[PATCH v2 19/62] objtool: Fix __pa_symbol() relocation handling

[Josh Poimboeuf]

__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 <jpoim...@kernel.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