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format: Emit XACQUIRE/XRELEASE

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As CMPXCHGD has a mandatory prefix table, it is absolutely necessary
that the presence of any tables does not modify any decoding state.
This commit is contained in:
Alexis Engelke
2021-01-23 14:35:08 +01:00
parent ab63a3c921
commit f17d84cee6
3 changed files with 43 additions and 2 deletions
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18
format.c
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@@ -125,6 +125,7 @@ fd_format_abs(const FdInstr* instr, uint64_t addr, char* buffer, size_t len)
const char* mnemonic = fdi_name(FD_TYPE(instr));
bool prefix_rep = false;
bool prefix_xacq_xrel = false;
bool prefix_addrsize = false;
bool prefix_segment = false;
@@ -183,6 +184,16 @@ fd_format_abs(const FdInstr* instr, uint64_t addr, char* buffer, size_t len)
FD_OP_REG_TYPE(instr, 0) == FD_RT_SEG)
sizesuffix[0] = 'w';
break;
case FDI_XCHG:
if (FD_OP_TYPE(instr, 0) == FD_OT_MEM)
prefix_xacq_xrel = true;
break;
case FDI_MOV:
// MOV C6h/C7h can have XRELEASE prefix.
if (FD_HAS_REP(instr) && FD_OP_TYPE(instr, 0) == FD_OT_MEM &&
FD_OP_TYPE(instr, 1) == FD_OT_IMM)
prefix_xacq_xrel = true;
break;
case FDI_FXSAVE:
case FDI_FXRSTOR:
case FDI_XSAVE:
@@ -217,7 +228,12 @@ fd_format_abs(const FdInstr* instr, uint64_t addr, char* buffer, size_t len)
default: break;
}
if (prefix_rep) {
if (prefix_xacq_xrel || FD_HAS_LOCK(instr)) {
if (FD_HAS_REP(instr))
buf = fd_strplcpy(buf, "xrelease ", end-buf);
if (FD_HAS_REPNZ(instr))
buf = fd_strplcpy(buf, "xacquire ", end-buf);
} else if (prefix_rep) {
if (FD_HAS_REP(instr))
buf = fd_strplcpy(buf, "rep ", end-buf);
if (FD_HAS_REPNZ(instr))