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082f9298a1
Valgrind aspects, to match vex r3124. See bug 339778 - Linux/TileGx platform support to Valgrind git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15080
113 lines
4.8 KiB
C
113 lines
4.8 KiB
C
/* Definitions of interface to the "low" (arch specific) functions
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needed for interfacing the Valgrind gdbserver with the Valgrind
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guest.
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Copyright (C) 2011, 2012
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Free Software Foundation, Inc.
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This file has been inspired from a file that is part of GDB.
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It has been modified to integrate it in valgrind
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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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef VALGRIND_LOW_H
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#define VALGRIND_LOW_H
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#include "pub_core_basics.h" // ThreadId
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#include "server.h" // CORE_ADDR
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/* defines the characteristics of the "low" valgrind target architecture.
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In other words, struct valgrind_target_ops defines the functions and
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data which are specific to the architecture (x86 or amd64 or
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ppc32 or ...). */
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struct valgrind_target_ops
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{
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int num_regs;
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struct reg *reg_defs;
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int stack_pointer_regno;
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/* register number of the stack pointer register */
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/* transfer the register regno from/to valgrind (guest state)
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to/from buf
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according to transfer_direction.
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*mod set to True if destination content is modified by the transfer
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otherwise it is set to False. */
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void (*transfer_register) (ThreadId tid, int regno, void * buf,
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transfer_direction dir, int size, Bool *mod);
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CORE_ADDR (*get_pc) (void);
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void (*set_pc) (CORE_ADDR newpc);
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/* What string to report to GDB when it asks for the architecture,
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or NULL not to answer. */
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const char *arch_string;
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/* Returns the target xml description of the set of registers.
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For some architectures (e.g. arm), it is mandatory
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to give a description of the registers, otherwise
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gdb does not understand the reply to the 'g' packet
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(which is used to get the registers).
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If shadow_mode, returns a target xml description
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including the two shadow registers sets.
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This is mandatory to use the option --vgdb-shadow-registers=yes.
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Returns NULL if there is no target xml file*/
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const char* (*target_xml) (Bool shadow_mode);
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/* Returns the address in the thread control block where dtv is found.
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Return NULL if an error occurs or no support for tls/dtv is available.
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Note that the addressability of the returned result has not been
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verified. In other words, target_get_dtv just adds some magic
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offset to the arch specific thread register or thread pointer or ...
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The implementation of this is of course depending on the arch
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but also depends on the way pthread lib arranges its data.
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For background info about tls handling, read
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'ELF Handling For Thread-Local Storage'
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http://www.akkadia.org/drepper/tls.pdf
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(slightly obsolete e.g. the size of a dtv entry is 2 words now).
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The reference is the glibc source, in particular the arch specific
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file tls.h.
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For platforms where the dtv is located in the tcb, the magic offset
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to add to the thread pointer/register/... can be found by doing:
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cd none/tests
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gdb ./tls
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set debug-file-directory /usr/lib/debug # or equivalent
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start
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p &((struct pthread*)0x0)->header.dtv
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Currently the dtv offset is hardcoded, based on the assumption
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that this is relatively stable. If that would be false, then
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getoff-<platform> should be modified to output this offset e.g.
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depending on the glibc version. */
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CORE_ADDR** (*target_get_dtv)(ThreadState *tst);
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};
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extern void x86_init_architecture (struct valgrind_target_ops *target);
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extern void amd64_init_architecture (struct valgrind_target_ops *target);
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extern void arm_init_architecture (struct valgrind_target_ops *target);
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extern void arm64_init_architecture (struct valgrind_target_ops *target);
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extern void ppc32_init_architecture (struct valgrind_target_ops *target);
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extern void ppc64_init_architecture (struct valgrind_target_ops *target);
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extern void s390x_init_architecture (struct valgrind_target_ops *target);
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extern void mips32_init_architecture (struct valgrind_target_ops *target);
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extern void mips64_init_architecture (struct valgrind_target_ops *target);
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extern void tilegx_init_architecture (struct valgrind_target_ops *target);
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#endif
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