higepi/Projet_SETI_RISC-V
2
2
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
Projet_SETI_RISC-V/riscv-gnu-toolchain/gdb/ld/emultempl/aix.em

1619 lines
42 KiB
Text
Raw Normal View History

projet
2023-03-06 14:48:14 +01:00
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
if [ -z "$MACHINE" ]; then
OUTPUT_ARCH=${ARCH}
else
OUTPUT_ARCH=${ARCH}:${MACHINE}
fi
fragment <<EOF
/* This file is is generated by a shell script. DO NOT EDIT! */
/* AIX emulation code for ${EMULATION_NAME}
Copyright (C) 1991-2022 Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
AIX support by Ian Lance Taylor <ian@cygnus.com>
AIX 64 bit support by Tom Rix <trix@redhat.com>
This file is part of the GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define TARGET_IS_${EMULATION_NAME}
#include "sysdep.h"
#include "bfd.h"
#include "libiberty.h"
#include "safe-ctype.h"
#include "getopt.h"
#include "obstack.h"
#include "bfdlink.h"
#include "ctf-api.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
#include "ldctor.h"
#include <ldgram.h>
#include "coff/internal.h"
#include "coff/xcoff.h"
#include "libcoff.h"
#include "libxcoff.h"
#include "xcofflink.h"
static void gld${EMULATION_NAME}_read_file (const char *, bool);
static void gld${EMULATION_NAME}_free (void *);
static void gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *);
static void gld${EMULATION_NAME}_find_exp_assignment (etree_type *);
/* The file alignment required for each section. */
static unsigned long file_align;
/* The maximum size the stack is permitted to grow. This is stored in
the a.out header. */
static unsigned long maxstack;
/* The maximum data size. This is stored in the a.out header. */
static unsigned long maxdata;
/* Whether to perform garbage collection. */
static int gc = 1;
/* The module type to use. */
static unsigned short modtype = ('1' << 8) | 'L';
/* Whether the .text section must be read-only (i.e., no relocs
permitted). */
static int textro;
/* A mask of XCOFF_EXPALL and XCOFF_EXPFULL flags, as set by their
associated -b and -bno options. */
static unsigned int auto_export_flags;
/* A mask of auto_export_flags bits that were explicitly set on the
command line. */
static unsigned int explicit_auto_export_flags;
/* Whether to implement Unix like linker semantics. */
static int unix_ld;
/* Structure used to hold import file list. */
struct filelist
{
struct filelist *next;
const char *name;
};
/* List of import files. */
static struct filelist *import_files;
/* List of export symbols read from the export files. */
struct export_symbol_list
{
struct export_symbol_list *next;
const char *name;
};
static struct export_symbol_list *export_symbols;
/* Maintains the 32 or 64 bit mode state of import file */
static unsigned int symbol_mode = 0x04;
/* Which symbol modes are valid */
static unsigned int symbol_mode_mask = 0x0d;
/* Whether this is a 64 bit link */
static int is_64bit = 0;
/* Which syscalls from import file are valid */
static unsigned int syscall_mask = 0x77;
/* fake file for -binitfini support */
static lang_input_statement_type *initfini_file;
/* Whether to do run time linking
-brtl enables, -bnortl and -bnortllib disable. */
static int rtld;
/* Explicit command line library path, -blibpath */
static char *command_line_blibpath = NULL;
/* This routine is called before anything else is done. */
static void
gld${EMULATION_NAME}_before_parse (void)
{
ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
input_flags.dynamic = true;
config.has_shared = true;
/* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
Override them here so we can use the link_info.init_function as a
state flag that lets the backend know that -binitfini has been done. */
link_info.init_function = NULL;
link_info.fini_function = NULL;
}
/* Handle AIX specific options. */
enum
{
OPTION_IGNORE = 300,
OPTION_AUTOIMP,
OPTION_ERNOTOK,
OPTION_EROK,
OPTION_EXPALL,
OPTION_EXPFULL,
OPTION_EXPORT,
OPTION_IMPORT,
OPTION_INITFINI,
OPTION_LOADMAP,
OPTION_MAXDATA,
OPTION_MAXSTACK,
OPTION_MODTYPE,
OPTION_NOAUTOIMP,
OPTION_NOEXPALL,
OPTION_NOEXPFULL,
OPTION_NOSTRCMPCT,
OPTION_PD,
OPTION_PT,
OPTION_STRCMPCT,
OPTION_UNIX,
OPTION_32,
OPTION_64,
OPTION_LIBPATH,
OPTION_NOLIBPATH,
};
static void
gld${EMULATION_NAME}_add_options
(int ns, char **shortopts, int nl, struct option **longopts,
int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
{
static const char xtra_short[] = "D:H:KT:z";
static const struct option xtra_long[] = {
/* -binitfini has special handling in the linker backend. The native linker
uses the arguemnts to generate a table of init and fini functions for
the executable. The important use for this option is to support aix 4.2+
c++ constructors and destructors. This is tied into gcc via collect2.c.
