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#ifndef _ASM_UPROBES_H
#define _ASM_UPROBES_H
/*
* Userspace Probes (UProbes) for PowerPC
*
* 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 IBM Corporation, 2007
*/
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/signal.h>
#define BREAKPOINT_SIGNAL SIGTRAP
#define SSTEP_SIGNAL SIGTRAP
/* Normally defined in Kconfig */
#define CONFIG_UPROBES_SSOL
#define CONFIG_URETPROBES 1
typedef unsigned int uprobe_opcode_t;
#define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */
#define BP_INSN_SIZE 4
#define MAX_UINSN_BYTES 4
#define SLOT_IP(tsk) 32 /* instruction pointer slot from include/asm/elf.h */
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)
struct uprobe_probept;
struct uprobe_task;
struct task_struct;
/* On powerpc, nip points to the trap. */
static inline unsigned long arch_get_probept(struct pt_regs *regs)
{
return (unsigned long)(regs->nip);
}
static inline void arch_reset_ip_for_sstep(struct pt_regs *regs)
{
}
static inline int arch_validate_probed_insn(struct uprobe_probept *ppt,
struct task_struct *tsk);
static unsigned long arch_hijack_uret_addr(unsigned long trampoline_addr,
struct pt_regs *regs, struct uprobe_task *utask);
static inline void arch_restore_uret_addr(unsigned long ret_addr,
struct pt_regs *regs)
{
regs->nip = ret_addr;
}
static unsigned long arch_get_cur_sp(struct pt_regs *regs)
{
return (unsigned long)(regs->gpr[1]);
}
static unsigned long arch_predict_sp_at_ret(struct pt_regs *regs,
struct task_struct *tsk)
{
return (unsigned long)(regs->gpr[1]);
}
#endif /* _ASM_UPROBES_H */
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