mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-08-27 13:01:23 -04:00
lizhenlin
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/* Populate process registers from a linux perf_events sample.
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Copyright (C) 2025 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#if (defined __i386__ || defined __x86_64__) && defined(__linux__)
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# include <linux/perf_event.h>
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# include <asm/perf_regs.h>
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#endif
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#define BACKEND i386_
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#include "libebl_CPU.h"
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#include "libebl_PERF_FLAGS.h"
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#if (defined __i386__ || defined __x86_64__) && defined(__linux__)
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# include "linux-perf-regs.c"
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# include "x86_initreg_sample.c"
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#endif
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/* Register ordering cf. linux arch/x86/include/uapi/asm/perf_regs.h,
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enum perf_event_x86_regs: */
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Dwarf_Word
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i386_sample_base_addr (const Dwarf_Word *regs, uint32_t n_regs,
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uint64_t regs_mask,
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/* XXX hypothetically needed if abi varies
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between samples in the same process;
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not needed on x86 */
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uint32_t abi __attribute__((unused)))
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{
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#if (!defined __i386__ && !defined __x86_64__) || !defined(__linux__)
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(void)regs;
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(void)n_regs;
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(void)regs_mask;
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return 0;
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#else /* __i386__ || __x86_64__ */
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(void)regs;
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(void)n_regs;
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(void)regs_mask;
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return perf_sample_find_reg (regs, n_regs, regs_mask,
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7 /* index into perf_event_x86_regs */);
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#endif
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}
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Dwarf_Word
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i386_sample_pc (const Dwarf_Word *regs, uint32_t n_regs,
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uint64_t regs_mask,
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uint32_t abi __attribute__((unused)))
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{
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#if (!defined __i386__ && !defined __x86_64__) || !defined(__linux__)
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(void)regs;
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(void)n_regs;
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(void)regs_mask;
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return 0;
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#else /* __i386__ || __x86_64__ */
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return perf_sample_find_reg (regs, n_regs, regs_mask,
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8 /* index into perf_event_x86_regs */);
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#endif
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}
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bool
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i386_set_initial_registers_sample (const Dwarf_Word *regs, uint32_t n_regs,
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uint64_t regs_mask, uint32_t abi,
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ebl_tid_registers_t *setfunc,
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void *arg)
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{
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#if (!defined __i386__ && !defined __x86_64__) || !defined(__linux__)
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(void)regs;
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(void)n_regs;
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(void)regs_mask;
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(void)abi;
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(void)setfunc;
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(void)arg;
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return false;
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#else /* __i386__ || __x86_64__ */
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Dwarf_Word dwarf_regs[9];
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if (!x86_set_initial_registers_sample (regs, n_regs, regs_mask,
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abi, dwarf_regs, 9))
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return false;
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return setfunc (0, 9, dwarf_regs, arg);
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#endif
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}
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