1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*Copyright (C) 2015-2024 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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#include "gdbsupport/common-defs.h"
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#include "ppc-linux.h"
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#include "nat/gdb_ptrace.h"
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#include <elf.h>
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#ifdef HAVE_GETAUXVAL
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#include <sys/auxv.h>
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#endif
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#ifdef __powerpc64__
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/* Get the HWCAP from the process of GDB or GDBserver. If success,
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save it in *VALP. */
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static void
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ppc64_host_hwcap (unsigned long *valp)
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{
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#ifdef HAVE_GETAUXVAL
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*valp = getauxval (AT_HWCAP);
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#else
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unsigned long data[2];
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FILE *f = fopen ("/proc/self/auxv", "r");
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if (f == NULL)
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return;
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while (fread (data, sizeof (data), 1, f) > 0)
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{
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if (data[0] == AT_HWCAP)
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{
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*valp = data[1];
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break;
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}
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}
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fclose (f);
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#endif /* HAVE_GETAUXVAL */
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}
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static inline int
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ppc64_64bit_inferior_p (long msr)
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{
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unsigned long ppc_host_hwcap = 0;
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/* Get host's HWCAP to check whether the machine is Book E. */
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ppc64_host_hwcap (&ppc_host_hwcap);
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/* We actually have a 64-bit inferior only if the certain bit of the
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MSR is set. The PowerISA Book III-S MSR is different from the
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PowerISA Book III-E MSR. The Book III-S MSR is 64 bits wide, and
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its MSR[SF] is the bit 0 of a 64-bit value. Book III-E MSR is 32
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bits wide, and its MSR[CM] is the bit 0 of a 32-bit value. */
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if (ppc_host_hwcap & PPC_FEATURE_BOOKE)
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return msr & 0x80000000;
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else
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return msr < 0;
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}
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#endif
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int
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ppc_linux_target_wordsize (int tid)
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{
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gdb_assert (tid != 0);
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int wordsize = 4;
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/* Check for 64-bit inferior process. This is the case when the host is
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64-bit, and in addition the top bit of the MSR register is set. */
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#ifdef __powerpc64__
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long msr;
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errno = 0;
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msr = (long) ptrace (PTRACE_PEEKUSER, tid, PT_MSR * 8, 0);
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if (errno == 0 && ppc64_64bit_inferior_p (msr))
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wordsize = 8;
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#endif
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return wordsize;
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}
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