Fixup mips so it now works and provides basic functionality

1 files changed, 50 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/mips/crt0.S b/libc/sysdeps/linux/mips/crt0.S
new file mode 100644
index 000000000..a23a012ad
--- /dev/null
+++ b/libc/sysdeps/linux/mips/crt0.S
@@ -0,0 +1,50 @@
+/* When we enter this piece of code, the program stack looks like this:
+        argc            argument counter (integer)
+        argv[0]         program name (pointer)
+        argv[1...N]     program args (pointers)
+        argv[argc-1]    end of args (integer)
+	NULL
+        env[0...N]      environment variables (pointers)
+        NULL
+*/
+
+#include <features.h>
+#include "regdef.h"
+
+.text
+.global __start
+.type __start,@function
+
+__start:              
+#ifdef __PIC__
+        .set noreorder
+        bltzal zero,0f
+        nop
+0:      .cpload $31
+        .set reorder
+#endif
+
+	move $31, zero
+	lw   a0, 0($29)	    /* argc */
+	addu a1, $29, 4	    /* argv  */
+	addu a2, a0, 1	    /* load envp */
+        sll  a2, a2, 2
+	add  a2, a2, a1
+	/* Ok, now run uClibc's main() -- shouldn't return */
+	jal	__uClibc_main
+	hlt:    b hlt                   /* Crash if somehow it does return.  */
+
+#if 0 /* this should be provided by crtbegin/crtend in the compiler */
+/* a little bit of stuff to support C++ */
+	.section .ctors,"aw"
+	.align 4
+	.global __CTOR_LIST__
+__CTOR_LIST__:
+	.long -1
+
+	.section .dtors,"aw"
+	.align 4
+	.global __DTOR_LIST__
+__DTOR_LIST__:
+	.long -1
+#endif