diff options
Diffstat (limited to 'translate-all.c')
| -rw-r--r-- | translate-all.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/translate-all.c b/translate-all.c index c599dc4d41..2285961ea9 100644 --- a/translate-all.c +++ b/translate-all.c @@ -1439,10 +1439,13 @@ void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) } } #else -/* Called with mmap_lock held. */ -static void tb_invalidate_phys_page(tb_page_addr_t addr, - uintptr_t pc, void *puc, - bool locked) +/* Called with mmap_lock held. If pc is not 0 then it indicates the + * host PC of the faulting store instruction that caused this invalidate. + * Returns true if the caller needs to abort execution of the current + * TB (because it was modified by this store and the guest CPU has + * precise-SMC semantics). + */ +static bool tb_invalidate_phys_page(tb_page_addr_t addr, uintptr_t pc) { TranslationBlock *tb; PageDesc *p; @@ -1460,7 +1463,7 @@ static void tb_invalidate_phys_page(tb_page_addr_t addr, addr &= TARGET_PAGE_MASK; p = page_find(addr >> TARGET_PAGE_BITS); if (!p) { - return; + return false; } tb = p->first_tb; #ifdef TARGET_HAS_PRECISE_SMC @@ -1499,12 +1502,10 @@ static void tb_invalidate_phys_page(tb_page_addr_t addr, modifying the memory. It will ensure that it cannot modify itself */ tb_gen_code(cpu, current_pc, current_cs_base, current_flags, 1); - if (locked) { - mmap_unlock(); - } - cpu_resume_from_signal(cpu, puc); + return true; } #endif + return false; } #endif @@ -1902,7 +1903,7 @@ void page_set_flags(target_ulong start, target_ulong end, int flags) if (!(p->flags & PAGE_WRITE) && (flags & PAGE_WRITE) && p->first_tb) { - tb_invalidate_phys_page(addr, 0, NULL, false); + tb_invalidate_phys_page(addr, 0); } p->flags = flags; } @@ -1996,7 +1997,10 @@ int page_unprotect(target_ulong address, uintptr_t pc, void *puc) /* and since the content will be modified, we must invalidate the corresponding translated code. */ - tb_invalidate_phys_page(addr, pc, puc, true); + if (tb_invalidate_phys_page(addr, pc)) { + mmap_unlock(); + cpu_resume_from_signal(current_cpu, puc); + } #ifdef DEBUG_TB_CHECK tb_invalidate_check(addr); #endif |