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gdb: Fix detection of 64-bit PPC inferior in gdbserver

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Fix 64-bit detection according to PowerISA Boot III-S.

https://sourceware.org/ml/gdb-patches/2014-12/msg00239.html
Written by: Yao Qi <yao@codesourcery.com>

(From OE-Core rev: c82557d2bf8c3d8081754561df46cba530103164)

Signed-off-by: Yuanjie Huang <yuanjie.huang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Yuanjie Huang
2015-07-08 11:15:11 +08:00
committed by Richard Purdie
parent 05b02d27d2
commit 925397f6a1
2 changed files with 57 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/gdb/gdb.inc
+1
View File
@@ -4,6 +4,7 @@ inherit gettext
SRC_URI += "file://0002-Change-order-of-CFLAGS.patch \ SRC_URI += "file://0002-Change-order-of-CFLAGS.patch \
file://0003-Add-support-for-Renesas-SH-sh4-architecture.patch \ file://0003-Add-support-for-Renesas-SH-sh4-architecture.patch \
file://fix-detection-of-64-bit-PPC-inferior-in-gdbserver.patch \
" "
#LDFLAGS_append = " -s" #LDFLAGS_append = " -s"
#export CFLAGS_append=" -L${STAGING_LIBDIR}" #export CFLAGS_append=" -L${STAGING_LIBDIR}"
meta/recipes-devtools/gdb/gdb/fix-detection-of-64-bit-PPC-inferior-in-gdbserver.patch
+56
View File
@@ -0,0 +1,56 @@
From 4fe67dbafa1bee679daecc12ed30621d5c2605de Mon Sep 17 00:00:00 2001
From: Yao Qi <yao@codesourcery.com>
Date: Mon, 11 May 2015 10:57:33 +0800
Subject: [PATCH] Fix detection of 64-bit PPC inferior in gdbserver
Issue #16775
* gdbserver/linux-ppc-low.c (ppc_arch_setup): Change variable msr to type
'unsigned long'. Check bit 63 or bit 31 is one.
https://sourceware.org/ml/gdb-patches/2014-12/msg00239.html
Written by: Yao Qi <yao@codesourcery.com>
Upstream-Status: Pending
Signed-off-by: Yuanjie Huang <yuanjie.huang@windriver.com>
---
gdb/gdbserver/linux-ppc-low.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c
index 63d4218..a62cf22 100644
--- a/gdb/gdbserver/linux-ppc-low.c
+++ b/gdb/gdbserver/linux-ppc-low.c
@@ -374,7 +374,7 @@ ppc_arch_setup (void)
{
const struct target_desc *tdesc;
#ifdef __powerpc64__
- long msr;
+ unsigned long msr;
struct regcache *regcache;
/* On a 64-bit host, assume 64-bit inferior process with no
@@ -384,13 +384,16 @@ ppc_arch_setup (void)
current_process ()->tdesc = tdesc;
ppc_hwcap = 0;
- /* Only if the high bit of the MSR is set, we actually have
- a 64-bit inferior. */
+ /* We actually have a 64-bit inferior only if the certain bit of the
+ MSR is set. The PowerISA Book III-S MSR is different from the
+ PowerISA Book III-E MSR. The Book III-S MSR is 64 bits wide, and
+ its MSR[SF] is the bit 0 of a 64-bit value. Book III-E MSR is 32
+ bits wide, and its MSR[CM] is the bit 0 of a 32-bit value. */
regcache = new_register_cache (tdesc);
fetch_inferior_registers (regcache, find_regno (tdesc, "msr"));
collect_register_by_name (regcache, "msr", &msr);
free_register_cache (regcache);
- if (msr < 0)
+ if (msr & 0x8000000080000000)
{
ppc_get_hwcap (&ppc_hwcap);
if (ppc_hwcap & PPC_FEATURE_CELL)
--
1.8.5.2.233.g932f7e4