From 647e66a67cd3fad6d37bb9fe5f76b1e5d8e93c96 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Wed, 17 Jan 2001 10:37:05 +0000
Subject: Now works on StrongArm (using crt0.S) and arm7tdmi/uClinux with the
 arm-pic-elf compiler (using crt0pic.S).  -Erik

---
 libc/sysdeps/linux/arm/Makefile  | 11 ++++--
 libc/sysdeps/linux/arm/crt0pic.S | 74 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 libc/sysdeps/linux/arm/crt0pic.S

(limited to 'libc/sysdeps/linux/arm')

diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index c6505c93c..4b23adae7 100644
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -25,7 +25,14 @@ include $(TOPDIR)Rules.mak
 LIBC=$(TOPDIR)libc.a
 ASFLAGS=$(CFLAGS)
 
-CRT0=crt0.S
+TARGET_MACHINE_TYPE=$(shell $(CC) -dumpmachine)
+
+ifeq ($(TARGET_MACHINE_TYPE),arm-pic-elf)
+    CRT0=crt0pic.S
+else
+    CRT0=crt0.S
+endif
+
 CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
 
 SSRC=longjmp.S setjmp.S
@@ -43,7 +50,7 @@ $(LIBC): ar-target
 
 ar-target: $(OBJS) $(CRT0_OBJ)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
-	cp $(CRT0_OBJ) $(TOPDIR)$(CRT0_OBJ)
+	cp $(CRT0_OBJ) $(TOPDIR)crt0.o
 
 $(CRT0_OBJ): %.o : %.S
 	$(CC) $(CFLAGS) -c $< -o $@
diff --git a/libc/sysdeps/linux/arm/crt0pic.S b/libc/sysdeps/linux/arm/crt0pic.S
new file mode 100644
index 000000000..8e2257865
--- /dev/null
+++ b/libc/sysdeps/linux/arm/crt0pic.S
@@ -0,0 +1,74 @@
+.text
+	.align 2
+	.global __environ
+	.global _start
+	.global exit
+	.global main
+	.global __libc_init
+	.global __init_stdio
+	.global __stdio_close_all
+	.global _void_void_null_func
+
+	.type   _start,%function
+	.type   exit,%function
+	.type   main,%function
+	.type   __libc_init,%function
+	.type   __init_stdio,%function
+	.type   __stdio_close_all,%function
+	.type   _void_void_null_func,%function
+
+
+
+@ r0 = argc
+@ r1 = argv
+@ r2 = envp
+@ sl = data segment
+
+.text
+_start:
+	@ adjust the data segment base pointer
+	ldr r3,=__data_start
+	sub sl,sl,r3
+	mov r9,sl
+
+	ldr r3, .L3
+	str r2,[r9,r3]
+	ldr r0,[sp, #0]
+	ldr r1,[sp, #4]
+	ldr r2,[sp, #8]
+	
+	/* Tell libc to initialize whatever it needs */
+        bl __libc_init		    
+        bl __init_stdio
+	bl      main
+/*	ldr r0,=0  */
+	bl      exit
+
+_void_void_null_func:
+	nop
+
+.weak __libc_init
+__libc_init = _void_void_null_func
+
+.weak __init_stdio
+__init_stdio = _void_void_null_func
+
+.weak __stdio_close_all
+__stdio_close_all = _void_void_null_func
+
+.align 2
+.L3:
+	.word environ
+
+
+.data
+	.align 2
+	.global __environ
+	
+__environ:  
+	.long 0
+
+.weak environ
+environ = __environ
+
+
-- 
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