SYSCALL_ROLLBACK(9) Machine State SYSCALL_ROLLBACK(9)
NAME
syscall_rollback - roll back registers after an aborted system call
SYNOPSIS
void syscall_rollback(struct task_struct * task, struct pt_regs * regs);
ARGUMENTS
task
task of interest, must be in system call exit tracing
regs
task_pt_regs of task
DESCRIPTION
It's only valid to call this when task is stopped for system call exit tracing (due to TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT), after
tracehook_report_syscall_entry returned nonzero to prevent the system call from taking place.
This rolls back the register state in regs so it's as if the system call instruction was a no-op. The registers containing the system call
number and arguments are as they were before the system call instruction. This may not be the same as what the register state looked like
at system call entry tracing.
Kernel Hackers Manual 2.6. July 2010 SYSCALL_ROLLBACK(9)
