RepoMirrors/musl
1
0
Fork 0
mirror of git://git.musl-libc.org/musl synced 2025-03-06 03:37:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

__libc_start_main: slightly simplify stage2 pointer setup

Browse Source 
Use "+r" in the asm instead of implementing a non-transparent copy by
applying "0" constraint to the source value. Introduce a typedef for
the function type to avoid spelling it out twice.
This commit is contained in:
Alexander Monakov 2018-10-21 00:27:44 +03:00 committed by Rich Felker
parent 0239cd0681
commit 00bd3b7d30
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/env/__libc_start_main.c vendored
View File

@ -66,7 +66,8 @@ static void libc_start_init(void)
weak_alias(libc_start_init, __libc_start_init);
static int libc_start_main_stage2(int (*)(int,char **,char **), int, char **);
typedef int lsm2_fn(int (*)(int,char **,char **), int, char **);
static lsm2_fn libc_start_main_stage2;
int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
{
@ -79,8 +80,8 @@ int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
/* Barrier against hoisting application code or anything using ssp
* or thread pointer prior to its initialization above. */
int (*stage2)(int (*)(int,char **,char **), int, char **);
__asm__ ( "" : "=r"(stage2) : "0"(libc_start_main_stage2) : "memory" );
lsm2_fn *stage2 = libc_start_main_stage2;
__asm__ ( "" : "+r"(stage2) : : "memory" );
return stage2(main, argc, argv);
}