[PATCH] ARM: Use __NR_SYSCALL_BASE and __ARM_NR_BASE in asm code
Don't define our own local constants, but use those already defined
in asm/unistd.h instead.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 55201db..65c58b3 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -111,7 +111,17 @@
ENTRY(vector_swi)
save_user_regs
zero_fp
- get_scno
+
+ /*
+ * Get the system call number.
+ */
+#ifdef CONFIG_ARM_THUMB
+ tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
+ addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
+ ldreq scno, [lr, #-4]
+#else
+ ldr scno, [lr, #-4] @ get SWI instruction
+#endif
arm710_bug_check scno, ip
#ifdef CONFIG_ALIGNMENT_TRAP
@@ -126,7 +136,7 @@
get_thread_info tsk
ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing
bic scno, scno, #0xff000000 @ mask off SWI op-code
- eor scno, scno, #OS_NUMBER << 20 @ check OS number
+ eor scno, scno, #__NR_SYSCALL_BASE @ check OS number
adr tbl, sys_call_table @ load syscall table pointer
tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
bne __sys_trace
@@ -137,8 +147,8 @@
add r1, sp, #S_OFF
2: mov why, #0 @ no longer a real syscall
- cmp scno, #ARMSWI_OFFSET
- eor r0, scno, #OS_NUMBER << 20 @ put OS number back
+ cmp scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE)
+ eor r0, scno, #__NR_SYSCALL_BASE @ put OS number back
bcs arm_syscall
b sys_ni_syscall @ not private func
@@ -183,7 +193,7 @@
@ r5 = syscall table
.type sys_syscall, #function
sys_syscall:
- eor scno, r0, #OS_NUMBER << 20
+ eor scno, r0, #__NR_SYSCALL_BASE
cmp scno, #__NR_syscall - __NR_SYSCALL_BASE
cmpne scno, #NR_syscalls @ check range
stmloia sp, {r5, r6} @ shuffle args
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 9d4d286..0eb7fc9 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -31,13 +31,6 @@
#define PT_TRACESYS 0x00000002
-@ OS version number used in SWIs
-@ RISC OS is 0
-@ RISC iX is 8
-@
-#define OS_NUMBER 9
-#define ARMSWI_OFFSET 0x000f0000
-
@
@ Most of the stack format comes from struct pt_regs, but with
@ the addition of 8 bytes for storing syscall args 5 and 6.
@@ -150,18 +143,3 @@
tbl .req r8 @ syscall table pointer
why .req r8 @ Linux syscall (!= 0)
tsk .req r9 @ current thread_info
-
-/*
- * Get the system call number.
- */
- .macro get_scno
-#ifdef CONFIG_ARM_THUMB
- tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
- addne scno, r7, #OS_NUMBER << 20 @ put OS number in
- ldreq scno, [lr, #-4]
-
-#else
- mask_pc lr, lr
- ldr scno, [lr, #-4] @ get SWI instruction
-#endif
- .endm