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