X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fentry_64.S;h=c20c9e7e08dd2a644860dabc206ae1fb843ea173;hb=6fdf5e67fe8d3c83500dad9acae985132c2459a3;hp=c7341e81941cc0e7d6863e317953316c2f045392;hpb=ab1ecbabb1c7b1599b1eb70c291407c557ea4ef3;p=linux-2.6

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index c7341e8194..c20c9e7e08 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -453,6 +453,7 @@ ENTRY(stub_execve)
 	CFI_REGISTER rip, r11
 	SAVE_REST
 	FIXUP_TOP_OF_STACK %r11
+	movq %rsp, %rcx
 	call sys_execve
 	RESTORE_TOP_OF_STACK %r11
 	movq %rax,RAX(%rsp)
@@ -581,16 +582,24 @@ retint_restore_args:	/* return to kernel space */
 	 */
 	TRACE_IRQS_IRETQ
 restore_args:
-	RESTORE_ARGS 0,8,0						
-#ifdef CONFIG_PARAVIRT
+	RESTORE_ARGS 0,8,0
+
+irq_return:
 	INTERRUPT_RETURN
-#endif
+
+	.section __ex_table, "a"
+	.quad irq_return, bad_iret
+	.previous
+
+#ifdef CONFIG_PARAVIRT
 ENTRY(native_iret)
 	iretq
 
 	.section __ex_table,"a"
 	.quad native_iret, bad_iret
 	.previous
+#endif
+
 	.section .fixup,"ax"
 bad_iret:
 	/*
@@ -804,7 +813,7 @@ paranoid_swapgs\trace:
 	SWAPGS_UNSAFE_STACK
 paranoid_restore\trace:
 	RESTORE_ALL 8
-	INTERRUPT_RETURN
+	jmp irq_return
 paranoid_userspace\trace:
 	GET_THREAD_INFO(%rcx)
 	movl threadinfo_flags(%rcx),%ebx
@@ -919,7 +928,7 @@ error_kernelspace:
 	   iret run with kernel gs again, so don't set the user space flag.
 	   B stepping K8s sometimes report an truncated RIP for IRET 
 	   exceptions returning to compat mode. Check for these here too. */
-	leaq native_iret(%rip),%rbp
+	leaq irq_return(%rip),%rbp
 	cmpq %rbp,RIP(%rsp) 
 	je   error_swapgs
 	movl %ebp,%ebp	/* zero extend */
@@ -1028,15 +1037,16 @@ ENDPROC(child_rip)
  *	rdi: name, rsi: argv, rdx: envp
  *
  * We want to fallback into:
- *	extern long sys_execve(char *name, char **argv,char **envp, struct pt_regs regs)
+ *	extern long sys_execve(char *name, char **argv,char **envp, struct pt_regs *regs)
  *
  * do_sys_execve asm fallback arguments:
- *	rdi: name, rsi: argv, rdx: envp, fake frame on the stack
+ *	rdi: name, rsi: argv, rdx: envp, rcx: fake frame on the stack
  */
 ENTRY(kernel_execve)
 	CFI_STARTPROC
 	FAKE_STACK_FRAME $0
 	SAVE_ALL	
+	movq %rsp,%rcx
 	call sys_execve
 	movq %rax, RAX(%rsp)	
 	RESTORE_REST