The function table is accessed by the runtime linker/loader by checking if
the first symbol in the loader symbol table is __rtinit. The gnu linker
generates this symbol and makes it the first loader symbol. */
{"basis", no_argument, NULL, OPTION_IGNORE},
{"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
{"bcomprld", no_argument, NULL, OPTION_IGNORE},
{"bcrld", no_argument, NULL, OPTION_IGNORE},
{"bcror31", no_argument, NULL, OPTION_IGNORE},
{"bD", required_argument, NULL, OPTION_MAXDATA},
{"bE", required_argument, NULL, OPTION_EXPORT},
{"bernotok", no_argument, NULL, OPTION_ERNOTOK},
{"berok", no_argument, NULL, OPTION_EROK},
{"berrmsg", no_argument, NULL, OPTION_IGNORE},
{"bexpall", no_argument, NULL, OPTION_EXPALL},
{"bexpfull", no_argument, NULL, OPTION_EXPFULL},
{"bexport", required_argument, NULL, OPTION_EXPORT},
{"bbigtoc", no_argument, NULL, OPTION_IGNORE},
{"bf", no_argument, NULL, OPTION_ERNOTOK},
{"bgc", no_argument, &gc, 1},
{"bh", required_argument, NULL, OPTION_IGNORE},
{"bhalt", required_argument, NULL, OPTION_IGNORE},
{"bI", required_argument, NULL, OPTION_IMPORT},
{"bimport", required_argument, NULL, OPTION_IMPORT},
{"binitfini", required_argument, NULL, OPTION_INITFINI},
{"bl", required_argument, NULL, OPTION_LOADMAP},
{"bloadmap", required_argument, NULL, OPTION_LOADMAP},
{"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
{"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
{"bM", required_argument, NULL, OPTION_MODTYPE},
{"bmodtype", required_argument, NULL, OPTION_MODTYPE},
{"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
{"bnoexpall", no_argument, NULL, OPTION_NOEXPALL},
{"bnoexpfull", no_argument, NULL, OPTION_NOEXPFULL},
{"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
{"bnoentry", no_argument, NULL, OPTION_IGNORE},
{"bnogc", no_argument, &gc, 0},
{"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
{"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
{"bnotextro", no_argument, &textro, 0},
{"bnro", no_argument, &textro, 0},
{"bpD", required_argument, NULL, OPTION_PD},
{"bpT", required_argument, NULL, OPTION_PT},
{"bro", no_argument, &textro, 1},
{"brtl", no_argument, &rtld, 1},
{"bnortl", no_argument, &rtld, 0},
{"bnortllib", no_argument, &rtld, 0},
{"bS", required_argument, NULL, OPTION_MAXSTACK},
{"bso", no_argument, NULL, OPTION_AUTOIMP},
{"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
{"btextro", no_argument, &textro, 1},
{"b32", no_argument, NULL, OPTION_32},
{"b64", no_argument, NULL, OPTION_64},
{"static", no_argument, NULL, OPTION_NOAUTOIMP},
{"unix", no_argument, NULL, OPTION_UNIX},
{"blibpath", required_argument, NULL, OPTION_LIBPATH},
{"bnolibpath", required_argument, NULL, OPTION_NOLIBPATH},
{NULL, no_argument, NULL, 0}
};
/* Options supported by the AIX linker which we do not support:
-S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
-bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
-bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
-bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
-bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
-bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
-bx, -bX, -bxref. */
*shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
*longopts = xrealloc (*longopts,
nl * sizeof (struct option) + sizeof (xtra_long));
memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
}
static bool
gld${EMULATION_NAME}_parse_args (int argc, char **argv)
{
int indx;
/* If the current option starts with -b, change the first : to an =.
The AIX linker uses : to separate the option from the argument;
changing it to = lets us treat it as a getopt option. */
indx = optind;
if (indx == 0)
indx = 1;
if (indx < argc && startswith (argv[indx], "-b"))
{
char *s;
for (s = argv[indx]; *s != '\0'; s++)
{
if (*s == ':')
{
*s = '=';
break;
}
}
}
return false;
}
/* Helper for option '-f', which specify a list of input files.
