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x86: handle rep/repne mulpd case

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This commit is contained in:
Nguyen Anh Quynh 2014-03-03 05:25:37 +08:00
parent f4e2344401
commit bc22b5be83
1 changed files with 38 additions and 6 deletions
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44
arch/X86/X86Mapping.c
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@ -31822,19 +31822,48 @@ void X86_insn_combine(cs_struct *h, cs_insn *insn, cs_insn *prev)
unsigned int prev_id;
uint8_t prefix;
// save prev's ID
prev_id = prev->id;
// reset prev_prefix
h->prev_prefix = 0;
// save prev's ID
prev_id = prev->id;
// copy information from insn to prev
prev->id = insn->id;
prev->size += insn->size;
memmove(prev->bytes+1, insn->bytes, sizeof(insn->bytes) - 1);
#ifndef CAPSTONE_DIET
strcpy(prev->op_str, insn->op_str);
#endif
// rep/repne mulpd are weird cases
if ((prev_id == X86_INS_REP || prev_id == X86_INS_REPNE) &&
(insn->id == X86_INS_MULPD)) {
if (prev_id == X86_INS_REPNE) {
prev->id = X86_INS_MULSD;
#ifndef CAPSTONE_DIET
strcpy(prev->mnemonic, "mulsd");
#endif
} else {
prev->id = X86_INS_MULSS;
#ifndef CAPSTONE_DIET
strcpy(prev->mnemonic, "mulss");
#endif
}
if (h->detail) {
memmove(prev->detail, insn->detail, sizeof(cs_detail));
// then free unused memory of current insn
cs_mem_free(insn->detail);
insn->detail = NULL;
}
return;
}
prev->id = insn->id;
strcat(prev->mnemonic, " ");
strcat(prev->mnemonic, insn->mnemonic);
strcpy(prev->op_str, insn->op_str);
if (h->detail) {
// save old prefix to copy it back later
@ -31844,6 +31873,7 @@ void X86_insn_combine(cs_struct *h, cs_insn *insn, cs_insn *prev)
// if prev_prefix == REP|REPNE, insert ECX/RCX into detail->regs_read/regs_write
if (prev_id == X86_INS_REP || prev_id == X86_INS_REPNE) {
#ifndef CAPSTONE_DIET
memmove(prev->detail->regs_read+1, prev->detail->regs_read,
prev->detail->regs_read_count * sizeof(prev->detail->regs_read[0]));
memmove(prev->detail->regs_write+1, prev->detail->regs_write,
@ -31852,6 +31882,7 @@ void X86_insn_combine(cs_struct *h, cs_insn *insn, cs_insn *prev)
prev->detail->regs_read_count++;
prev->detail->regs_write_count++;
// *CX is read/written implicitly
if (h->mode & CS_MODE_64) {
prev->detail->regs_read[0] = X86_REG_RCX;
prev->detail->regs_write[0] = X86_REG_RCX;
@ -31859,9 +31890,10 @@ void X86_insn_combine(cs_struct *h, cs_insn *insn, cs_insn *prev)
prev->detail->regs_read[0] = X86_REG_ECX;
prev->detail->regs_write[0] = X86_REG_ECX;
}
#endif
}
// then free unused memory
// then free unused memory of current insn
cs_mem_free(insn->detail);
insn->detail = NULL;
}