diff options
Diffstat (limited to 'libc/sysdeps/linux/cris/__init_brk.c')
-rw-r--r-- | libc/sysdeps/linux/cris/__init_brk.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/cris/__init_brk.c b/libc/sysdeps/linux/cris/__init_brk.c new file mode 100644 index 000000000..0f5624b85 --- /dev/null +++ b/libc/sysdeps/linux/cris/__init_brk.c @@ -0,0 +1,32 @@ +/* From libc-5.3.12 */ + +#include <unistd.h> +#include <sys/syscall.h> +#include <errno.h> +#include "sysdep.h" + +void * ___brk_addr = 0; + +int +__init_brk (void) +{ + if (___brk_addr == 0) { + /* Notice that we don't need to save/restore the GOT + * register since that is not call clobbered by the syscall + */ + + asm ("clear.d $r10\n\t" + "movu.w " STR(__NR_brk) ",$r9\n\t" + "break 13\n\t" + "move.d $r10, %0" + : "=r" (___brk_addr) + : + : "r9", "r10"); + + if (___brk_addr == 0) { + __set_errno(ENOMEM); + return -1; + } + } + return 0; +} |