gwj / at91sam9263 · Commits

Commit 727d01d4f6846708f0f32dcf9b086a2fba15bd8c

Authored by bellard
1 parent ae228531

return code size 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@162 c046a42c-6fe2-441c-8c8c-71466251a162
Inline Side-by-side
Showing 1 changed file with 14 additions and 8 deletions
translate-i386.c
  View file @727d01d
... ... @@ -32,10 +32,6 @@
32 32 #define IN_OP_I386
33 33 #include "cpu-i386.h"
34 34  
35   -#ifndef offsetof
36   -#define offsetof(type, field) ((size_t) &((type *)0)->field)
37   -#endif
38   -
39 35 /* XXX: move that elsewhere */
40 36 static uint16_t *gen_opc_ptr;
41 37 static uint32_t *gen_opparam_ptr;
... ... @@ -3721,10 +3717,19 @@ static uint16_t gen_opc_buf[OPC_BUF_SIZE];
3721 3717 static uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
3722 3718  
3723 3719 /* return non zero if the very first instruction is invalid so that
3724   - the virtual CPU can trigger an exception. */
  3720 + the virtual CPU can trigger an exception.
  3721 +
  3722 + '*code_size_ptr' contains the target code size including the
  3723 + instruction which triggered an exception, except in case of invalid
  3724 + illegal opcode. It must never exceed one target page.
  3725 +
  3726 + '*gen_code_size_ptr' contains the size of the generated code (host
  3727 + code).
  3728 +*/
3725 3729 int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
3726 3730 int *gen_code_size_ptr,
3727   - uint8_t *pc_start, uint8_t *cs_base, int flags)
  3731 + uint8_t *pc_start, uint8_t *cs_base, int flags,
  3732 + int *code_size_ptr)
3728 3733 {
3729 3734 DisasContext dc1, *dc = &dc1;
3730 3735 uint8_t *pc_ptr;
... ... @@ -3767,7 +3772,8 @@ int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
3767 3772 generate an exception */
3768 3773 if (dc->tf)
3769 3774 break;
3770   - } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end);
  3775 + } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
  3776 + (pc_ptr - pc_start) < (TARGET_PAGE_SIZE - 32));
3771 3777 /* we must store the eflags state if it is not already done */
3772 3778 if (dc->cc_op != CC_OP_DYNAMIC)
3773 3779 gen_op_set_cc_op(dc->cc_op);
... ... @@ -3810,7 +3816,7 @@ int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
3810 3816 gen_code_size = dyngen_code(gen_code_buf, gen_opc_buf, gen_opparam_buf);
3811 3817 flush_icache_range((unsigned long)gen_code_buf, (unsigned long)(gen_code_buf + gen_code_size));
3812 3818 *gen_code_size_ptr = gen_code_size;
3813   -
  3819 + *code_size_ptr = pc_ptr - pc_start;
3814 3820 #ifdef DEBUG_DISAS
3815 3821 if (loglevel) {
3816 3822 fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
... ...