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ARM: Fix stack restore for FP slots.

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Thanks to Peter Cawley. #1131
This commit is contained in:
Mike Pall 2023-12-10 16:10:48 +01:00
parent 1b38c73655
commit 10cc759f25
1 changed files with 9 additions and 1 deletions
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10
src/lj_asm_arm.h
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@ -1991,11 +1991,12 @@ static void asm_stack_restore(ASMState *as, SnapShot *snap)
SnapEntry *map = &as->T->snapmap[snap->mapofs]; SnapEntry *map = &as->T->snapmap[snap->mapofs];
SnapEntry *flinks = &as->T->snapmap[snap_nextofs(as->T, snap)-1]; SnapEntry *flinks = &as->T->snapmap[snap_nextofs(as->T, snap)-1];
MSize n, nent = snap->nent; MSize n, nent = snap->nent;
int32_t bias = 0;
/* Store the value of all modified slots to the Lua stack. */ /* Store the value of all modified slots to the Lua stack. */
for (n = 0; n < nent; n++) { for (n = 0; n < nent; n++) {
SnapEntry sn = map[n]; SnapEntry sn = map[n];
BCReg s = snap_slot(sn); BCReg s = snap_slot(sn);
int32_t ofs = 8*((int32_t)s-1); int32_t ofs = 8*((int32_t)s-1) - bias;
IRRef ref = snap_ref(sn); IRRef ref = snap_ref(sn);
IRIns *ir = IR(ref); IRIns *ir = IR(ref);
if ((sn & SNAP_NORESTORE)) if ((sn & SNAP_NORESTORE))
@ -2013,6 +2014,12 @@ static void asm_stack_restore(ASMState *as, SnapShot *snap)
emit_lso(as, ARMI_STR, tmp, RID_BASE, ofs+4); emit_lso(as, ARMI_STR, tmp, RID_BASE, ofs+4);
#else #else
Reg src = ra_alloc1(as, ref, RSET_FPR); Reg src = ra_alloc1(as, ref, RSET_FPR);
if (LJ_UNLIKELY(ofs < -1020 || ofs > 1020)) {
int32_t adj = ofs & 0xffffff00; /* K12-friendly. */
bias += adj;
ofs -= adj;
emit_addptr(as, RID_BASE, -adj);
}
emit_vlso(as, ARMI_VSTR_D, src, RID_BASE, ofs); emit_vlso(as, ARMI_VSTR_D, src, RID_BASE, ofs);
#endif #endif
} else { } else {
@ -2038,6 +2045,7 @@ static void asm_stack_restore(ASMState *as, SnapShot *snap)
} }
checkmclim(as); checkmclim(as);
} }
emit_addptr(as, RID_BASE, bias);
lua_assert(map + nent == flinks); lua_assert(map + nent == flinks);
} }