Contrary to the native linker, we don't support shell patterns
(simply because glob isn't always available). */
static void
read_file_list (const char *filename)
{
FILE *f;
/* An upper bound on the number of characters in the file. */
long pos;
/* File in memory. */
char *buffer;
size_t len;
char *b;
char *e;
f = fopen (filename, FOPEN_RT);
if (f == NULL)
{
einfo (_("%F%P: cannot open %s\n"), filename);
return;
}
if (fseek (f, 0L, SEEK_END) == -1)
goto error;
pos = ftell (f);
if (pos == -1)
goto error;
if (fseek (f, 0L, SEEK_SET) == -1)
goto error;
buffer = (char *) xmalloc (pos + 1);
len = fread (buffer, sizeof (char), pos, f);
if (len != (size_t) pos && ferror (f))
goto error;
/* Add a NUL terminator. */
buffer[len] = '\0';
fclose (f);
/* Parse files. */
b = buffer;
while (1)
{
/* Skip empty lines. */
while (*b == '\n' || *b == '\r')
b++;
/* Stop if end of buffer. */
if (b == buffer + len)
break;
/* Eat any byte until end of line. */
for (e = b; *e != '\0'; e++)
if (*e == '\n' || *e == '\r')
break;
/* Replace end of line by nul. */
if (*e != '\0')
*e++ = '\0';
if (b != e)
lang_add_input_file (b, lang_input_file_is_search_file_enum, NULL);
b = e;
}
return;
error:
einfo (_("%F%P: cannot read %s\n"), optarg);
fclose (f);
}
static bool
gld${EMULATION_NAME}_handle_option (int optc)
{
bfd_signed_vma val;
const char *end;
switch (optc)
{
default:
return false;
case 0:
/* Long option which just sets a flag. */
break;
case 'f':
/* This overrides --auxiliary. This option specifies a file containing
a list of input files. */
read_file_list (optarg);
break;
case 'D':
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
einfo (_("%P: warning: ignoring invalid -D number %s\n"), optarg);
else if (val != -1)
lang_section_start (".data", exp_intop (val), NULL);
break;
case 'H':
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0' || (val & (val - 1)) != 0)
einfo (_("%P: warning: ignoring invalid -H number %s\n"), optarg);
else
file_align = val;
break;
case 'K':
case 'z':
/* FIXME: This should use the page size for the target system. */
file_align = 4096;
break;
case 'T':
/* On AIX this is the same as GNU ld -Ttext. When we see -T
number, we assume the AIX option is intended. Otherwise, we
assume the usual GNU ld -T option is intended. We can't just
ignore the AIX option, because gcc passes it to the linker. */
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
return false;
lang_section_start (".text", exp_intop (val), NULL);
break;
case OPTION_IGNORE:
break;
case OPTION_INITFINI:
{
/*
* The aix linker init fini has the format :
*
* -binitfini:[ Initial][:Termination][:Priority]
*
* it allows the Termination and Priority to be optional.
*
* Since we support only one init/fini pair, we ignore the Priority.
*
* Define the special symbol __rtinit.
*
* strtok does not correctly handle the case of -binitfini::fini: so
* do it by hand
*/
char *t, *i, *f;
i = t = optarg;
while (*t && ':' != *t)
t++;
if (*t)
*t++ = 0;
if (0 != strlen (i))
link_info.init_function = i;
f = t;
while (*t && ':' != *t)
t++;
*t = 0;
if (0 != strlen (f))
link_info.fini_function = f;
}
break;
case OPTION_AUTOIMP:
link_info.static_link = false;
break;
case OPTION_ERNOTOK:
link_info.unresolved_syms_in_objects = RM_DIAGNOSE;
link_info.unresolved_syms_in_shared_libs = RM_DIAGNOSE;
break;
case OPTION_EROK:
link_info.unresolved_syms_in_objects = RM_IGNORE;
link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
break;
case OPTION_EXPALL:
auto_export_flags |= XCOFF_EXPALL;
explicit_auto_export_flags |= XCOFF_EXPALL;
break;
case OPTION_EXPFULL:
auto_export_flags |= XCOFF_EXPFULL;
explicit_auto_export_flags |= XCOFF_EXPFULL;
break;
case OPTION_EXPORT:
gld${EMULATION_NAME}_read_file (optarg, false);
break;
case OPTION_IMPORT:
{
struct filelist *n;
struct filelist **flpp;
n = (struct filelist *) xmalloc (sizeof (struct filelist));
n->next = NULL;
n->name = optarg;
flpp = &import_files;
while (*flpp != NULL)
flpp = &(*flpp)->next;
*flpp = n;
}
break;
case OPTION_LOADMAP:
config.map_filename = optarg;
break;
case OPTION_MAXDATA:
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
einfo (_("%P: warning: ignoring invalid -bmaxdata number %s\n"),
optarg);
else
maxdata = val;
break;
case OPTION_MAXSTACK:
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
einfo (_("%P: warning: ignoring invalid -bmaxstack number %s\n"),
optarg);
else
maxstack = val;
break;
case OPTION_MODTYPE:
if (*optarg == 'S')
{
link_info.type = type_dll;
++optarg;
}
if (*optarg == '\0' || optarg[1] == '\0')
einfo (_("%P: warning: ignoring invalid module type %s\n"), optarg);
else
modtype = (*optarg << 8) | optarg[1];
break;
case OPTION_NOAUTOIMP:
link_info.static_link = true;
break;
case OPTION_NOEXPALL:
auto_export_flags &= ~XCOFF_EXPALL;
explicit_auto_export_flags |= XCOFF_EXPALL;
