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| 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/bsd-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/bsd-setjmp.S')
| -rw-r--r-- | libc/sysdeps/linux/arm/bsd-setjmp.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/bsd-setjmp.S b/libc/sysdeps/linux/arm/bsd-setjmp.S index 6253c6675..d7ca72ad5 100644 --- a/libc/sysdeps/linux/arm/bsd-setjmp.S +++ b/libc/sysdeps/linux/arm/bsd-setjmp.S @@ -17,6 +17,8 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <bits/arm_asm.h> + /* This just does a tail-call to `__sigsetjmp (ARG, 1)'. We cannot do it in C because it must be a tail-call, so frame-unwinding in setjmp doesn't clobber the state restored by longjmp. */ @@ -24,6 +26,29 @@ .global setjmp .type setjmp,%function .align 2 +#if defined(THUMB1_ONLY) +.thumb_func +setjmp: + mov r1, #1 +#ifdef __PIC__ + ldr r3, .L_GOT + adr r2, .L_GOT + add r3, r2, r3 + + ldr r2, .L_GOT+4 /* __sigsetjmp */ + ldr r2, [r2, r3] + bx r2 + + .align 2 +.L_GOT: + .word _GLOBAL_OFFSET_TABLE_-.L_GOT + .word __sigsetjmp(GOT) +#else + ldr r2, =__sigsetjmp + bx r2 +.pool +#endif +#else setjmp: mov r1, #1 #ifdef __PIC__ @@ -31,5 +56,6 @@ setjmp: #else b __sigsetjmp #endif +#endif .size setjmp,.-setjmp |