Revision 1565b7bc
| b/exec.c | ||
|---|---|---|
| 394 | 394 |
page. Return TRUE if the fault was succesfully handled. */ |
| 395 | 395 |
int page_unprotect(unsigned long address) |
| 396 | 396 |
{
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unsigned int page_index, prot; |
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PageDesc *p; |
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unsigned int page_index, prot, pindex;
|
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PageDesc *p, *p1;
|
|
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unsigned long host_start, host_end, addr; |
| 400 | 400 |
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page_index = address >> TARGET_PAGE_BITS; |
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p = page_find(page_index); |
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if (!p) |
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host_start = address & host_page_mask; |
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page_index = host_start >> TARGET_PAGE_BITS; |
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p1 = page_find(page_index); |
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if (!p1) |
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return 0; |
| 405 |
if ((p->flags & (PAGE_WRITE_ORG | PAGE_WRITE)) == PAGE_WRITE_ORG) {
|
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/* if the page was really writable, then we change its |
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protection back to writable */ |
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host_start = address & host_page_mask; |
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host_end = host_start + host_page_size; |
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prot = 0; |
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for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE) |
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prot |= page_get_flags(addr); |
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host_end = host_start + host_page_size; |
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p = p1; |
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prot = 0; |
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for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
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prot |= p->flags; |
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p++; |
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} |
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/* if the page was really writable, then we change its |
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protection back to writable */ |
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if (prot & PAGE_WRITE_ORG) {
|
|
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mprotect((void *)host_start, host_page_size, |
| 414 | 417 |
(prot & PAGE_BITS) | PAGE_WRITE); |
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p->flags |= PAGE_WRITE;
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|
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pindex = (address - host_start) >> TARGET_PAGE_BITS;
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p1[pindex].flags |= PAGE_WRITE; |
|
| 417 | 420 |
/* and since the content will be modified, we must invalidate |
| 418 | 421 |
the corresponding translated code. */ |
| 419 | 422 |
tb_invalidate_page(address); |
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