diff options
Diffstat (limited to 'arch/openrisc/lib/setjmp.S')
| -rw-r--r-- | arch/openrisc/lib/setjmp.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/openrisc/lib/setjmp.S b/arch/openrisc/lib/setjmp.S new file mode 100644 index 0000000000..7da3477808 --- /dev/null +++ b/arch/openrisc/lib/setjmp.S @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <linux/linkage.h> + +/* int setjmp (jmp_buf); */ +ENTRY(setjmp) + l.sw 0(r3), r1 + l.sw 4(r3), r2 + l.sw 8(r3), r9 + l.sw 12(r3), r10 + l.sw 16(r3), r14 + l.sw 20(r3), r16 + l.sw 24(r3), r18 + l.sw 28(r3), r20 + l.sw 32(r3), r22 + l.sw 36(r3), r24 + l.sw 40(r3), r26 + l.sw 44(r3), r28 + l.sw 48(r3), r30 + l.jr r9 + l.movhi r11, 0x0 +END(setjmp) + +/* volatile void longjmp (jmp_buf, int); */ +ENTRY(longjmp) + l.lwz r1, 0(r3) + l.lwz r2, 4(r3) + + /* if r4 is 0, something wrong, so set it to 1 */ + l.sfeqi r4, 0x0 + l.bnf 1f /* r4 != 0, longjmp value sensible */ + l.nop + l.ori r4, r0, 0x1 /* make nonzero */ +1: + l.lwz r9, 8(r3) + l.lwz r10, 12(r3) + l.lwz r14, 16(r3) + l.lwz r16, 20(r3) + l.lwz r18, 24(r3) + l.lwz r20, 28(r3) + l.lwz r22, 32(r3) + l.lwz r24, 36(r3) + l.lwz r26, 40(r3) + l.lwz r28, 44(r3) + l.lwz r30, 48(r3) + l.jr r9 + l.addi r11, r4, 0x0 +END(longjmp) + +/* int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top); */ +ENTRY(initjmp) + l.sw 8(r3), r4 + l.sw 0(r3), r5 + l.jr r9 + l.movhi r11, 0x0 +END(initjmp) |