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riscv/trap: fix sp restore logic

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This fixes stack pointer restore logic to avoid parent stack corruption
by forked child in PROTECTED build.

Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
This commit is contained in:
Yanfeng Liu 2024-07-16 14:41:04 +08:00 committed by Xiang Xiao
parent 08c4686f47
commit d6c67c555f
1 changed files with 4 additions and 0 deletions
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4
arch/risc-v/src/common/riscv_exception_common.S
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@ -231,7 +231,11 @@ return_from_exception:
load_ctx sp
#ifdef CONFIG_ARCH_KERNEL_STACK
REGLOAD sp, REG_SP(sp) /* restore original sp */
#else
addi sp, sp, XCPTCONTEXT_SIZE
#endif
/* Return from exception */