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Add -r option to 6l/8l/5l.

Browse Source 
This permits more flexibility with cgo and swig in cases where
the program is run on a machine other than the one on which it
is built.  Rather than storing the absolute path to the shared
library in the DT_NEEDED entry, we can store just the name,
and let the dynamic linker find it using DT_RUNPATH or the
LD_LIBRARY_PATH environment variable.

R=rsc
CC=golang-dev
https://golang.org/cl/223068
This commit is contained in:
Ian Lance Taylor 2010-02-26 14:03:52 -08:00
parent ba50599e46
commit e6443f6255
12 changed files with 26 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/cmd/5l/asm.c
View File

@ -322,6 +322,8 @@ doelf(void)
elfwritedynentsym(s, DT_REL, lookup(".rel", 0));
elfwritedynentsymsize(s, DT_RELSZ, lookup(".rel", 0));
elfwritedynent(s, DT_RELENT, ELF32RELSIZE);
if(rpath)
elfwritedynent(s, DT_RUNPATH, addstring(dynstr, rpath));
elfwritedynent(s, DT_NULL, 0);
}
}

2
src/cmd/5l/doc.go
View File

@ -23,6 +23,8 @@ Options new in this version:
-L dir1,dir2,..
Search for libraries (package files) in the comma-separated list of directories.
The default is the single location $GOROOT/pkg/$GOOS_arm.
-r dir1:dir2:...
Set the dynamic linker search path when using ELF.
-V
Print the linker version.

1
src/cmd/5l/l.h
View File

@ -333,6 +333,7 @@ EXTERN Oprang thumboprange[ALAST];
EXTERN char* outfile;
EXTERN int32 pc;
EXTERN uchar repop[ALAST];
EXTERN char* rpath;
EXTERN uint32 stroffset;
EXTERN int32 symsize;
EXTERN Prog* textp;

5
src/cmd/5l/obj.c
View File

@ -81,7 +81,7 @@ linkername[] =
void
usage(void)
{
fprint(2, "usage: 5l [-E entry] [-H head] [-L dir] [-T text] [-D data] [-R rnd] [-o out] main.5\n");
fprint(2, "usage: 5l [-E entry] [-H head] [-L dir] [-T text] [-D data] [-R rnd] [-r path] [-o out] main.5\n");
errorexit();
}
@ -128,6 +128,9 @@ main(int argc, char *argv[])
case 'R':
INITRND = atolwhex(EARGF(usage()));
break;
case 'r':
rpath = EARGF(usage());
break;
case 'H':
HEADTYPE = atolwhex(EARGF(usage()));
/* do something about setting INITTEXT */

2
src/cmd/6l/asm.c
View File

@ -408,6 +408,8 @@ doelf(void)
elfwritedynentsym(s, DT_RELA, lookup(".rela", 0));
elfwritedynentsymsize(s, DT_RELASZ, lookup(".rela", 0));
elfwritedynent(s, DT_RELAENT, ELF64RELASIZE);
if(rpath)
elfwritedynent(s, DT_RUNPATH, addstring(dynstr, rpath));
elfwritedynent(s, DT_NULL, 0);
}
}

2
src/cmd/6l/doc.go
View File

@ -35,6 +35,8 @@ Options new in this version:
-L dir1,dir2,..
Search for libraries (package files) in the comma-separated list of directories.
The default is the single location $GOROOT/pkg/$GOOS_amd64.
-r dir1:dir2:...
Set the dynamic linker search path when using ELF.
-V
Print the linker version.

1
src/cmd/6l/l.h
View File

@ -330,6 +330,7 @@ EXTERN int nerrors;
EXTERN char* noname;
EXTERN char* outfile;
EXTERN vlong pc;
EXTERN char* rpath;
EXTERN int32 spsize;
EXTERN Sym* symlist;
EXTERN int32 symsize;

5
src/cmd/6l/obj.c
View File

@ -76,7 +76,7 @@ isobjfile(char *f)
void
usage(void)
{
fprint(2, "usage: 6l [-options] [-E entry] [-H head] [-L dir] [-T text] [-R rnd] [-o out] main.6\n");
fprint(2, "usage: 6l [-options] [-E entry] [-H head] [-L dir] [-T text] [-R rnd] [-r path] [-o out] main.6\n");
exits("usage");
}
@ -126,6 +126,9 @@ main(int argc, char *argv[])
case 'R':
INITRND = atolwhex(EARGF(usage()));
break;
case 'r':
rpath = EARGF(usage());
break;
case 'x': /* produce export table */
doexp = 1;
if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))

2
src/cmd/8l/asm.c
View File

@ -398,6 +398,8 @@ doelf(void)
elfwritedynentsym(s, DT_REL, lookup(".rel", 0));
elfwritedynentsymsize(s, DT_RELSZ, lookup(".rel", 0));
elfwritedynent(s, DT_RELENT, ELF32RELSIZE);
if(rpath)
elfwritedynent(s, DT_RUNPATH, addstring(dynstr, rpath));
elfwritedynent(s, DT_NULL, 0);
}
}

2
src/cmd/8l/doc.go
View File

@ -32,6 +32,8 @@ Options new in this version:
-L dir1,dir2,..
Search for libraries (package files) in the comma-separated list of directories.
The default is the single location $GOROOT/pkg/$GOOS_386.
-r dir1:dir2:...
Set the dynamic linker search path when using ELF.
-V
Print the linker version.

1
src/cmd/8l/l.h
View File

@ -295,6 +295,7 @@ EXTERN int maxop;
EXTERN int nerrors;
EXTERN char* noname;
EXTERN int32 pc;
EXTERN char* rpath;
EXTERN int32 spsize;
EXTERN Sym* symlist;
EXTERN int32 symsize;

4
src/cmd/8l/obj.c
View File

@ -81,7 +81,7 @@ isobjfile(char *f)
void
usage(void)
{
fprint(2, "usage: 8l [-options] [-E entry] [-H head] [-L dir] [-T text] [-R rnd] [-o out] main.8\n");
fprint(2, "usage: 8l [-options] [-E entry] [-H head] [-L dir] [-T text] [-R rnd] [-r path] [-o out] main.8\n");
exits("usage");
}
@ -131,6 +131,8 @@ main(int argc, char *argv[])
case 'R':
INITRND = atolwhex(EARGF(usage()));
break;
case 'r':
rpath = EARGF(usage());
break;
case 'x': /* produce export table */
doexp = 1;