diff options
Diffstat (limited to 'arch/arm/lib32/setjmp.S')
| -rw-r--r-- | arch/arm/lib32/setjmp.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/lib32/setjmp.S b/arch/arm/lib32/setjmp.S new file mode 100644 index 0000000000..cc6cafa4af --- /dev/null +++ b/arch/arm/lib32/setjmp.S @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) 2017 Theobroma Systems Design und Consulting GmbH + */ + +#include <config.h> +#include <asm/assembler.h> +#include <linux/linkage.h> + +.pushsection .text.setjmp, "ax" +ENTRY(setjmp) + /* + * A subroutine must preserve the contents of the registers + * r4-r8, r10, r11 (v1-v5, v7 and v8) and SP (and r9 in PCS + * variants that designate r9 as v6). + */ + mov ip, sp + stm a1, {v1-v8, ip, lr} + mov a1, #0 + bx lr +ENDPROC(setjmp) +.popsection + +.pushsection .text.longjmp, "ax" +ENTRY(longjmp) + ldm a1, {v1-v8, ip, lr} + mov sp, ip + mov a1, a2 + /* If we were passed a return value of zero, return one instead */ + cmp a1, #0 + bne 1f + mov a1, #1 +1: + bx lr +ENDPROC(longjmp) +.popsection + +.pushsection .text.initjmp, "ax" +ENTRY(initjmp) + str a3, [a1, #32] /* stack pointer */ + str a2, [a1, #36] /* return address */ + mov a1, #0 + bx lr +ENDPROC(initjmp) +.popsection |