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 /ldso/ldso/csky/resolve.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 'ldso/ldso/csky/resolve.S')
| -rw-r--r-- | ldso/ldso/csky/resolve.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/ldso/ldso/csky/resolve.S b/ldso/ldso/csky/resolve.S new file mode 100644 index 000000000..46a436345 --- /dev/null +++ b/ldso/ldso/csky/resolve.S @@ -0,0 +1,72 @@ +/* + * This function is not called directly. It is jumped when attempting to use a + * symbol that has not yet been resolved. + * + *.plt*: + * subi r0, 32 + * stw r2, (r0, 0) + * stw r3, (r0, 4) + * lrw r3, #offset + * ldw r2, (gb, 8) + * jmp r2 + */ + +.import _dl_linux_resolver + +.text +.globl _dl_linux_resolve +.type _dl_linux_resolve,@function + +_dl_linux_resolve: +#ifdef __CSKYABIV1__ + stw r4, (r0, 8) + stw r5, (r0, 12) + stw r6, (r0, 16) + stw r7, (r0, 20) + stw r15,(r0, 24) + # load the ID of this module + ldw r2, (gb, 4) + # r2 = id, r3 = offset(do it in plt*) +#ifdef __PIC__ + # get global offset table address_ + bsr .L2 +.L2: + lrw r7, .L2@GOTPC + add r7, r15 + # get the address of function (_dl_linux_resolver) in got table + lrw r6, _dl_linux_resolver@GOT + add r6, r7 + ldw r5, (r6, 0) + jsr r5 +#else /* no __PIC__ */ + jsri _dl_linux_resolver /* need modify */ +#endif + # Return from _dl_linux_resolver, the address of function is in r2 + mov r1, r2 + # Restore the registers + ldw r2, (r0, 0) + ldw r3, (r0, 4) + ldw r4, (r0, 8) + ldw r5, (r0, 12) + ldw r6, (r0, 16) + ldw r7, (r0, 20) + ldw r15,(r0, 24) + # Restore the r0, because r0 is subtracted in PLT table + addi r0, 32 + # The address of function is in r1, call the function without saving pc + jmp r1 +#else /* __CSKYABIV1__ */ + subi sp, 20 + stm a0-a3, (sp) + stw lr, (sp, 16) + # a0 = id, a1 = offset(do it in plt*) + ldw a0, (gb, 4) + mov a1, t1 + bsr _dl_linux_resolver + mov t0, a0 + ldw lr, (sp, 16) + ldm a0-a3, (sp) + addi sp, 20 + jmp t0 + +#endif |