diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/tcg.c | 35 |
1 files changed, 28 insertions, 7 deletions
@@ -363,17 +363,38 @@ void tcg_context_init(TCGContext *s) void tcg_prologue_init(TCGContext *s) { - /* init global prologue and epilogue */ - s->code_buf = s->code_gen_prologue; - s->code_ptr = s->code_buf; + size_t prologue_size, total_size; + void *buf0, *buf1; + + /* Put the prologue at the beginning of code_gen_buffer. */ + buf0 = s->code_gen_buffer; + s->code_ptr = buf0; + s->code_buf = buf0; + s->code_gen_prologue = buf0; + + /* Generate the prologue. */ tcg_target_qemu_prologue(s); - flush_icache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_ptr); + buf1 = s->code_ptr; + flush_icache_range((uintptr_t)buf0, (uintptr_t)buf1); + + /* Deduct the prologue from the buffer. */ + prologue_size = tcg_current_code_size(s); + s->code_gen_ptr = buf1; + s->code_gen_buffer = buf1; + s->code_buf = buf1; + total_size = s->code_gen_buffer_size - prologue_size; + s->code_gen_buffer_size = total_size; + + /* Compute a high-water mark, at which we voluntarily flush the + buffer and start over. */ + s->code_gen_buffer_max_size = total_size - TCG_MAX_OP_SIZE * OPC_BUF_SIZE; + + tcg_register_jit(s->code_gen_buffer, total_size); #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) { - size_t size = tcg_current_code_size(s); - qemu_log("PROLOGUE: [size=%zu]\n", size); - log_disas(s->code_buf, size); + qemu_log("PROLOGUE: [size=%zu]\n", prologue_size); + log_disas(buf0, prologue_size); qemu_log("\n"); qemu_log_flush(); } |