diff options
| -rw-r--r-- | arch/arc/include/asm/entry.h | 17 | ||||
| -rw-r--r-- | arch/arc/kernel/asm-offsets.c | 2 |
2 files changed, 12 insertions, 7 deletions
diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h index 29d0ab6e10f5..ad7860c5ce15 100644 --- a/arch/arc/include/asm/entry.h +++ b/arch/arc/include/asm/entry.h @@ -125,8 +125,6 @@ POP r13 .endm -#define OFF_USER_R25_FROM_R24 (SZ_CALLEE_REGS + SZ_PT_REGS - 8)/4 - /*-------------------------------------------------------------- * Collect User Mode callee regs as struct callee_regs - needed by * fork/do_signal/unaligned-access-emulation. @@ -139,12 +137,13 @@ *-------------------------------------------------------------*/ .macro SAVE_CALLEE_SAVED_USER + mov r12, sp ; save SP as ref to pt_regs SAVE_R13_TO_R24 #ifdef CONFIG_ARC_CURR_IN_REG - ; Retrieve orig r25 and save it on stack - ld.as r12, [sp, OFF_USER_R25_FROM_R24] - st.a r12, [sp, -4] + ; Retrieve orig r25 and save it with rest of callee_regs + ld.as r12, [r12, PT_user_r25] + PUSH r12 #else PUSH r25 #endif @@ -191,12 +190,16 @@ .macro RESTORE_CALLEE_SAVED_USER #ifdef CONFIG_ARC_CURR_IN_REG - ld.ab r12, [sp, 4] - st.as r12, [sp, OFF_USER_R25_FROM_R24] + POP r12 #else POP r25 #endif RESTORE_R24_TO_R13 + + ; SP is back to start of pt_regs +#ifdef CONFIG_ARC_CURR_IN_REG + st.as r12, [sp, PT_user_r25] +#endif .endm /*-------------------------------------------------------------- diff --git a/arch/arc/kernel/asm-offsets.c b/arch/arc/kernel/asm-offsets.c index b9cf23313273..605281f5b301 100644 --- a/arch/arc/kernel/asm-offsets.c +++ b/arch/arc/kernel/asm-offsets.c @@ -60,5 +60,7 @@ int main(void) DEFINE(SZ_CALLEE_REGS, sizeof(struct callee_regs)); DEFINE(SZ_PT_REGS, sizeof(struct pt_regs)); + DEFINE(PT_user_r25, offsetof(struct pt_regs, user_r25)); + return 0; } |