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authorRich Felker <dalias@aerifal.cx>2014-04-21 19:31:35 -0400
committerRich Felker <dalias@aerifal.cx>2014-04-21 19:31:35 -0400
commit9b52ab1c9a44b62236089ab0272801d049bc5b1e (patch)
treee84e7d109e733abc567c18e96f0d96ddeb73ae80
parent5c4f11d995cf178b3146cde0734d6988c145f243 (diff)
downloadmusl-9b52ab1c9a44b62236089ab0272801d049bc5b1e.tar.gz
micro-optimize some startup code for size
moving the call to __init_ssp from __init_security to __init_libc makes __init_security a leaf function, which allows the compiler to make it smaller. __init_libc is already non-leaf, and the additional call makes no difference to the amount of register spillage. in addition, it really made no sense for the call to __init_ssp to be buried inside __init_security rather than parallel with other init functions.
-rw-r--r--src/env/__init_security.c7
-rw-r--r--src/env/__libc_start_main.c4
2 files changed, 4 insertions, 7 deletions
diff --git a/src/env/__init_security.c b/src/env/__init_security.c
index da5ae948..ae623955 100644
--- a/src/env/__init_security.c
+++ b/src/env/__init_security.c
@@ -5,18 +5,11 @@
#include "libc.h"
#include "atomic.h"
-static void dummy(void *ent)
-{
-}
-weak_alias(dummy, __init_ssp);
-
void __init_security(size_t *aux)
{
struct pollfd pfd[3] = { {.fd=0}, {.fd=1}, {.fd=2} };
int i;
- __init_ssp((void *)aux[AT_RANDOM]);
-
if (aux[AT_UID]==aux[AT_EUID] && aux[AT_GID]==aux[AT_EGID]
&& !aux[AT_SECURE]) return;
diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c
index ac374922..539f72e5 100644
--- a/src/env/__libc_start_main.c
+++ b/src/env/__libc_start_main.c
@@ -11,6 +11,9 @@ extern void (*const __init_array_start)() __attribute__((weak));
extern void (*const __init_array_end)() __attribute__((weak));
#endif
+static void dummy1(void *p) {}
+weak_alias(dummy1, __init_ssp);
+
#define AUX_CNT 38
extern size_t __hwcap, __sysinfo;
@@ -33,6 +36,7 @@ void __init_libc(char **envp, char *pn)
}
__init_tls(aux);
+ __init_ssp((void *)aux[AT_RANDOM]);
__init_security(aux);
}