78d9af4cd3
handle_riprel_insn() assumes that nobody else could modify ->fixups before. This is correct but fragile, change it to use "|=". Also make ->fixups u8, we are going to add the new members into the union. It is not clear why UPROBE_FIX_RIP_.X lived in the upper byte, redefine them so that they can fit into u8. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#ifndef _ASM_UPROBES_H
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#define _ASM_UPROBES_H
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/*
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* User-space Probes (UProbes) for x86
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*
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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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*
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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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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2008-2011
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* Authors:
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* Srikar Dronamraju
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* Jim Keniston
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*/
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#include <linux/notifier.h>
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typedef u8 uprobe_opcode_t;
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#define MAX_UINSN_BYTES 16
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#define UPROBE_XOL_SLOT_BYTES 128 /* to keep it cache aligned */
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#define UPROBE_SWBP_INSN 0xcc
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#define UPROBE_SWBP_INSN_SIZE 1
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struct uprobe_xol_ops;
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struct arch_uprobe {
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union {
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u8 insn[MAX_UINSN_BYTES];
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u8 ixol[MAX_UINSN_BYTES];
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};
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const struct uprobe_xol_ops *ops;
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union {
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struct {
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s32 offs;
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u8 ilen;
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u8 opc1;
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} branch;
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struct {
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#ifdef CONFIG_X86_64
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long riprel_target;
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#endif
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u8 fixups;
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} def;
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};
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};
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struct arch_uprobe_task {
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#ifdef CONFIG_X86_64
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unsigned long saved_scratch_register;
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#endif
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unsigned int saved_trap_nr;
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unsigned int saved_tf;
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};
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#endif /* _ASM_UPROBES_H */
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