projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/arch/h8300/platform/h8s/ptrace_h8s.c | |
| 3 | * ptrace cpu depend helper functions | |
| 4 | * | |
| 5 | * Yoshinori Sato <ysato@users.sourceforge.jp> | |
| 6 | * | |
| 7 | * This file is subject to the terms and conditions of the GNU General | |
| 8 | * Public License. See the file COPYING in the main directory of | |
| 9 | * this archive for more details. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/linkage.h> | |
| 13 | #include <linux/sched.h> | |
| 14 | #include <linux/errno.h> | |
| 15 | #include <asm/ptrace.h> | |
| 16 | ||
| 17 | #define CCR_MASK 0x6f | |
| 18 | #define EXR_TRACE 0x80 | |
| 19 | ||
| 20 | /* Mapping from PT_xxx to the stack offset at which the register is | |
| 21 | saved. Notice that usp has no stack-slot and needs to be treated | |
| 22 | specially (see get_reg/put_reg below). */ | |
| 23 | static const int h8300_register_offset[] = { | |
| 24 | PT_REG(er1), PT_REG(er2), PT_REG(er3), PT_REG(er4), | |
| 25 | PT_REG(er5), PT_REG(er6), PT_REG(er0), PT_REG(orig_er0), | |
| 26 | PT_REG(ccr), PT_REG(pc), 0, PT_REG(exr) | |
| 27 | }; | |
| 28 | ||
| 29 | /* read register */ | |
| 30 | long h8300_get_reg(struct task_struct *task, int regno) | |
| 31 | { | |
| 32 | switch (regno) { | |
| 33 | case PT_USP: | |
| 34 | return task->thread.usp + sizeof(long)*2 + 2; | |
| 35 | case PT_CCR: | |
| 36 | case PT_EXR: | |
| 37 | return *(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]); | |
| 38 | default: | |
| 39 | return *(unsigned long *)(task->thread.esp0 + h8300_register_offset[regno]); | |
| 40 | } | |
| 41 | } | |
| 42 | ||
| 43 | /* write register */ | |
| 44 | int h8300_put_reg(struct task_struct *task, int regno, unsigned long data) | |
| 45 | { | |
| 46 | unsigned short oldccr; | |
| 47 | switch (regno) { | |
| 48 | case PT_USP: | |
| 49 | task->thread.usp = data - sizeof(long)*2 - 2; | |
| 50 | case PT_CCR: | |
| 51 | oldccr = *(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]); | |
| 52 | oldccr &= ~CCR_MASK; | |
| 53 | data &= CCR_MASK; | |
| 54 | data |= oldccr; | |
| 55 | *(unsigned short *)(task->thread.esp0 + h8300_register_offset[regno]) = data; | |
| 56 | break; | |
| 57 | case PT_EXR: | |
| 58 | /* exr modify not support */ | |
| 59 | return -EIO; | |
| 60 | default: | |
| 61 | *(unsigned long *)(task->thread.esp0 + h8300_register_offset[regno]) = data; | |
| 62 | break; | |
| 63 | } | |
| 64 | return 0; | |
| 65 | } | |
| 66 | ||
| 67 | /* disable singlestep */ | |
| 857fb252 | 68 | void user_disable_single_step(struct task_struct *child) |
| 1da177e4 LT |
69 | { |
| 70 | *(unsigned short *)(child->thread.esp0 + h8300_register_offset[PT_EXR]) &= ~EXR_TRACE; | |
| 71 | } | |
| 72 | ||
| 73 | /* enable singlestep */ | |
| 857fb252 | 74 | void user_enable_single_step(struct task_struct *child) |
| 1da177e4 LT |
75 | { |
| 76 | *(unsigned short *)(child->thread.esp0 + h8300_register_offset[PT_EXR]) |= EXR_TRACE; | |
| 77 | } | |
| 78 | ||
| 79 | asmlinkage void trace_trap(unsigned long bp) | |
| 80 | { | |
| 81 | (void)bp; | |
| 82 | force_sig(SIGTRAP,current); | |
| 83 | } | |
| 84 |