTRACT_INFO ex_info; - int rc = read_insn (cd, pc, info, buf, buflen, & ex_info, & insn_value); - if (rc != 0) - return rc; + /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ + insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); + + /* Fill in ex_info fields like read_insn would. Don't actually call + read_insn, since the incoming buffer is already read (and possibly + modified a la m32r). */ + ex_info.valid = (1 << buflen) - 1; + ex_info.dis_info = info; + ex_info.insn_bytes = buf; /* The instructions are stored in hash lists. Pick the first one and keep trying until we find the right one. */ @@ -260,6 +252,7 @@ print_insn (cd, pc, info, buf, buflen) const CGEN_INSN *insn = insn_list->insn; CGEN_FIELDS fields; int length; + unsigned long insn_value_cropped; #ifdef CGEN_VALIDATE_INSN_SUPPORTED /* not needed as insn shouldn't be in hash lists if not supported */ @@ -274,16 +267,27 @@ print_insn (cd, pc, info, buf, buflen) /* Basic bit mask must be correct. */ /* ??? May wish to allow target to defer this check until the extract handler. */ - if ((insn_value & CGEN_INSN_BASE_MASK (insn)) + + /* Base size may exceed this instruction's size. Extract the + relevant part from the buffer. */ + if ((CGEN_INSN_BITSIZE (insn) / 8) < buflen && + (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) + insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), + info->endian == BFD_ENDIAN_BIG); + else + insn_value_cropped = insn_value; + + if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) == CGEN_INSN_BASE_VALUE (insn)) { /* Printing is handled in two passes. The first pass parses the machine insn and extracts the fields. The second pass prints them. */ -#if CGEN_INT_INSN_P - /* Make sure the entire insn is loaded into insn_value. */ - if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) + /* Make sure the entire insn is loaded into insn_value, if it + can fit. */ + if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize && + (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) { unsigned long full_insn_value; int rc = read_insn (cd, pc, info, buf, @@ -295,10 +299,9 @@ print_insn (cd, pc, info, buf, buflen) (cd, insn, &ex_info, full_insn_value, &fields, pc); } else -#endif + length = CGEN_EXTRACT_FN (cd, insn) + (cd, insn, &ex_info, insn_value_cropped, &fields, pc); - length = CGEN_EXTRACT_FN (cd, insn) - (cd, insn, &ex_info, insn_value, &fields, pc); /* length < 0 -> error */ if (length < 0) return length; @@ -331,18 +334,27 @@ default_print_insn (cd, pc, info) disassemble_info *info; { char buf[CGEN_MAX_INSN_SIZE]; + int buflen; int status; - /* Read the base part of the insn. */ + /* Attempt to read the base part of the insn. */ + buflen = cd->base_insn_bitsize / 8; + status = (*info->read_memory_func) (pc, buf, buflen, info); + + /* Try again with the minimum part, if min < base. */ + if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) + { + buflen = cd->min_insn_bitsize / 8; + status = (*info->read_memory_func) (pc, buf, buflen, info); + } - status = (*info->read_memory_func) (pc, buf, cd->base_insn_bitsize / 8, info); if (status != 0) { (*info->memory_error_func) (status, pc, info); return -1; } - return print_insn (cd, pc, info, buf, cd->base_insn_bitsize / 8); + return print_insn (cd, pc, info, buf, buflen); } /* Main entry point. @@ -372,17 +384,21 @@ print_insn_@arch@ (pc, info) arch = info->arch; if (arch == bfd_arch_unknown) arch = CGEN_BFD_ARCH; - - /* There's no standard way to compute the isa number (e.g. for arm thumb) + + /* There's no standard way to compute the machine or isa number so we leave it to the target. */ +#ifdef CGEN_COMPUTE_MACH + mach = CGEN_COMPUTE_MACH (info); +#else + mach = info->mach; +#endif + #ifdef CGEN_COMPUTE_ISA isa = CGEN_COMPUTE_ISA (info); #else isa = 0; #endif - mach = info->mach; - /* If we've switched cpu's, close the current table and open a new one. */ if (cd && (isa != prev_isa