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arm/arch_setjmp.S: armv6m support setjmp, longjmp

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Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>
This commit is contained in:
wangbowen6 2022-04-27 00:13:56 +08:00 committed by Xiang Xiao
parent 216574bba8
commit cbab540169
1 changed files with 31 additions and 1 deletions
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32
libs/libc/machine/arm/gnu/arch_setjmp.S
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@ -65,7 +65,20 @@ setjmp:
/* Store callee-saved Core registers */
mov ip, sp /* Move sp to ip so we can save it */
#ifdef CONFIG_ARCH_ARMV6M
stmia r0!, {r4-r7} /* Save R4 ~ R7 */
mov r2, r8
mov r3, r9
mov r4, r10
mov r5, r11
mov r6, ip
mov r7, lr
stmia r0!, {r2-r7} /* Save R8 ~ R11, IP, LR */
#else
stmia r0!, {r4-r11, ip, lr}
#endif
#ifdef CONFIG_ARCH_FPU
vstmia r0!, {s16-s31} /* Save the callee-saved FP registers */
@ -81,7 +94,7 @@ setjmp:
/* we're done, we're out of here */
mov r0, #0
movs r0, #0
bx lr
.size setjmp, .-setjmp
@ -113,7 +126,24 @@ longjmp:
/* Load callee-saved Core registers */
#ifdef CONFIG_ARCH_ARMV6M
ldmia r0!, {r4-r7} /* Restore R4 ~ R7 */
ldmia r0!, {r2-r3} /* Restore R8, R9 */
mov r8, r2
mov r9, r3
ldmia r0!, {r2-r3} /* Restore R10, R11 */
mov r10, r2
mov r11, r3
ldmia r0!, {r2-r3} /* Restore IP, LR */
mov ip, r2
mov lr, r3
#else
ldmia r0!, {r4-r11, ip, lr}
#endif
mov sp, ip /* Restore sp */
#ifdef CONFIG_ARCH_FPU