break;
case OPTION_NOEXPFULL:
auto_export_flags &= ~XCOFF_EXPFULL;
explicit_auto_export_flags |= XCOFF_EXPFULL;
break;
case OPTION_NOSTRCMPCT:
link_info.traditional_format = true;
break;
case OPTION_PD:
/* This sets the page that the .data section is supposed to
start on. The offset within the page should still be the
offset within the file, so we need to build an appropriate
expression. */
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
einfo (_("%P: warning: ignoring invalid -pD number %s\n"), optarg);
else
{
etree_type *t;
t = exp_binop ('+',
exp_intop (val),
exp_binop ('&',
exp_nameop (NAME, "."),
exp_intop (0xfff)));
t = exp_binop ('&',
exp_binop ('+', t, exp_intop (31)),
exp_intop (~(bfd_vma) 31));
lang_section_start (".data", t, NULL);
}
break;
case OPTION_PT:
/* This set the page that the .text section is supposed to start
on. The offset within the page should still be the offset
within the file. */
val = bfd_scan_vma (optarg, &end, 0);
if (*end != '\0')
einfo (_("%P: warning: ignoring invalid -pT number %s\n"), optarg);
else
{
etree_type *t;
t = exp_binop ('+',
exp_intop (val),
exp_nameop (SIZEOF_HEADERS, NULL));
t = exp_binop ('&',
exp_binop ('+', t, exp_intop (31)),
exp_intop (~(bfd_vma) 31));
lang_section_start (".text", t, NULL);
}
break;
case OPTION_STRCMPCT:
link_info.traditional_format = false;
break;
case OPTION_UNIX:
unix_ld = true;
break;
case OPTION_32:
is_64bit = 0;
syscall_mask = 0x77;
symbol_mode_mask = 0x0d;
break;
case OPTION_64:
is_64bit = 1;
syscall_mask = 0xcc;
symbol_mode_mask = 0x0e;
break;
case OPTION_LIBPATH:
command_line_blibpath = optarg;
break;
case OPTION_NOLIBPATH:
command_line_blibpath = NULL;
break;
}
return true;
}
/* This is called when an input file can not be recognized as a BFD
object or an archive. If the file starts with #!, we must treat it
as an import file. This is for AIX compatibility. */
static bool
gld${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry)
{
FILE *e;
bool ret;
e = fopen (entry->filename, FOPEN_RT);
if (e == NULL)
return false;
ret = false;
if (getc (e) == '#' && getc (e) == '!')
{
struct filelist *n;
struct filelist **flpp;
n = (struct filelist *) xmalloc (sizeof (struct filelist));
n->next = NULL;
n->name = entry->filename;
flpp = &import_files;
while (*flpp != NULL)
flpp = &(*flpp)->next;
*flpp = n;
ret = true;
entry->flags.loaded = true;
}
fclose (e);
return ret;
}
/* This is called after the input files have been opened. */
static void
gld${EMULATION_NAME}_after_open (void)
{
enum output_type t;
struct set_info *p;
after_open_default ();
/* Call ldctor_build_sets, after pretending that this is a
relocatable link. We do this because AIX requires relocation
entries for all references to symbols, even in a final
executable. Of course, we only want to do this if we are
producing an XCOFF output file. */
t = link_info.type;
if (strstr (bfd_get_target (link_info.output_bfd), "xcoff") != NULL)
link_info.type = type_relocatable;
ldctor_build_sets ();
link_info.type = t;
/* For each set, record the size, so that the XCOFF backend can
output the correct csect length. */
for (p = sets; p != (struct set_info *) NULL; p = p->next)
{
bfd_size_type size;
/* If the symbol is defined, we may have been invoked from
collect, and the sets may already have been built, so we do
not do anything. */
if (p->h->type == bfd_link_hash_defined
|| p->h->type == bfd_link_hash_defweak)
continue;
if (p->reloc != BFD_RELOC_CTOR)
{
/* Handle this if we need to. */
abort ();
}
size = (p->count + 2) * 4;
if (!bfd_xcoff_link_record_set (link_info.output_bfd, &link_info,
p->h, size))
einfo (_("%F%P: bfd_xcoff_link_record_set failed: %E\n"));
}
}
/* This is called after the sections have been attached to output
sections, but before any sizes or addresses have been set. */
static void
gld${EMULATION_NAME}_before_allocation (void)
{
struct filelist *fl;
struct export_symbol_list *el;
char *libpath;
asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
static const char *const must_keep_sections[] = {
".text",
".data",
".bss"
};
unsigned int i, flags;
/* Handle the import and export files, if any. */
for (fl = import_files; fl != NULL; fl = fl->next)
gld${EMULATION_NAME}_read_file (fl->name, true);
for (el = export_symbols; el != NULL; el = el->next)
{
struct bfd_link_hash_entry *h;
h = bfd_link_hash_lookup (link_info.hash, el->name, false, false, false);
if (h == NULL)
einfo (_("%F%P: bfd_link_hash_lookup of export symbol failed: %E\n"));
if (!bfd_xcoff_export_symbol (link_info.output_bfd, &link_info, h))
einfo (_("%F%P: bfd_xcoff_export_symbol failed: %E\n"));
}
/* Track down all relocations called for by the linker script (these
are typically constructor/destructor entries created by
CONSTRUCTORS) and let the backend know it will need to create
