diff options
Diffstat (limited to 'usr/klibc/arch/arm/setjmp.S')
| -rw-r--r-- | usr/klibc/arch/arm/setjmp.S | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/usr/klibc/arch/arm/setjmp.S b/usr/klibc/arch/arm/setjmp.S new file mode 100644 index 0000000..9f96274 --- /dev/null +++ b/usr/klibc/arch/arm/setjmp.S @@ -0,0 +1,108 @@ +# +# arch/arm/setjmp.S +# +# setjmp/longjmp for the ARM architecture +# + +#include <klibc/asmmacros.h> + +#ifndef __thumb__ + +# +# "Pure ARM" version +# +# The jmp_buf is assumed to contain the following, in order: +# r4 +# r5 +# r6 +# r7 +# r8 +# r9 +# r10 +# fp +# sp +# lr +# + + .text + .balign 4 + .globl setjmp + .type setjmp, #function +setjmp: + stmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr} + mov r0, #0 + BX(lr) + .size setjmp,.-setjmp + + .text + .balign 4 + .globl longjmp + .type longjmp, #function +longjmp: + ldmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr} + movs r0, r1 + moveq r0, #1 + BX(lr) + .size longjmp,.-longjmp + +#else /* __thumb__ */ + +# +# Thumb version +# +# The jmp_buf is assumed to contain the following, in order: +# lr +# r4 +# r5 +# r6 +# r7 +# r8 +# r9 +# r10 +# fp +# sp +# + + .text + .balign 4 + .globl setjmp + .type setjmp, #function + .thumb_func +setjmp: + mov r2, r0 + mov r3, lr + stmia r0!, {r3, r4, r5, r6, r7} + mov r3, r8 + mov r4, r9 + mov r5, r10 + mov r6, fp + mov r7, sp + stmia r0!, {r3, r4, r5, r6, r7} + /* Do not trash r4 .. r7 */ + ldmia r2!, {r3, r4, r5, r6, r7} + mov r0, #0 + BX(lr) + .size setjmp,.-setjmp + + .text + .balign 4 + .globl longjmp + .type longjmp, #function + .thumb_func +longjmp: + mov r2, r0 + add r0, #5*4 + ldmia r0!, {r3, r4, r5, r6, r7} + mov r8, r3 + mov r9, r4 + mov r10, r5 + mov fp, r6 + mov sp, r7 + ldmia r2!, {r3, r4, r5, r6, r7} + mov r0, r1 + bne 1f + mov r0, #1 +1: BX(r3) + .size longjmp,.-longjmp + +#endif /* __thumb__ */ |