Revision 3d97b40b
| b/cpu-all.h | ||
|---|---|---|
| 691 | 691 |
int page_get_flags(target_ulong address); |
| 692 | 692 |
void page_set_flags(target_ulong start, target_ulong end, int flags); |
| 693 | 693 |
void page_unprotect_range(target_ulong data, target_ulong data_size); |
| 694 |
int page_check_range(target_ulong start, target_ulong len, int flags); |
|
| 694 | 695 |
|
| 695 | 696 |
CPUState *cpu_copy(CPUState *env); |
| 696 | 697 |
|
| b/exec.c | ||
|---|---|---|
| 1875 | 1875 |
spin_unlock(&tb_lock); |
| 1876 | 1876 |
} |
| 1877 | 1877 |
|
| 1878 |
int page_check_range(target_ulong start, target_ulong len, int flags) |
|
| 1879 |
{
|
|
| 1880 |
PageDesc *p; |
|
| 1881 |
target_ulong end; |
|
| 1882 |
target_ulong addr; |
|
| 1883 |
|
|
| 1884 |
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */ |
|
| 1885 |
start = start & TARGET_PAGE_MASK; |
|
| 1886 |
|
|
| 1887 |
if( end < start ) |
|
| 1888 |
/* we've wrapped around */ |
|
| 1889 |
return -1; |
|
| 1890 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
|
| 1891 |
p = page_find(addr >> TARGET_PAGE_BITS); |
|
| 1892 |
if( !p ) |
|
| 1893 |
return -1; |
|
| 1894 |
if( !(p->flags & PAGE_VALID) ) |
|
| 1895 |
return -1; |
|
| 1896 |
|
|
| 1897 |
if (!(p->flags & PAGE_READ) && (flags & PAGE_READ) ) |
|
| 1898 |
return -1; |
|
| 1899 |
if (!(p->flags & PAGE_WRITE) && (flags & PAGE_WRITE) ) |
|
| 1900 |
return -1; |
|
| 1901 |
} |
|
| 1902 |
return 0; |
|
| 1903 |
} |
|
| 1904 |
|
|
| 1878 | 1905 |
/* called from signal handler: invalidate the code and unprotect the |
| 1879 | 1906 |
page. Return TRUE if the fault was succesfully handled. */ |
| 1880 | 1907 |
int page_unprotect(target_ulong address, unsigned long pc, void *puc) |
| b/linux-user/qemu.h | ||
|---|---|---|
| 203 | 203 |
#define VERIFY_READ 0 |
| 204 | 204 |
#define VERIFY_WRITE 1 |
| 205 | 205 |
|
| 206 |
#define access_ok(type,addr,size) (1) |
|
| 206 |
#define access_ok(type,addr,size) \ |
|
| 207 |
(page_check_range((target_ulong)addr,size,(type==VERIFY_READ)?PAGE_READ:PAGE_WRITE)==0) |
|
| 207 | 208 |
|
| 208 | 209 |
/* NOTE get_user and put_user use host addresses. */ |
| 209 | 210 |
#define __put_user(x,ptr)\ |
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