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#ifndef _ASM_UPROBES_H
#define _ASM_UPROBES_H
/*
* Userspace Probes (UProbes)
* include/asm-s390/uprobes.h
*
* Adapted from include/asm-i386/uprobes.h by:
* David Wilder <dwilder.us.ibm.com> 2007
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2006
*/
#include <linux/types.h>
#include <linux/ptrace.h>
/* Normally defined in Kconfig */
#define CONFIG_URETPROBES 1
#define CONFIG_UPROBES_SSOL 1
typedef u16 uprobe_opcode_t;
#define BREAKPOINT_INSTRUCTION 0x0002
#define BP_INSN_SIZE 2
#define MAX_UINSN_BYTES 6
#define BREAKPOINT_SIGNAL SIGILL
#define SSTEP_SIGNAL SIGTRAP
#ifdef CONFIG_COMPAT
#define SLOT_IP(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? 0x04 : 0x08)
#else
#define SLOT_IP(tsk) 0x08
#endif
#define FIXUP_PSW_NORMAL 0x08
#define FIXUP_BRANCH_NOT_TAKEN 0x04
#define FIXUP_RETURN_REGISTER 0x02
#define FIXUP_NOT_REQUIRED 0x01
struct uprobe_probept_arch_info {};
struct uprobe_task_arch_info {};
/* Architecture specific switch for where the IP points after a bp hit */
#define ARCH_BP_INST_PTR(inst_ptr) (inst_ptr - BP_INSN_SIZE)
struct uprobe_probept;
struct uprobe_task;
static int arch_validate_probed_insn(struct uprobe_probept *ppt,
struct task_struct *tsk);
/*
* On s390, a trap leaves the instruction pointer pointing past the
* trap instruction.
*/
static inline unsigned long arch_get_probept(struct pt_regs *regs)
{
return (unsigned long) (regs->psw.addr - BP_INSN_SIZE);
}
static inline void arch_reset_ip_for_sstep(struct pt_regs *regs)
{
regs->psw.addr -= BP_INSN_SIZE;
}
#ifdef CONFIG_URETPROBES
static inline void arch_restore_uret_addr(unsigned long ret_addr,
struct pt_regs *regs)
{
regs->psw.addr = ret_addr;
}
static unsigned long arch_hijack_uret_addr(unsigned long trampoline_addr,
struct pt_regs *regs, struct uprobe_task *utask);
static inline unsigned long arch_get_cur_sp(struct pt_regs *regs)
{
return regs->gprs[15];
}
/* The stack pointer is the same upon return as it is upon function entry. */
static inline unsigned long arch_predict_sp_at_ret(struct pt_regs *regs,
struct task_struct *tsk)
{
return regs->gprs[15];
}
#endif /* CONFIG_URETPROBES */
#endif /* _ASM_UPROBES_H */
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