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fix dlsym of thread-local symbols on archs with DTP_OFFSET!=0 

commit 6ba5517a46 modified
__tls_get_addr to offset the address by +DTP_OFFSET (0x8000 on
powerpc, mips, etc.) and adjusted the result of DTPREL relocations by
-DTP_OFFSET to compensate, but missed changing the argument setup for
calls to __tls_get_addr from dlsym.
This commit is contained in:
Rich Felker 2018-10-12 12:26:44 -04:00
parent b6d701a475
commit 37cd167639
1 changed files with 3 additions and 3 deletions
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6
ldso/dynlink.c
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@ -1918,7 +1918,7 @@ static void *do_dlsym(struct dso *p, const char *s, void *ra)
struct symdef def = find_sym(p, s, 0);
if (!def.sym) goto failed;
if ((def.sym->st_info&0xf) == STT_TLS)
return __tls_get_addr((tls_mod_off_t []){def.dso->tls_id, def.sym->st_value});
return __tls_get_addr((tls_mod_off_t []){def.dso->tls_id, def.sym->st_value-DTP_OFFSET});
if (DL_FDPIC && (def.sym->st_info&0xf) == STT_FUNC)
return def.dso->funcdescs + (def.sym - def.dso->syms);
return laddr(def.dso, def.sym->st_value);
@ -1933,7 +1933,7 @@ static void *do_dlsym(struct dso *p, const char *s, void *ra)
sym = sysv_lookup(s, h, p);
}
if (sym && (sym->st_info&0xf) == STT_TLS)
return __tls_get_addr((tls_mod_off_t []){p->tls_id, sym->st_value});
return __tls_get_addr((tls_mod_off_t []){p->tls_id, sym->st_value-DTP_OFFSET});
if (DL_FDPIC && sym && sym->st_shndx && (sym->st_info&0xf) == STT_FUNC)
return p->funcdescs + (sym - p->syms);
if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))
@ -1947,7 +1947,7 @@ static void *do_dlsym(struct dso *p, const char *s, void *ra)
sym = sysv_lookup(s, h, p->deps[i]);
}
if (sym && (sym->st_info&0xf) == STT_TLS)
return __tls_get_addr((tls_mod_off_t []){p->deps[i]->tls_id, sym->st_value});
return __tls_get_addr((tls_mod_off_t []){p->deps[i]->tls_id, sym->st_value-DTP_OFFSET});
if (DL_FDPIC && sym && sym->st_shndx && (sym->st_info&0xf) == STT_FUNC)
return p->deps[i]->funcdescs + (sym - p->deps[i]->syms);
if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))