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score: update files according to review comments.

This commit is contained in:
Chen Liqin 2009-08-30 12:34:08 +08:00
parent cf52c46835
commit 798983b2d5
1 changed files with 97 additions and 115 deletions
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212
arch/score/kernel/ptrace.c
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@ -23,11 +23,100 @@
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/elf.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/ptrace.h>
#include <linux/regset.h>
#include <asm/uaccess.h>
/*
* retrieve the contents of SCORE userspace general registers
*/
static int genregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
const struct pt_regs *regs = task_pt_regs(target);
int ret;
/* skip 9 * sizeof(unsigned long) not use for pt_regs */
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
0, offsetof(struct pt_regs, regs));
/* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->regs,
offsetof(struct pt_regs, regs),
offsetof(struct pt_regs, cp0_condition));
if (!ret)
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
sizeof(struct pt_regs), -1);
return ret;
}
/*
* update the contents of the SCORE userspace general registers
*/
static int genregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_regs *regs = task_pt_regs(target);
int ret;
/* skip 9 * sizeof(unsigned long) */
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
0, offsetof(struct pt_regs, regs));
/* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs->regs,
offsetof(struct pt_regs, regs),
offsetof(struct pt_regs, cp0_condition));
if (!ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
sizeof(struct pt_regs), -1);
return ret;
}
/*
* Define the register sets available on the score7 under Linux
*/
enum score7_regset {
REGSET_GENERAL,
};
static const struct user_regset score7_regsets[] = {
[REGSET_GENERAL] = {
.core_note_type = NT_PRSTATUS,
.n = ELF_NGREG,
.size = sizeof(long),
.align = sizeof(long),
.get = genregs_get,
.set = genregs_set,
},
};
static const struct user_regset_view user_score_native_view = {
.name = "score7",
.e_machine = EM_SCORE7,
.regsets = score7_regsets,
.n = ARRAY_SIZE(score7_regsets),
};
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
return &user_score_native_view;
}
static int is_16bitinsn(unsigned long insn)
{
if ((insn & INSN32_MASK) == INSN32_MASK)
@ -80,34 +169,6 @@ write_tsk_long(struct task_struct *child,
return copied != sizeof(val) ? -EIO : 0;
}
/*
* Get all user integer registers.
*/
static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
{
struct pt_regs *regs = task_pt_regs(tsk);
return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
}
/*
* Set all user integer registers.
*/
static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
{
struct pt_regs newregs;
int ret;
ret = -EFAULT;
if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
struct pt_regs *regs = task_pt_regs(tsk);
*regs = newregs;
ret = 0;
}
return ret;
}
void user_enable_single_step(struct task_struct *child)
{
/* far_epc is the target of branch */
@ -270,97 +331,18 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
unsigned long __user *datap = (void __user *)data;
switch (request) {
/* Read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
struct pt_regs *regs;
unsigned long tmp;
regs = task_pt_regs(child);
tmp = 0; /* Default return value. */
switch (addr) {
case 0 ... 31:
tmp = regs->regs[addr];
break;
case PC:
tmp = regs->cp0_epc;
break;
case ECR:
tmp = regs->cp0_ecr;
break;
case EMA:
tmp = regs->cp0_ema;
break;
case CEH:
tmp = regs->ceh;
break;
case CEL:
tmp = regs->cel;
break;
case CONDITION:
tmp = regs->cp0_condition;
break;
case PSR:
tmp = regs->cp0_psr;
break;
case COUNTER:
tmp = regs->sr0;
break;
case LDCR:
tmp = regs->sr1;
break;
case STCR:
tmp = regs->sr2;
break;
default:
tmp = 0;
return -EIO;
}
ret = put_user(tmp, (unsigned int __user *) datap);
return ret;
}
case PTRACE_POKEUSR: {
struct pt_regs *regs;
ret = 0;
regs = task_pt_regs(child);
switch (addr) {
case 0 ... 31:
regs->regs[addr] = data;
break;
case PC:
regs->cp0_epc = data;
break;
case CEH:
regs->ceh = data;
break;
case CEL:
regs->cel = data;
break;
case CONDITION:
regs->cp0_condition = data;
break;
case PSR:
case COUNTER:
case STCR:
case LDCR:
break; /* user can't write the reg */
default:
/* The rest are not allowed. */
ret = -EIO;
break;
}
break;
}
case PTRACE_GETREGS:
ret = ptrace_getregs(child, (void __user *)datap);
ret = copy_regset_to_user(child, &user_score_native_view,
REGSET_GENERAL,
0, sizeof(struct pt_regs),
(void __user *)datap);
break;
case PTRACE_SETREGS:
ret = ptrace_setregs(child, (void __user *)datap);
ret = copy_regset_from_user(child, &user_score_native_view,
REGSET_GENERAL,
0, sizeof(struct pt_regs),
(const void __user *)datap);
break;
default: