mirror of https://github.com/hak5/openwrt.git
47 lines
1.9 KiB
Diff
47 lines
1.9 KiB
Diff
From 2fb44600fe784449404c6639de26af8361999ec7 Mon Sep 17 00:00:00 2001
|
|
From: Florian Fainelli <f.fainelli@gmail.com>
|
|
Date: Tue, 18 Jul 2017 16:43:47 -0700
|
|
Subject: [PATCH] um: Fix check for _xstate for older hosts
|
|
|
|
Commit 0a987645672e ("um: Allow building and running on older
|
|
hosts") attempted to check for PTRACE_{GET,SET}REGSET under the premise
|
|
that these ptrace(2) parameters were directly linked with the presence
|
|
of the _xstate structure.
|
|
|
|
After Richard's commit 61e8d462457f ("um: Correctly check for
|
|
PTRACE_GETRESET/SETREGSET") which properly included linux/ptrace.h
|
|
instead of asm/ptrace.h, we could get into the original build failure
|
|
that I reported:
|
|
|
|
arch/x86/um/user-offsets.c: In function 'foo':
|
|
arch/x86/um/user-offsets.c:54: error: invalid application of 'sizeof' to
|
|
incomplete type 'struct _xstate'
|
|
|
|
On this particular host, we do have PTRACE_GETREGSET and
|
|
PTRACE_SETREGSET defined in linux/ptrace.h, but not the structure
|
|
_xstate that should be pulled from the following include chain: signal.h
|
|
-> bits/sigcontext.h.
|
|
|
|
Correctly fix this by checking for FP_XSTATE_MAGIC1 which is the correct
|
|
way to see if struct _xstate is available or not on the host.
|
|
|
|
Fixes: 61e8d462457f ("um: Correctly check for PTRACE_GETRESET/SETREGSET")
|
|
Fixes: 0a987645672e ("um: Allow building and running on older hosts")
|
|
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
Signed-off-by: Richard Weinberger <richard@nod.at>
|
|
---
|
|
arch/x86/um/user-offsets.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
--- a/arch/x86/um/user-offsets.c
|
|
+++ b/arch/x86/um/user-offsets.c
|
|
@@ -50,7 +50,7 @@ void foo(void)
|
|
DEFINE(HOST_GS, GS);
|
|
DEFINE(HOST_ORIG_AX, ORIG_EAX);
|
|
#else
|
|
-#if defined(PTRACE_GETREGSET) && defined(PTRACE_SETREGSET)
|
|
+#ifdef FP_XSTATE_MAGIC1
|
|
DEFINE(HOST_FP_SIZE, sizeof(struct _xstate) / sizeof(unsigned long));
|
|
#else
|
|
DEFINE(HOST_FP_SIZE, sizeof(struct _fpstate) / sizeof(unsigned long));
|