| /* |
| * This file is part of ltrace. |
| * Copyright (C) 2013 Petr Machata, Red Hat Inc. |
| * Copyright (C) 2004,2008,2009 Juan Cespedes |
| * Copyright (C) 2006 Ian Wienand |
| * |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA |
| * 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| |
| #include <sys/types.h> |
| #include "ptrace.h" |
| #include "proc.h" |
| #include "common.h" |
| |
| void * |
| get_instruction_pointer(struct process *proc) |
| { |
| proc_archdep *a = (proc_archdep *) (proc->arch_ptr); |
| if (a->valid) |
| return (void *)a->regs.pc; |
| return (void *)-1; |
| } |
| |
| void |
| set_instruction_pointer(struct process *proc, void *addr) |
| { |
| proc_archdep *a = (proc_archdep *) (proc->arch_ptr); |
| if (a->valid) |
| a->regs.pc = (long)addr; |
| } |
| |
| void * |
| get_stack_pointer(struct process *proc) |
| { |
| proc_archdep *a = (proc_archdep *) (proc->arch_ptr); |
| if (a->valid) |
| return (void *)a->regs.u_regs[UREG_I5]; |
| return (void *)-1; |
| } |
| |
| void * |
| get_return_addr(struct process *proc, void *stack_pointer) |
| { |
| proc_archdep *a = (proc_archdep *) (proc->arch_ptr); |
| unsigned int t; |
| if (!a->valid) |
| return (void *)-1; |
| /* Work around structure returns */ |
| t = ptrace(PTRACE_PEEKTEXT, proc->pid, a->regs.u_regs[UREG_I6] + 8, 0); |
| if (t < 0x400000) |
| return (void *)a->regs.u_regs[UREG_I6] + 12; |
| return (void *)a->regs.u_regs[UREG_I6] + 8; |
| } |