On Wednesday 21 January 2015 13:31:47 Yoshinori Sato wrote:
> +long arch_ptrace(struct task_struct *child, long request,
> + unsigned long addr, unsigned long data)
> +{
> + int ret;
> + int regno = addr >> 2;
> + unsigned long __user *datap = (unsigned long __user *) data;
> +
> + switch (request) {
> + /* read the word at location addr in the USER area. */
> + case PTRACE_PEEKUSR: {
...
> + case PTRACE_POKEUSR: /* write the word at location addr
...
> + case PTRACE_GETREGS: { /* Get all gp regs from the child. */
...
> + case PTRACE_SETREGS: { /* Set all gp regs in the child. */
For modern architecture implementations, we now use 'regset' to
abstract these, and simplify the arch_ptrace interface to
a single ptrace_request call. See openrisc or arm64 as examples.
Arnd
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