[PATCH] sh: Add PIC implementation for crt1.S
Peter Griffin
pgriffin at mpc-data.co.uk
Thu Apr 30 11:47:41 UTC 2009
>From 90f15ce7cd344183086d4d6bf4e406cc06af71f5 Mon Sep 17 00:00:00 2001
From: Peter Griffin <pgriffin at mpc-data.co.uk>
Date: Wed, 29 Apr 2009 11:52:37 +0100
Subject: [PATCH] sh: Add PIC implementation for crt1.S
---
libc/sysdeps/linux/sh/crt1.S | 45 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/libc/sysdeps/linux/sh/crt1.S b/libc/sysdeps/linux/sh/crt1.S
index 1c3c544..a68cf8f 100644
--- a/libc/sysdeps/linux/sh/crt1.S
+++ b/libc/sysdeps/linux/sh/crt1.S
@@ -56,6 +56,35 @@ _start:
/* Push the stack_end, rtld_fini and fini func onto the stack */
mov.l r6, at -r15
mov.l r4, at -r15
+
+#ifdef __PIC__
+ mova L_got, r0
+ mov.l L_got, r12
+ add r0, r12
+
+ mov.l L_fini,r0
+ add r12, r0
+ mov.l r0, at -r15
+
+ /* Set up the main/init funcs that go in registers */
+ mov.l L_main, r4
+ add r12, r4
+ mov.l L_init, r7
+ add r12, r7
+
+ /* __uClibc_main (main, argc, argv, init, fini, rtld_fini, stack_end) */
+
+ /* Let the libc call main and exit with its return code. */
+ mov.l L_uClibc_main,r1
+ add r12, r1
+ jsr @r1
+ nop
+ /* We should not get here. */
+ mov.l L_abort,r1
+ add r12, r1
+ jmp @r1
+ nop
+#else
mov.l L_fini,r0
mov.l r0, at -r15
@@ -73,10 +102,25 @@ _start:
mov.l L_abort,r1
jmp @r1
nop
+#endif
.size _start,.-_start
.align 2
+#ifdef __PIC__
+L_got:
+ .long _GLOBAL_OFFSET_TABLE_
+L_main:
+ .long main at GOTOFF
+L_init:
+ .long _init at GOTOFF
+L_fini:
+ .long _fini at GOTOFF
+L_uClibc_main:
+ .long __uClibc_main at GOTOFF
+L_abort:
+ .long abort at GOTOFF
+#else
L_main:
.long main
L_init:
@@ -87,6 +131,7 @@ L_uClibc_main:
.long __uClibc_main
L_abort:
.long abort
+#endif
/* Define a symbol for the first piece of initialized data. */
.data
--
1.5.6.3
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