From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 14 Oct 2012 19:53:04 +0000 (-0400)
Subject: ia64: switch to generic sys_execve()
X-Git-Tag: firefly_0821_release~3680^2~1355^2~54^2~11^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=71b4ecc3d8056b2ed5cbc0d77af13fed38bcac49;p=firefly-linux-kernel-4.4.55.git

ia64: switch to generic sys_execve()

Acked-by: Tony Luck <tony.luck@intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h
index 8b3ff2f5b861..1574bca86138 100644
--- a/arch/ia64/include/asm/unistd.h
+++ b/arch/ia64/include/asm/unistd.h
@@ -29,6 +29,7 @@
 
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
 
 #if !defined(__ASSEMBLY__) && !defined(ASSEMBLER)
 
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 0dea684e1905..940a67263629 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -61,14 +61,13 @@ ENTRY(ia64_execve)
 	 * Allocate 8 input registers since ptrace() may clobber them
 	 */
 	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
-	alloc loc1=ar.pfs,8,2,4,0
+	alloc loc1=ar.pfs,8,2,3,0
 	mov loc0=rp
 	.body
 	mov out0=in0			// filename
 	;;				// stop bit between alloc and call
 	mov out1=in1			// argv
 	mov out2=in2			// envp
-	add out3=16,sp			// regs
 	br.call.sptk.many rp=sys_execve
 .ret0:
 	cmp4.ge p6,p7=r8,r0
@@ -76,7 +75,6 @@ ENTRY(ia64_execve)
 	sxt4 r8=r8			// return 64-bit result
 	;;
 	stf.spill [sp]=f0
-(p6)	cmp.ne pKStk,pUStk=r0,r0	// a successful execve() lands us in user-mode...
 	mov rp=loc0
 (p6)	mov ar.pfs=r0			// clear ar.pfs on success
 (p7)	br.ret.sptk.many rp
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 37686dbfd264..25543a295ad9 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -617,25 +617,6 @@ dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
 	return 1;	/* f0-f31 are always valid so we always return 1 */
 }
 
-long
-sys_execve (const char __user *filename,
-	    const char __user *const __user *argv,
-	    const char __user *const __user *envp,
-	    struct pt_regs *regs)
-{
-	struct filename *fname;
-	int error;
-
-	fname = getname(filename);
-	error = PTR_ERR(fname);
-	if (IS_ERR(fname))
-		goto out;
-	error = do_execve(fname->name, argv, envp, regs);
-	putname(fname);
-out:
-	return error;
-}
-
 /*
  * Flush thread state.  This is called when a thread does an execve().
  */