| /* |
| * This file is part of ltrace. |
| * |
| * Copyright (C) 2013 Imagination Technologies Ltd. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * version 2 as published by the Free Software Foundation. |
| * |
| * 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 <sys/ptrace.h> |
| #include <linux/uio.h> |
| #include <asm/ptrace.h> |
| |
| #include "proc.h" |
| #include "common.h" |
| |
| arch_addr_t |
| get_instruction_pointer(struct process *proc) |
| { |
| struct user_gp_regs regs; |
| struct iovec iov; |
| |
| iov.iov_base = ®s; |
| iov.iov_len = sizeof(regs); |
| if (ptrace(PTRACE_GETREGSET, proc->pid, NT_PRSTATUS, (long)&iov)) |
| return (void *)-1; |
| |
| return (void *)regs.pc; /* PC */ |
| } |
| |
| void |
| set_instruction_pointer(struct process *proc, arch_addr_t addr) |
| { |
| struct user_gp_regs regs; |
| struct iovec iov; |
| |
| iov.iov_base = ®s; |
| iov.iov_len = sizeof(regs); |
| if (ptrace(PTRACE_GETREGSET, proc->pid, NT_PRSTATUS, (long)&iov)) |
| return; |
| |
| regs.pc = (unsigned long)addr; |
| |
| iov.iov_base = ®s; |
| iov.iov_len = sizeof(regs); |
| ptrace(PTRACE_SETREGSET, proc->pid, NT_PRSTATUS, (long)&iov); |
| } |
| |
| arch_addr_t |
| get_stack_pointer(struct process *proc) |
| { |
| struct user_gp_regs regs; |
| struct iovec iov; |
| |
| iov.iov_base = ®s; |
| iov.iov_len = sizeof(regs); |
| if (ptrace(PTRACE_GETREGSET, proc->pid, NT_PRSTATUS, (long)&iov)) |
| return (void *)-1; |
| |
| return (void *)regs.ax[0][0]; /* A0StP (A0.0) */ |
| } |
| |
| arch_addr_t |
| get_return_addr(struct process *proc, void *stack_pointer) |
| { |
| struct user_gp_regs regs; |
| struct iovec iov; |
| |
| iov.iov_base = ®s; |
| iov.iov_len = sizeof(regs); |
| if (ptrace(PTRACE_GETREGSET, proc->pid, NT_PRSTATUS, (long)&iov)) |
| return (void *)-1; |
| |
| return (void *)regs.dx[4][1]; /* D1RtP (D1.4) */ |
| } |