5 #include "pthread_impl.h"
14 size_t len, size, align;
15 } __static_tls ATTR_LIBC_VISIBILITY;
17 #define T __static_tls
19 void *__copy_tls(unsigned char *mem)
22 if (!T.image) return mem;
23 void **dtv = (void *)mem;
26 mem += sizeof(void *) * 2;
27 mem += -((uintptr_t)mem + sizeof(struct pthread)) & (T.align-1);
29 mem += sizeof(struct pthread);
31 mem += libc.tls_size - sizeof(struct pthread);
32 mem -= (uintptr_t)mem & (T.align-1);
38 memcpy(mem, T.image, T.len);
42 void *__tls_get_addr(size_t *v)
44 return (char *)__pthread_self()->dtv[1]+v[1];
47 static void *simple(void *p)
50 return __set_thread_area(TP_ADJ(p)) ? 0 : p;
53 weak_alias(simple, __install_initial_tls);
55 void *__mmap(void *, size_t, int, int, int, off_t);
57 #if ULONG_MAX == 0xffffffff
58 typedef Elf32_Phdr Phdr;
60 typedef Elf64_Phdr Phdr;
63 void __init_tls(size_t *aux)
65 unsigned char *p, *mem;
67 Phdr *phdr, *tls_phdr=0;
70 libc.tls_size = sizeof(struct pthread);
72 for (p=(void *)aux[AT_PHDR],n=aux[AT_PHNUM]; n; n--,p+=aux[AT_PHENT]) {
74 if (phdr->p_type == PT_PHDR)
75 base = aux[AT_PHDR] - phdr->p_vaddr;
76 if (phdr->p_type == PT_TLS)
79 if (!tls_phdr) return;
81 T.image = (void *)(base + tls_phdr->p_vaddr);
82 T.len = tls_phdr->p_filesz;
83 T.size = tls_phdr->p_memsz;
84 T.align = tls_phdr->p_align;
86 T.size += (-T.size - (uintptr_t)T.image) & (T.align-1);
87 if (T.align < 4*sizeof(size_t)) T.align = 4*sizeof(size_t);
89 libc.tls_size = 2*sizeof(void *)+T.size+T.align+sizeof(struct pthread);
91 mem = (void *)__syscall(
97 0, libc.tls_size, PROT_READ|PROT_WRITE,
98 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
100 if (!__install_initial_tls(__copy_tls(mem))) a_crash();
103 void __init_tls(size_t *auxv) { }