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mips: handle hook callback for blikely instruction properly. this fixes issue #330, #331

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This commit is contained in:
Nguyen Anh Quynh 2015-12-23 01:40:03 +08:00
parent 85c2bd31f5
commit 4117a111eb
1 changed files with 32 additions and 15 deletions
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47
qemu/target-mips/translate.c
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@ -18501,7 +18501,23 @@ static void gen_msa(CPUMIPSState *env, DisasContext *ctx)
}
}
static void decode_opc (CPUMIPSState *env, DisasContext *ctx, bool *insn_need_patch)
// Unicorn: trace this instruction on request
static void hook_insn(CPUMIPSState *env, DisasContext *ctx, bool *insn_need_patch, int *insn_patch_offset, int offset_value)
{
if (env->uc->hook_insn) {
TCGContext *tcg_ctx = ctx->uc->tcg_ctx;
struct hook_struct *trace = hook_find(env->uc, UC_HOOK_CODE, ctx->pc);
if (trace) {
gen_uc_tracecode(tcg_ctx, 0xf8f8f8f8, trace->callback, env->uc, ctx->pc, trace->user_data);
*insn_need_patch = true;
}
// the callback might want to stop emulation immediately
check_exit_request(tcg_ctx);
*insn_patch_offset = offset_value;
}
}
static void decode_opc (CPUMIPSState *env, DisasContext *ctx, bool *insn_need_patch, int *insn_patch_offset)
{
TCGContext *tcg_ctx = ctx->uc->tcg_ctx;
#if defined(TARGET_MIPS64)
@ -18519,17 +18535,6 @@ static void decode_opc (CPUMIPSState *env, DisasContext *ctx, bool *insn_need_pa
return;
}
// Unicorn: trace this instruction on request
if (env->uc->hook_insn) {
struct hook_struct *trace = hook_find(env->uc, UC_HOOK_CODE, ctx->pc);
if (trace) {
gen_uc_tracecode(tcg_ctx, 0xf8f8f8f8, trace->callback, env->uc, ctx->pc, trace->user_data);
*insn_need_patch = true;
}
// the callback might want to stop emulation immediately
check_exit_request(tcg_ctx);
}
/* Handle blikely not taken case */
if ((ctx->hflags & MIPS_HFLAG_BMASK_BASE) == MIPS_HFLAG_BL) {
int l1 = gen_new_label(tcg_ctx);
@ -18539,6 +18544,9 @@ static void decode_opc (CPUMIPSState *env, DisasContext *ctx, bool *insn_need_pa
tcg_gen_movi_i32(tcg_ctx, tcg_ctx->hflags, ctx->hflags & ~MIPS_HFLAG_BMASK);
gen_goto_tb(ctx, 1, ctx->pc + 4);
gen_set_label(tcg_ctx, l1);
hook_insn(env, ctx, insn_need_patch, insn_patch_offset, 14);
} else {
hook_insn(env, ctx, insn_need_patch, insn_patch_offset, 1);
}
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
@ -19264,6 +19272,8 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb,
break;
} else {
bool insn_need_patch = false;
int insn_patch_offset = 1;
// Unicorn: save param buffer
if (env->uc->hook_insn)
save_opparam_ptr = tcg_ctx->gen_opparam_ptr;
@ -19273,7 +19283,7 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb,
if (!(ctx.hflags & MIPS_HFLAG_M16)) {
ctx.opcode = cpu_ldl_code(env, ctx.pc);
insn_bytes = 4;
decode_opc(env, &ctx, &insn_need_patch);
decode_opc(env, &ctx, &insn_need_patch, &insn_patch_offset);
} else if (ctx.insn_flags & ASE_MICROMIPS) {
ctx.opcode = cpu_lduw_code(env, ctx.pc);
insn_bytes = decode_micromips_opc(env, &ctx, &insn_need_patch);
@ -19287,8 +19297,15 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb,
}
// Unicorn: patch the callback for the instruction size
if (insn_need_patch)
*(save_opparam_ptr + 1) = insn_bytes;
if (insn_need_patch) {
/*
int i;
for (i = 0; i < 30; i++)
printf("[%u] = %x\n", i, *(save_opparam_ptr + i));
printf("\n");
*/
*(save_opparam_ptr + insn_patch_offset) = insn_bytes;
}
}
if (ctx.hflags & MIPS_HFLAG_BMASK) {