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1 #include "pthread_impl.h" | 1 #include "pthread_impl.h" |
2 #include "atomic.h" | 2 #include "atomic.h" |
3 #include "syscall.h" | 3 #include "syscall.h" |
4 /* cheat and reuse CRTJMP macro from dynlink code */ | 4 /* cheat and reuse CRTJMP macro from dynlink code */ |
5 #include "dynlink.h" | 5 #include "dynlink.h" |
6 | 6 |
7 static volatile int lock; | 7 static volatile int lock; |
8 static void *unmap_base; | 8 static void* unmap_base; |
9 static size_t unmap_size; | 9 static size_t unmap_size; |
10 static char shared_stack[256]; | 10 static char shared_stack[256]; |
11 | 11 |
12 static void do_unmap() | 12 static void do_unmap() { |
13 { | 13 __syscall(SYS_munmap, unmap_base, unmap_size); |
14 » __syscall(SYS_munmap, unmap_base, unmap_size); | 14 __syscall(SYS_exit); |
15 » __syscall(SYS_exit); | |
16 } | 15 } |
17 | 16 |
18 void __unmapself(void *base, size_t size) | 17 void __unmapself(void* base, size_t size) { |
19 { | 18 int tid = __pthread_self()->tid; |
20 » int tid=__pthread_self()->tid; | 19 char* stack = shared_stack + sizeof shared_stack; |
21 » char *stack = shared_stack + sizeof shared_stack; | 20 stack -= (uintptr_t)stack % 16; |
22 » stack -= (uintptr_t)stack % 16; | 21 while (lock || a_cas(&lock, 0, tid)) |
23 » while (lock || a_cas(&lock, 0, tid)) | 22 a_spin(); |
24 » » a_spin(); | 23 __syscall(SYS_set_tid_address, &lock); |
25 » __syscall(SYS_set_tid_address, &lock); | 24 unmap_base = base; |
26 » unmap_base = base; | 25 unmap_size = size; |
27 » unmap_size = size; | 26 CRTJMP(do_unmap, stack); |
28 » CRTJMP(do_unmap, stack); | |
29 } | 27 } |
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