_stack_grow(3C) Standard C Library Functions _stack_grow(3C)NAME_stack_grow - express an intention to extend the stack
SYNOPSIS
#include <ucontext.h>
void *_stack_grow(void *addr);
DESCRIPTION
The _stack_grow() function indicates to the system that the stack is
about to be extended to the address specified by addr. If extending the
stack to this address would violate the stack boundaries as retreived
by stack_getbounds(3C), a SIGSEGV is raised.
If the disposition of SIGSEGV is SIG_DFL, the process is terminated and
a core dump is generated. If the application has installed its own
SIGSEGV handler to run on the alternate signal stack, the signal infor‐
mation passed to the handler will be such that a call to stack_viola‐
tion(3C) with these parameters returns 1.
The addr argument is a biased stack pointer value. See the Solaris
64-bit Developer's Guide.
This function has no effect if the specified address, addr, is within
the bounds of the current stack.
RETURN VALUES
If the _stack_grow() function succeeds and does not detect a stack
violation, it returns addr.
ERRORS
No errors are defined.
USAGE
The _stack_grow() function does not actually adjust the stack pointer
register. The caller is responsible for manipulating the stack pointer
register once _stack_grow() returns.
The _stack_grow() function is typically invoked by code created by the
compilation environment prior to executing code that modifies the stack
pointer. It can also be used by hand-written assembly routines to allo‐
cate stack-based storage safely.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Evolving │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Async-Signal-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOstack_getbounds(3C), stack_inbounds(3C), stack_violation(3C),
attributes(5)
Solaris 64-bit Developer's Guide
SunOS 5.10 18 Jul 2002 _stack_grow(3C)