.loader relocs for them. */
lang_for_each_statement (gld${EMULATION_NAME}_find_relocs);
/* Precedence of LIBPATH
-blibpath: native support always first
-rpath: gnu extension
-L build from command line -L's */
if (command_line_blibpath != NULL)
libpath = command_line_blibpath;
else if (command_line.rpath != NULL)
libpath = command_line.rpath;
else if (search_head == NULL)
libpath = (char *) "";
else
{
size_t len;
search_dirs_type *search;
/* PR ld/4023: Strip sysroot prefix from any paths
being inserted into the output binary's DT_RPATH. */
if (ld_sysroot != NULL
&& * ld_sysroot != 0)
{
const char * name = search_head->name;
size_t ld_sysroot_len = strlen (ld_sysroot);
if (strncmp (name, ld_sysroot, ld_sysroot_len) == 0)
name += ld_sysroot_len;
len = strlen (name);
libpath = xmalloc (len + 1);
strcpy (libpath, name);
for (search = search_head->next; search != NULL; search = search->next)
{
size_t nlen;
name = search->name;
if (strncmp (name, ld_sysroot, ld_sysroot_len) == 0)
name += ld_sysroot_len;
nlen = strlen (name);
libpath = xrealloc (libpath, len + nlen + 2);
libpath[len] = ':';
strcpy (libpath + len + 1, name);
len += nlen + 1;
}
}
else
{
len = strlen (search_head->name);
libpath = xmalloc (len + 1);
strcpy (libpath, search_head->name);
for (search = search_head->next; search != NULL; search = search->next)
{
size_t nlen;
nlen = strlen (search->name);
libpath = xrealloc (libpath, len + nlen + 2);
libpath[len] = ':';
strcpy (libpath + len + 1, search->name);
len += nlen + 1;
}
}
}
/* Default to -bexpfull for SVR4-like semantics. */
flags = (unix_ld ? XCOFF_EXPFULL : 0);
flags &= ~explicit_auto_export_flags;
flags |= auto_export_flags;
/* Let the XCOFF backend set up the .loader section. */
if (!bfd_xcoff_size_dynamic_sections
(link_info.output_bfd, &link_info, libpath, entry_symbol.name,
file_align, maxstack, maxdata, gc && !unix_ld,
modtype, textro, flags, special_sections, rtld))
einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
/* Look through the special sections, and put them in the right
place in the link ordering. This is especially magic. */
for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
{
asection *sec;
lang_output_section_statement_type *os;
lang_statement_union_type **pls;
lang_input_section_type *is;
const char *oname;
bool start;
sec = special_sections[i];
if (sec == NULL)
continue;
/* Remove this section from the list of the output section.
This assumes we know what the script looks like. */
is = NULL;
os = lang_output_section_get (sec->output_section);
if (os == NULL)
einfo (_("%F%P: can't find output section %s\n"),
sec->output_section->name);
for (pls = &os->children.head; *pls != NULL; pls = &(*pls)->header.next)
{
if ((*pls)->header.type == lang_input_section_enum
&& (*pls)->input_section.section == sec)
{
is = (lang_input_section_type *) * pls;
*pls = (*pls)->header.next;
break;
}
if ((*pls)->header.type == lang_wild_statement_enum)
{
lang_statement_union_type **pwls;
for (pwls = &(*pls)->wild_statement.children.head;
*pwls != NULL; pwls = &(*pwls)->header.next)
{
if ((*pwls)->header.type == lang_input_section_enum
&& (*pwls)->input_section.section == sec)
{
is = (lang_input_section_type *) * pwls;
*pwls = (*pwls)->header.next;
break;
}
}
if (is != NULL)
break;
}
}
if (is == NULL)
{
einfo (_("%F%P: can't find %s in output section\n"),
bfd_section_name (sec));
}
/* Now figure out where the section should go. */
switch (i)
{
default: /* to avoid warnings */
case XCOFF_SPECIAL_SECTION_TEXT:
/* _text */
oname = ".text";
start = true;
break;
case XCOFF_SPECIAL_SECTION_ETEXT:
/* _etext */
oname = ".text";
start = false;
break;
case XCOFF_SPECIAL_SECTION_DATA:
/* _data */
oname = ".data";
start = true;
break;
case XCOFF_SPECIAL_SECTION_EDATA:
/* _edata */
oname = ".data";
start = false;
break;
case XCOFF_SPECIAL_SECTION_END:
case XCOFF_SPECIAL_SECTION_END2:
/* _end and end */
oname = ".bss";
start = false;
break;
}
os = lang_output_section_find (oname);
if (start)
{
is->header.next = os->children.head;
os->children.head = (lang_statement_union_type *) is;
}
else
{
is->header.next = NULL;
*os->children.tail = (lang_statement_union_type *) is;
os->children.tail = &is->header.next;
}
}
/* Executables and shared objects must always have .text, .data
and .bss output sections, so that the header can refer to them.
The kernel refuses to load objects that have missing sections. */
if (!bfd_link_relocatable (&link_info))
for (i = 0; i < ARRAY_SIZE (must_keep_sections); i++)
{
asection *sec;
sec = bfd_get_section_by_name (link_info.output_bfd,
must_keep_sections[i]);
if (sec == NULL)
einfo (_("%P: can't find required output section %s\n"),
must_keep_sections[i]);
else
sec->flags |= SEC_KEEP;
}
/* Make sure .tdata is removed if empty, even with -r flag.
