diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2017-10-15 20:59:34 +0800 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2017-11-19 09:20:11 +0100 |
| commit | 2fcffe26e815b7125a357c83b59617ab93c16b41 (patch) | |
| tree | fe5a973dc4bbf38bce8468a4497f5f656f082a9f /libc/sysdeps/linux/csky/crt1.S | |
| parent | 9e38e0aa45cca21d5023d0af94377f0e1e41d2f4 (diff) | |
csky: port to uclibc-ng
Follow the steps to build c-sky uclibc linux system:
1. git clone https://github.com/c-sky/buildroot.git
2. cd buildroot
3. make qemu_csky_ck810_uclibc_defconfig
4. make
Follow the buildroot/board/qemu/csky/readme.txt to run.
This buildroot toolchain is pre-build, But you can rebuild
the c-sky uclibc-ng alone and install it to the buildroot
sysroot manually.
We'll try our best to improve the uclibc-ng continuously.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Diffstat (limited to 'libc/sysdeps/linux/csky/crt1.S')
| -rw-r--r-- | libc/sysdeps/linux/csky/crt1.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/csky/crt1.S b/libc/sysdeps/linux/csky/crt1.S new file mode 100644 index 000000000..ae73843fb --- /dev/null +++ b/libc/sysdeps/linux/csky/crt1.S @@ -0,0 +1,95 @@ +#include <sysdep.h> + + .text +.global _start +.type _start,%function +.global __exit +.global atexit + +.global _init +.global _fini + +.global main +.global __uClibc_main + +/* + * argc, argv and envp are on the stack + * + * Call: + * void __uClibc_main( + * int (*main)(int, char **, char **), + * int argc, + * char **argv, + * void (*app_init)(void), + * void (*app_fini)(void), + * void (*rtld_fini)(void), + * void *stack_end attribute_unused); + */ + +_start: +#ifdef __PIC__ + __GET_GB + lrw a0, main@GOT + addu a0, gb + ldw a0, (a0) + + ldw a1, (sp) + mov a2, sp + addi a2, 4 + + mov a3, sp /* push stack_end */ + subi sp, 8 + stw a3, (sp) + + lrw a3, _init@GOT + addu a3, gb + ldw a3, (a3) + +#ifdef __CSKYABIV2__ + subi sp, 8 + lrw l4, _fini@GOT + addu l4, gb + ldw l4, (l4) + stw l4, (sp) + + stw r7, (sp, 4) /* push rtld_fini */ +#else + lrw a4, _fini@GOT + addu a4, gb + ldw a4, (a4) +#endif + + lrw l4, __uClibc_main@PLT + addu l4, gb + ldw l4, (l4) + jsr l4 + +#else /* __PIC__ */ + lrw a0, main + + ldw a1, (sp) + mov a2, sp + addi a2, 4 + + mov a3, sp /* push stack_end */ + subi sp, 8 + stw a3, (sp) + + lrw a3, _init +#ifdef __CSKYABIV2__ + subi sp, 8 + lrw l4, _fini + stw l4, (sp) + stw r7, (sp, 4) +#else + lrw a4, _fini +#endif + + lrw l4, __uClibc_main + jsr l4 +#endif /* __PIC__ */ + bsr __exit +__exit: + DO_CALL(exit, 0) + br . + |