3 #include "pthread_impl.h"
10 static size_t len, size, align;
12 void *__copy_tls(unsigned char *mem)
14 mem += -size & (4*sizeof(size_t)-1);
15 mem += ((uintptr_t)image - (uintptr_t)mem) & (align-1);
16 memcpy(mem, image, len);
20 static void *simple(void *p)
23 return __set_thread_area(p) ? 0 : p;
26 weak_alias(simple, __install_initial_tls);
28 void *__mmap(void *, size_t, int, int, int, off_t);
30 #if ULONG_MAX == 0xffffffff
31 typedef Elf32_Phdr Phdr;
33 typedef Elf64_Phdr Phdr;
38 void __init_tls(size_t *auxv)
40 size_t i, aux[AUX_CNT] = { 0 };
41 unsigned char *p, *mem;
43 Phdr *phdr, *tls_phdr=0;
46 for (; auxv[0]; auxv+=2) if (auxv[0]<AUX_CNT) aux[auxv[0]] = auxv[1];
47 p = (void *)aux[AT_PHDR];
48 for (p=(void *)aux[AT_PHDR]; aux[AT_PHNUM]--; p+=aux[AT_PHENT]) {
50 if (phdr->p_type == PT_PHDR)
51 base = aux[AT_PHDR] - phdr->p_vaddr;
52 if (phdr->p_type == PT_TLS)
55 if (!tls_phdr) return;
57 libc.tls_size = size+align+8*sizeof(size_t)+sizeof(struct pthread);
59 image = (void *)(base + tls_phdr->p_vaddr);
60 len = tls_phdr->p_filesz;
61 size = tls_phdr->p_memsz;
62 align = tls_phdr->p_align;
63 mem = __mmap(0, libc.tls_size, PROT_READ|PROT_WRITE,
64 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
65 if (mem == MAP_FAILED) a_crash();
67 if (!__install_initial_tls(__copy_tls(mem))) a_crash();
70 void __init_tls(size_t *auxv) { }