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Add comparison hooks for RISCV (#78)

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* Add comparison hooks for RISCV
This commit is contained in:
Yufei Li 2024-10-16 18:03:00 +08:00 committed by GitHub
parent 805b14ffc4
commit c3c9c21285
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GPG Key ID: B5690EEEBB952194
1 changed files with 33 additions and 0 deletions
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33
target/riscv/translate.c
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@ -123,6 +123,12 @@ static inline bool has_ext(DisasContext *ctx, uint32_t ext)
return ctx->misa_ext & ext;
}
//// --- Begin LibAFL code ---
void libafl_gen_cmp(target_ulong pc, TCGv op0, TCGv op1, MemOp ot);
//// --- End LibAFL code ---
#ifdef TARGET_RISCV32
#define get_xl(ctx) MXL_RV32
#elif defined(CONFIG_USER_ONLY)
@ -867,6 +873,13 @@ static bool gen_arith_imm_fn(DisasContext *ctx, arg_i *a, DisasExtend ext,
return true;
}
//// --- Begin LibAFL code ---
static void gen_slt(TCGv ret, TCGv s1, TCGv s2);
static void gen_sltu(TCGv ret, TCGv s1, TCGv s2);
//// --- End LibAFL code ---
static bool gen_arith_imm_tl(DisasContext *ctx, arg_i *a, DisasExtend ext,
void (*func)(TCGv, TCGv, TCGv),
void (*f128)(TCGv, TCGv, TCGv, TCGv, TCGv, TCGv))
@ -876,6 +889,16 @@ static bool gen_arith_imm_tl(DisasContext *ctx, arg_i *a, DisasExtend ext,
TCGv src2 = tcg_constant_tl(a->imm);
if (get_ol(ctx) < MXL_RV128) {
//// --- Begin LibAFL code ---
if (func == gen_slt || func == gen_sltu) {
MemOp memop = get_ol(ctx) == MXL_RV32 ? MO_32 : MO_64;
libafl_gen_cmp(ctx->base.pc_next, src1, src2, memop);
}
//// --- End LibAFL code ---
func(dest, src1, src2);
gen_set_gpr(ctx, a->rd, dest);
} else {
@ -902,6 +925,16 @@ static bool gen_arith(DisasContext *ctx, arg_r *a, DisasExtend ext,
TCGv src2 = get_gpr(ctx, a->rs2, ext);
if (get_ol(ctx) < MXL_RV128) {
//// --- Begin LibAFL code ---
if (func == gen_slt || func == gen_sltu) {
MemOp memop = get_ol(ctx) == MXL_RV32 ? MO_32 : MO_64;
libafl_gen_cmp(ctx->base.pc_next, src1, src2, memop);
}
//// --- End LibAFL code ---
func(dest, src1, src2);
gen_set_gpr(ctx, a->rd, dest);
} else {