diff options
| author | Jeff Johnston <jjohnstn@redhat.com> | 2009-05-13 22:28:49 +0400 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2009-05-13 22:28:49 +0400 |
| commit | eba36c51fa066f1a8abdc41c42b9f5310d181a12 (patch) | |
| tree | 13ff297c715a20e246939569ab32ceed04e5f87c /newlib/libc/machine | |
| parent | 40c66067fb5eef002be164b35aa3637403fc1e48 (diff) | |
2009-05-13 Paul Brook <paul@codesourcery.com>
* libc/machine/arm/setjmp.S: Add ARMv6-M implementation.
Diffstat (limited to 'newlib/libc/machine')
| -rw-r--r-- | newlib/libc/machine/arm/setjmp.S | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/newlib/libc/machine/arm/setjmp.S b/newlib/libc/machine/arm/setjmp.S index 4bb2a46a7..2181a1874 100644 --- a/newlib/libc/machine/arm/setjmp.S +++ b/newlib/libc/machine/arm/setjmp.S @@ -55,6 +55,55 @@ For Thumb-2 do everything in Thumb mode. */ +#if defined(__ARM_ARCH_6M__) +/* ARMv6-M has to be implemented in Thumb mode. */ + +.thumb +.thumb_func + .globl SYM (setjmp) + TYPE (setjmp) +SYM (setjmp): + /* Save registers in jump buffer. */ + stmia r0!, {r4, r5, r6, r7} + mov r1, r8 + mov r2, r9 + mov r3, r10 + mov r4, fp + mov r5, sp + mov r6, lr + stmia r0!, {r1, r2, r3, r4, r5, r6} + sub r0, r0, #40 + /* Restore callee-saved low regs. */ + ldmia r0!, {r4, r5, r6, r7} + /* Return zero. */ + mov r0, #0 + bx lr + +.thumb_func + .globl SYM (longjmp) + TYPE (longjmp) +SYM (longjmp): + /* Restore High regs. */ + add r0, r0, #16 + ldmia r0!, {r2, r3, r4, r5, r6} + mov r8, r2 + mov r9, r3 + mov r10, r4 + mov fp, r5 + mov sp, r6 + ldmia r0!, {r3} /* lr */ + /* Restore low regs. */ + sub r0, r0, #40 + ldmia r0!, {r4, r5, r6, r7} + /* Return the result argument, or 1 if it is zero. */ + mov r0, r1 + bne 1f + mov r0, #1 +1: + bx r3 + +#else + #ifdef __APCS_26__ #define RET movs pc, lr #elif defined(__thumb2__) @@ -169,4 +218,4 @@ SYM (\name): moveq a1, #1 FUNC_END longjmp - +#endif |