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Diffstat (limited to 'libc/sysdeps/linux/i386')
-rw-r--r--libc/sysdeps/linux/i386/brk.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/libc/sysdeps/linux/i386/brk.c b/libc/sysdeps/linux/i386/brk.c
index 2be9c1802..744d1d037 100644
--- a/libc/sysdeps/linux/i386/brk.c
+++ b/libc/sysdeps/linux/i386/brk.c
@@ -27,23 +27,21 @@ void *__curbrk attribute_hidden = 0;
/* libc_hidden_proto(brk) */
int brk (void *addr)
{
- void *__unbounded newbrk, *__unbounded scratch;
+ void *newbrk, *ebx;
- __asm__ ("movl %%ebx, %1\n" /* Save %ebx in scratch register. */
- "movl %3, %%ebx\n" /* Put ADDR in %ebx to be syscall arg. */
- "int $0x80 # %2\n" /* Perform the system call. */
- "movl %1, %%ebx\n" /* Restore %ebx from scratch register. */
- : "=a" (newbrk), "=r" (scratch)
- : "0" (__NR_brk), "g" (__ptrvalue (addr)));
+ __asm__ (
+ "int $0x80\n"
+ : "=a" (newbrk), "=b" (ebx)
+ : "0" (__NR_brk), "1" (addr)
+ );
- __curbrk = newbrk;
+ __curbrk = newbrk;
- if (newbrk < addr)
- {
- __set_errno (ENOMEM);
- return -1;
- }
+ if (newbrk < addr) {
+ __set_errno(ENOMEM);
+ return -1;
+ }
- return 0;
+ return 0;
}
libc_hidden_def(brk)