Revision 17e2377a linux-user/mmap.c
b/linux-user/mmap.c | ||
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} |
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#endif |
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void *qemu_vmalloc(size_t size) |
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{ |
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void *p; |
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unsigned long addr; |
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mmap_lock(); |
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/* Use map and mark the pages as used. */ |
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p = mmap(NULL, size, PROT_READ | PROT_WRITE, |
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
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addr = (unsigned long)p; |
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if (addr == (target_ulong) addr) { |
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/* Allocated region overlaps guest address space. |
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This may recurse. */ |
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page_set_flags(addr & TARGET_PAGE_MASK, TARGET_PAGE_ALIGN(addr + size), |
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PAGE_RESERVED); |
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} |
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mmap_unlock(); |
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return p; |
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} |
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void *qemu_malloc(size_t size) |
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{ |
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char * p; |
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size += 16; |
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p = qemu_vmalloc(size); |
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*(size_t *)p = size; |
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return p + 16; |
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} |
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/* We use map, which is always zero initialized. */ |
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void * qemu_mallocz(size_t size) |
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{ |
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return qemu_malloc(size); |
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} |
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void qemu_free(void *ptr) |
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{ |
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/* FIXME: We should unmark the reserved pages here. However this gets |
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complicated when one target page spans multiple host pages, so we |
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don't bother. */ |
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size_t *p; |
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p = (size_t *)((char *)ptr - 16); |
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munmap(p, *p); |
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} |
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/* NOTE: all the constants are the HOST ones, but addresses are target. */ |
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int target_mprotect(abi_ulong start, abi_ulong len, int prot) |
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{ |
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