diff options
| author | Tobias Anderberg <tobias.anderberg@axis.com> | 2003-09-19 12:06:05 +0000 |
|---|---|---|
| committer | Tobias Anderberg <tobias.anderberg@axis.com> | 2003-09-19 12:06:05 +0000 |
| commit | a6f671bc7c89ef6c36e037f319fd45b599f1c893 (patch) | |
| tree | 1e63578a88a8307006d26ca0474e3bb20c9a440f /libc/sysdeps/linux/cris | |
| parent | a436319a3a1e288bfaa0eb79f7066e7290464ba8 (diff) | |
Added assembler version of startup code. Fix Makefile so it uses the new
code.
Diffstat (limited to 'libc/sysdeps/linux/cris')
| -rw-r--r-- | libc/sysdeps/linux/cris/Makefile | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/cris/crt0.S | 72 |
2 files changed, 73 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/cris/Makefile b/libc/sysdeps/linux/cris/Makefile index 8a860f188..dacfb4dc5 100644 --- a/libc/sysdeps/linux/cris/Makefile +++ b/libc/sysdeps/linux/cris/Makefile @@ -20,7 +20,7 @@ TOPDIR=../../../../ include $(TOPDIR)Rules.mak ASFLAGS=$(CFLAGS) -CRT0_SRC = crt0.c +CRT0_SRC = crt0.S CRT0_OBJ = crt0.o crt1.o SSRC= setjmp.S __longjmp.S clone.S sysdep.S syscall.S diff --git a/libc/sysdeps/linux/cris/crt0.S b/libc/sysdeps/linux/cris/crt0.S new file mode 100644 index 000000000..b2f8d02a2 --- /dev/null +++ b/libc/sysdeps/linux/cris/crt0.S @@ -0,0 +1,72 @@ +;; Startup code compiant to the ELF CRIS ABI. +;; +;; Highly based on code from glibc. + +#include <sysdep.h> + + .syntax no_register_prefix + + .text + .globl _start + .type _start,@function + +#if defined L_crt0 || ! defined __UCLIBC_CTOR_DTOR__ + .type __uClibc_main,@function +#else + .weak _init + .weak _fini + .type __uClibc_start_main,@function +#endif + + ;; Setup a dummy reference to main so that if an application is linking + ;; when the main() function is in a static library we can be sure that + ;; the main() actually gets linked in. + .type main,@function + +_start: + ;; Clear the frame pointer, to mark the outermost frame. + moveq 0, r8 + + move.d [sp],r11 + move.d sp,[sp] + move.d sp,r12 + addq 4,r12 + push r9 + +#ifdef __PIC__ + move.d pc,r0 + sub.d .:GOTOFF,r0 + move.d _init:PLTG,r13 + add.d r0,r13 + move.d _fini:PLTG,r9 + add.d r0,r9 + move.d main:PLTG,r10 + add.d r0,r10 +#else + move.d _init,r13 + move.d _fini,r9 + move.d main,r10 +#endif + + push r9 + +#if (defined L_crt1 || defined L_gcrt1) && defined __UCLIBC_CTOR_DTOR__ + PLTCALL(__uClibc_start_main) +#else + PLTCALL(__uClibc_main) +#endif + + ;; Crash if 'exit' returns. + test.d [6502] +0: + ba 0b + nop + + ;; Define a symbol for the first piece of initialized data. + .data + .globl __data_start + +__data_start: + .long 0 + .weak data_start + data_start = __data_start |