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fix some oss-fuzz (#1249)

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* fix oss-fuzz 21012.

* fix oss-fuzz 21741.

* fix oss-fuzz 21743.
This commit is contained in:
Chen Huitao
2020-05-05 11:11:59 +08:00
committed by GitHub
parent f0b509c176
commit f435efd4a7
3 changed files with 5 additions and 2 deletions
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2
qemu/target-arm/neon_helper.c
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@ -855,7 +855,7 @@ uint64_t HELPER(neon_qshl_u64)(CPUARMState *env, uint64_t val, uint64_t shiftop)
if (tmp >= (ssize_t)sizeof(src1) * 8) { \ if (tmp >= (ssize_t)sizeof(src1) * 8) { \
if (src1) { \ if (src1) { \
SET_QC(); \ SET_QC(); \
dest = (uint32_t)(1 << (sizeof(src1) * 8 - 1)); \ dest = (uint32_t)(1U << (sizeof(src1) * 8 - 1)); \
if (src1 > 0) { \ if (src1 > 0) { \
dest--; \ dest--; \
} \ } \

2
qemu/target-i386/ops_sse.h
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@ -441,7 +441,7 @@ void glue(helper_pmaddwd, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
#if SHIFT == 0 #if SHIFT == 0
static inline int abs1(int a) static inline int abs1(int a)
{ {
if (a < 0) { if (a < 0 && a != 0x80000000) {
return -a; return -a;
} else { } else {
return a; return a;

3
qemu/tcg/optimize.c
View File

@ -550,6 +550,9 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
reset_all_temps(s, nb_temps); reset_all_temps(s, nb_temps);
nb_ops = tcg_opc_ptr - s->gen_opc_buf; nb_ops = tcg_opc_ptr - s->gen_opc_buf;
if (nb_ops > OPC_BUF_SIZE) {
return NULL;
}
gen_args = args; gen_args = args;
for (op_index = 0; op_index < nb_ops; op_index++) { for (op_index = 0; op_index < nb_ops; op_index++) {
TCGOpcode op = s->gen_opc_buf[op_index]; TCGOpcode op = s->gen_opc_buf[op_index];