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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-04-26 15:18:59 +0100
committerRussell King <rmk@dyn-67.arm.linux.org.uk>2005-04-26 15:18:59 +0100
commit925c8a1a8cb9d7a33a8e39516d7fb679030553fc (patch)
tree47cefc6d9eb3d8d81613e3fbd790a22d1edb23b1 /arch/arm/kernel/entry-header.S
parent1ec42c0c97186fadc48810ccaf2dc573cd957ea1 (diff)
downloadlinux-linaro-stable-925c8a1a8cb9d7a33a8e39516d7fb679030553fc.tar.gz
[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>
Diffstat (limited to 'arch/arm/kernel/entry-header.S')
-rw-r--r--arch/arm/kernel/entry-header.S31
1 files changed, 10 insertions, 21 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 109f4f10d314..9d4d286d3808 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