mirror of git://git.musl-libc.org/musl
fix buggy TLS size/alignment computations in static-linked TLS
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@ -11,10 +11,23 @@ static size_t len, size, align;
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void *__copy_tls(unsigned char *mem)
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{
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mem += -size & (4*sizeof(size_t)-1);
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mem += ((uintptr_t)image - (uintptr_t)mem) & (align-1);
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pthread_t td;
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if (!image) return mem;
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void **dtv = (void *)mem;
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dtv[0] = (void *)1;
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mem += __libc.tls_size - sizeof(struct pthread);
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mem -= (uintptr_t)mem & (align-1);
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td = (pthread_t)mem;
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td->dtv = dtv;
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mem -= size;
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dtv[1] = mem;
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memcpy(mem, image, len);
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return mem + size;
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return td;
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}
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void *__tls_get_addr(size_t *v)
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{
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return (char *)__pthread_self()->dtv[1]+v[1];
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}
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static void *simple(void *p)
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@ -54,12 +67,16 @@ void __init_tls(size_t *auxv)
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}
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if (!tls_phdr) return;
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libc.tls_size = size+align+8*sizeof(size_t)+sizeof(struct pthread);
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image = (void *)(base + tls_phdr->p_vaddr);
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len = tls_phdr->p_filesz;
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size = tls_phdr->p_memsz;
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align = tls_phdr->p_align;
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size += (-size - (uintptr_t)image) & (align-1);
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if (align < 4*sizeof(size_t)) align = 4*sizeof(size_t);
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libc.tls_size = 2*sizeof(void *)+size+align+sizeof(struct pthread);
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mem = __mmap(0, libc.tls_size, PROT_READ|PROT_WRITE,
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MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
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if (mem == MAP_FAILED) a_crash();
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