Revision f19412a2
| b/linux-user/mmap.c | ||
|---|---|---|
| 537 | 537 |
return ret; |
| 538 | 538 |
} |
| 539 | 539 |
|
| 540 |
/* XXX: currently, we only handle MAP_ANONYMOUS and not MAP_FIXED |
|
| 541 |
blocks which have been allocated starting on a host page */ |
|
| 542 | 540 |
abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, |
| 543 | 541 |
abi_ulong new_size, unsigned long flags, |
| 544 | 542 |
abi_ulong new_addr) |
| 545 | 543 |
{
|
| 546 | 544 |
int prot; |
| 547 |
unsigned long host_addr;
|
|
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void *host_addr;
|
|
| 548 | 546 |
|
| 549 | 547 |
mmap_lock(); |
| 550 |
/* XXX: use 5 args syscall */ |
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host_addr = (long)mremap(g2h(old_addr), old_size, new_size, flags); |
|
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if (host_addr == -1) {
|
|
| 548 |
|
|
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if (flags & MREMAP_FIXED) |
|
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host_addr = mremap(g2h(old_addr), old_size, new_size, |
|
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flags, new_addr); |
|
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else if (flags & MREMAP_MAYMOVE) {
|
|
| 553 |
abi_ulong mmap_start; |
|
| 554 |
|
|
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mmap_start = mmap_find_vma(0, new_size); |
|
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|
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if (mmap_start == -1) {
|
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errno = ENOMEM; |
|
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host_addr = MAP_FAILED; |
|
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} else |
|
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host_addr = mremap(g2h(old_addr), old_size, new_size, |
|
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flags | MREMAP_FIXED, g2h(mmap_start)); |
|
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} else {
|
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host_addr = mremap(g2h(old_addr), old_size, new_size, flags); |
|
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/* Check if address fits target address space */ |
|
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if ((unsigned long)host_addr + new_size > (abi_ulong)-1) {
|
|
| 567 |
/* Revert mremap() changes */ |
|
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host_addr = mremap(g2h(old_addr), new_size, old_size, flags); |
|
| 569 |
errno = ENOMEM; |
|
| 570 |
host_addr = MAP_FAILED; |
|
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} |
|
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} |
|
| 573 |
|
|
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if (host_addr == MAP_FAILED) {
|
|
| 553 | 575 |
new_addr = -1; |
| 554 | 576 |
} else {
|
| 555 | 577 |
new_addr = h2g(host_addr); |
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