diff options
Diffstat (limited to 'opcodes/tic54x-dis.c')
| -rw-r--r-- | opcodes/tic54x-dis.c | 117 |
1 files changed, 49 insertions, 68 deletions
diff --git a/opcodes/tic54x-dis.c b/opcodes/tic54x-dis.c index 75bebf3..c531b0b 100644 --- a/opcodes/tic54x-dis.c +++ b/opcodes/tic54x-dis.c @@ -25,22 +25,14 @@ #include "opcode/tic54x.h" #include "coff/tic54x.h" -typedef struct _instruction { - int parallel; - template *tm; - partemplate *ptm; -} instruction; - -static int has_lkaddr PARAMS ((unsigned short, template *)); -static int get_insn_size PARAMS ((unsigned short, instruction *)); -static int get_instruction PARAMS ((disassemble_info *, bfd_vma, - unsigned short, instruction *)); -static int print_instruction PARAMS ((disassemble_info *, bfd_vma, - unsigned short, char *, - enum optype [], int, int)); -static int print_parallel_instruction PARAMS ((disassemble_info *, bfd_vma, - unsigned short, partemplate *, - int)); +static int has_lkaddr (unsigned short, const template *); +static int get_insn_size (unsigned short, const template *); +static int print_instruction (disassemble_info *, bfd_vma, + unsigned short, const char *, + const enum optype [], int, int); +static int print_parallel_instruction (disassemble_info *, bfd_vma, + unsigned short, + const template *, int); static int sprint_dual_address (disassemble_info *,char [], unsigned short); static int sprint_indirect_address (disassemble_info *,char [], @@ -52,14 +44,12 @@ static int sprint_condition (disassemble_info *,char *,unsigned short); static int sprint_cc2 (disassemble_info *,char *,unsigned short); int -print_insn_tic54x (memaddr, info) - bfd_vma memaddr; - disassemble_info *info; +print_insn_tic54x (bfd_vma memaddr, disassemble_info *info) { bfd_byte opbuf[2]; unsigned short opcode; int status, size; - instruction insn; + const template* tm; status = (*info->read_memory_func) (memaddr, opbuf, 2, info); if (status != 0) @@ -69,26 +59,24 @@ print_insn_tic54x (memaddr, info) } opcode = bfd_getl16 (opbuf); - if (!get_instruction (info, memaddr, opcode, &insn)) - return -1; + tm = tic54x_get_insn (info, memaddr, opcode, &size); - size = get_insn_size (opcode, &insn); info->bytes_per_line = 2; info->bytes_per_chunk = 2; info->octets_per_byte = 2; info->display_endian = BFD_ENDIAN_LITTLE; - if (insn.parallel) + if (tm->flags & FL_PAR) { - if (!print_parallel_instruction (info, memaddr, opcode, insn.ptm, size)) + if (!print_parallel_instruction (info, memaddr, opcode, tm, size)) return -1; } else { if (!print_instruction (info, memaddr, opcode, - (char *) insn.tm->name, - insn.tm->operand_types, - size, (insn.tm->flags & FL_EXT))) + (char *) tm->name, + tm->operand_types, + size, (tm->flags & FL_EXT))) return -1; } @@ -96,33 +84,28 @@ print_insn_tic54x (memaddr, info) } static int -has_lkaddr (opcode, tm) - unsigned short opcode; - template *tm; +has_lkaddr (unsigned short memdata, const template *tm) { - return (IS_LKADDR (opcode) + return (IS_LKADDR (memdata) && (OPTYPE (tm->operand_types[0]) == OP_Smem || OPTYPE (tm->operand_types[1]) == OP_Smem || OPTYPE (tm->operand_types[2]) == OP_Smem - || OPTYPE (tm->operand_types[1]) == OP_Sind)); + || OPTYPE (tm->operand_types[1]) == OP_Sind + || OPTYPE (tm->operand_types[0]) == OP_Lmem + || OPTYPE (tm->operand_types[1]) == OP_Lmem)); } /* always returns 1 (whether an insn template was found) since we provide an "unknown instruction" template */ -static int -get_instruction (info, addr, opcode, insn) - disassemble_info *info; - bfd_vma addr; - unsigned short opcode; - instruction *insn; +const template* +tic54x_get_insn (disassemble_info *info, bfd_vma addr, + unsigned short memdata, int *size) { - template * tm; - partemplate * ptm; + const template *tm = NULL; - insn->parallel = 0; - for (tm = (template *) tic54x_optab; tm->name; tm++) + for (tm = tic54x_optab; tm->name; tm++) { - if (tm->opcode == (opcode & tm->mask)) + if (tm->opcode == (memdata & tm->mask)) { /* a few opcodes span two words */ if (tm->flags & FL_EXT) @@ -130,54 +113,52 @@ get_instruction (info, addr, opcode, insn) /* if lk addressing is used, the second half of the opcode gets pushed one word later */ bfd_byte opbuf[2]; - bfd_vma addr2 = addr + 1 + has_lkaddr (opcode, tm); + bfd_vma addr2 = addr + 1 + has_lkaddr (memdata, tm); int status = (*info->read_memory_func) (addr2, opbuf, 2, info); + // FIXME handle errors if (status == 0) { - unsigned short opcode2 = bfd_getl16 (opbuf); - if (tm->opcode2 == (opcode2 & tm->mask2)) + unsigned short data2 = bfd_getl16 (opbuf); + if (tm->opcode2 == (data2 & tm->mask2)) { - insn->tm = tm; - return 1; + if (size) *size = get_insn_size (memdata, tm); + return tm; } } } else { - insn->tm = tm; - return 1; + if (size) *size = get_insn_size (memdata, tm); + return tm; } } } - for (ptm = (partemplate *) tic54x_paroptab; ptm->name; ptm++) + for (tm = (template *) tic54x_paroptab; tm->name; tm++) { - if (ptm->opcode == (opcode & ptm->mask)) + if (tm->opcode == (memdata & tm->mask)) { - insn->parallel = 1; - insn->ptm = ptm; - return 1; + if (size) *size = get_insn_size (memdata, tm); + return tm; } } - insn->tm = (template *) &tic54x_unknown_opcode; - return 1; + if (size) *size = 1; + return &tic54x_unknown_opcode; } static int -get_insn_size (opcode, insn) - unsigned short opcode; - instruction *insn; +get_insn_size (unsigned short memdata, const template *insn) { int size; - if (insn->parallel) + if (insn->flags & FL_PAR) { /* only non-parallel instructions support lk addressing */ - size = insn->ptm->words; + size = insn->words; } else { - size = insn->tm->words + has_lkaddr (opcode, insn->tm); + size = insn->words + has_lkaddr (memdata, insn); } return size; @@ -188,8 +169,8 @@ print_instruction (info, memaddr, opcode, tm_name, tm_operands, size, ext) disassemble_info *info; bfd_vma memaddr; unsigned short opcode; - char *tm_name; - enum optype tm_operands[]; + const char *tm_name; + const enum optype tm_operands[]; int size; int ext; { @@ -486,7 +467,7 @@ print_parallel_instruction (info, memaddr, opcode, ptm, size) disassemble_info *info; bfd_vma memaddr; unsigned short opcode; - partemplate *ptm; + const template *ptm; int size; { print_instruction (info, memaddr, opcode, @@ -541,7 +522,7 @@ sprint_direct_address (info, buf, opcode) unsigned short opcode; { /* FIXME -- look up relocation if available */ - return sprintf (buf, "0x??%02x", (int) (opcode & 0x7F)); + return sprintf (buf, "DP+0x%02x", (int) (opcode & 0x7F)); } static int |