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OpenSolaris 2009.06 - man page for setustack (opensolaris section 2)

getustack(2)							   System Calls 						      getustack(2)

NAME
getustack, setustack - retrieve or change the address of per-LWP stack boundary information
SYNOPSIS
#include <ucontext.h> int getustack(stack_t **spp); int setustack(stack_t *sp);
DESCRIPTION
The getustack() function retrieves the address of per-LWP stack boundary information. The address is stored at the location pointed to by spp. If this address has not been defined using a previous call to setustack(), NULL is stored at the location pointed to by spp. The setustack() function changes the address of the current thread's stack boundary information to the value of sp.
RETURN VALUES
Upon successful completion, these functions return 0. Otherwise, -1 is returned and errno is set to indicate the error.
ERRORS
These functions will fail if: EFAULT The spp or sp argument does not refer to a valid address.
USAGE
Only implementors of custom threading libraries should use these functions to get and set the address of the stack bound to an internal per-thread data structure. Other users should use stack_getbounds(3C) and stack_setbounds(3C).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------------------------------------------+-------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------------------------------------------+-------------------+ |Interface Stability | Evolving | +--------------------------------------------------------+-------------------+ |MT-Level | Async-Signal-Safe | +--------------------------------------------------------+-------------------+
SEE ALSO
_stack_grow(3C), stack_getbounds(3C), stack_inbounds(3C), stack_setbounds(3C), stack_violation(3C), attributes(5) SunOS 5.11 2 Nov 2004 getustack(2)