A large update from Manuel Novoa III <mnovoa3@bellsouth.net>.

1 files changed, 32 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/i386/brk.c b/libc/sysdeps/linux/i386/brk.c
new file mode 100644
index 000000000..2a776bac1
--- /dev/null
+++ b/libc/sysdeps/linux/i386/brk.c
@@ -0,0 +1,32 @@
+/* From libc-5.3.12 */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+extern void * ___brk_addr;
+
+extern int __init_brk ();
+
+int brk(void * end_data_seg)
+{
+    if (__init_brk () == 0)
+    {
+#if defined(__PIC__) || defined (__pic__)
+	__asm__ volatile ("pushl %%ebx\n\t"
+			  "movl %%ecx,%%ebx\n\t"
+			  "int $0x80\n\t"
+			  "popl %%ebx"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"c" (end_data_seg));
+#else
+	__asm__ volatile ("int $0x80"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"b" (end_data_seg));
+#endif
+	if (___brk_addr == end_data_seg)
+		return 0;
+	errno = ENOMEM;
+    }
+    return -1;
+}