| #include "linux/sched.h" |
| #include "asm/ptrace.h" |
| |
| int putreg(struct task_struct *child, unsigned long regno, |
| unsigned long value) |
| { |
| child->thread.process_regs.regs[regno >> 2] = value; |
| return 0; |
| } |
| |
| int poke_user(struct task_struct *child, long addr, long data) |
| { |
| if ((addr & 3) || addr < 0) |
| return -EIO; |
| |
| if (addr < MAX_REG_OFFSET) |
| return putreg(child, addr, data); |
| |
| else if((addr >= offsetof(struct user, u_debugreg[0])) && |
| (addr <= offsetof(struct user, u_debugreg[7]))){ |
| addr -= offsetof(struct user, u_debugreg[0]); |
| addr = addr >> 2; |
| if((addr == 4) || (addr == 5)) return -EIO; |
| child->thread.arch.debugregs[addr] = data; |
| return 0; |
| } |
| return -EIO; |
| } |
| |
| unsigned long getreg(struct task_struct *child, unsigned long regno) |
| { |
| unsigned long retval = ~0UL; |
| |
| retval &= child->thread.process_regs.regs[regno >> 2]; |
| return retval; |
| } |
| |
| int peek_user(struct task_struct *child, long addr, long data) |
| { |
| /* read the word at location addr in the USER area. */ |
| unsigned long tmp; |
| |
| if ((addr & 3) || addr < 0) |
| return -EIO; |
| |
| tmp = 0; /* Default return condition */ |
| if(addr < MAX_REG_OFFSET){ |
| tmp = getreg(child, addr); |
| } |
| else if((addr >= offsetof(struct user, u_debugreg[0])) && |
| (addr <= offsetof(struct user, u_debugreg[7]))){ |
| addr -= offsetof(struct user, u_debugreg[0]); |
| addr = addr >> 2; |
| tmp = child->thread.arch.debugregs[addr]; |
| } |
| return put_user(tmp, (unsigned long *) data); |
| } |
| |
