Commit 65f22a90 authored by Al Viro's avatar Al Viro
Browse files

s390: fold execve_tail() into start_thread(), convert to generic sys_execve() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 1f02ab4a

arch/s390/include/asm/processor.h

+3 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ static inline void get_cpu_id(struct cpuid *ptr) 
extern void s390_adjust_jiffies(void);

extern const struct seq_operations cpuinfo_op;

extern int sysctl_ieee_emulation_warnings;

extern void execve_tail(void);



/*

 * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
@@ -114,6 +115,7 @@ struct stack_frame { 
	regs->psw.mask	= psw_user_bits | PSW_MASK_EA | PSW_MASK_BA;	\

	regs->psw.addr	= new_psw | PSW_ADDR_AMODE;			\

	regs->gprs[15]	= new_stackp;					\

	execve_tail();							\

} while (0)



#define start_thread31(regs, new_psw, new_stackp) do {			\
@@ -123,6 +125,7 @@ struct stack_frame { 
	__tlb_flush_mm(current->mm);					\

	crst_table_downgrade(current->mm, 1UL << 31);			\

	update_mm(current->mm, current);				\

	execve_tail();							\

} while (0)



/* Forward declaration, a strange C thing */

arch/s390/include/asm/unistd.h

+1 −0
Original line number Diff line number Diff line
@@ -415,6 +415,7 @@ 
#   define __ARCH_WANT_COMPAT_SYS_TIME

#   define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND

# endif

#define __ARCH_WANT_SYS_EXECVE



/*

 * "Conditional" syscalls

arch/s390/kernel/compat_linux.c

+0 −26
Original line number Diff line number Diff line
@@ -420,32 +420,6 @@ sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) 
	return ret;

}



/*

 * 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(const char __user *name, compat_uptr_t __user *argv,

			     compat_uptr_t __user *envp)

{

	struct pt_regs *regs = task_pt_regs(current);

	char *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;

	current->thread.fp_regs.fpc=0;

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

	rc = regs->gprs[2];

out:

	putname(filename);

	return rc;

}



asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,

				size_t count, u32 poshi, u32 poslo)

{

arch/s390/kernel/compat_linux.h

+0 −2
Original line number Diff line number Diff line
@@ -193,8 +193,6 @@ 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(const 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

+1 −1
Original line number Diff line number Diff line
@@ -1576,7 +1576,7 @@ ENTRY(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

	jg	compat_sys_execve	# branch to system call



ENTRY(sys_fanotify_init_wrapper)

	llgfr	%r2,%r2			# unsigned int