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/*******************************************************************/
/* slibtool: a strong libtool implementation, written in C */
/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
#include "slibtool_linkcmd_impl.h"
#include "slibtool_mapfile_impl.h"
#include "slibtool_metafile_impl.h"
#include "slibtool_realpath_impl.h"
#include "slibtool_snprintf_impl.h"
#include "slibtool_symlink_impl.h"
#include "slibtool_spawn_impl.h"
#include "slibtool_visibility_impl.h"
static int slbt_linkcmd_exit(
struct slbt_deps_meta * depsmeta,
int ret)
{
if (depsmeta->altv)
free(depsmeta->altv);
if (depsmeta->args)
free(depsmeta->args);
return ret;
}
static int slbt_exec_link_remove_file(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * target)
{
int fdcwd;
(void)ectx;
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* remove target (if any) */
if (!unlinkat(fdcwd,target,0) || (errno == ENOENT))
return 0;
return SLBT_SYSTEM_ERROR(dctx,0);
}
static int slbt_exec_link_remove_dso_files(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * target)
{
int fdcwd;
char * mark;
char * sbuf;
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* remove target (if any) */
if (unlinkat(fdcwd,target,0) && (errno != ENOENT))
return SLBT_SYSTEM_ERROR(dctx,0);
/* remove a previous .disabled placeholder */
sbuf = (slbt_get_exec_ictx(ectx))->sbuf;
mark = sbuf;
mark += sprintf(mark,"%s",target);
strcpy(mark,".disabled");
if (unlinkat(fdcwd,sbuf,0) && (errno != ENOENT))
return SLBT_SYSTEM_ERROR(dctx,0);
return 0;
}
slbt_hidden int slbt_exec_link_create_library(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * dsobasename,
const char * dsofilename,
const char * relfilename,
bool fardlopen,
bool fpic)
{
int fdcwd;
char ** parg;
char ** xarg;
char * ccwrap;
const char * laout;
const char * dot;
char cwd [PATH_MAX];
char output [PATH_MAX];
char soname [PATH_MAX];
char symfile[PATH_MAX];
char mapfile[PATH_MAX];
struct slbt_deps_meta depsmeta = {0,0,0,0};
/* initial state */
slbt_ectx_reset_arguments(ectx);
/* placeholders */
slbt_reset_placeholders(ectx);
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* remove previous libfoo.so, libfoo.so.disabled */
if (slbt_exec_link_remove_dso_files(dctx,ectx,ectx->dsofilename) < 0)
return SLBT_NESTED_ERROR(dctx);
/* input argument adjustment */
for (parg=ectx->cargv; *parg; parg++)
slbt_adjust_object_argument(*parg,fpic,false,fdcwd);
/* .deps */
if (slbt_exec_link_create_dep_file(
dctx,ectx,ectx->cargv,
dsofilename,false))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_NESTED_ERROR(dctx));
/* linker argument adjustment */
for (parg=ectx->cargv, xarg=ectx->xargv; *parg; parg++, xarg++)
if (slbt_adjust_linker_argument(
dctx,
*parg,xarg,true,
dctx->cctx->settings.dsosuffix,
dctx->cctx->settings.arsuffix,
&depsmeta) < 0)
return SLBT_NESTED_ERROR(dctx);
/* --no-undefined */
if (dctx->cctx->drvflags & SLBT_DRIVER_NO_UNDEFINED)
*ectx->noundef = slbt_host_group_is_darwin(dctx)
? "-Wl,-undefined,error"
: "-Wl,--no-undefined";
/* -soname */
dot = strrchr(dctx->cctx->output,'.');
laout = (dot && !strcmp(dot,".la"))
? dctx->cctx->output
: 0;
char wl_soname[24];
if (slbt_host_group_is_darwin(dctx)) {
strcpy(wl_soname,"-Wl,-install_name");
} else {
strcpy(wl_soname,"-Wl,-soname");
}
if ((dctx->cctx->drvflags & SLBT_DRIVER_IMAGE_MACHO)) {
(void)0;
} else if (!laout && (dctx->cctx->drvflags & SLBT_DRIVER_MODULE)) {
if (slbt_snprintf(soname,sizeof(soname),
"-Wl,%s",dctx->cctx->output) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->soname = wl_soname;
*ectx->lsoname = soname;
} else if (relfilename && dctx->cctx->verinfo.verinfo) {
if (slbt_snprintf(soname,sizeof(soname),
"-Wl,%s%s%s%s%s.%d%s",
ectx->sonameprefix,
dctx->cctx->libname,
dctx->cctx->release ? "-" : "",
dctx->cctx->release ? dctx->cctx->release : "",
dctx->cctx->settings.osdsuffix,
dctx->cctx->verinfo.major,
dctx->cctx->settings.osdfussix) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->soname = wl_soname;
*ectx->lsoname = soname;
} else if (relfilename) {
if (slbt_snprintf(soname,sizeof(soname),
"-Wl,%s%s%s%s%s",
ectx->sonameprefix,
dctx->cctx->libname,
dctx->cctx->release ? "-" : "",
dctx->cctx->release ? dctx->cctx->release : "",
