Revision 17e2377a exec.c
| b/exec.c | ||
|---|---|---|
| 263 | 263 |
{
|
| 264 | 264 |
PageDesc **lp, *p; |
| 265 | 265 |
|
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#if TARGET_LONG_BITS > 32 |
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/* Host memory outside guest VM. For 32-bit targets we have already |
|
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excluded high addresses. */ |
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if (index > ((target_ulong)L2_SIZE * L1_SIZE * TARGET_PAGE_SIZE)) |
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return NULL; |
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#endif |
|
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lp = &l1_map[index >> L2_BITS]; |
| 267 | 273 |
p = *lp; |
| 268 | 274 |
if (!p) {
|
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/* allocate if not found */ |
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p = qemu_malloc(sizeof(PageDesc) * L2_SIZE); |
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memset(p, 0, sizeof(PageDesc) * L2_SIZE); |
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#if defined(CONFIG_USER_ONLY) |
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unsigned long addr; |
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size_t len = sizeof(PageDesc) * L2_SIZE; |
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/* Don't use qemu_malloc because it may recurse. */ |
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p = mmap(0, len, PROT_READ | PROT_WRITE, |
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
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*lp = p; |
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addr = h2g(p); |
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if (addr == (target_ulong)addr) {
|
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page_set_flags(addr & TARGET_PAGE_MASK, |
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TARGET_PAGE_ALIGN(addr + len), |
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PAGE_RESERVED); |
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} |
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#else |
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p = qemu_mallocz(sizeof(PageDesc) * L2_SIZE); |
|
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*lp = p; |
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#endif |
|
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} |
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return p + (index & (L2_SIZE - 1)); |
| 275 | 295 |
} |
| ... | ... | |
| 1912 | 1932 |
flags |= PAGE_WRITE_ORG; |
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for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
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p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
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/* We may be called for host regions that are outside guest |
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address space. */ |
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if (!p) |
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return; |
|
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/* if the write protection is set, then we invalidate the code |
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inside */ |
| 1917 | 1941 |
if (!(p->flags & PAGE_WRITE) && |
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