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The following commit(s) were added to refs/heads/master by this push:
new c1f3245167 riscv-v/fork.S: Fix clobbering of s0 in fork()
c1f3245167 is described below
commit c1f32451679f3f73170f23b0846e12dacff1da60
Author: Ville Juven <[email protected]>
AuthorDate: Thu May 30 15:11:24 2024 +0300
riscv-v/fork.S: Fix clobbering of s0 in fork()
Value of s0 (callee-saved) must be preserved through the call, use
a0 (caller-saved) to calculate the original SP instead.
---
arch/risc-v/src/common/fork.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/risc-v/src/common/fork.S b/arch/risc-v/src/common/fork.S
index 37d4bc9cfe..9070e93b21 100644
--- a/arch/risc-v/src/common/fork.S
+++ b/arch/risc-v/src/common/fork.S
@@ -117,8 +117,8 @@ up_fork:
REGSTORE s0, FORK_S0_OFFSET(sp)
#endif
- addi s0, sp, FORK_SIZEOF
- REGSTORE s0, FORK_SP_OFFSET(sp) /* original SP */
+ addi a0, sp, FORK_SIZEOF
+ REGSTORE a0, FORK_SP_OFFSET(sp) /* original SP */
REGSTORE x1, FORK_RA_OFFSET(sp) /* return address */
/* Floating point registers */