.tdata is always being generated because its size is needed
to cumpute .data address. */
if (bfd_link_relocatable (&link_info))
{
static const char *const thread_sections[] = {
".tdata",
".tbss"
};
/* Run lang_size_sections (if not already done). */
if (expld.phase != lang_mark_phase_enum)
{
expld.phase = lang_mark_phase_enum;
expld.dataseg.phase = exp_seg_none;
one_lang_size_sections_pass (NULL, false);
lang_reset_memory_regions ();
}
for (i = 0; i < ARRAY_SIZE (thread_sections); i++)
{
asection *sec;
sec = bfd_get_section_by_name (link_info.output_bfd,
thread_sections[i]);
if (sec != NULL && sec->rawsize == 0
&& (sec->flags & SEC_KEEP) == 0
&& !bfd_section_removed_from_list (link_info.output_bfd,
sec))
{
sec->flags |= SEC_EXCLUDE;
bfd_section_list_remove (link_info.output_bfd, sec);
link_info.output_bfd->section_count--;
}
}
}
before_allocation_default ();
}
static char *
gld${EMULATION_NAME}_choose_target (int argc, char **argv)
{
int i, j, jmax;
static char *from_outside;
static char *from_inside;
static char *argv_to_target[][2] = {
{NULL, "${OUTPUT_FORMAT}"},
{"-b32", "${OUTPUT_FORMAT_32BIT}"},
{"-b64", "${OUTPUT_FORMAT_64BIT}"},
};
jmax = 3;
from_outside = getenv (TARGET_ENVIRON);
if (from_outside != (char *) NULL)
return from_outside;
/* Set to default. */
from_inside = argv_to_target[0][1];
for (i = 1; i < argc; i++)
{
for (j = 1; j < jmax; j++)
{
if (0 == strcmp (argv[i], argv_to_target[j][0]))
from_inside = argv_to_target[j][1];
}
}
return from_inside;
}
/* Returns
1 : state changed
0 : no change */
static int
change_symbol_mode (char *input)
{
char *symbol_mode_string[] = {
"# 32", /* 0x01 */
"# 64", /* 0x02 */
"# no32", /* 0x04 */
"# no64", /* 0x08 */
NULL,
};
unsigned int bit;
char *string;
for (bit = 0;; bit++)
{
string = symbol_mode_string[bit];
if (string == NULL)
return 0;
if (0 == strcmp (input, string))
{
symbol_mode = (1 << bit);
return 1;
}
}
/* should not be here */
return 0;
}
/* Returns
1 : yes
0 : ignore
-1 : error, try something else */
static int
is_syscall (char *input, unsigned int *flag)
{
unsigned int bit;
char *string;
struct sc {
char *syscall_string;
unsigned int flag;
} s [] = {
{ "svc" /* 0x01 */, XCOFF_SYSCALL32 },
{ "svc32" /* 0x02 */, XCOFF_SYSCALL32 },
{ "svc3264" /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
{ "svc64" /* 0x08 */, XCOFF_SYSCALL64 },
{ "syscall" /* 0x10 */, XCOFF_SYSCALL32 },
{ "syscall32" /* 0x20 */, XCOFF_SYSCALL32 },
{ "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
{ "syscall64" /* 0x80 */, XCOFF_SYSCALL64 },
{ NULL, 0 },
};
*flag = 0;
for (bit = 0;; bit++)
{
string = s[bit].syscall_string;
if (string == NULL)
return -1;
if (0 == strcmp (input, string))
{
if (1 << bit & syscall_mask)
{
*flag = s[bit].flag;
return 1;
}
else
{
return 0;
}
}
}
/* should not be here */
return -1;
}
/* Read an import or export file. For an import file, this is called
by the before_allocation emulation routine. For an export file,
this is called by the handle_option emulation routine. */
static void
gld${EMULATION_NAME}_read_file (const char *filename, bool import)
{
struct obstack *o;
FILE *f;
int lineno;
int c;
bool keep;
const char *imppath;
const char *impfile;
const char *impmember;
o = (struct obstack *) xmalloc (sizeof (struct obstack));
obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
f = fopen (filename, FOPEN_RT);
if (f == NULL)
{
bfd_set_error (bfd_error_system_call);
einfo ("%F%P: %s: %E\n", filename);
return;
}
keep = false;
imppath = NULL;
impfile = NULL;
impmember = NULL;
lineno = 0;
/* Default to 32 and 64 bit mode
symbols at top of /lib/syscalls.exp do not have a mode modifier and they
are not repeated, assume 64 bit routines also want to use them.
See the routine change_symbol_mode for more information. */
symbol_mode = 0x04;
while ((c = getc (f)) != EOF)
{
char *s;
char *symname;
unsigned int syscall_flag = 0;
bfd_vma address;
struct bfd_link_hash_entry *h;
if (c != '\n')
{
obstack_1grow (o, c);
continue;
}
obstack_1grow (o, '\0');
++lineno;
s = (char *) obstack_base (o);
while (ISSPACE (*s))
++s;
if (*s == '\0'
|| *s == '*'
|| change_symbol_mode (s)
|| (*s == '#' && s[1] == ' ')
|| (!import && *s == '#' && s[1] == '!'))
{
obstack_free (o, obstack_base (o));
continue;
}
if (*s == '#' && s[1] == '!')
