syscall_get_arguments

Langue: en

Version: May 2009 (fedora - 06/07/09)

Section: 9 (Appels noyau Linux)

NAME

syscall_get_arguments - extract system call parameter values

SYNOPSIS

void syscall_get_arguments(struct task_struct * task, struct pt_regs * regs, unsigned int i, unsigned int n, unsigned long * args);

ARGUMENTS

task

task of interest, must be blocked

regs


task_pt_regs of task

i

argument index [0,5]

n

number of arguments; n+i must be [1,6].

args

array filled with argument values

DESCRIPTION

Fetches n arguments to the system call starting with the i'th argument (from 0 through 5). Argument i is stored in args[0], and so on. An arch inline version is probably optimal when i and n are constants.

It's only valid to call this when task is stopped for tracing on entry to a system call, due to TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT. It's invalid to call this with i + n > 6; we only support system calls taking up to 6 arguments.