136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
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* This file is part of ltrace.
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* Copyright (C) 2012,2013,2014 Petr Machata
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* Copyright (C) 2006 Paul Gilliam
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* Copyright (C) 2002,2004 Juan Cespedes
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program 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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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef LTRACE_PPC_ARCH_H
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#define LTRACE_PPC_ARCH_H
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#include <gelf.h>
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#define BREAKPOINT_VALUE { 0x7f, 0xe0, 0x00, 0x08 }
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#define BREAKPOINT_LENGTH 4
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#define DECR_PC_AFTER_BREAK 0
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#define LT_ELFCLASS ELFCLASS32
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#define LT_ELF_MACHINE EM_PPC
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#ifdef __powerpc64__ // Says 'ltrace' is 64 bits, says nothing about target.
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#define LT_ELFCLASS2 ELFCLASS64
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#define LT_ELF_MACHINE2 EM_PPC64
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#define ARCH_SUPPORTS_OPD
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#endif
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#define ARCH_HAVE_SW_SINGLESTEP
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#define ARCH_HAVE_ADD_PLT_ENTRY
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#define ARCH_HAVE_ADD_FUNC_ENTRY
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#define ARCH_HAVE_TRANSLATE_ADDRESS
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#define ARCH_HAVE_DYNLINK_DONE
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#define ARCH_HAVE_FETCH_ARG
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#define ARCH_ENDIAN_BIG
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#define ARCH_HAVE_SIZEOF
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#define ARCH_HAVE_ALIGNOF
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struct library_symbol;
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#define ARCH_HAVE_LTELF_DATA
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struct arch_ltelf_data {
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GElf_Addr plt_stub_vma;
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struct library_symbol *stubs;
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Elf_Data *opd_data;
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GElf_Addr opd_base;
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GElf_Xword opd_size;
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int secure_plt;
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Elf_Data *reladyn;
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size_t reladyn_count;
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};
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#define ARCH_HAVE_LIBRARY_DATA
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struct arch_library_data {
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GElf_Addr pltgot_addr;
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int bss_plt_prelinked;
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};
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enum ppc64_plt_type {
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/* Either a non-PLT symbol, or PPC32 symbol. */
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PPC_DEFAULT = 0,
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/* PPC64 STUB, never resolved. */
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PPC64_PLT_STUB,
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/* Unresolved PLT symbol (.plt contains PLT address). */
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PPC_PLT_UNRESOLVED,
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/* Resolved PLT symbol. The corresponding .plt slot contained
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* target address, which was changed to the address of
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* corresponding PLT entry. The original is now saved in
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* RESOLVED_VALUE. */
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PPC_PLT_RESOLVED,
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/* Very similar to PPC_PLT_UNRESOLVED, but for JMP_IREL
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* slots. */
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PPC_PLT_IRELATIVE,
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/* Transitional state before the breakpoint is enabled. */
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PPC_PLT_NEED_UNRESOLVE,
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};
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#define ARCH_HAVE_LIBRARY_SYMBOL_DATA
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struct ppc_unresolve_data;
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struct arch_library_symbol_data {
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enum ppc64_plt_type type;
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/* State Contents
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*
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* PPC_DEFAULT N/A
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* PPC64_PLT_STUB N/A
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* PPC_PLT_UNRESOLVED PLT entry address.
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* PPC_PLT_IRELATIVE Likewise.
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* PPC_PLT_RESOLVED The original value the slot was resolved to.
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* PPC_PLT_NEED_UNRESOLVE DATA.
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*/
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union {
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GElf_Addr resolved_value;
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struct ppc_unresolve_data *data;
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};
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/* Address of corresponding slot in .plt. */
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GElf_Addr plt_slot_addr;
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};
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#define ARCH_HAVE_BREAKPOINT_DATA
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struct arch_breakpoint_data {
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/* This is where we hide symbol for IRELATIVE breakpoint for
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* the first time that it hits. This is NULL for normal
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* breakpoints. */
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struct library_symbol *irel_libsym;
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};
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#define ARCH_HAVE_PROCESS_DATA
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struct arch_process_data {
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/* Breakpoint that hits when the dynamic linker is about to
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* update a .plt slot. NULL before that address is known. */
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struct breakpoint *dl_plt_update_bp;
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/* PLT update breakpoint looks here for the handler. */
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struct process_stopping_handler *handler;
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};
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#endif /* LTRACE_PPC_ARCH_H */
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