diff options
| author | Eric Andersen <andersen@codepoet.org> | 2001-01-17 10:37:05 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2001-01-17 10:37:05 +0000 |
| commit | 647e66a67cd3fad6d37bb9fe5f76b1e5d8e93c96 (patch) | |
| tree | 058efcdb93f6e9717c5d04b973ef6de55eb75487 /libc/sysdeps/linux | |
| parent | b5abf98bfd9b5296b9aad1fe998e9f020b8a856f (diff) | |
Now works on StrongArm (using crt0.S) and arm7tdmi/uClinux with
the arm-pic-elf compiler (using crt0pic.S).
-Erik
Diffstat (limited to 'libc/sysdeps/linux')
| -rw-r--r-- | libc/sysdeps/linux/arm/Makefile | 11 | ||||
| -rw-r--r-- | libc/sysdeps/linux/arm/crt0pic.S | 74 |
2 files changed, 83 insertions, 2 deletions
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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