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-rw-r--r--libc/sysdeps/linux/mips/crt0.S26
1 files changed, 12 insertions, 14 deletions
diff --git a/libc/sysdeps/linux/mips/crt0.S b/libc/sysdeps/linux/mips/crt0.S
index 7ff3b253f..fd1f4b9d4 100644
--- a/libc/sysdeps/linux/mips/crt0.S
+++ b/libc/sysdeps/linux/mips/crt0.S
@@ -24,25 +24,23 @@ __start:
.set reorder
#endif
- move $31, zero
+ move $31, zero /* no return, but since the jal kills $31, skip this */
lw a0, 0($29) /* argc */
- addu a1, $29, 4 /* argv */
- addu a2, a0, 1 /* load envp */
- sll a2, a2, 2
- add a2, a2, a1
-
- /* Store the address of _init in a3 as an argument to __uClibc_start_main() */
- la a3, _init
-
- /* Push _fini onto the stack as the final argument to __uClibc_start_main()
- I don't think I am doing this properly but it at least compiles...
- */
- la t0, _fini
- sw t0,16(sp)
+ addu a1, $29, 4 /* get to start of argv */
+ addu a2, a0, 1 /* argv[0] program name (ordinal->cardinal) */
+ sll a2, a2, 2 /* multiple by 4 */
+ add a2, a2, a1 /* a2 now points to start of envp */
+ la a3, _init /* a3 is address of _init */
+ addiu sp, sp, -24 /* 16 + 4 rounded up to multiple of 8 */
+ /* multiple of 8 for longlong/double support */
+ la v0, _fini
+ sw v0, 16(sp) /* stack has 5th argument, address of _fini */
/* Ok, now run uClibc's main() -- shouldn't return */
jal __uClibc_start_main
+ addiu sp, sp, 24 /* undo stack argument */
+
/* Crash if somehow `exit' returns anyways. */
hlt:
b hlt