[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <5d629e496710097c648126f3267d769ca3419baf.1746821544.git.jpoimboe@kernel.org>
Date: Fri, 9 May 2025 13:16:43 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
Petr Mladek <pmladek@...e.com>,
Miroslav Benes <mbenes@...e.cz>,
Joe Lawrence <joe.lawrence@...hat.com>,
live-patching@...r.kernel.org,
Song Liu <song@...nel.org>,
laokz <laokz@...mail.com>,
Jiri Kosina <jikos@...nel.org>,
Marcos Paulo de Souza <mpdesouza@...e.com>,
Weinan Liu <wnliu@...gle.com>,
Fazla Mehrab <a.mehrab@...edance.com>,
Chen Zhongjin <chenzhongjin@...wei.com>,
Puranjay Mohan <puranjay@...nel.org>
Subject: [PATCH v2 19/62] objtool: Fix __pa_symbol() relocation handling
__pa_symbol() generates a relocation which refers to a physical address.
Convert it to back its virtual form before calculating the addend.
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
tools/objtool/arch/x86/decode.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 771ad24e49ee..7bb8bad22b8a 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -68,6 +68,17 @@ bool arch_callee_saved_reg(unsigned char reg)
}
}
+/* Undo the effects of __pa_symbol() if necessary */
+static unsigned long phys_to_virt(unsigned long pa)
+{
+ s64 va = pa;
+
+ if (va > 0)
+ va &= ~(0x80000000);
+
+ return va;
+}
+
s64 arch_insn_adjusted_addend(struct instruction *insn, struct reloc *reloc)
{
s64 addend = reloc_addend(reloc);
@@ -81,7 +92,7 @@ s64 arch_insn_adjusted_addend(struct instruction *insn, struct reloc *reloc)
break;
}
- return addend;
+ return phys_to_virt(addend);
}
unsigned long arch_jump_destination(struct instruction *insn)
--
2.49.0
Powered by blists - more mailing lists