Re: [PATCH v4 2/2] ptrace: add PTRACE_GET_SYSCALL_INFO request
From: Oleg Nesterov <oleg@redhat.com>
Date: 2018-11-28 14:29:36
Also in:
lkml
On 11/28, Oleg Nesterov wrote:
On 11/28, Dmitry V. Levin wrote:quoted
+static unsigned long +ptrace_get_syscall_info_entry(struct task_struct *child, + struct ptrace_syscall_info *info) +{ + struct pt_regs *regs = task_pt_regs(child); + unsigned long args[ARRAY_SIZE(info->entry.args)]; + int i; + + info->op = PTRACE_SYSCALL_INFO_ENTRY; + info->arch = syscall_get_arch(child); + info->entry.nr = syscall_get_nr(child, regs); + info->entry.instruction_pointer = instruction_pointer(regs); + info->entry.stack_pointer = user_stack_pointer(regs); + info->entry.frame_pointer = frame_pointer(regs); + syscall_get_arguments(child, regs, 0, ARRAY_SIZE(args), args); + for (i = 0; i < ARRAY_SIZE(args); i++) + info->entry.args[i] = args[i];I must have missed something,
Yes ;) I didn't look at info->entry.args, it is __u64[6].
but why do we need the temporary args[], syscall_get_arguments(..., info->entry.args) should equally work? Oleg.