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authorAl Viro <viro@zeniv.linux.org.uk>2012-09-18 22:33:44 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-10-01 00:53:11 -0400
commit019f96a345b6e23d4e0bc2c136ec5f7500b95834 (patch)
tree25fe5b25d9312962b589f8e02778008414b3e75b /arch/frv
parent460dabab73f2f60198c37ed7bf6d192d23eaa286 (diff)
downloadlinux-linaro-stable-019f96a345b6e23d4e0bc2c136ec5f7500b95834.tar.gz
frv: switch to generic kernel_execve
Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/frv')
-rw-r--r--arch/frv/include/asm/processor.h8
-rw-r--r--arch/frv/include/asm/unistd.h1
-rw-r--r--arch/frv/kernel/Makefile2
-rw-r--r--arch/frv/kernel/entry.S5
-rw-r--r--arch/frv/kernel/kernel_execve.S33
5 files changed, 10 insertions, 39 deletions
diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h
index dccb9d162318..cc86e07a4119 100644
--- a/arch/frv/include/asm/processor.h
+++ b/arch/frv/include/asm/processor.h
@@ -92,14 +92,12 @@ extern struct task_struct *__kernel_current_task;
/*
* do necessary setup to start up a newly executed thread.
- * - need to discard the frame stacked by init() invoking the execve syscall
*/
#define start_thread(_regs, _pc, _usp) \
do { \
- __frame = __kernel_frame0_ptr; \
- __frame->pc = (_pc); \
- __frame->psr &= ~PSR_S; \
- __frame->sp = (_usp); \
+ _regs->pc = (_pc); \
+ _regs->psr &= ~PSR_S; \
+ _regs->sp = (_usp); \
} while(0)
/* Free all resources held by a thread. */
diff --git a/arch/frv/include/asm/unistd.h b/arch/frv/include/asm/unistd.h
index 24b64034866c..b6b07e55e473 100644
--- a/arch/frv/include/asm/unistd.h
+++ b/arch/frv/include/asm/unistd.h
@@ -373,6 +373,7 @@
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_KERNEL_EXECVE
/*
* "Conditional" syscalls
diff --git a/arch/frv/kernel/Makefile b/arch/frv/kernel/Makefile
index 7b10bc19106e..3cbb3294b9f9 100644
--- a/arch/frv/kernel/Makefile
+++ b/arch/frv/kernel/Makefile
@@ -8,7 +8,7 @@ heads-$(CONFIG_MMU) := head-mmu-fr451.o
extra-y:= head.o vmlinux.lds
obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o \
- kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \
+ process.o traps.o ptrace.o signal.o dma.o \
sys_frv.o time.o setup.o frv_ksyms.o \
debug-stub.o irq.o sleep.o uaccess.o
diff --git a/arch/frv/kernel/entry.S b/arch/frv/kernel/entry.S
index 7a886130ca10..002732960315 100644
--- a/arch/frv/kernel/entry.S
+++ b/arch/frv/kernel/entry.S
@@ -871,6 +871,11 @@ ret_from_kernel_thread:
calll @(gr21,gr0)
bra sys_exit
+ .globl ret_from_kernel_execve
+ret_from_kernel_execve:
+ ori gr28,0,sp
+ bra __syscall_exit
+
###################################################################################################
#
# Return to user mode is not as complex as all this looks,
diff --git a/arch/frv/kernel/kernel_execve.S b/arch/frv/kernel/kernel_execve.S
deleted file mode 100644
index 9b074a16a052..000000000000
--- a/arch/frv/kernel/kernel_execve.S
+++ /dev/null
@@ -1,33 +0,0 @@
-/* in-kernel program execution
- *
- * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/linkage.h>
-#include <asm/unistd.h>
-
-###############################################################################
-#
-# Do a system call from kernel instead of calling sys_execve so we end up with
-# proper pt_regs.
-#
-# int kernel_execve(const char *filename, char *const argv[], char *const envp[])
-#
-# On entry: GR8/GR9/GR10: arguments to function
-# On return: GR8: syscall return.
-#
-###############################################################################
- .globl kernel_execve
- .type kernel_execve,@function
-kernel_execve:
- setlos __NR_execve,gr7
- tira gr0,#0
- bralr
-
- .size kernel_execve,.-kernel_execve