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-rw-r--r--src/env/__init_security.c19
-rw-r--r--src/env/__init_tls.c11
-rw-r--r--src/env/__libc_start_main.c26
-rw-r--r--src/env/__stack_chk_fail.c5
-rw-r--r--src/ldso/dynlink.c4
-rw-r--r--src/thread/pthread_create.c2
6 files changed, 33 insertions, 34 deletions
diff --git a/src/env/__init_security.c b/src/env/__init_security.c
index f9de9c62..91b9b100 100644
--- a/src/env/__init_security.c
+++ b/src/env/__init_security.c
@@ -6,31 +6,26 @@
#include "libc.h"
#include "atomic.h"
-#define AUX_CNT 24
-
-static void dummy(size_t *auxv)
+static void dummy(void *ent)
{
}
weak_alias(dummy, __init_ssp);
-void __init_security(size_t *auxv)
+void __init_security(size_t *aux)
{
- size_t i, aux[AUX_CNT] = { 0 };
struct pollfd pfd[3] = { {.fd=0}, {.fd=1}, {.fd=2} };
+ int i;
#ifndef SHARED
- __init_ssp(auxv);
+ __init_ssp((void *)aux[AT_RANDOM]);
#endif
- for (; auxv[0]; auxv+=2) if (auxv[0]<AUX_CNT) aux[auxv[0]] = auxv[1];
- __hwcap = aux[AT_HWCAP];
if (aux[AT_UID]==aux[AT_EUID] && aux[AT_GID]==aux[AT_EGID]
&& !aux[AT_SECURE]) return;
__syscall(SYS_poll, pfd, 3, 0);
- for (i=0; i<3; i++)
- if (pfd[i].revents&POLLNVAL)
- if (__syscall(SYS_open, "/dev/null", O_RDWR|O_LARGEFILE)<0)
- a_crash();
+ for (i=0; i<3; i++) if (pfd[i].revents&POLLNVAL)
+ if (__syscall(SYS_open, "/dev/null", O_RDWR|O_LARGEFILE)<0)
+ a_crash();
libc.secure = 1;
}
diff --git a/src/env/__init_tls.c b/src/env/__init_tls.c
index 6b3cd28b..e70025d7 100644
--- a/src/env/__init_tls.c
+++ b/src/env/__init_tls.c
@@ -46,19 +46,14 @@ typedef Elf32_Phdr Phdr;
typedef Elf64_Phdr Phdr;
#endif
-#define AUX_CNT 6
-
-void __init_tls(size_t *auxv)
+void __init_tls(size_t *aux)
{
- size_t i, aux[AUX_CNT] = { 0 };
unsigned char *p, *mem;
size_t n, d;
Phdr *phdr, *tls_phdr=0;
size_t base = 0;
- for (; auxv[0]; auxv+=2) if (auxv[0]<AUX_CNT) aux[auxv[0]] = auxv[1];
- p = (void *)aux[AT_PHDR];
- for (p=(void *)aux[AT_PHDR]; aux[AT_PHNUM]--; p+=aux[AT_PHENT]) {
+ for (p=(void *)aux[AT_PHDR],n=aux[AT_PHNUM]; n; n--,p+=aux[AT_PHENT]) {
phdr = (void *)p;
if (phdr->p_type == PT_PHDR)
base = aux[AT_PHDR] - phdr->p_vaddr;
@@ -79,8 +74,6 @@ void __init_tls(size_t *auxv)
mem = __mmap(0, libc.tls_size, PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
- if (mem == MAP_FAILED) a_crash();
-
if (!__install_initial_tls(__copy_tls(mem))) a_crash();
}
#else
diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c
index a38569d5..07613a52 100644
--- a/src/env/__libc_start_main.c
+++ b/src/env/__libc_start_main.c
@@ -1,24 +1,36 @@
+#include <elf.h>
#include "libc.h"
void __init_tls(size_t *);
void __init_security(size_t *);
+#define AUX_CNT 38
+
+void __init_libc(char **envp)
+{
+ size_t i, *auxv, aux[AUX_CNT];
+ __environ = envp;
+ for (i=0; envp[i]; i++);
+ libc.auxv = auxv = (void *)(envp+i+1);
+ for (i=0; auxv[i]; i+=2) if (auxv[i]<AUX_CNT) aux[auxv[i]] = auxv[i+1];
+ __hwcap = aux[AT_HWCAP];
+
+ __init_tls(aux);
+ __init_security(aux);
+}
+
int __libc_start_main(
int (*main)(int, char **, char **), int argc, char **argv,
int (*init)(int, char **, char **), void (*fini)(void),
void (*ldso_fini)(void))
{
- char **envp = argv+argc+1, **auxv = envp;
+ char **envp = argv+argc+1;
+
+ __init_libc(envp);
- __environ = envp;
- do auxv++; while (*auxv);
- libc.auxv = (void *)++auxv;
libc.ldso_fini = ldso_fini;
libc.fini = fini;
- __init_tls((void *)auxv);
- __init_security((void *)auxv);
-
/* Execute constructors (static) linked into the application */
if (init) init(argc, argv, envp);
diff --git a/src/env/__stack_chk_fail.c b/src/env/__stack_chk_fail.c
index eac852b7..3e2e4b6d 100644
--- a/src/env/__stack_chk_fail.c
+++ b/src/env/__stack_chk_fail.c
@@ -6,13 +6,12 @@
uintptr_t __stack_chk_guard;
-void __init_ssp(size_t *auxv)
+void __init_ssp(void *entropy)
{
size_t i;
pthread_t self = __pthread_self_init();
uintptr_t canary;
- for (i=0; auxv[i] && auxv[i]!=AT_RANDOM; i+=2);
- if (auxv[i]) memcpy(&canary, (void *)auxv[i+1], sizeof canary);
+ if (entropy) memcpy(&canary, entropy, sizeof canary);
else canary = (uintptr_t)&canary * 1103515245;
a_cas_l(&__stack_chk_guard, 0, canary);
self->canary = __stack_chk_guard;
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 33ef7e55..c3cb6115 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -105,7 +105,7 @@ static pthread_mutex_t init_fini_lock = { ._m_type = PTHREAD_MUTEX_RECURSIVE };
struct debug *_dl_debug_addr = &debug;
-#define AUX_CNT 24
+#define AUX_CNT 38
#define DYN_CNT 34
static void decode_vec(size_t *v, size_t *a, size_t cnt)
@@ -967,7 +967,7 @@ void *__dynlink(int argc, char **argv)
debug.state = 0;
_dl_debug_state();
- if (ssp_used) __init_ssp(auxv);
+ if (ssp_used) __init_ssp((void *)aux[AT_RANDOM]);
atexit(do_fini);
do_init_fini(tail);
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index 92ce9ffb..6327a942 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -144,7 +144,7 @@ int pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict attr,
flags -= 0x200000;
}
new->unblock_cancel = self->cancel;
- new->canary = self->canary ^ (uintptr_t)&new;
+ new->canary = self->canary;
stack = (void *)new;
a_inc(&libc.threads_minus_1);