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SYSCALL_GET_RETURN_V(9) Machine State SYSCALL_GET_RETURN_V(9)

NAME

syscall_get_return_value - get the return value of a traced system call

SYNOPSIS

long syscall_get_return_value(struct task_struct * task, struct pt_regs * regs);

ARGUMENTS

task

task of interest, must be blocked

regs

task_pt_regs of task

DESCRIPTION

Returns the return value of the successful system call. This value is meaningless if syscall_get_error returned nonzero.

It´s only valid to call this when task is stopped for tracing on exit from a system call, due to TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT.

April 2023 Kernel Hackers Manual 2.6.