From: Richard Stallman Date: Thu, 6 Feb 1992 22:06:40 +0000 (+0000) Subject: Initial revision X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4e81a331e8df2459d19b82449b640938d9fd379b;p=gcc.git Initial revision From-SVN: r287 --- diff --git a/gcc/collect2.c b/gcc/collect2.c new file mode 100644 index 00000000000..814db0b4139 --- /dev/null +++ b/gcc/collect2.c @@ -0,0 +1,1704 @@ +/* Collect static initialization info into data structures + that can be traversed by C++ initialization and finalization + routines. + + Copyright (C) 1992 Free Software Foundation, Inc. + Contributed by Chris Smith (csmith@convex.com). + Heavily modified by Michael Meissner (meissner@osf.org), + Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com). + +This file is part of GNU CC. + +GNU CC 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 2, or (at your option) +any later version. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* Build tables of static constructors and destructors and run ld. */ + +#include +#include +#include +#include +#include +#include "gstddef.h" +#include +#include +#include +#include +#include + +#define COLLECT + +#include "config.h" + +#ifndef __STDC__ +#include "gvarargs.h" +#define generic char +#define PROTO(x) () +#define const + +#else +#include "stdarg.h" +#define generic void +#define PROTO(x) x +#endif + +#ifdef OBJECT_FORMAT_ROSE + +#ifdef _OSF_SOURCE +#define USE_MMAP +#endif + +#ifdef USE_MMAP +#include +#endif + +#include +#include +#include +#include +#include +#endif /* OBJECT_FORMAT_ROSE */ + +/* Default flags to pass to nm. */ +#ifndef NM_FLAGS +#define NM_FLAGS "-p" +#endif + +#ifdef USG +#define vfork fork +#endif + +/* On MSDOS, write temp files in current dir + because there's no place else we can expect to use. */ +#if __MSDOS__ +#ifndef P_tmpdir +#define P_tmpdir "./" +#endif +#endif + + +/* Linked lists of constructor and destructor names. */ + +struct id +{ + struct id *next; + int sequence; + char name[1]; +}; + +struct head +{ + struct id *first; + struct id *last; + int number; +}; + +/* Enumeration giving which pass this is for scanning the program file. */ + +enum pass { + PASS_FIRST, /* without constructors */ + PASS_SECOND /* with constructors linked in */ +}; + +extern char *sys_siglist[]; +extern char *version_string; + +static int vflag; /* true if -v */ +static int rflag; /* true if -r */ + +static int debug; /* true if -debug */ + +static int temp_filename_length; /* Length of temp_filename */ +static char *temp_filename; /* Base of temp filenames */ +static char *c_file; /* .c for constructor/destructor list. */ +static char *o_file; /* .o for constructor/destructor list. */ +static char *nm_file_name; /* pathname of nm */ + +static struct head constructors; /* list of constructors found */ +static struct head destructors; /* list of destructors found */ + +extern char *getenv PROTO(( const char * )); +extern char *mktemp PROTO(( char * )); +extern int vfork PROTO(( void )); +static void add_to_list PROTO(( struct head *headp, char *name )); +static void scan_prog_file PROTO(( char *, enum pass )); +static void fork_execute PROTO(( char *, char **argv )); +static void do_wait PROTO(( char * )); +static void write_c_file PROTO(( FILE *, char * )); +static void my_exit PROTO(( int )); +static void handler PROTO(( int )); +static void maybe_unlink PROTO(( char * )); +static void choose_temp_base PROTO(( void )); + +generic *xcalloc PROTO(( size_t, size_t )); +generic *xmalloc PROTO(( size_t )); + + + +#if !defined(HAVE_STRERROR) && !defined(_OSF_SOURCE) + +char *strerror (e) + int e; +{ + extern char *sys_errlist[]; + extern int sys_nerr; + static char buffer[30]; + + if (!e) + return ""; + + if (e > 0 && e < sys_nerr) + return sys_errlist[e]; + + sprintf (buffer, "Unknown error %d", e); + return buffer; +} + +#endif + + +/* Delete tempfiles and exit function. */ + +static void +my_exit (status) + int status; +{ + if (c_file[0]) + maybe_unlink (c_file); + + if (o_file[0]) + maybe_unlink (o_file); + + exit (status); +} + + +#ifndef __STDC__ + +/* Die when sys call fails. */ + +/*VARARGS*/ +static void +fatal_perror (va_alist) +{ + char *string; + va_list vptr; + int e = errno; + + va_start (vptr); + string = va_arg (vptr, char *); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, ": %s\n", strerror (e)); + va_end (vptr); + my_exit (1); +} + +/* Just die. */ + +/*VARARGS*/ +static void +fatal (va_alist) +{ + char *string; + va_list vptr; + + va_start (vptr); + string = va_arg (vptr, char *); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, "\n"); + va_end (vptr); + my_exit (1); +} + +/* Write error message. */ + +/*VARARGS*/ +static void +error (va_alist) +{ + char *string; + va_list vptr; + + va_start (vptr); + string = va_arg (vptr, char *); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, "\n"); + va_end (vptr); +} + +#else + +static void +fatal_perror (char *string, ...) +{ + va_list vptr; + int e = errno; + + va_start (vptr, string); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, ": %s\n", strerror (e)); + va_end (vptr); + my_exit (1); +} + +/* Just die. */ + +static void +fatal (char *string, ...) +{ + va_list vptr; + + va_start (vptr, string); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, "\n"); + va_end (vptr); + my_exit (1); +} + +/* Write error message. */ + +static void +error (char *string, ...) +{ + va_list vptr; + + va_start (vptr, string); + fprintf (stderr, "collect: "); + vfprintf (stderr, string, vptr); + fprintf (stderr, "\n"); + va_end (vptr); +} +#endif + + +/* In case obstack is linked in, and abort is defined to fancy_abort, + provide a default entry. */ + +void +fancy_abort () +{ + fatal ("internal error"); +} + + +static void +handler (signo) + int signo; +{ + if (c_file[0]) + maybe_unlink (c_file); + + if (o_file[0]) + maybe_unlink (o_file); + + signal (signo, SIG_DFL); + + fatal ("Caught signal %d [%s]", signo, sys_siglist[signo]); + kill (getpid (), signo); +} + + +generic * +xcalloc (size1, size2) + size_t size1, size2; +{ + generic *ptr = calloc (size1, size2); + if (ptr) + return ptr; + + fatal ("Out of memory."); + return (generic *)0; +} + +generic * +xmalloc (size) + size_t size; +{ + generic *ptr = malloc (size); + if (ptr) + return ptr; + + fatal ("Out of memory."); + return (generic *)0; +} + + +/* Compute a string to use as the base of all temporary file names. + It is substituted for %g. */ + +static void +choose_temp_base PROTO((void)) +{ + char *base = getenv ("TMPDIR"); + int len; + + if (base == (char *)0) + { +#ifdef P_tmpdir + if (access (P_tmpdir, R_OK | W_OK) == 0) + base = P_tmpdir; +#endif + if (base == (char *)0) + { + if (access ("/usr/tmp", R_OK | W_OK) == 0) + base = "/usr/tmp/"; + else + base = "/tmp/"; + } + } + + len = strlen (base); + temp_filename = xmalloc (len + sizeof("/ccXXXXXX")); + strcpy (temp_filename, base); + if (len > 0 && temp_filename[len-1] != '/') + temp_filename[len++] = '/'; + strcpy (temp_filename + len, "ccXXXXXX"); + + mktemp (temp_filename); + temp_filename_length = strlen (temp_filename); +} + + +/* Main program. */ + +int +main (argc, argv) + int argc; + char *argv[]; +{ + char *outfile = "a.out"; + char *arg; + FILE *outf; + char *ld_file_name; + char *c_file_name; + char *B_option; + char *p; + char *prefix; + char **c_argv = (char **) xcalloc (sizeof (char *), argc+7); + char **c_ptr = c_argv; + char **ld1_argv = (char **) xcalloc (sizeof (char *), argc+2); + char **ld1 = ld1_argv; + char **ld2_argv = (char **) xcalloc (sizeof (char *), argc+5); + char **ld2 = ld2_argv; + int first_file; + int len; + int clen; + +#ifdef DEBUG + debug = 1; + vflag = 1; +#endif + + if (argc < 2) + fatal ("no arguments"); + + signal (SIGQUIT, handler); + signal (SIGINT, handler); + signal (SIGALRM, handler); + signal (SIGHUP, handler); + signal (SIGSEGV, handler); + signal (SIGBUS, handler); + + /* Try to discover a valid linker/assembler/nm to use. */ + len = strlen (argv[0]); + prefix = (char *)0; + if (len >= sizeof ("ld")-1) + { + p = argv[0] + len - sizeof ("ld") + 1; + if (strcmp (p, "ld") == 0) + { + prefix = argv[0]; + *p = '\0'; + } + } + + if (prefix == (char *)0) + { + p = strrchr (argv[0], '/'); + if (p != (char *)0) + { + prefix = argv[0]; + p[1] = '\0'; + } + +#ifdef STANDARD_EXEC_PREFIX + else if (access (STANDARD_EXEC_PREFIX, X_OK) == 0) + prefix = STANDARD_EXEC_PREFIX; +#endif + +#ifdef MD_EXEC_PREFIX + else if (access (MD_EXEC_PREFIX, X_OK) == 0) + prefix = MD_EXEC_PREFIX; +#endif + + else if (access ("/usr/ccs/gcc", X_OK) == 0) + prefix = "/usr/ccs/gcc/"; + + else if (access ("/usr/ccs/bin", X_OK) == 0) + prefix = "/usr/ccs/bin/"; + + else + prefix = "/bin/"; + } + + clen = len = strlen (prefix); + +#ifdef STANDARD_BIN_PREFIX + if (clen < sizeof (STANDARD_BIN_PREFIX) - 1) + clen = sizeof (STANDARD_BIN_PREFIX) - 1; +#endif + + ld_file_name = xcalloc (len + sizeof ("real-ld"), 1); + c_file_name = xcalloc (clen + sizeof ("gcc"), 1); + nm_file_name = xcalloc (len + sizeof ("gnm"), 1); + B_option = xcalloc (len + sizeof ("-B"), 1); + + memcpy (ld_file_name, prefix, len); + strcpy (ld_file_name + len, "real-ld"); + if (access (ld_file_name, X_OK) < 0) + { + strcpy (ld_file_name + len, "gld"); + if (access (ld_file_name, X_OK) < 0) + { + free (ld_file_name); +#ifdef REAL_LD_FILE_NAME + ld_file_name = REAL_LD_FILE_NAME; +#else + ld_file_name = (access ("/usr/bin/ld", X_OK) == 0) ? "/usr/bin/ld" : "/bin/ld"; +#endif + } + } + + memcpy (c_file_name, prefix, len); + strcpy (c_file_name + len, "gcc"); + if (access (c_file_name, X_OK) < 0) + { +#ifdef STANDARD_BIN_PREFIX + strcpy (c_file_name, STANDARD_BIN_PREFIX); + strcat (c_file_name, "gcc"); + if (access (c_file_name, X_OK) < 0) +#endif + { +#ifdef STANDARD_EXEC_PREFIX + strcpy (c_file_name, STANDARD_EXEC_PREFIX); + strcat (c_file_name, "gcc"); + if (access (c_file_name, X_OK) < 0) +#endif + { + strcpy (c_file_name, "gcc"); + } + } + } + + memcpy (nm_file_name, prefix, len); + strcpy (nm_file_name + len, "nm"); + if (access (nm_file_name, X_OK) < 0) + { + strcpy (nm_file_name + len, "gnm"); + if (access (nm_file_name, X_OK) < 0) + { + free (nm_file_name); +#ifdef REAL_NM_FILE_NAME + nm_file_name = REAL_NM_FILE_NAME; +#else + nm_file_name = (access ("/usr/bin/nm", X_OK) == 0) ? "/usr/bin/nm" : "/bin/nm"; +#endif + } + } + + strcpy (B_option, "-B"); + strcpy (B_option + sizeof ("-B") - 1, prefix); + + *ld1++ = *ld2++ = "ld"; + + /* Make temp file names. */ + choose_temp_base (); + c_file = xcalloc (temp_filename_length + sizeof (".c"), 1); + o_file = xcalloc (temp_filename_length + sizeof (".o"), 1); + sprintf (c_file, "%s.c", temp_filename); + sprintf (o_file, "%s.o", temp_filename); + *c_ptr++ = "gcc"; + *c_ptr++ = "-c"; + *c_ptr++ = "-o"; + *c_ptr++ = o_file; + + /* Parse arguments. Remember output file spec, pass the rest to ld. */ + /* After the first file, put in the c++ rt0 */ + first_file = 1; + while ((arg = *++argv) != (char *)0) + { + *ld1++ = *ld2++ = arg; + + if (arg[0] == '-') + switch (arg[1]) + { + case 'd': + if (!strcmp (arg, "-debug")) + { + debug = 1; + vflag = 1; + ld1--; + ld2--; + } + break; + + /* pass -f, -B, -b, -V, and -m + options to gcc. This allows options to be passed + that affect search rules, and the size of pointers. */ + case 'b': + case 'B': + case 'f': + case 'm': + case 'V': + if (arg[1] != '\0') + { + ld1--; + ld2--; + *c_ptr++ = arg; + } + break; + + case 'o': + outfile = (arg[2] == '\0') ? argv[1] : &arg[2]; + break; + + case 'r': + if (arg[2] == '\0') + rflag = 1; + break; + + case 'v': + if (arg[2] == '\0') + vflag = 1; + break; + } + + else if (first_file + && (p = strrchr (arg, '.')) != (char *)0 + && strcmp (p, ".o") == 0) + { + first_file = 0; + *ld2++ = o_file; + } + } + + *c_ptr++ = B_option; + *c_ptr++ = c_file; + *c_ptr = *ld1 = *ld2 = (char *)0; + + if (vflag) + { + fprintf (stderr, "GNU COLLECT2 version %s", version_string); +#ifdef TARGET_VERSION + TARGET_VERSION; +#endif + fprintf (stderr, "\n"); + } + + if (debug) + { + fprintf (stderr, "prefix = %s\n", prefix); + fprintf (stderr, "ld_file_name = %s\n", ld_file_name); + fprintf (stderr, "c_file_name = %s\n", c_file_name); + fprintf (stderr, "nm_file_name = %s\n", nm_file_name); + fprintf (stderr, "B_option = %s\n", B_option); + fprintf (stderr, "c_file = %s\n", c_file); + fprintf (stderr, "o_file = %s\n", o_file); + } + + /* Load the program, searching all libraries. + Examine the namelist with nm and search it for static constructors + and destructors to call. + Write the constructor and destructor tables to a .s file and reload. */ + + fork_execute (ld_file_name, ld1_argv); + + /* If -r, don't build the constructor or destructor list, just return now. */ + if (rflag) + return 0; + + scan_prog_file (outfile, PASS_FIRST); + + if (debug) + { + fprintf (stderr, "%d constructor(s) found\n", constructors.number); + fprintf (stderr, "%d destructor(s) found\n", destructors.number); + } + + if (constructors.number == 0 && destructors.number == 0) + return 0; + + outf = fopen (c_file, "w"); + if (outf == (FILE *)0) + fatal_perror ("Can't write %s", c_file); + + write_c_file (outf, c_file); + + if (fclose (outf)) + fatal_perror ("Can't close %s", c_file); + + if (debug) + { + fprintf (stderr, "\n========== outfile = %s, c_file = %s\n", outfile, c_file); + write_c_file (stderr, "stderr"); + fprintf (stderr, "========== end of c_file\n\n"); + } + + /* Assemble the constructor and destructor tables. + Link the tables in with the rest of the program. */ + + fork_execute (c_file_name, c_argv); + fork_execute (ld_file_name, ld2_argv); + + /* Let scan_prog_file do any final mods (OSF/rose needs this for + constructors/destructors in shared libraries. */ + scan_prog_file (outfile, PASS_SECOND); + + maybe_unlink (c_file); + maybe_unlink (o_file); + return 0; +} + + +/* Wait for a process to finish, and exit if a non-zero status is found. */ + +static void +do_wait (prog) + char *prog; +{ + int status; + + wait (&status); + if (status) + { + int sig = WTERMSIG (status); + int ret; + + if (sig != -1 && sig != 0) + { + error ("%s terminated with signal %d [%s]%s", + prog, + sig, + sys_siglist[sig], + (status & 0200) ? ", core dumped" : ""); + + my_exit (127); + } + + ret = WEXITSTATUS (status); + if (ret != -1 && ret != 0) + { + error ("%s returned %d exit status", prog, ret); + my_exit (ret); + } + } +} + + +/* Fork and execute a program, and wait for the reply. */ + +static void +fork_execute (prog, argv) + char *prog; + char **argv; +{ + int pid; + void (*int_handler) PROTO((int)); + void (*quit_handler) PROTO((int)); + + if (vflag || debug) + { + char **p_argv; + char *str; + + fprintf (stderr, "%s", prog); + for (p_argv = &argv[1]; (str = *p_argv) != (char *)0; p_argv++) + fprintf (stderr, " %s", str); + + fprintf (stderr, "\n"); + } + + fflush (stdout); + fflush (stderr); + + pid = vfork (); + if (pid == -1) + fatal_perror ("vfork"); + + if (pid == 0) /* child context */ + { + execvp (prog, argv); + fatal_perror ("Execute %s", prog); + } + + int_handler = (void (*)PROTO((int)))signal (SIGINT, SIG_IGN); + quit_handler = (void (*)PROTO((int)))signal (SIGQUIT, SIG_IGN); + + do_wait (prog); + + signal (SIGINT, int_handler); + signal (SIGQUIT, quit_handler); +} + + +/* Unlink a file unless we are debugging. */ + +static void +maybe_unlink (file) + char *file; +{ + if (!debug) + unlink (file); + else + fprintf (stderr, "[Leaving %s]\n", file); +} + + +/* Add a name to a linked list. */ + +static void +add_to_list (head_ptr, name) + struct head *head_ptr; + char *name; +{ + struct id *newid = (struct id *) xcalloc (sizeof (*newid) + strlen (name), 1); + static long sequence_number = 0; + newid->sequence = ++sequence_number; + strcpy (newid->name, name); + + if (head_ptr->first) + head_ptr->last->next = newid; + else + head_ptr->first = newid; + + head_ptr->last = newid; + head_ptr->number++; +} + +/* Write: `prefix', the names on list LIST, `suffix'. */ + +static void +write_list (stream, prefix, list) + FILE *stream; + char *prefix; + struct id *list; +{ + while (list) + { + fprintf (stream, "%sx%d,\n", prefix, list->sequence); + list = list->next; + } +} + +static void +write_list_with_asm (stream, prefix, list) + FILE *stream; + char *prefix; + struct id *list; +{ + while (list) + { + fprintf (stream, "%sx%d asm (\"%s\");\n", + prefix, list->sequence, list->name); + list = list->next; + } +} + +/* Write the constructor/destructor tables. */ + +static void +write_c_file (stream, name) + FILE *stream; + char *name; +{ + /* Write the tables as C code */ + + fprintf (stream, "typedef void entry_pt();\n\n"); + + write_list_with_asm (stream, "entry_pt ", constructors); + + fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n"); + fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number); + write_list (stream, "\t", constructors); + fprintf (stream, "\t0\n};\n\n"); + + write_list_with_asm (stream, "entry_pt ", destructors); + + fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n"); + fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number); + write_list (stream, "\t", destructors); + fprintf (stream, "\t0\n};\n\n"); + + fprintf (stream, "extern entry_pt __main;\n"); + fprintf (stream, "entry_pt *__main_reference = __main;\n\n"); +} + + +#ifndef OBJECT_FORMAT_ROSE + +/* OSF/rose specific version to scan the name list of the loaded + program for the symbols g++ uses for static constructors and + destructors. + + The constructor table begins at __CTOR_LIST__ and contains a count + of the number of pointers (or -1 if the constructors are built in a + separate section by the linker), followed by the pointers to the + constructor functions, terminated with a null pointer. The + destructor table has the same format, and begins at __DTOR_LIST__. */ + +static void +scan_prog_file (prog_name, which_pass) + char *prog_name; + enum pass which_pass; +{ + void (*int_handler) PROTO((int)); + void (*quit_handler) PROTO((int)); + char *nm_argv[4]; + int pid; + int argc = 0; + int pipe_fd[2]; + char *p, buf[1024]; + FILE *inf; + + if (which_pass != PASS_FIRST) + return; + + nm_argv[ argc++ ] = "nm"; + if (NM_FLAGS[0] != '\0') + nm_argv[ argc++ ] = NM_FLAGS; + + nm_argv[ argc++ ] = prog_name; + nm_argv[ argc++ ] = (char *)0; + + if (pipe (pipe_fd) < 0) + fatal_perror ("pipe"); + + inf = fdopen (pipe_fd[0], "r"); + if (inf == (FILE *)0) + fatal_perror ("fdopen"); + + /* Trace if needed. */ + if (vflag) + { + char **p_argv; + char *str; + + fprintf (stderr, "%s", nm_file_name); + for (p_argv = &nm_argv[1]; (str = *p_argv) != (char *)0; p_argv++) + fprintf (stderr, " %s", str); + + fprintf (stderr, "\n"); + } + + fflush (stdout); + fflush (stderr); + + /* Spawn child nm on pipe */ + pid = vfork (); + if (pid == -1) + fatal_perror ("vfork"); + + if (pid == 0) /* child context */ + { + /* setup stdout */ + if (dup2 (pipe_fd[1], 1) < 0) + fatal_perror ("Dup2 (%d, 1)", pipe_fd[1]); + + if (close (pipe_fd[0]) < 0) + fatal_perror ("Close (%d)", pipe_fd[0]); + + if (close (pipe_fd[1]) < 0) + fatal_perror ("Close (%d)", pipe_fd[1]); + + execv (nm_file_name, nm_argv); + fatal_perror ("Execute %s", nm_file_name); + } + + /* Parent context from here on. */ + int_handler = (void (*)PROTO((int)))signal (SIGINT, SIG_IGN); + quit_handler = (void (*)PROTO((int)))signal (SIGQUIT, SIG_IGN); + + if (close (pipe_fd[1]) < 0) + fatal_perror ("Close (%d)", pipe_fd[1]); + + if (debug) + fprintf (stderr, "\nnm output with constructors/destructors.