mirrors
/
Bochs
mirror of https://github.com/bochs-emu/Bochs
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

- copy prev_eip and prev_esp again AFTER the handle_async_event section 

has run.  This ensures that the prev_eip and prev_esp that is used
  for tracing and breakpoint checks is correct even in the cycle after
  an interrupt or trap.
This commit is contained in:
Bryce Denney 2001-09-28 04:12:26 +00:00
parent 3075cb34ed
commit 22f82dcbb3
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
bochs/cpu/cpu.cc
View File

@ -118,6 +118,7 @@ BX_CPU_C::cpu_loop(Bit32s max_instr_count)
(void) setjmp( BX_CPU_THIS_PTR jmp_buf_env );
// not sure if these two are used during the async handling... --bbd
BX_CPU_THIS_PTR prev_eip = EIP; // commit new EIP
BX_CPU_THIS_PTR prev_esp = ESP; // commit new ESP
@ -134,7 +135,13 @@ main_cpu_loop:
goto handle_async_event;
async_events_processed:
// added so that all debugging/tracing code uses the correct EIP even in the
// instruction just after a trap/interrupt. If you use the prev_eip that was
// set before handle_async_event, traces and breakpoints fail to show the
// first instruction of int/trap handlers.
BX_CPU_THIS_PTR prev_eip = EIP; // commit new EIP
BX_CPU_THIS_PTR prev_esp = ESP; // commit new ESP
// Now we can handle things which are synchronous to instruction
// execution.
if (BX_CPU_THIS_PTR eflags.rf) {
@ -189,9 +196,9 @@ async_events_processed:
{
int n=0;
if ((n & 0xffffff) == 0) {
Bit32u cs = BX_CPU(0)->sregs[BX_SEG_REG_CS].selector.value;
Bit32u eip = BX_CPU(0)->prev_eip;
fprintf (stdout, "instr %d, time %lld, pc %04x:%08x, fetch_ptr=%p\s", n, bx_pc_system.time_ticks (), cs, eip, fetch_ptr);
Bit32u cs = BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value;
Bit32u eip = BX_CPU_THIS_PTR prev_eip;
fprintf (stdout, "instr %d, time %lld, pc %04x:%08x, fetch_ptr=%p\n", n, bx_pc_system.time_ticks (), cs, eip, fetch_ptr);
}
n++;
}