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Diffstat (limited to 'arch/sparc/kernel/entry.S')
-rw-r--r--arch/sparc/kernel/entry.S51
1 files changed, 22 insertions, 29 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index dcaa1cf0de40..21fd1a8f47d2 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -806,23 +806,10 @@ sys_nis_syscall:
call c_sys_nis_syscall
mov %l5, %o7
- .align 4
- .globl sys_execve
-sys_execve:
- mov %o7, %l5
- add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
- call sparc_execve
- mov %l5, %o7
-
- .globl sunos_execv
sunos_execv:
- st %g0, [%sp + STACKFRAME_SZ + PT_I2]
-
- call sparc_execve
- add %sp, STACKFRAME_SZ, %o0
-
- b ret_sys_call
- ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl sunos_execv
+ b sys_execve
+ clr %i2
.align 4
.globl sys_sparc_pipe
@@ -959,17 +946,9 @@ flush_patch_four:
.align 4
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
- b syscall_is_too_hard
+ b do_syscall
or %l7, %lo(sys_ni_syscall), %l7
-linux_fast_syscall:
- andn %l7, 3, %l7
- mov %i0, %o0
- mov %i1, %o1
- mov %i2, %o2
- jmpl %l7 + %g0, %g0
- mov %i3, %o3
-
linux_syscall_trace:
add %sp, STACKFRAME_SZ, %o0
call syscall_trace
@@ -991,6 +970,23 @@ ret_from_fork:
b ret_sys_call
ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl ret_from_kernel_thread
+ret_from_kernel_thread:
+ call schedule_tail
+ ld [%g3 + TI_TASK], %o0
+ ld [%sp + STACKFRAME_SZ + PT_G1], %l0
+ call %l0
+ ld [%sp + STACKFRAME_SZ + PT_G2], %o0
+ rd %psr, %l1
+ ld [%sp + STACKFRAME_SZ + PT_PSR], %l0
+ andn %l0, PSR_CWP, %l0
+ nop
+ and %l1, PSR_CWP, %l1
+ or %l0, %l1, %l0
+ st %l0, [%sp + STACKFRAME_SZ + PT_PSR]
+ b ret_sys_call
+ mov 0, %o0
+
/* Linux native system calls enter here... */
.align 4
.globl linux_sparc_syscall
@@ -1002,11 +998,8 @@ linux_sparc_syscall:
bgeu linux_sparc_ni_syscall
sll %g1, 2, %l4
ld [%l7 + %l4], %l7
- andcc %l7, 1, %g0
- bne linux_fast_syscall
- /* Just do first insn from SAVE_ALL in the delay slot */
-syscall_is_too_hard:
+do_syscall:
SAVE_ALL_HEAD
rd %wim, %l3