swapcontext(2)
NAME
swapcontext - Swap out old context with new context
SYNOPSIS
int sys_swapcontext (struct ucontext *old_ctx,
struct ucontext *new_ctx, int r5, int r6, int r7,
int r8, struct pt_regs *regs);
DESCRIPTION
swapcontext swaps out context old_ctx with new context new_ctx. The int
r# values have no place in the system call functionality. The regs value indicates the current user register values from the user stack.
RETURN VALUE
swapcontext returns 0 on success; otherwise, swapcontext returns one of
the errors listed in the "Errors" section.
ERRORS
- -EFAULT
- swapcontext could not verify that the memory area pointed to by old_ctx or new_ctx was accessible for the operation.
- -SIGSEGV
- A fault occurred when the context was being copied into the kernel's image of the user's registers. The should only occur in an out-of-memory situation.
SEE ALSO
getcontext(2), sigaction(2), sigaltstack(2), sigprocmask(2)
AUTHOR
- Niki Rahimi