Commit c8135d9af670d091359cb8b03f594c7591f199ec
1 parent
9e62fd7f
fixed subtle bug: in some cases PG_DIRTY was not set correctly
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@547 c046a42c-6fe2-441c-8c8c-71466251a162
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12 additions
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7 deletions
target-i386/helper2.c
| ... | ... | @@ -348,15 +348,20 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, |
| 348 | 348 | page_size = 4096; |
| 349 | 349 | virt_addr = addr & ~0xfff; |
| 350 | 350 | } |
| 351 | + | |
| 351 | 352 | /* the page can be put in the TLB */ |
| 352 | 353 | prot = PROT_READ; |
| 353 | - if (is_user) { | |
| 354 | - if (pte & PG_RW_MASK) | |
| 355 | - prot |= PROT_WRITE; | |
| 356 | - } else { | |
| 357 | - if (!(env->cr[0] & CR0_WP_MASK) || !(pte & PG_USER_MASK) || | |
| 358 | - (pte & PG_RW_MASK)) | |
| 359 | - prot |= PROT_WRITE; | |
| 354 | + if (pte & PG_DIRTY_MASK) { | |
| 355 | + /* only set write access if already dirty... otherwise wait | |
| 356 | + for dirty access */ | |
| 357 | + if (is_user) { | |
| 358 | + if (pte & PG_RW_MASK) | |
| 359 | + prot |= PROT_WRITE; | |
| 360 | + } else { | |
| 361 | + if (!(env->cr[0] & CR0_WP_MASK) || !(pte & PG_USER_MASK) || | |
| 362 | + (pte & PG_RW_MASK)) | |
| 363 | + prot |= PROT_WRITE; | |
| 364 | + } | |
| 360 | 365 | } |
| 361 | 366 | |
| 362 | 367 | do_mapping: | ... | ... |