diff options
| author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-03-26 13:40:36 +0000 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-03-26 13:40:36 +0000 |
| commit | efce79f09ae6daa77cd322df0d532beec3f445f5 (patch) | |
| tree | ae936850c5671b8bea0abf0d33bf2196f7abc796 /libc/sysdeps/linux/arm/setjmp.S | |
| parent | 17e961d9c708ab202760ce830f8efe73e91bb129 (diff) | |
Paul Brook writes:
The attached patch adds support for compiling arm uClibc as pure Thumb code.
This is needed because some recent ARM codes do not implement traditional ARM
mode. Specifically:
* Cortex-M1 - An extremely minimal FPGA based core that only implements
Thumb-1 (aka ARMv6-M).
* Cortex-M3 - A Thumb-2 only ARMv7-M core.
Most of uClibc already builds in Thumb mode, all that is left are a handful of
assembly bits.
Tested on arm-uclinuxeabi.
Diffstat (limited to 'libc/sysdeps/linux/arm/setjmp.S')
| -rw-r--r-- | libc/sysdeps/linux/arm/setjmp.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/setjmp.S b/libc/sysdeps/linux/arm/setjmp.S index 8d15b8324..2df7d551a 100644 --- a/libc/sysdeps/linux/arm/setjmp.S +++ b/libc/sysdeps/linux/arm/setjmp.S @@ -18,15 +18,41 @@ 02111-1307 USA. */ #include <features.h> +#include <bits/arm_asm.h> .global __sigsetjmp .type __sigsetjmp,%function .align 2 +#if defined(THUMB1_ONLY) +.thumb_func __sigsetjmp: + push {r3, r4, r5, r6, r7, lr} mov ip, r0 + stmia r0!, {r4, r5, r6, r7} + mov r2, r8 + mov r3, r9 + mov r4, sl + mov r5, fp + add r6, sp, #(6 * 4) + mov r7, lr + stmia r0!, {r2, r3, r4, r5, r6, r7} + mov r0, ip + bl __sigjmp_save + pop {r3, r4, r5, r6, r7, pc} + +#else +__sigsetjmp: + /* Save registers */ + mov ip, r0 +#if defined(__thumb2__) + stmia ip!, {v1-v6, sl, fp} + movs r2, sp + stmia ip!, {r2, lr} +#else /* Save registers */ stmia ip!, {v1-v6, sl, fp, sp, lr} +#endif #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ # ifdef __VFP_FP__ /* Store the VFP registers. */ @@ -70,5 +96,6 @@ __sigsetjmp: #else B __sigjmp_save #endif +#endif .size __sigsetjmp,.-__sigsetjmp |