[uClibc-cvs] svn commit: trunk/uClibc/libc: misc/internals sysdeps/linux/i386 sysdep etc...

Wed May 25 23:42:40 UTC 2005

Author: jocke
Date: 2005-05-25 17:42:40 -0600 (Wed, 25 May 2005)
New Revision: 10400

Log:
Adapt startup code in x86 and PPC to almost match glibc. _init vs. __libc_csu_init and
_fini vs. __libc_csu_fini remains to do. 


Modified:
   trunk/uClibc/libc/misc/internals/__uClibc_main.c
   trunk/uClibc/libc/sysdeps/linux/i386/crt1.S
   trunk/uClibc/libc/sysdeps/linux/powerpc/crt1.S


Changeset:
Modified: trunk/uClibc/libc/misc/internals/__uClibc_main.c
===================================================================

--- trunk/uClibc/libc/misc/internals/__uClibc_main.c	2005-05-25 07:15:34 UTC (rev 10399)
+++ trunk/uClibc/libc/misc/internals/__uClibc_main.c	2005-05-25 23:42:40 UTC (rev 10400)
@@ -164,10 +164,11 @@
  * are initialized, just before we call the application's main function.
  */
 void __attribute__ ((__noreturn__))
-__uClibc_start_main(int argc, char **argv, char **envp,
+__uClibc_start_main(int (*main)(int argc, char **argv, char **envp),
+		    int argc, char **argv, char **envp,
 		    void (*app_init)(void), void (*app_fini)(void),
-		    int  (*main)(int argc, char **argv, char **envp),
-		    void (*rtld_fini)(void))
+		    void (*rtld_fini)(void),
+		    void *stack_end)
 {
 #ifdef __ARCH_HAS_MMU__
     unsigned long *aux_dat;

Modified: trunk/uClibc/libc/sysdeps/linux/i386/crt1.S
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/i386/crt1.S	2005-05-25 07:15:34 UTC (rev 10399)
+++ trunk/uClibc/libc/sysdeps/linux/i386/crt1.S	2005-05-25 23:42:40 UTC (rev 10400)
@@ -38,8 +38,9 @@
 
 	.global	_start
 	.type	_start,%function
-	.weak	_init
-	.weak	_fini
+	.type	_init,%function
+	.type	_fini,%function
+	.type	main,%function
 	.type	__uClibc_start_main,%function
 
 _start:
@@ -69,7 +70,6 @@
 	/* Push NULL to make sure stack ptr
 	   is 16 byte aligned when calling __uClibc_start_main */
 	pushl %ebp
-	pushl %ebp
 	
 	/* Set up an invalid (NULL return address, NULL frame pointer)
 	   callers stack frame so anybody unrolling the stack knows where
@@ -85,15 +85,14 @@
 	pop %edx
 	addl $_GLOBAL_OFFSET_TABLE_+[.-.L0],%edx
 #endif
+	pushl %esp	/* push stack ptr */
 	pushl %esi	/* Push FINI pointer */
 
 	/* Push apps .init, .fini and main arguments to __uClibc_start_main() on the stack */
 #ifdef L_Scrt1
-	pushl main at GOT(%edx)
 	pushl _fini at GOT(%edx)
 	pushl _init at GOT(%edx)
 #else
-	pushl $main
 	pushl $_fini
 	pushl $_init
 #endif
@@ -105,8 +104,10 @@
 
 	/* Ok, now run uClibc's main() -- shouldn't return */
 #ifdef L_Scrt1
+	pushl main at GOT(%edx)
 	call *__uClibc_start_main at GOT(%edx)
 #else
+	pushl $main
 	call __uClibc_start_main
 #endif
 

Modified: trunk/uClibc/libc/sysdeps/linux/powerpc/crt1.S
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/powerpc/crt1.S	2005-05-25 07:15:34 UTC (rev 10399)
+++ trunk/uClibc/libc/sysdeps/linux/powerpc/crt1.S	2005-05-25 23:42:40 UTC (rev 10400)
@@ -27,60 +27,56 @@
 #define r7      7
 #define r8      8
 #define r9      9
+#define r10     10
 #define r13     13
 #define r31     31
 
 #include <features.h>
 
-	.section ".text"
+.text
 	.globl	_start
-	.type	_start, at function
-	.weak	_init
-	.weak	_fini
+	.type	_start,%function
+	.type	_init,%function
+	.type	_fini,%function
+	.type	main,%function
 	.type	__uClibc_start_main,%function
 
-/* Stick in a dummy reference to main(), so that if an application
- * is linking when the main() function is in a static library (.a)
- * we can be sure that main() actually gets linked in */
-	.type	main,%function
-
 _start:
-	/* Save the stack pointer, in case we're statically linked under Linux.  */
-	mr	r9,r1
+	mr	r9,r1 	/* Save the stack pointer */
+	clrrwi	r1,r1,4	/* Align stack ptr to 16 bytes */
+	mr	r10,r1 	/* Pass aligned stack ptr */
 #if defined L_Scrt1
 	bl	_GLOBAL_OFFSET_TABLE_-4 at local
 	mflr	r31
 #endif
 	/* Set up an initial stack frame, and clear the LR.  */
-	clrrwi	r1,r1,4
 	li	r0,0
 	stwu	r1,-16(r1)
 	mtlr	r0
 	stw	r0,0(r1)
-
 	/* find argc from the stack pointer */
-	lwz	r3,0(r9)
+	lwz	r4,0(r9)
 	/* find argv one word offset from the stack pointer */
-	addi	r4,r9,4
+	addi	r5,r9,4
 	/* find environment pointer (argv+argc+1) */
-	lwz	r5,0(r9)
-	addi	r5,r5,1
-	rlwinm	r5,r5,2,0,29
-	add	r5,r5,r4
-	mr	r9,r7 /* Pass _dl_fini from ldso */
+	lwz	r6,0(r9)
+	addi	r6,r6,1
+	rlwinm	r6,r6,2,0,29
+	add	r6,r6,r5
+	mr	r9,r7 /* Pass _dl_fini from ldso or NULL if statically linked */
 	/* Ok, now run uClibc's main() -- shouldn't return */
 # ifdef L_Scrt1
 	lwz	r6,_init at got(r31)
 	lwz	r7,_fini at got(r31)
-	lwz	r8,main at got(r31)
+	lwz	r3,main at got(r31)
 	b	__uClibc_start_main at plt
 # else
 	lis     r6,_init at ha	# load top 16 bits
 	addi    r6,r6,_init at l	# load bottom 16 bits
-	lis     r7,_fini at ha	# load top 16 bits of &msg
+	lis     r7,_fini at ha	# load top 16 bits
 	addi    r7,r7,_fini at l	# load bottom 16 bits
-	lis     r8,main at ha	# load top 16 bits of &msg
-	addi    r8,r8,main at l	# load bottom 16 bits
+	lis     r3,main at ha	# load top 16 bits
+	addi    r3,r3,main at l	# load bottom 16 bits
 	b	__uClibc_start_main
 # endif
 .size _start,.-_start


