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From: tip-bot for Josh Poimboeuf <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: boris.ostrovsky@oracle.com, tglx@linutronix.de,
	torvalds@linux-foundation.org, jgross@suse.com,
	linux-kernel@vger.kernel.org, mingo@kernel.org, luto@kernel.org,
	peterz@infradead.org, jslaby@suse.cz, jpoimboe@redhat.com,
	hpa@zytor.com
Subject: [tip:core/objtool] x86/xen: Add unwind hint annotations
Date: Thu, 28 Sep 2017 03:57:18 -0700	[thread overview]
Message-ID: <tip-abbe1cac6214d81d2f4e149aba64a8760703144e@git.kernel.org> (raw)
In-Reply-To: <70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066.git.jpoimboe@redhat.com>

Commit-ID:  abbe1cac6214d81d2f4e149aba64a8760703144e
Gitweb:     https://git.kernel.org/tip/abbe1cac6214d81d2f4e149aba64a8760703144e
Author:     Josh Poimboeuf <jpoimboe@redhat.com>
AuthorDate: Mon, 18 Sep 2017 21:43:36 -0500
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 28 Sep 2017 09:39:03 +0200

x86/xen: Add unwind hint annotations

Add unwind hint annotations to the xen head code so the ORC unwinder can
read head_64.o.

hypercall_page needs empty annotations at 32-byte intervals to match the
'xen_hypercall_*' ELF functions at those locations.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/xen/xen-head.S | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 9753225..124941d 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -9,6 +9,7 @@
 #include <asm/boot.h>
 #include <asm/asm.h>
 #include <asm/page_types.h>
+#include <asm/unwind_hints.h>
 
 #include <xen/interface/elfnote.h>
 #include <xen/interface/features.h>
@@ -19,6 +20,7 @@
 #ifdef CONFIG_XEN_PV
 	__INIT
 ENTRY(startup_xen)
+	UNWIND_HINT_EMPTY
 	cld
 
 	/* Clear .bss */
@@ -40,7 +42,10 @@ END(startup_xen)
 .pushsection .text
 	.balign PAGE_SIZE
 ENTRY(hypercall_page)
-	.skip PAGE_SIZE
+	.rept (PAGE_SIZE / 32)
+		UNWIND_HINT_EMPTY
+		.skip 32
+	.endr
 
 #define HYPERCALL(n) \
 	.equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \

  reply	other threads:[~2017-09-28 11:00 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-19  2:43 [PATCH v2 0/8] x86/asm: Add unwind hint annotations to head code Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 1/8] objtool: Don't report end of section error after an empty unwind hint Josh Poimboeuf
2017-09-28 10:54   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 2/8] x86/head: Remove confusing comment Josh Poimboeuf
2017-09-28 10:55   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 3/8] x86/head: Remove unused 'bad_address' code Josh Poimboeuf
2017-09-28 10:55   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 4/8] x86/head: Fix head ELF function annotations Josh Poimboeuf
2017-09-28 10:56   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 5/8] x86/boot: Annotate verify_cpu() as a callable function Josh Poimboeuf
2017-09-28 10:56   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 6/8] x86/xen: Fix xen head ELF annotations Josh Poimboeuf
2017-09-28 10:56   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf
2017-09-19  2:43 ` [PATCH v2 7/8] x86/xen: Add unwind hint annotations Josh Poimboeuf
2017-09-28 10:57   ` tip-bot for Josh Poimboeuf [this message]
2017-09-19  2:43 ` [PATCH v2 8/8] x86/head: " Josh Poimboeuf
2017-09-28 10:57   ` [tip:core/objtool] " tip-bot for Josh Poimboeuf

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