Revision bf20dc07 exec.c
| b/exec.c | ||
|---|---|---|
| 109 | 109 |
cpu_exec() */ |
| 110 | 110 |
CPUState *cpu_single_env; |
| 111 | 111 |
/* 0 = Do not count executed instructions. |
| 112 |
1 = Precice instruction counting.
|
|
| 112 |
1 = Precise instruction counting.
|
|
| 113 | 113 |
2 = Adaptive rate instruction counting. */ |
| 114 | 114 |
int use_icount = 0; |
| 115 | 115 |
/* Current instruction counter. While executing translated code this may |
| ... | ... | |
| 1080 | 1080 |
|
| 1081 | 1081 |
void tb_free(TranslationBlock *tb) |
| 1082 | 1082 |
{
|
| 1083 |
/* In practice this is mostly used for single use temorary TB |
|
| 1083 |
/* In practice this is mostly used for single use temporary TB
|
|
| 1084 | 1084 |
Ignore the hard cases and just back up if this TB happens to |
| 1085 | 1085 |
be the last one generated. */ |
| 1086 | 1086 |
if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) {
|
| ... | ... | |
| 1394 | 1394 |
|
| 1395 | 1395 |
old_mask = env->interrupt_request; |
| 1396 | 1396 |
/* FIXME: This is probably not threadsafe. A different thread could |
| 1397 |
be in the mittle of a read-modify-write operation. */
|
|
| 1397 |
be in the middle of a read-modify-write operation. */
|
|
| 1398 | 1398 |
env->interrupt_request |= mask; |
| 1399 | 1399 |
#if defined(USE_NPTL) |
| 1400 | 1400 |
/* FIXME: TB unchaining isn't SMP safe. For now just ignore the |
| ... | ... | |
| 3019 | 3019 |
n = env->icount_decr.u16.low + tb->icount; |
| 3020 | 3020 |
cpu_restore_state(tb, env, (unsigned long)retaddr, NULL); |
| 3021 | 3021 |
/* Calculate how many instructions had been executed before the fault |
| 3022 |
occured. */ |
|
| 3022 |
occurred. */
|
|
| 3023 | 3023 |
n = n - env->icount_decr.u16.low; |
| 3024 | 3024 |
/* Generate a new TB ending on the I/O insn. */ |
| 3025 | 3025 |
n++; |
| 3026 | 3026 |
/* On MIPS and SH, delay slot instructions can only be restarted if |
| 3027 | 3027 |
they were already the first instruction in the TB. If this is not |
| 3028 |
the first instruction in a TB then re-execute the preceeding
|
|
| 3028 |
the first instruction in a TB then re-execute the preceding |
|
| 3029 | 3029 |
branch. */ |
| 3030 | 3030 |
#if defined(TARGET_MIPS) |
| 3031 | 3031 |
if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) {
|
| ... | ... | |
| 3053 | 3053 |
/* FIXME: In theory this could raise an exception. In practice |
| 3054 | 3054 |
we have already translated the block once so it's probably ok. */ |
| 3055 | 3055 |
tb_gen_code(env, pc, cs_base, flags, cflags); |
| 3056 |
/* TODO: If env->pc != tb->pc (i.e. the failuting instruction was not
|
|
| 3056 |
/* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
|
|
| 3057 | 3057 |
the first in the TB) then we end up generating a whole new TB and |
| 3058 | 3058 |
repeating the fault, which is horribly inefficient. |
| 3059 | 3059 |
Better would be to execute just this insn uncached, or generate a |
Also available in: Unified diff