Al Viro | 37185b3 | 2012-10-08 03:27:32 +0100 | [diff] [blame] | 1 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #include "asm/ptrace.h" |
| 3 | |
| 4 | int putreg(struct task_struct *child, unsigned long regno, |
| 5 | unsigned long value) |
| 6 | { |
| 7 | child->thread.process_regs.regs[regno >> 2] = value; |
| 8 | return 0; |
| 9 | } |
| 10 | |
Bodo Stroesser | 82c1c11 | 2005-05-06 21:30:46 -0700 | [diff] [blame] | 11 | int poke_user(struct task_struct *child, long addr, long data) |
| 12 | { |
| 13 | if ((addr & 3) || addr < 0) |
| 14 | return -EIO; |
| 15 | |
| 16 | if (addr < MAX_REG_OFFSET) |
| 17 | return putreg(child, addr, data); |
| 18 | |
| 19 | else if((addr >= offsetof(struct user, u_debugreg[0])) && |
| 20 | (addr <= offsetof(struct user, u_debugreg[7]))){ |
| 21 | addr -= offsetof(struct user, u_debugreg[0]); |
| 22 | addr = addr >> 2; |
| 23 | if((addr == 4) || (addr == 5)) return -EIO; |
| 24 | child->thread.arch.debugregs[addr] = data; |
| 25 | return 0; |
| 26 | } |
| 27 | return -EIO; |
| 28 | } |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | unsigned long getreg(struct task_struct *child, unsigned long regno) |
| 31 | { |
| 32 | unsigned long retval = ~0UL; |
| 33 | |
| 34 | retval &= child->thread.process_regs.regs[regno >> 2]; |
| 35 | return retval; |
| 36 | } |
| 37 | |
Bodo Stroesser | 82c1c11 | 2005-05-06 21:30:46 -0700 | [diff] [blame] | 38 | int peek_user(struct task_struct *child, long addr, long data) |
| 39 | { |
| 40 | /* read the word at location addr in the USER area. */ |
| 41 | unsigned long tmp; |
| 42 | |
| 43 | if ((addr & 3) || addr < 0) |
| 44 | return -EIO; |
| 45 | |
| 46 | tmp = 0; /* Default return condition */ |
| 47 | if(addr < MAX_REG_OFFSET){ |
| 48 | tmp = getreg(child, addr); |
| 49 | } |
| 50 | else if((addr >= offsetof(struct user, u_debugreg[0])) && |
| 51 | (addr <= offsetof(struct user, u_debugreg[7]))){ |
| 52 | addr -= offsetof(struct user, u_debugreg[0]); |
| 53 | addr = addr >> 2; |
| 54 | tmp = child->thread.arch.debugregs[addr]; |
| 55 | } |
| 56 | return put_user(tmp, (unsigned long *) data); |
| 57 | } |
| 58 | |