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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
commit2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac (patch)
tree9c0927ed1d540e5fd704c1f82689870786514655 /arch/arm/kernel/entry-common.S
parent2195d2818c37bdf263865f1e9effccdd9fc5f9d4 (diff)
parent87d721ad7a37b7650dd710c88dd5c6a5bf9fe996 (diff)
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (257 commits) [ARM] Update mach-types ARM: 5636/1: Move vendor enum to AMBA include ARM: Fix pfn_valid() for sparse memory [ARM] orion5x: Add LaCie NAS 2Big Network support [ARM] pxa/sharpsl_pm: zaurus c3000 aka spitz: fix resume ARM: 5686/1: at91: Correct AC97 reset line in at91sam9263ek board ARM: 5640/1: This patch modifies the support of AC97 on the at91sam9263 ek board ARM: 5689/1: Update default config of HP Jornada 700-series machines ARM: 5691/1: fix cache aliasing issues between kmap() and kmap_atomic() with highmem ARM: 5688/1: ks8695_serial: disable_irq() lockup ARM: 5687/1: fix an oops with highmem ARM: 5684/1: Add nuc960 platform to w90x900 ARM: 5683/1: Add nuc950 platform to w90x900 ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform ARM: 5626/1: add suspend/resume functions to amba-pl011 serial driver ARM: 5625/1: fix hard coded 4K resource size in amba bus detection MMC: MMCI: convert realview MMC to use gpiolib ARM: 5685/1: Make MMCI driver compile without gpiolib ARM: implement highpte ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ ... Fix up trivial conflict in arch/arm/kernel/signal.c. It was due to the TIF_NOTIFY_RESUME addition in commit d0420c83f ("KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures") and follow-ups.
Diffstat (limited to 'arch/arm/kernel/entry-common.S')
-rw-r--r--arch/arm/kernel/entry-common.S57
1 files changed, 27 insertions, 30 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 7813ab782fd..807cfebb0f4 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -33,14 +33,7 @@ ret_fast_syscall:
/* perform architecture specific actions before user return */
arch_ret_to_user r1, lr
- @ fast_restore_user_regs
- ldr r1, [sp, #S_OFF + S_PSR] @ get calling cpsr
- ldr lr, [sp, #S_OFF + S_PC]! @ get pc
- msr spsr_cxsf, r1 @ save in spsr_svc
- ldmdb sp, {r1 - lr}^ @ get calling r1 - lr
- mov r0, r0
- add sp, sp, #S_FRAME_SIZE - S_PC
- movs pc, lr @ return & move spsr_svc into cpsr
+ restore_user_regs fast = 1, offset = S_OFF
UNWIND(.fnend )
/*
@@ -73,14 +66,7 @@ no_work_pending:
/* perform architecture specific actions before user return */
arch_ret_to_user r1, lr
- @ slow_restore_user_regs
- ldr r1, [sp, #S_PSR] @ get calling cpsr
- ldr lr, [sp, #S_PC]! @ get pc
- msr spsr_cxsf, r1 @ save in spsr_svc
- ldmdb sp, {r0 - lr}^ @ get calling r0 - lr
- mov r0, r0
- add sp, sp, #S_FRAME_SIZE - S_PC
- movs pc, lr @ return & move spsr_svc into cpsr
+ restore_user_regs fast = 0, offset = 0
ENDPROC(ret_to_user)
/*
@@ -132,6 +118,25 @@ ftrace_call:
#else
+ENTRY(__gnu_mcount_nc)
+ stmdb sp!, {r0-r3, lr}
+ ldr r0, =ftrace_trace_function
+ ldr r2, [r0]
+ adr r0, ftrace_stub
+ cmp r0, r2
+ bne gnu_trace
+ ldmia sp!, {r0-r3, ip, lr}
+ bx ip
+
+gnu_trace:
+ ldr r1, [sp, #20] @ lr of instrumented routine
+ mov r0, lr
+ sub r0, r0, #MCOUNT_INSN_SIZE
+ mov lr, pc
+ mov pc, r2
+ ldmia sp!, {r0-r3, ip, lr}
+ bx ip
+
ENTRY(mcount)
stmdb sp!, {r0-r3, lr}
ldr r0, =ftrace_trace_function
@@ -182,8 +187,10 @@ ftrace_stub:
ENTRY(vector_swi)
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Calling r0 - r12
- add r8, sp, #S_PC
- stmdb r8, {sp, lr}^ @ Calling sp, lr
+ ARM( add r8, sp, #S_PC )
+ ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr
+ THUMB( mov r8, sp )
+ THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr
mrs r8, spsr @ called from non-FIQ mode, so ok.
str lr, [sp, #S_PC] @ Save calling PC
str r8, [sp, #S_PSR] @ Save CPSR
@@ -272,7 +279,7 @@ ENTRY(vector_swi)
bne __sys_trace
cmp scno, #NR_syscalls @ check upper syscall limit
- adr lr, ret_fast_syscall @ return address
+ adr lr, BSYM(ret_fast_syscall) @ return address
ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
add r1, sp, #S_OFF
@@ -293,7 +300,7 @@ __sys_trace:
mov r0, #0 @ trace entry [IP = 0]
bl syscall_trace
- adr lr, __sys_trace_return @ return address
+ adr lr, BSYM(__sys_trace_return) @ return address
mov scno, r0 @ syscall number (possibly new)
add r1, sp, #S_R0 + S_OFF @ pointer to regs
cmp scno, #NR_syscalls @ check upper syscall limit
@@ -373,16 +380,6 @@ sys_clone_wrapper:
b sys_clone
ENDPROC(sys_clone_wrapper)
-sys_sigsuspend_wrapper:
- add r3, sp, #S_OFF
- b sys_sigsuspend
-ENDPROC(sys_sigsuspend_wrapper)
-
-sys_rt_sigsuspend_wrapper:
- add r2, sp, #S_OFF
- b sys_rt_sigsuspend
-ENDPROC(sys_rt_sigsuspend_wrapper)
-
sys_sigreturn_wrapper:
add r0, sp, #S_OFF
b sys_sigreturn