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setustack(2) [opensolaris man page]

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)

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stack_setbounds(3C)					   Standard C Library Functions 				       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 applications that are managing their own alternate stacks. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | 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) SunOS 5.11 18 Jul 2002 stack_setbounds(3C)
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