frv: switch to generic kernel_execve

Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
git-mirror · Oct 1, 2012 · 019f96a · 019f96a
1 parent 460daba
commit 019f96a
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Showing 5 changed files with 10 additions and 39 deletions.
diff --git 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
@@ -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
@@ -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
@@ -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