___standalone-gdb-7.6---MIPS64-Fix-wrong-program-offset-into-bfd-elfcore-not.patch

From 6d4a19f97164f1ccd0152c327f55569214421488 Mon Sep 17 00:00:00 2001
From: Dengcheng Zhu <dzhu@xxxxxxxxxxxx>
Date: Wed, 30 Jan 2019 11:32:41 -0800
Subject: [PATCH] MIPS64: Fix wrong program offset into bfd elfcore note
 description data

This patch is to be applied to STANDALONE gdb-7.6, as opposed to the
embedded gdb-7.6 of the crash tool.

The standalone gdb-7.6 works well with process core dump files generated
by the crash tool extension gcore.

Without this patch, `gdb elf -c core` may throw out the following warning:

warning: core file may not match specified executable file.

This is because bfd/elfcore.h:elf_core_file_matches_executable_p() has:

corename = elf_tdata (core_bfd)->core->program;

where 'program' is set in bfd/elf64-mips.c in case of MIPS64.

Without this patch, the 1st 4 chars of program will be truncated,
rendering corename (->core->program which can also be found in 'execfn'
of the output of `file core`) and execname (ELF file name for the
executable passed to gdb along with the core file) mismatched.

Signed-off-by: Dengcheng Zhu <dzhu@xxxxxxxxxxxx>
---
 bfd/elf64-mips.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bfd/elf64-mips.c b/bfd/elf64-mips.c
index c24a4ee..0a78511 100644
--- a/bfd/elf64-mips.c
+++ b/bfd/elf64-mips.c
@@ -4035,7 +4035,7 @@ elf64_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
 
       case 136:		/* Linux/MIPS - N64 kernel elf_prpsinfo */
 	elf_tdata (abfd)->core->program
-	 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
+	 = _bfd_elfcore_strndup (abfd, note->descdata + 36, 16);
 	elf_tdata (abfd)->core->command
 	 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
     }
-- 
2.17.1