dctx->cctx->settings.dsosuffix) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->soname = wl_soname;
*ectx->lsoname = soname;
} else if (dctx->cctx->drvflags & SLBT_DRIVER_AVOID_VERSION) {
if (slbt_snprintf(soname,sizeof(soname),
"-Wl,%s%s%s",
ectx->sonameprefix,
dctx->cctx->libname,
dctx->cctx->settings.dsosuffix) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->soname = wl_soname;
*ectx->lsoname = soname;
} else {
if (slbt_snprintf(soname,sizeof(soname),
"-Wl,%s%s%s.%d%s",
ectx->sonameprefix,
dctx->cctx->libname,
dctx->cctx->settings.osdsuffix,
dctx->cctx->verinfo.major,
dctx->cctx->settings.osdfussix) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->soname = wl_soname;
*ectx->lsoname = soname;
}
/* PE: --output-def */
if (dctx->cctx->drvflags & SLBT_DRIVER_IMAGE_PE) {
if (slbt_snprintf(symfile,sizeof(symfile),
"-Wl,%s",
ectx->deffilename) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->symdefs = "-Wl,--output-def";
*ectx->symfile = symfile;
}
/* -export-symbols */
if (dctx->cctx->expsyms) {
struct slbt_symlist_ctx * sctx;
sctx = (slbt_get_exec_ictx(ectx))->sctx;
if (slbt_util_create_mapfile(sctx,ectx->mapfilename,0644) < 0)
return SLBT_NESTED_ERROR(dctx);
if (slbt_snprintf(mapfile,sizeof(mapfile),
"-Wl,%s",
ectx->mapfilename) < 0)
return SLBT_BUFFER_ERROR(dctx);
if (slbt_host_group_is_darwin(dctx)) {
*ectx->explarg = "-Wl,-exported_symbols_list";
*ectx->expsyms = mapfile;
} else if (slbt_host_group_is_winnt(dctx)) {
*ectx->expsyms = mapfile;
} else {
*ectx->explarg = "-Wl,--version-script";
*ectx->expsyms = mapfile;
}
}
/* -export-symbols-regex; and see also: */
/* slbt_exec_link_create_expsyms_archive() */
if (dctx->cctx->regex) {
if (slbt_snprintf(mapfile,sizeof(mapfile),
"-Wl,%s",
ectx->mapfilename) < 0)
return SLBT_BUFFER_ERROR(dctx);
if (slbt_host_group_is_darwin(dctx)) {
*ectx->explarg = "-Wl,-exported_symbols_list";
*ectx->expsyms = mapfile;
} else if (slbt_host_group_is_winnt(dctx)) {
*ectx->expsyms = mapfile;
} else {
*ectx->explarg = "-Wl,--version-script";
*ectx->expsyms = mapfile;
}
}
/* shared/static */
if (dctx->cctx->drvflags & SLBT_DRIVER_ALL_STATIC) {
*ectx->dpic = "-static";
} else if (dctx->cctx->settings.picswitch) {
*ectx->dpic = "-shared";
*ectx->fpic = dctx->cctx->settings.picswitch;
} else {
*ectx->dpic = "-shared";
}
/* output */
if (!laout && dctx->cctx->drvflags & SLBT_DRIVER_MODULE) {
strcpy(output,dctx->cctx->output);
} else if (relfilename) {
strcpy(output,relfilename);
} else if (dctx->cctx->drvflags & SLBT_DRIVER_AVOID_VERSION) {
strcpy(output,dsofilename);
} else {
if (slbt_snprintf(output,sizeof(output),
"%s%s.%d.%d.%d%s",
dsobasename,
dctx->cctx->settings.osdsuffix,
dctx->cctx->verinfo.major,
dctx->cctx->verinfo.minor,
dctx->cctx->verinfo.revision,
dctx->cctx->settings.osdfussix) < 0)
return SLBT_BUFFER_ERROR(dctx);
}
/* output marks */
*ectx->lout[0] = "-o";
*ectx->lout[1] = output;
/* ldrpath */
if (dctx->cctx->host.ldrpath) {
if (slbt_exec_link_remove_file(dctx,ectx,ectx->rpathfilename))
return SLBT_NESTED_ERROR(dctx);
if (slbt_create_symlink(
dctx,ectx,
dctx->cctx->host.ldrpath,
ectx->rpathfilename,
SLBT_SYMLINK_LITERAL))
return SLBT_NESTED_ERROR(dctx);
}
/* cwd */
if (slbt_realpath(fdcwd,".",O_DIRECTORY,cwd,sizeof(cwd)))
return SLBT_SYSTEM_ERROR(dctx,0);
/* .libs/libfoo.so --> -L.libs -lfoo */
if (slbt_exec_link_adjust_argument_vector(
dctx,ectx,&depsmeta,cwd,true))
return SLBT_NESTED_ERROR(dctx);
/* using alternate argument vector */
ccwrap = (char *)dctx->cctx->ccwrap;
ectx->argv = depsmeta.altv;
ectx->program = ccwrap ? ccwrap : depsmeta.altv[0];
/* sigh */
if (slbt_exec_link_finalize_argument_vector(dctx,ectx))
return SLBT_NESTED_ERROR(dctx);
/* all done? */
if (fardlopen)
return 0;
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(ectx))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_NESTED_ERROR(dctx));
/* spawn */
if ((slbt_spawn(ectx,true) < 0) && (ectx->pid < 0)) {
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SPAWN_ERROR(dctx));
} else if (ectx->exitcode) {
return slbt_linkcmd_exit(
&depsmeta,
SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_LINK_ERROR));
}
return slbt_linkcmd_exit(&depsmeta,0);
}
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