{
s += 2;
while (ISSPACE (*s))
++s;
if (*s == '\0')
{
imppath = NULL;
impfile = NULL;
impmember = NULL;
obstack_free (o, obstack_base (o));
}
else if (*s == '(')
einfo (_("%F%P:%s:%d: #! ([member]) is not supported "
"in import files\n"),
filename, lineno);
else
{
char cs;
char *start;
(void) obstack_finish (o);
keep = true;
start = s;
while (!ISSPACE (*s) && *s != '(' && *s != '\0')
++s;
cs = *s;
*s = '\0';
if (!bfd_xcoff_split_import_path (link_info.output_bfd,
start, &imppath, &impfile))
einfo (_("%F%P: could not parse import path: %E\n"));
while (ISSPACE (cs))
{
++s;
cs = *s;
}
if (cs != '(')
{
impmember = "";
if (cs != '\0')
einfo (_("%P:%s:%d: warning: syntax error in import file\n"),
filename, lineno);
}
else
{
++s;
impmember = s;
while (*s != ')' && *s != '\0')
++s;
if (*s == ')')
*s = '\0';
else
einfo (_("%P:%s:%d: warning: syntax error in import file\n"),
filename, lineno);
}
}
continue;
}
if (symbol_mode & symbol_mode_mask)
{
/* This is a symbol to be imported or exported. */
symname = s;
syscall_flag = 0;
address = (bfd_vma) -1;
while (!ISSPACE (*s) && *s != '\0')
++s;
if (*s != '\0')
{
char *se;
*s++ = '\0';
while (ISSPACE (*s))
++s;
se = s;
while (!ISSPACE (*se) && *se != '\0')
++se;
if (*se != '\0')
{
*se++ = '\0';
while (ISSPACE (*se))
++se;
if (*se != '\0')
einfo (_("%P:%s%d: warning: syntax error in "
"import/export file\n"),
filename, lineno);
}
if (s != se)
{
int status;
const char *end;
status = is_syscall (s, &syscall_flag);
if (0 > status)
{
/* not a system call, check for address */
address = bfd_scan_vma (s, &end, 0);
if (*end != '\0')
{
einfo (_("%P:%s:%d: warning: syntax error in "
"import/export file\n"),
filename, lineno);
}
}
}
}
if (!import)
{
struct export_symbol_list *n;
ldlang_add_undef (symname, true);
n = ((struct export_symbol_list *)
xmalloc (sizeof (struct export_symbol_list)));
n->next = export_symbols;
n->name = xstrdup (symname);
export_symbols = n;
}
else
{
h = bfd_link_hash_lookup (link_info.hash, symname, false, false,
true);
if (h == NULL || h->type == bfd_link_hash_new)
{
/* We can just ignore attempts to import an unreferenced
symbol. */
}
else
{
if (!bfd_xcoff_import_symbol (link_info.output_bfd,
&link_info, h,
address, imppath, impfile,
impmember, syscall_flag))
einfo (_("%X%P:%s:%d: failed to import symbol %s: %E\n"),
filename, lineno, symname);
}
}
}
obstack_free (o, obstack_base (o));
}
if (obstack_object_size (o) > 0)
{
einfo (_("%P:%s:%d: warning: ignoring unterminated last line\n"),
filename, lineno);
obstack_free (o, obstack_base (o));
}
if (!keep)
{
obstack_free (o, NULL);
free (o);
}
fclose (f);
}
/* This routine saves us from worrying about declaring free. */
static void
gld${EMULATION_NAME}_free (void *p)
{
free (p);
}
/* This is called by the before_allocation routine via
lang_for_each_statement. It looks for relocations and assignments
to symbols. */
static void
gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *s)
{
if (s->header.type == lang_reloc_statement_enum)
{
lang_reloc_statement_type *rs;
rs = &s->reloc_statement;
if (rs->name == NULL)
einfo (_("%F%P: only relocations against symbols are permitted\n"));
if (!bfd_xcoff_link_count_reloc (link_info.output_bfd, &link_info,
rs->name))
einfo (_("%F%P: bfd_xcoff_link_count_reloc failed: %E\n"));
}
if (s->header.type == lang_assignment_statement_enum)
gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
}
/* Look through an expression for an assignment statement. */
static void
gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
{
struct bfd_link_hash_entry *h;
switch (exp->type.node_class)
{
case etree_provide:
case etree_provided:
h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
false, false, false);
if (h == NULL)
break;
/* Fall through. */
case etree_assign:
if (strcmp (exp->assign.dst, ".") != 0)
{
if (!bfd_xcoff_record_link_assignment (link_info.output_bfd,
&link_info,
exp->assign.dst))
einfo (_("%F%P: failed to record assignment to %s: %E\n"),
exp->assign.dst);
}
gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
break;
case etree_binary:
gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
break;
case etree_trinary:
gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
break;
case etree_unary:
gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
break;
default:
break;
}
}
static char *
gld${EMULATION_NAME}_get_script (int *isfile)
EOF
if test x"$COMPILE_IN" = xyes
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f ${srcdir}/emultempl/ostring.sed"
fragment <<EOF
{
*isfile = 0;
if (bfd_link_relocatable (&link_info) && config.build_constructors)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
