Revision 0776590d
| b/exec.c | ||
|---|---|---|
| 234 | 234 |
FILE *f; |
| 235 | 235 |
int n; |
| 236 | 236 |
|
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last_brk = (unsigned long)sbrk(0); |
|
| 237 | 238 |
f = fopen("/proc/self/maps", "r");
|
| 238 | 239 |
if (f) {
|
| 239 | 240 |
do {
|
| b/linux-user/mmap.c | ||
|---|---|---|
| 157 | 157 |
static abi_ulong mmap_next_start = 0x40000000; |
| 158 | 158 |
#endif |
| 159 | 159 |
|
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unsigned long last_brk; |
|
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|
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| 160 | 162 |
/* find a free memory area of size 'size'. The search starts at |
| 161 | 163 |
'start'. If 'start' == 0, then a default start address is used. |
| 162 | 164 |
Return -1 if error. |
| ... | ... | |
| 167 | 169 |
{
|
| 168 | 170 |
abi_ulong addr, addr1, addr_start; |
| 169 | 171 |
int prot; |
| 172 |
unsigned long new_brk; |
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|
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new_brk = (unsigned long)sbrk(0); |
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if (last_brk && last_brk < new_brk && last_brk == (target_ulong)last_brk) {
|
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/* This is a hack to catch the host allocating memory with brk(). |
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If it uses mmap then we loose. |
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FIXME: We really want to avoid the host allocating memory in |
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the first place, and maybe leave some slack to avoid switching |
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to mmap. */ |
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page_set_flags(last_brk & TARGET_PAGE_MASK, |
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TARGET_PAGE_ALIGN(new_brk), |
|
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PAGE_RESERVED); |
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} |
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last_brk = new_brk; |
|
| 170 | 186 |
|
| 171 | 187 |
size = HOST_PAGE_ALIGN(size); |
| 172 | 188 |
start = start & qemu_host_page_mask; |
| b/linux-user/qemu.h | ||
|---|---|---|
| 232 | 232 |
abi_ulong new_size, unsigned long flags, |
| 233 | 233 |
abi_ulong new_addr); |
| 234 | 234 |
int target_msync(abi_ulong start, abi_ulong len, int flags); |
| 235 |
extern unsigned long last_brk; |
|
| 235 | 236 |
|
| 236 | 237 |
/* user access */ |
| 237 | 238 |
|
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