gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-07 23:24:09 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

FFI: Fix stack adjustment for calls to stdcall/fastcall functions.

Browse Source
This commit is contained in:
Mike Pall 2011-12-01 16:27:24 +01:00
parent ff7e9bc464
commit e162d8cef0
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/lj_asm_x86.h
View File

@ -593,13 +593,14 @@ static void asm_callx(ASMState *as, IRIns *ir)
CCallInfo ci;
IRRef func;
IRIns *irf;
int32_t spadj = 0;
ci.flags = asm_callx_flags(as, ir);
asm_collectargs(as, ir, &ci, args);
asm_setupresult(as, ir, &ci);
#if LJ_32
/* Have to readjust stack after non-cdecl calls due to callee cleanup. */
if ((ci.flags & CCI_CC_MASK) != CCI_CC_CDECL)
emit_spsub(as, 4 * asm_count_call_slots(as, &ci, args));
spadj = 4 * asm_count_call_slots(as, &ci, args);
#endif
func = ir->op2; irf = IR(func);
if (irf->o == IR_CARG) { func = irf->op1; irf = IR(func); }
@ -608,7 +609,10 @@ static void asm_callx(ASMState *as, IRIns *ir)
/* Use a (hoistable) non-scratch register for indirect calls. */
RegSet allow = (RSET_GPR & ~RSET_SCRATCH);
Reg r = ra_alloc1(as, func, allow);
if (LJ_32) emit_spsub(as, spadj); /* Above code may cause restores! */
emit_rr(as, XO_GROUP5, XOg_CALL, r);
} else if (LJ_32) {
emit_spsub(as, spadj);
}
asm_gencall(as, &ci, args);
}