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import Unicorn2

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This commit is contained in:
Nguyen Anh Quynh
2021-10-03 22:14:44 +08:00
parent 772558119a
commit aaaea14214
837 changed files with 368717 additions and 200912 deletions
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99
qemu/include/exec/gen-icount.h
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@@ -1,72 +1,69 @@
#ifndef GEN_ICOUNT_H
#define GEN_ICOUNT_H 1
#define GEN_ICOUNT_H
#include "qemu/timer.h"
/* Helpers for instruction counting code generation. */
//static TCGArg *icount_arg;
//static int icount_label;
static inline void gen_tb_start(TCGContext *tcg_ctx)
static inline void gen_io_start(TCGContext *tcg_ctx)
{
// TCGv_i32 count;
TCGv_i32 flag;
TCGv_i32 tmp = tcg_const_i32(tcg_ctx, 1);
tcg_gen_st_i32(tcg_ctx, tmp, tcg_ctx->cpu_env,
offsetof(ArchCPU, parent_obj.can_do_io) -
offsetof(ArchCPU, env));
tcg_temp_free_i32(tcg_ctx, tmp);
}
/*
* cpu->can_do_io is cleared automatically at the beginning of
* each translation block. The cost is minimal and only paid
* for -icount, plus it would be very easy to forget doing it
* in the translator. Therefore, backends only need to call
* gen_io_start.
*/
static inline void gen_io_end(TCGContext *tcg_ctx)
{
TCGv_i32 tmp = tcg_const_i32(tcg_ctx, 0);
tcg_gen_st_i32(tcg_ctx, tmp, tcg_ctx->cpu_env,
offsetof(ArchCPU, parent_obj.can_do_io) -
offsetof(ArchCPU, env));
tcg_temp_free_i32(tcg_ctx, tmp);
}
static inline void gen_tb_start(TCGContext *tcg_ctx, TranslationBlock *tb)
{
TCGv_i32 count;
tcg_ctx->exitreq_label = gen_new_label(tcg_ctx);
flag = tcg_temp_new_i32(tcg_ctx);
tcg_gen_ld_i32(tcg_ctx, flag, tcg_ctx->cpu_env,
offsetof(CPUState, tcg_exit_req) - ENV_OFFSET);
tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_NE, flag, 0, tcg_ctx->exitreq_label);
tcg_temp_free_i32(tcg_ctx, flag);
#if 0
if (!use_icount)
// first TB ever does not need to check exit request
if (tcg_ctx->uc->first_tb) {
// next TB is not the first anymore
tcg_ctx->uc->first_tb = false;
return;
}
icount_label = gen_new_label();
count = tcg_temp_local_new_i32();
tcg_gen_ld_i32(count, cpu_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
/* This is a horrid hack to allow fixing up the value later. */
icount_arg = tcg_ctx.gen_opparam_ptr + 1;
tcg_gen_subi_i32(count, count, 0xdeadbeef);
count = tcg_temp_new_i32(tcg_ctx);
tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
tcg_gen_st16_i32(count, cpu_env,
-ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
tcg_temp_free_i32(count);
#endif
tcg_gen_ld_i32(tcg_ctx, count, tcg_ctx->cpu_env,
offsetof(ArchCPU, neg.icount_decr.u32) -
offsetof(ArchCPU, env));
tcg_gen_brcondi_i32(tcg_ctx, TCG_COND_LT, count, 0, tcg_ctx->exitreq_label);
tcg_temp_free_i32(tcg_ctx, count);
}
static inline void gen_tb_end(TCGContext *tcg_ctx, TranslationBlock *tb, int num_insns)
{
gen_set_label(tcg_ctx, tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tcg_ctx, (uintptr_t)tb + TB_EXIT_REQUESTED);
#if 0
if (use_icount) {
*icount_arg = num_insns;
gen_set_label(icount_label);
tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
if (tb_cflags(tb) & CF_USE_ICOUNT) {
/* Update the num_insn immediate parameter now that we know
* the actual insn count. */
tcg_set_insn_param(tcg_ctx->icount_start_insn, 1, num_insns);
}
#endif
gen_set_label(tcg_ctx, tcg_ctx->exitreq_label);
tcg_gen_exit_tb(tcg_ctx, tb, TB_EXIT_REQUESTED);
}
#if 0
static inline void gen_io_start(void)
{
TCGv_i32 tmp = tcg_const_i32(1);
tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
tcg_temp_free_i32(tmp);
}
static inline void gen_io_end(void)
{
TCGv_i32 tmp = tcg_const_i32(0);
tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
tcg_temp_free_i32(tmp);
}
#endif
#endif