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arm64 fork: FORK_REG_LR,FORK_REG_SP should save the func local stack

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not the last func stack

Signed-off-by: lipengfei28 <lipengfei28@xiaomi.com>
This commit is contained in:
lipengfei28 2024-09-19 12:20:29 +08:00 • committed by Xiang Xiao
parent d4707646d5
commit 6e746ed364
1 changed files with 6 additions and 6 deletions
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12
arch/arm64/src/common/arm64_fork_func.S
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@ -86,9 +86,8 @@ GTEXT(up_fork)
SECTION_FUNC(text, up_fork)
/* Create a stack frame */
mov x0, sp /* Save the value of the stack on entry */
stp x29, x30, [sp]
sub sp, sp, #8 * FORK_REGS_SIZE /* Allocate the structure on the stack */
stp x29, x30, [sp, #8 * FORK_REG_FP] /* Save the FP, LR */
/* CPU registers, save all register*/
@ -106,11 +105,12 @@ SECTION_FUNC(text, up_fork)
stp x22, x23, [sp, #8 * FORK_REG_X22]
stp x24, x25, [sp, #8 * FORK_REG_X24]
stp x26, x27, [sp, #8 * FORK_REG_X26]
stp x28, x29, [sp, #8 * FORK_REG_X28]
str x28, [sp, #8 * FORK_REG_X28]
/* Save the LR, stack pointer */
/* Save the stack pointer */
stp x30, x0, [sp, #8 * FORK_REG_LR]
add x0, sp, #8 * FORK_REGS_SIZE
str x0, [sp, #8 * FORK_REG_SP]
/* Floating point registers */
#ifdef CONFIG_ARCH_FPU
@ -128,7 +128,7 @@ SECTION_FUNC(text, up_fork)
/* Release the stack data and return the value returned by arm64_fork */
ldp x29, x30, [sp, #8 * FORK_REG_FP]
add sp, sp, #8 * FORK_REGS_SIZE
ldp x29, x30, [sp]
ret