GETSECTBYNAME(3)GETSECTBYNAME(3)NAME
getsectbyname, getsectdata - get the section information for the named
section
SYNOPSIS
#include <ldsyms.h>
#include <sys/loader.h>
const struct section *getsectbynamefromheader(struct mach_header *mhp, char *segname, char *sectname)
const struct section *getsectbyname(char *segname, char *sectname);
void *getsectdatafromheader(struct mach_header *mhp, char *segname, char *sectname, int *size)
void *getsectdata(char *segname, char *sectname, int *size);
void *getsectdatafromlib(char *libname, char *segname, char *sectname, int *size)
DESCRIPTION
Getsectbynamefromheader returns the section structure for the named
section in the named segment if it exists in the Mach-O (Mach object)
executable for the specified Mach header getsectbynamefromheader(3) is
linked into. Otherwise it returns NULL. The Mach header can either be
the link editor defined symbol _mh_execute_header or the header address
of a Mach fixed virtual memory shared library. This routine just looks
through the load commands that follow the header to find the specified
section. Since the headers are mapped into the text segment they are
read only and thus const.
Getsectbyname is the same as getsectbynamefromheader with its first
argument being the link editor defined symbol _mh_execute_header.
Getsectdatafromheader returns a pointer to the data for the named
section in the named segment if it exists in the Mach-O executable for
the specified Mach header it is linked into. Also it returns the size
of the section data indirectly through the pointer size. Otherwise it
returns NULL for the pointer and zero for the size.
Getsectdata is the same as getsectdatafromheader with its first
argument being the link editor defined symbol _mh_execute_header.
Getsectdatafromlib is the same as getsectdatafromheader with its first
argument being the name of a shared library (for example: ``libNeXT_s''
for /usr/shlib/libNeXT_s.A.shlib) to get the section data from. If
that shared library isn't used in the executable then it returns NULL
for the pointer and zero for the size.
SEE ALSOend(3), getsegbyname(3), getmachheaders(3)NeXT Computer, Inc. March 1, 1989 GETSECTBYNAME(3)