[PATCH] ARM: pt_regs offsets
Generate pt_regs S_xx offsets from the structure itself instead
of #defining them.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 99d4325..c1ff4d1 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -64,6 +64,26 @@
DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate));
DEFINE(TI_IWMMXT_STATE, (offsetof(struct thread_info, fpstate)+4)&~7);
BLANK();
+ DEFINE(S_R0, offsetof(struct pt_regs, ARM_r0));
+ DEFINE(S_R1, offsetof(struct pt_regs, ARM_r1));
+ DEFINE(S_R2, offsetof(struct pt_regs, ARM_r2));
+ DEFINE(S_R3, offsetof(struct pt_regs, ARM_r3));
+ DEFINE(S_R4, offsetof(struct pt_regs, ARM_r4));
+ DEFINE(S_R5, offsetof(struct pt_regs, ARM_r5));
+ DEFINE(S_R6, offsetof(struct pt_regs, ARM_r6));
+ DEFINE(S_R7, offsetof(struct pt_regs, ARM_r7));
+ DEFINE(S_R8, offsetof(struct pt_regs, ARM_r8));
+ DEFINE(S_R9, offsetof(struct pt_regs, ARM_r9));
+ DEFINE(S_R10, offsetof(struct pt_regs, ARM_r10));
+ DEFINE(S_FP, offsetof(struct pt_regs, ARM_fp));
+ DEFINE(S_IP, offsetof(struct pt_regs, ARM_ip));
+ DEFINE(S_SP, offsetof(struct pt_regs, ARM_sp));
+ DEFINE(S_LR, offsetof(struct pt_regs, ARM_lr));
+ DEFINE(S_PC, offsetof(struct pt_regs, ARM_pc));
+ DEFINE(S_PSR, offsetof(struct pt_regs, ARM_cpsr));
+ DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0));
+ DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
+ BLANK();
#if __LINUX_ARM_ARCH__ >= 6
DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id));
BLANK();
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 0cd9f7b..55201db 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -15,13 +15,6 @@
#include "entry-header.S"
-/*
- * We rely on the fact that R0 is at the bottom of the stack (due to
- * slow/fast restore user regs).
- */
-#if S_R0 != 0
-#error "Please fix"
-#endif
.align 5
/*
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 109f4f1..9d4d286 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -39,30 +39,19 @@
#define ARMSWI_OFFSET 0x000f0000
@
-@ Stack format (ensured by USER_* and SVC_*)
+@ Most of the stack format comes from struct pt_regs, but with
+@ the addition of 8 bytes for storing syscall args 5 and 6.
@
-#define S_FRAME_SIZE 72
-#define S_OLD_R0 68
-#define S_PSR 64
-
-#define S_PC 60
-#define S_LR 56
-#define S_SP 52
-#define S_IP 48
-#define S_FP 44
-#define S_R10 40
-#define S_R9 36
-#define S_R8 32
-#define S_R7 28
-#define S_R6 24
-#define S_R5 20
-#define S_R4 16
-#define S_R3 12
-#define S_R2 8
-#define S_R1 4
-#define S_R0 0
#define S_OFF 8
+/*
+ * The SWI code relies on the fact that R0 is at the bottom of the stack
+ * (due to slow/fast restore user regs).
+ */
+#if S_R0 != 0
+#error "Please fix"
+#endif
+
#if __LINUX_ARM_ARCH__ >= 6
.macro disable_irq
cpsid i