tile: switch to generic sys_execve()

Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/tile/include/asm/elf.h

@@ -148,6 +148,7 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 #define compat_start_thread(regs, ip, usp) do { \
 		regs->pc = ptr_to_compat_reg((void *)(ip)); \
 		regs->sp = ptr_to_compat_reg((void *)(usp)); \
+		single_step_execve();	\
 	} while (0)
 
 /*

arch/tile/include/asm/processor.h

@@ -211,6 +211,7 @@ static inline void start_thread(struct pt_regs *regs,
 {
 	regs->pc = pc;
 	regs->sp = usp;
+	single_step_execve();
 }
 
 /* Free all resources held by a thread. */

arch/tile/include/asm/syscalls.h

@@ -68,9 +68,10 @@ long _sys_sigaltstack(const stack_t __user *, stack_t __user *);
 long _sys_rt_sigreturn(void);
 long _sys_clone(unsigned long clone_flags, unsigned long newsp,
 		void __user *parent_tid, void __user *child_tid);
-long _sys_execve(const char __user *filename,
+long sys_execve(const char __user *filename,
 		 const char __user *const __user *argv,
 		 const char __user *const __user *envp);
+#define sys_execve sys_execve
 
 #include <asm-generic/syscalls.h>
 

arch/tile/include/asm/unistd.h

@@ -16,4 +16,5 @@
 #define __ARCH_WANT_SYS_LLSEEK
 #endif
 #define __ARCH_WANT_SYS_NEWFSTATAT
+#define __ARCH_WANT_SYS_EXECVE
 #include <uapi/asm/unistd.h>

arch/tile/kernel/intvec_32.S

@@ -1476,7 +1476,6 @@ STD_ENTRY_LOCAL(bad_intr)
 	};                                              \
 	STD_ENDPROC(_##x)
 
-PTREGS_SYSCALL(sys_execve, r3)
 PTREGS_SYSCALL(sys_sigaltstack, r2)
 PTREGS_SYSCALL_SIGRETURN(sys_rt_sigreturn, r0)
 PTREGS_SYSCALL(sys_cmpxchg_badaddr, r1)

arch/tile/kernel/intvec_64.S

@@ -1205,7 +1205,6 @@ STD_ENTRY_LOCAL(bad_intr)
 	};                                              \
 	STD_ENDPROC(_##x)
 
-PTREGS_SYSCALL(sys_execve, r3)
 PTREGS_SYSCALL(sys_sigaltstack, r2)
 PTREGS_SYSCALL_SIGRETURN(sys_rt_sigreturn, r0)
 #ifdef CONFIG_COMPAT

arch/tile/kernel/process.c

@@ -594,51 +594,6 @@ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
 		       parent_tidptr, child_tidptr);
 }
 
-/*
- * sys_execve() executes a new program.
- */
-SYSCALL_DEFINE4(execve, const char __user *, path,
-		const char __user *const __user *, argv,
-		const char __user *const __user *, envp,
-		struct pt_regs *, regs)
-{
-	long error;
-	struct filename *filename;
-
-	filename = getname(path);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		goto out;
-	error = do_execve(filename->name, argv, envp, regs);
-	putname(filename);
-	if (error == 0)
-		single_step_execve();
-out:
-	return error;
-}
-
-#ifdef CONFIG_COMPAT
-long compat_sys_execve(const char __user *path,
-		       compat_uptr_t __user *argv,
-		       compat_uptr_t __user *envp)
-{
-	long error;
-	struct filename *filename;
-
-	filename = getname(path);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		goto out;
-	error = compat_do_execve(filename->name, argv, envp,
-				 current_pt_regs());
-	putname(filename);
-	if (error == 0)
-		single_step_execve();
-out:
-	return error;
-}
-#endif
-
 unsigned long get_wchan(struct task_struct *p)
 {
 	struct KBacktraceIterator kbt;

arch/tile/kernel/sys.c

@@ -107,7 +107,6 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
 #endif
 
 /* Call the trampolines to manage pt_regs where necessary. */
-#define sys_execve _sys_execve
 #define sys_sigaltstack _sys_sigaltstack
 #define sys_rt_sigreturn _sys_rt_sigreturn
 #define sys_clone _sys_clone