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Commit 3e86a8c6 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] Convert sys_execve to function with parameters. 



Use function parameters instead of accessing the pt_regs structure
to get the parameters.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 2d70ca23

arch/s390/kernel/compat_linux.c

+14 −19
Original line number Diff line number Diff line
@@ -443,31 +443,26 @@ sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) 
 * sys32_execve() executes a new program after the asm stub has set

 * things up for us.  This should basically do what I want it to.

 */

asmlinkage long sys32_execve(void)

asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,

			     compat_uptr_t __user *envp)

{

	struct pt_regs *regs = task_pt_regs(current);

	char *filename;

	unsigned long result;

	int rc;



	filename = getname(compat_ptr(regs->orig_gpr2));

	if (IS_ERR(filename)) {

		result = PTR_ERR(filename);

	long rc;



	filename = getname(name);

	rc = PTR_ERR(filename);

	if (IS_ERR(filename))

		return rc;

	rc = compat_do_execve(filename, argv, envp, regs);

	if (rc)

		goto out;

	}

	rc = compat_do_execve(filename, compat_ptr(regs->gprs[3]),

			      compat_ptr(regs->gprs[4]), regs);

	if (rc) {

		result = rc;

		goto out_putname;

	}

	current->thread.fp_regs.fpc=0;

	asm volatile("sfpc %0,0" : : "d" (0));

	result = regs->gprs[2];

out_putname:

        putname(filename);

	rc = regs->gprs[2];

out:

	return result;

	putname(filename);

	return rc;

}

arch/s390/kernel/compat_linux.h

+2 −1
Original line number Diff line number Diff line
@@ -198,7 +198,8 @@ long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, 
			  compat_sigset_t __user *oset, size_t sigsetsize);

long sys32_rt_sigpending(compat_sigset_t __user *set, size_t sigsetsize);

long sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo);

long sys32_execve(void);

long sys32_execve(char __user *name, compat_uptr_t __user *argv,

		  compat_uptr_t __user *envp);

long sys32_init_module(void __user *umod, unsigned long len,

		       const char __user *uargs);

long sys32_delete_module(const char __user *name_user, unsigned int flags);

arch/s390/kernel/compat_wrapper.S

+7 −0
Original line number Diff line number Diff line
@@ -1848,3 +1848,10 @@ sys_clone_wrapper: 
	llgtr	%r4,%r4			# int *

	llgtr	%r5,%r5			# int *

	jg	sys_clone		# branch to system call



	.globl	sys32_execve_wrapper

sys32_execve_wrapper:

	llgtr	%r2,%r2			# char *

	llgtr	%r3,%r3			# compat_uptr_t *

	llgtr	%r4,%r4			# compat_uptr_t *

	jg	sys32_execve		# branch to system call

arch/s390/kernel/entry.h

+2 −1
Original line number Diff line number Diff line
@@ -46,7 +46,8 @@ long sys_clone(unsigned long newsp, unsigned long clone_flags, 
	       int __user *parent_tidptr, int __user *child_tidptr);

long sys_vfork(void);

void execve_tail(void);

long sys_execve(void);

long sys_execve(char __user *name, char __user * __user *argv,

		char __user * __user *envp);

long sys_sigsuspend(int history0, int history1, old_sigset_t mask);

long sys_sigaction(int sig, const struct old_sigaction __user *act,

		   struct old_sigaction __user *oact);

arch/s390/kernel/process.c

+13 −17
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/elfcore.h>

#include <linux/kernel_stat.h>

#include <linux/syscalls.h>

#include <linux/compat.h>

#include <asm/compat.h>

#include <asm/uaccess.h>

#include <asm/pgtable.h>
@@ -268,30 +269,25 @@ asmlinkage void execve_tail(void) 
/*

 * sys_execve() executes a new program.

 */

SYSCALL_DEFINE0(execve)

SYSCALL_DEFINE3(execve, char __user *, name, char __user * __user *, argv,

		char __user * __user *, envp)

{

	struct pt_regs *regs = task_pt_regs(current);

	char *filename;

	unsigned long result;

	int rc;

	long rc;



	filename = getname((char __user *) regs->orig_gpr2);

	if (IS_ERR(filename)) {

		result = PTR_ERR(filename);

	filename = getname(name);

	rc = PTR_ERR(filename);

	if (IS_ERR(filename))

		return rc;

	rc = do_execve(filename, argv, envp, regs);

	if (rc)

		goto out;

	}

	rc = do_execve(filename, (char __user * __user *) regs->gprs[3],

		       (char __user * __user *) regs->gprs[4], regs);

	if (rc) {

		result = rc;

		goto out_putname;

	}

	execve_tail();

	result = regs->gprs[2];

out_putname:

	putname(filename);

	rc = regs->gprs[2];

out:

	return result;

	putname(filename);

	return rc;

}



/*