cdf436294f
This patch is to teach both GDB and GDBServer to detect 64-bit inferior correctly. We find a problem that GDBServer is unable to detect on a e5500 core processor. Current GDBServer assumes that MSR is a 64-bit register, but MSR is a 32-bit register in Book III-E. This patch is to fix this problem by checking the right bit in MSR, in order to handle both Book III-S and Book III-E. In order to detect Book III-S and Book III-E, we check the PPC_FEATURE_BOOKE from the host's HWCAP (by getauxval on glibc >= 2.16. If getauxval doesn't exist, we implement the fallback by parsing /proc/self/auxv), because it should an invariant on the same machine cross different processes. In order to share code, I add nat/ppc-linux.c for both GDB and GDBserver side. gdb: 2015-01-14 Yao Qi <yao@codesourcery.com> * Makefile.in (ppc-linux.o): New rule. * config/powerpc/ppc64-linux.mh (NATDEPFILES): Add ppc-linux.o. * configure.ac: AC_CHECK_FUNCS(getauxval). * config.in: Re-generated. * configure: Re-generated. * nat/ppc-linux.h [__powerpc64__] (ppc64_64bit_inferior_p): Declare. * nat/ppc-linux.c: New file. * ppc-linux-nat.c (ppc_linux_target_wordsize) [__powerpc64__]: Call ppc64_64bit_inferior_p. gdb/gdbserver: 2015-01-14 Yao Qi <yao@codesourcery.com> * Makefile.in (SFILES): Add nat/ppc-linux.c. (ppc-linux.o): New rule. * configure.srv (powerpc*-*-linux*): Add ppc-linux.o. * configure.ac: AC_CHECK_FUNCS(getauxval). * config.in: Re-generated. * configure: Re-generated. * linux-ppc-low.c (ppc_arch_setup) [__powerpc64__]: Call ppc64_64bit_inferior_p
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/* Copyright (C) 1995-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef PPC_LINUX_H
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#define PPC_LINUX_H 1
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#include <asm/ptrace.h>
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#include <asm/cputable.h>
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/* This sometimes isn't defined. */
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#ifndef PT_ORIG_R3
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#define PT_ORIG_R3 34
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#endif
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#ifndef PT_TRAP
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#define PT_TRAP 40
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#endif
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/* The PPC_FEATURE_* defines should be provided by <asm/cputable.h>.
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If they aren't, we can provide them ourselves (their values are fixed
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because they are part of the kernel ABI). They are used in the AT_HWCAP
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entry of the AUXV. */
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#ifndef PPC_FEATURE_CELL
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#define PPC_FEATURE_CELL 0x00010000
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#endif
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#ifndef PPC_FEATURE_BOOKE
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#define PPC_FEATURE_BOOKE 0x00008000
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#endif
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#ifndef PPC_FEATURE_HAS_DFP
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#define PPC_FEATURE_HAS_DFP 0x00000400 /* Decimal Floating Point. */
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#endif
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#ifndef PPC_FEATURE_HAS_VSX
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#define PPC_FEATURE_HAS_VSX 0x00000080
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#endif
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#ifndef PPC_FEATURE_HAS_ALTIVEC
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#define PPC_FEATURE_HAS_ALTIVEC 0x10000000
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#endif
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#ifndef PPC_FEATURE_HAS_SPE
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#define PPC_FEATURE_HAS_SPE 0x00800000
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#endif
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/* Glibc's headers don't define PTRACE_GETVRREGS so we cannot use a
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configure time check. Some older glibc's (for instance 2.2.1)
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don't have a specific powerpc version of ptrace.h, and fall back on
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a generic one. In such cases, sys/ptrace.h defines
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PTRACE_GETFPXREGS and PTRACE_SETFPXREGS to the same numbers that
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ppc kernel's asm/ptrace.h defines PTRACE_GETVRREGS and
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PTRACE_SETVRREGS to be. This also makes a configury check pretty
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much useless. */
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/* These definitions should really come from the glibc header files,
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but Glibc doesn't know about the vrregs yet. */
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#ifndef PTRACE_GETVRREGS
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#define PTRACE_GETVRREGS 18
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#define PTRACE_SETVRREGS 19
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#endif
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/* PTRACE requests for POWER7 VSX registers. */
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#ifndef PTRACE_GETVSXREGS
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#define PTRACE_GETVSXREGS 27
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#define PTRACE_SETVSXREGS 28
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#endif
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/* Similarly for the ptrace requests for getting / setting the SPE
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registers (ev0 -- ev31, acc, and spefscr). See the description of
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gdb_evrregset_t for details. */
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#ifndef PTRACE_GETEVRREGS
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#define PTRACE_GETEVRREGS 20
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#define PTRACE_SETEVRREGS 21
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#endif
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#ifdef __powerpc64__
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/* Return whether the inferior is 64bit or not by checking certain bit
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in MSR. */
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int ppc64_64bit_inferior_p (long msr);
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#endif
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#endif
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