echo ' ; else return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
echo '; }' >> e${EMULATION_NAME}.c
else
# Scripts read from the filesystem.
fragment <<EOF
{
*isfile = 1;
if (bfd_link_relocatable (&link_info) && config.build_constructors)
return "ldscripts/${EMULATION_NAME}.xu";
else if (bfd_link_relocatable (&link_info))
return "ldscripts/${EMULATION_NAME}.xr";
else if (!config.text_read_only)
return "ldscripts/${EMULATION_NAME}.xbn";
else if (!config.magic_demand_paged)
return "ldscripts/${EMULATION_NAME}.xn";
else
return "ldscripts/${EMULATION_NAME}.x";
}
EOF
fi
fragment <<EOF
static void
gld${EMULATION_NAME}_create_output_section_statements (void)
{
/* __rtinit */
if ((bfd_get_flavour (link_info.output_bfd) == bfd_target_xcoff_flavour)
&& (link_info.init_function != NULL
|| link_info.fini_function != NULL
|| rtld))
{
initfini_file = lang_add_input_file ("initfini",
lang_input_file_is_file_enum,
NULL);
initfini_file->the_bfd = bfd_create ("initfini", link_info.output_bfd);
if (initfini_file->the_bfd == NULL
|| ! bfd_set_arch_mach (initfini_file->the_bfd,
bfd_get_arch (link_info.output_bfd),
bfd_get_mach (link_info.output_bfd)))
{
einfo (_("%F%P: can not create BFD: %E\n"));
return;
}
/* Call backend to fill in the rest */
if (! bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
link_info.init_function,
link_info.fini_function,
rtld))
{
einfo (_("%F%P: can not create BFD: %E\n"));
return;
}
/* __rtld defined in /lib/librtl.a */
if (rtld)
lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL);
}
}
static void
gld${EMULATION_NAME}_set_output_arch (void)
{
bfd_set_arch_mach (link_info.output_bfd,
bfd_xcoff_architecture (link_info.output_bfd),
bfd_xcoff_machine (link_info.output_bfd));
ldfile_output_architecture = bfd_get_arch (link_info.output_bfd);
ldfile_output_machine = bfd_get_mach (link_info.output_bfd);
ldfile_output_machine_name = bfd_printable_name (link_info.output_bfd);
}
static bool
gld${EMULATION_NAME}_open_dynamic_archive (const char *arch,
search_dirs_type *search,
lang_input_statement_type *entry)
{
char *path;
if (!entry->flags.maybe_archive)
return false;
if (entry->flags.full_name_provided)
path = concat (search->name, "/", entry->filename,
(const char *) NULL);
else
path = concat (search->name, "/lib", entry->filename, arch, ".a",
(const char *) NULL);
if (!ldfile_try_open_bfd (path, entry))
{
free (path);
return false;
}
/* Don't include the searched directory in the import path. */
bfd_xcoff_set_archive_import_path (&link_info, entry->the_bfd,
path + strlen (search->name) + 1);
entry->filename = path;
return true;
}
static bool
gld${EMULATION_NAME}_print_symbol (struct bfd_link_hash_entry *hash_entry,
void *ptr)
{
asection *sec = (asection *) ptr;
if ((hash_entry->type == bfd_link_hash_defined
|| hash_entry->type == bfd_link_hash_defweak)
&& sec == hash_entry->u.def.section)
{
int i;
struct xcoff_link_hash_entry *h;
for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++)
print_space ();
minfo ("0x%V ",
(hash_entry->u.def.value
+ hash_entry->u.def.section->output_offset
+ hash_entry->u.def.section->output_section->vma));
/* Flag symbol if it has been garbage collected. */
h = (struct xcoff_link_hash_entry *) hash_entry;
if ((h != NULL) && !(h->flags & XCOFF_MARK))
minfo (" -->gc");
minfo (" %pT\n", hash_entry->root.string);
}
return true;
}
EOF
LDEMUL_AFTER_OPEN=gld${EMULATION_NAME}_after_open
LDEMUL_SET_OUTPUT_ARCH=gld${EMULATION_NAME}_set_output_arch
LDEMUL_CHOOSE_TARGET=gld${EMULATION_NAME}_choose_target
LDEMUL_BEFORE_ALLOCATION=gld${EMULATION_NAME}_before_allocation
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=gld${EMULATION_NAME}_create_output_section_statements
LDEMUL_OPEN_DYNAMIC_ARCHIVE=gld${EMULATION_NAME}_open_dynamic_archive
LDEMUL_PARSE_ARGS=gld${EMULATION_NAME}_parse_args
LDEMUL_ADD_OPTIONS=gld${EMULATION_NAME}_add_options
LDEMUL_HANDLE_OPTION=gld${EMULATION_NAME}_handle_option
LDEMUL_UNRECOGNIZED_FILE=gld${EMULATION_NAME}_unrecognized_file
LDEMUL_PRINT_SYMBOL=gld${EMULATION_NAME}_print_symbol
source_em ${srcdir}/emultempl/emulation.em
Reference in a new issue Copy permalink