stack_setbounds(3C)
NAME
stack_setbounds - update stack boundaries
SYNOPSIS
#include <ucontext.h>
int stack_setbounds(const stack_t *sp);
DESCRIPTION
The stack_setbounds() function updates the current base and
bounds of the stack for the current thread to the bounds
specified by the stack_t structure pointed to by sp. The
ss_sp member refers to the virtual address of the base of
the stack memory. The ss_size member refers to the size of
the stack in bytes. The ss_flags member must be set to 0.
RETURN VALUES
Upon successful completion, stack_setbounds() returns 0.
Otherwise, -1 is returned and errno is set to indicate the
error.
ERRORS
The stack_setbounds() function will fail if:
EFAULT
The sp argument does not refer to a valid address or
the ss_sp member of the stack_t structure pointed to
by sp points to an illegal address.
EINVAL
The ss_sp member of the stack_t structure pointed to
by sp is not properly aligned, the ss_size member is
too small or is not properly aligned, or the ss_flags
member is non-zero.
USAGE
The stack_setbounds() function is intended for use by appli-
cations that are managing their own alternate stacks.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Interface Stability | Evolving |
|_____________________________|_____________________________|
| MT-Level | Async-Signal-Safe |
|_____________________________|_____________________________|
SEE ALSO
getustack(2), _stack_grow(3C), stack_getbounds(3C),
stack_inbounds(3C), stack_violation(3C), attributes(5)
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