linux-kernel - [RFC v5 03/57] objtool: check: Use arch specific values in restore

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Message-Id: <20200109160300.26150-4-jthierry@redhat.com>
Date:   Thu,  9 Jan 2020 16:02:06 +0000
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org, raphael.gault@....com,
        catalin.marinas@....com, will@...nel.org,
        Julien Thierry <jthierry@...hat.com>
Subject: [RFC v5 03/57] objtool: check: Use arch specific values in restore_reg()

Initial register state is set up by arch specific code. Use the value
the arch code has set when restoring registers from the stack.

Suggested-by: Raphael Gault <raphael.gault@....com>
Signed-off-by: Julien Thierry <jthierry@...hat.com>
---
 tools/objtool/check.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 4784f0f6a3ae..5968e6f08891 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1437,8 +1437,8 @@ static void save_reg(struct insn_state *state, unsigned char reg, int base,
 
 static void restore_reg(struct insn_state *state, unsigned char reg)
 {
-	state->regs[reg].base = CFI_UNDEFINED;
-	state->regs[reg].offset = 0;
+	state->regs[reg].base = initial_func_cfi.regs[reg].base;
+	state->regs[reg].offset = initial_func_cfi.regs[reg].offset;
 }
 
 /*
-- 
2.21.0