svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
elfwrap(1)
elfwrap(1) User Commands elfwrap(1)
NAME
elfwrap - wrap data in an ELF file
SYNOPSIS
elfwrap [-64] [-e end-symbol] [-n section-name] [-o relobj-file]
[-s start-symbol] [-V] [-z target=sparc | x86] data-file ...
DESCRIPTION
The elfwrap utility creates an ELF relocatable object file from one or
more data files. The relocatable object encapsulates each data file
within an individual section, together with symbols that can be used to
reference the section. The relocatable object is appropriate for inclu‐
sion with a subsequent link-edit. Users can reference the encapsulated
data using the associated symbols.
By default, a 32-bit ELF relocatable object is created that is appro‐
priate for the machine on which elfwrap is executed. The -64 option can
be used to create a 64-bit ELF relocatable object. The -z target option
can be used to create a relocatable object for a specific machine type.
By default, the relocatable object a.wrap.o is created. The -o option
can be used to specify an alternative relocatable object name.
By default, the base name of each data file, as define by the base‐
name(1) utility, is used to create section and symbol names that are
assigned to the associated data. The -e, -n, and -s options can be used
to override these defaults. Without these options, an input data file
ISV/isv-data, has the following ELF information associated to the data
within the output relocatable object.
An ELF section named .isv-data
This section contains the entire contents of the input data file.
The section is also identified with the SHF_SUNW_ELFWRAP section
flag.
An ELF symbol named isv-data_start
This symbol reflects the starting address of the .isv-data section.
An ELF symbol named isv-data_end
This symbol reflects the address of the first location after the
.isv-data section.
OPTIONS
The following options are supported:
-64
Create a 64-bit ELF relocatable object.
-e end-symbol
Specifies the symbol name to be associated with the end of the in‐
put data file that follows this option on the command line.
-n section-name
Specifies the section name to be used for the input data file that
follows this option on the command line.
-o relobj-file
Produce a relocatable object that is named relobj-file.
-s start-symbol
Specifies the symbol name to be associated with the start of the
input data file that follows this option on the command line.
-z target=sparc | x86
Specifies the machine type for the output relocatable object. Sup‐
ported targets are sparc and x86. The 32-bit machine type for the
specified target is used unless the -64 option is also present, in
which case the corresponding 64-bit machine type is used. By de‐
fault, the relocatable object that is generated is 32-bit for the
machine one which elfwrap is executed.
-V
--version
Print version information and immediately exit.
-?
--help
Print usage message and immediately exit.
The -e, -n, and -s options are associated to the input data files that
follow these options on the command line. These options can be re‐
peated, prior to any input data file, to associate unique names to each
data file. Applying the same -e, or -s options to more than one input
data file results in multiply defined symbols being defined within the
relocatable object being created. This may render the object unsuitable
for additional link-editing. Multiple use of these options in this man‐
ner results in warning messages from elfwrap.
EXAMPLES
The following example encapsulates the system passwd file and the sys‐
tem group file within a relocatable object passgroup.o.
example% elfwrap -o passgroup.o /etc/passwd /etc/group
example% elfdump -c -T PROGBITS passgroup.o
Section Header[1]: sh_name: .passwd
sh_addr: 0 sh_flags: [ SHF_ALLOC SHF_SUNW_ELFWRAP ]
sh_size: 0x5a2 sh_type: [ SHT_PROGBITS ]
...
Section Header[2]: sh_name: .group
sh_addr: 0 sh_flags: [ SHF_ALLOC SHF_SUNW_ELFWRAP ]
sh_size: 0x199 sh_type: [ SHT_PROGBITS ]
...
example% elfdump -s passgroup.o | egrep "passwd|group"
[2] 0 0 SECT LOCL D 0 .passwd
[3] 0 0 SECT LOCL D 0 .group
[7] 0 0x5a2 OBJT GLOB D 0 .passwd passwd_start
[8] 0x5a2 0 OBJT GLOB D 0 .passwd passwd_end
[9] 0 0x199 OBJT GLOB D 0 .group group_start
[10] 0x199 0 OBJT GLOB D 0 .group group_end
example% strings -N.passwd passgroup.o | head -1
root:x:0:0:Super-User:/:/usr/sbin/sh
example% strings -N.group passgroup.o | head -1
root::0:
The password data within the relocatable object can be referenced from
the following user code.
example% cat main.c
#include <stdio.h>
extern char passwd_start, passwd_end;
void main()
{
char *pstart = &passwd_start, *pend = &passwd_end;
char *str, *lstr;
for (lstr = str = pstart; str < pend; str++) {
if ((*str == '\n') && (str != (pend - 1))) {
(void) printf("%.*s", (++str - lstr), lstr);
lstr = str;
}
}
}
example% cc -o main main.c passgroup.o
example% ./main
root:x:0:0:Super-User:/:/usr/sbin/sh
....
nobody4:x:65534:65534:SunOS 4.x NFS Anonymous Access User:/:
The following example uses the same input files, but assigns their data
to a common section name, and associates unique symbol names to each
data.
example% elfwrap -o passgroup.o -n .rodata \
-s P_START -e P_END /etc/passwd \
-s G_START -e G_END /etc/group
example% elfdump -c -T PROGBITS passgroup.o
Section Header[1]: sh_name: .rodata
sh_addr: 0 sh_flags: [ SHF_ALLOC SHF_SUNW_ELFWRAP ]
sh_size: 0x5a2 sh_type: [ SHT_PROGBITS ]
...
Section Header[2]: sh_name: .rodata
sh_addr: 0 sh_flags: [ SHF_ALLOC SHF_SUNW_ELFWRAP ]
sh_size: 0x199 sh_type: [ SHT_PROGBITS ]
...
example% elfdump -s passgroup.o | fgrep .rodata
[2] 0 0 SECT LOCL D 0 .rodata
[3] 0 0 SECT LOCL D 0 .rodata
[7] 0 0x5a2 OBJT GLOB D 0 .rodata P_START
[8] 0x5a2 0 OBJT GLOB D 0 .rodata P_END
[9] 0 0x199 OBJT GLOB D 0 .rodata G_START
[10] 0x199 0 OBJT GLOB D 0 .rodata G_END
FILES
a.wrap.o The default relocatable object file created.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitydeveloper/base-developer-utilities _ Inter‐
face StabilityCommitted
SEE ALSO
elfdump(1), ld(1), strings(1), elf(3ELF), attributes(7), ddi_mod‐
open(9F)
Oracle Solaris 11.4 Linkers and Libraries Guide
NOTES
Any data encapsulated with elfwrap must be in a format appropriate for
the destination target.
The name of the input file drives the creation of the symbol names to
associate with the input file data. Therefore, input files should be
uniquely named to avoid the creation of symbols with the same name.
Oracle Solaris 11.4 30 August 2017 elfwrap(1)