From a80a5b718fa8ad8cc096522f117224e77bd1e1df Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Sun, 12 Dec 2004 05:02:43 +0000
Subject: Patch from Paul Brook:
The Arm crt0.S contains non-PIC code for locating _init and _fini sections.
This caused problems on my uclinux system when static constructors were
enabled.
The attached patch implements a PIC version of this code.
Paul
---
libc/sysdeps/linux/arm/crt0.S | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/libc/sysdeps/linux/arm/crt0.S b/libc/sysdeps/linux/arm/crt0.S
index 455d35d2d..f58885d17 100644
--- a/libc/sysdeps/linux/arm/crt0.S
+++ b/libc/sysdeps/linux/arm/crt0.S
@@ -93,11 +93,22 @@ _start:
#endif
#if (defined L_crt1 ) && defined __UCLIBC_CTOR_DTOR__
+#ifdef __PIC__
+ /* Store the address of _init in r3 as an argument to main() */
+ adr r5, .L_init
+ ldr r3, .L_init
+ add r3, r3, r5
+
+ /* Push _fini onto the stack as the final argument to main() */
+ ldr r4, .L_init + 4
+ add r4, r4, r5
+#else
/* Store the address of _init in r3 as an argument to main() */
ldr r3, =_init
/* Push _fini onto the stack as the final argument to main() */
ldr r4, =_fini
+#endif
stmfd sp!, {r4}
/* Ok, now run uClibc's main() -- shouldn't return */
@@ -109,6 +120,12 @@ _start:
/* Crash if somehow `exit' returns anyways. */
bl abort
+#if (defined L_crt1 ) && defined __UCLIBC_CTOR_DTOR__ && defined __PIC__
+.L_init:
+ .word _init - .L_init
+ .word _fini - .L_init
+#endif
+
/* We need this stuff to make gdb behave itself, otherwise
gdb will chokes with SIGILL when trying to debug apps.
*/
--
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