\n"); + + /* Read each line of nm output. */ + while (fgets (buf, sizeof buf, inf) != (char *)0) + { + int ch, ch2; + char *start; + char *end; + + /* If it contains a constructor or destructor name, add the name + to the appropriate list. */ + + for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++) + ; + + if (ch == '\0' || ch == '\n') + continue; + + start = p; + while ((ch = *p) == '_') /* skip any extra '_' inserted */ + p++; + + for (end = p; (ch2 = *end) != '\0' && !isspace (ch2); end++) + ; + + *end = '\0'; + if (ch == 'G') + { + if (! strncmp (p, "GLOBAL_$I$", 10)) + add_to_list (&constructors, p-1); + + else if (! strncmp (p, "GLOBAL_$D$", 10)) + add_to_list (&destructors, p-1); + + else /* not a constructor or destructor */ + continue; + } + + else if (ch == 's' && (p - start) >= 2) + { + if (! strncmp (p, "sti__", 5)) + add_to_list (&constructors, p-2); + + else if (! strncmp (p, "std__", 5)) + add_to_list (&destructors, p-2); + + else /* not a constructor or destructor */ + continue; + } + + else + continue; + + if (debug) + fprintf (stderr, "\t%s\n", buf); + } + + if (debug) + fprintf (stderr, "\n"); + + if (fclose (inf) != 0) + fatal_perror ("fclose of pipe"); + + do_wait (nm_file_name); + + signal (SIGINT, int_handler); + signal (SIGQUIT, quit_handler); +} + +#endif /* !OBJECT_FORMAT_ROSE */ + + +/* + * OSF/rose specific stuff. + */ + +#ifdef OBJECT_FORMAT_ROSE + +/* Union of the various load commands */ + +typedef union load_union +{ + ldc_header_t hdr; /* common header */ + load_cmd_map_command_t map; /* map indexing other load cmds */ + interpreter_command_t iprtr; /* interpereter pathname */ + strings_command_t str; /* load commands strings section */ + region_command_t region; /* region load command */ + reloc_command_t reloc; /* relocation section */ + package_command_t pkg; /* package load command */ + symbols_command_t sym; /* symbol sections */ + entry_command_t ent; /* program start section */ + gen_info_command_t info; /* object information */ + func_table_command_t func; /* function constructors/destructors */ +} load_union_t; + +/* Structure to point to load command and data section in memory. */ + +typedef struct load_all +{ + load_union_t *load; /* load command */ + char *section; /* pointer to section */ +} load_all_t; + +/* Structure to contain information about a file mapped into memory. */ + +struct file_info +{ + char *start; /* start of map */ + char *name; /* filename */ + long size; /* size of the file */ + long rounded_size; /* size rounded to page boundary */ + int fd; /* file descriptor */ + int rw; /* != 0 if opened read/write */ + int use_mmap; /* != 0 if mmap'ed */ +}; + +extern int decode_mach_o_hdr PROTO(( void *in_bufp, + size_t in_bufsize, + unsigned long hdr_version, + mo_header_t *headerp )); + +extern int encode_mach_o_hdr PROTO(( mo_header_t *headerp, + void *out_bufp, + size_t out_bufsize )); + +static void bad_header PROTO(( int status )); + +static void print_header PROTO(( mo_header_t *hdr_ptr )); + +static void print_load_command PROTO(( load_union_t *load_hdr, + size_t offset, + int number )); + +static void add_func_table PROTO(( mo_header_t *hdr_p, + load_all_t *load_array, + symbol_info_t *sym, + int type )); + +static struct file_info *read_file PROTO(( char *, int, int )); + +static void end_file PROTO(( struct file_info * )); + + +/* OSF/rose specific version to scan the name list of the loaded + program for the symbols g++ uses for static constructors and + destructors. + + The constructor table begins at __CTOR_LIST__ and contains a count + of the number of pointers (or -1 if the constructors are built in a + separate section by the linker), followed by the pointers to the + constructor functions, terminated with a null pointer. The + destructor table has the same format, and begins at __DTOR_LIST__. */ + +static void +scan_prog_file (prog_name, which_pass) + char *prog_name; + enum pass which_pass; +{ + char *obj; + mo_header_t hdr; + load_all_t *load_array; + load_all_t *load_end; + load_all_t *load_cmd; + int symbol_load_cmds; + off_t offset; + int i; + int num_syms; + int status; + char *str_sect; + struct file_info *obj_file; + int prog_fd; + mo_lcid_t cmd_strings = -1; + symbol_info_t *main_sym = 0; + int rw = (which_pass != PASS_FIRST); + + prog_fd = open (prog_name, (rw) ? O_RDWR : O_RDONLY); + if (prog_fd < 0) + fatal_perror ("Can't read %s", prog_name); + + obj_file = read_file (prog_name, prog_fd, rw); + obj = obj_file->start; + + status = decode_mach_o_hdr (obj, MO_SIZEOF_RAW_HDR, MOH_HEADER_VERSION, &hdr); + if (status != MO_HDR_CONV_SUCCESS) + bad_header (status); + + + /* Do some basic sanity checks. Note we explicitly use the big endian magic number, + since the hardware will automatically swap bytes for us on loading little endian + integers. */ + +#ifndef CROSS_COMPILE + if (hdr.moh_magic != MOH_MAGIC_MSB + || hdr.moh_header_version != MOH_HEADER_VERSION + || hdr.moh_byte_order != OUR_BYTE_ORDER + || hdr.moh_data_rep_id != OUR_DATA_REP_ID + || hdr.moh_cpu_type != OUR_CPU_TYPE + || hdr.moh_cpu_subtype != OUR_CPU_SUBTYPE + || hdr.moh_vendor_type != OUR_VENDOR_TYPE) + { + fatal ("incompatibilities exist between object file & expected values."); + } +#endif + + if (debug) + print_header (&hdr); + + offset = hdr.moh_first_cmd_off; + load_end = load_array + = (load_all_t *) xcalloc (sizeof (load_all_t), hdr.moh_n_load_cmds + 2); + + /* Build array of load commands, calculating the offsets */ + for (i = 0; i < hdr.moh_n_load_cmds; i++) + { + load_union_t *load_hdr; /* load command header */ + + load_cmd = load_end++; + load_hdr = (load_union_t *) (obj + offset); + + /* If modifing the program file, copy the header. */ + if (rw) + { + load_union_t *ptr = (load_union_t *) xmalloc (load_hdr->hdr.ldci_cmd_size); + memcpy (ptr, load_hdr, load_hdr->hdr.ldci_cmd_size); + load_hdr = ptr; + + /* null out old command map, because we will rewrite at the end. */ + if (ptr->hdr.ldci_cmd_type == LDC_CMD_MAP) + { + cmd_strings = ptr->map.lcm_ld_cmd_strings; + ptr->hdr.ldci_cmd_type = LDC_UNDEFINED; + } + } + + load_cmd->load = load_hdr; + if (load_hdr->hdr.ldci_section_off > 0) + load_cmd->section = obj + load_hdr->hdr.ldci_section_off; + + if (debug) + print_load_command (load_hdr, offset, i); + + offset += load_hdr->hdr.ldci_cmd_size; + } + + /* If the last command is the load command map and is not undefined, + decrement the count of load commands. */ + if (rw && load_end[-1].load->hdr.ldci_cmd_type == LDC_UNDEFINED) + { + load_end--; + hdr.moh_n_load_cmds--; + } + + /* Go through and process each symbol table section. */ + symbol_load_cmds = 0; + for (load_cmd = load_array; load_cmd < load_end; load_cmd++) + { + load_union_t *load_hdr = load_cmd->load; + + if (load_hdr->hdr.ldci_cmd_type == LDC_SYMBOLS) + { + symbol_load_cmds++; + + if (debug) + { + char *kind = "uknown"; + + switch (load_hdr->sym.symc_kind) + { + case SYMC_IMPORTS: kind = "imports"; break; + case SYMC_DEFINED_SYMBOLS: kind = "defined"; break; + case SYMC_STABS: kind = "stabs"; break; + } + + fprintf (stderr, "\nProcessing symbol table #%d, offset = 0x%.8lx, kind = %s\n", + symbol_load_cmds, load_hdr->hdr.ldci_section_off, kind); + } + + if (load_hdr->sym.symc_kind != SYMC_DEFINED_SYMBOLS) + continue; + + str_sect = load_array[ load_hdr->sym.symc_strings_section ].section; + if (str_sect == (char *)0) + fatal ("string section missing"); + + if (load_cmd->section == (char *)0) + fatal ("section pointer missing"); + + num_syms = load_hdr->sym.symc_nentries; + for (i = 0; i < num_syms; i++) + { + symbol_info_t *sym = ((symbol_info_t *) load_cmd->section) + i; + char *name = sym->si_name.symbol_name + str_sect; + char *name_start = name; + + if (name[0] != '_') + continue; + + while (*++name == '_') /* skip any extra '_' inserted */ + ; + + if (rw) + { + if (*name != 'm' || (name - name_start) < 2 + || strcmp (name, "main")) + continue; + + main_sym = sym; + } + + else if (*name == 'G') + { + if (! strncmp (name, "GLOBAL_$I$", 10)) + add_to_list (&constructors, name_start); + + else if (! strncmp (name, "GLOBAL_$D$", 10)) + add_to_list (&destructors, name_start); + + else /* not a constructor or destructor */ + continue; + } + + else if (*name == 's' && (name - name_start) > 2) + { + if (! strncmp (name, "sti__", 5)) + add_to_list (&constructors, name_start); + + else if (! strncmp (name, "std__", 5)) + add_to_list (&destructors, name_start); + + else /* not a constructor or destructor */ + continue; + } + + else + continue; + + if (debug) + fprintf (stderr, "\ttype = 0x%.4x, sc = 0x%.2x, flags = 0x%.8x, name = %.30s\n", + sym->si_type, sym->si_sc_type, sym->si_flags, name); + } + } + } + + if (symbol_load_cmds == 0) + fatal ("no symbol table found."); + + /* Update the program file now, rewrite header and load commands. At present, + we assume that there is enough space after the last load command to insert + one more. Since the first section written out is page aligned, and the + number of load commands is small, this is ok for the present. */ + + if (rw) + { + load_union_t *load_map; + size_t size; + + if (cmd_strings == -1) + fatal ("no cmd_strings found."); + + /* Add __main to initializer list. */ + if (main_sym != (symbol_info_t *)0) + add_func_table (&hdr, load_array, main_sym, FNTC_INITIALIZATION); + + if (debug) + fprintf (stderr, "\nUpdating header and load commands.\n\n"); + + hdr.moh_n_load_cmds++; + size = sizeof (load_cmd_map_command_t) + (sizeof (mo_offset_t) * (hdr.moh_n_load_cmds - 1)); + + /* Create new load command map. */ + if (debug) + fprintf (stderr, "load command map, %d cmds, new size %ld.\n", + (int)hdr.moh_n_load_cmds, (long)size); + + load_map = (load_union_t *) xcalloc (1, size); + load_map->map.ldc_header.ldci_cmd_type = LDC_CMD_MAP; + load_map->map.ldc_header.ldci_cmd_size = size; + load_map->map.lcm_ld_cmd_strings = cmd_strings; + load_map->map.lcm_nentries = hdr.moh_n_load_cmds; + load_array[hdr.moh_n_load_cmds-1].load = load_map; + + offset = hdr.moh_first_cmd_off; + for (i = 0; i < hdr.moh_n_load_cmds; i++) + { + load_map->map.lcm_map[i] = offset; + if (load_array[i].load->hdr.ldci_cmd_type == LDC_CMD_MAP) + hdr.moh_load_map_cmd_off = offset; + + offset += load_array[i].load->hdr.ldci_cmd_size; + } + + hdr.moh_sizeofcmds = offset - MO_SIZEOF_RAW_HDR; + + if (debug) + print_header (&hdr); + + /* Write header */ + status = encode_mach_o_hdr (&hdr, obj, MO_SIZEOF_RAW_HDR); + if (status != MO_HDR_CONV_SUCCESS) + bad_header (status); + + if (debug) + fprintf (stderr, "writing load commands.\n\n"); + + /* Write load commands */ + offset = hdr.moh_first_cmd_off; + for (i = 0; i < hdr.moh_n_load_cmds; i++) + { + load_union_t *load_hdr = load_array[i].load; + size_t size = load_hdr->hdr.ldci_cmd_size; + + if (debug) + print_load_command (load_hdr, offset, i); + + memcpy (obj + offset, load_hdr, size); + offset += size; + } + } + + end_file (obj_file); + + if (close (prog_fd)) + fatal_perror ("Can't close %s", prog_name); + + if (debug) + fprintf (stderr, "\n"); +} + + +/* Add a function table to the load commands to call a function + on initition or termination of the process. */ + +static void +add_func_table (hdr_p, load_array, sym, type) + mo_header_t *hdr_p; /* pointer to global header */ + load_all_t *load_array; /* array of ptrs to load cmds */ + symbol_info_t *sym; /* pointer to symbol entry */ + int type; /* fntc_type value */ +{ + /* Add a new load command. */ + int num_cmds = ++hdr_p->moh_n_load_cmds; + int load_index = num_cmds - 1; + size_t size = sizeof (func_table_command_t) + sizeof (mo_addr_t); + load_union_t *ptr = xcalloc (1, size); + load_all_t *load_cmd; + int i; + + /* Set the unresolved address bit in the header to force the loader to be + used, since kernel exec does not call the initialization functions. */ + hdr_p->moh_flags |= MOH_UNRESOLVED_F; + + load_cmd = &load_array[load_index]; + load_cmd->load = ptr; + load_cmd->section = (char *)0; + + /* Fill in func table load command. */ + ptr->func.ldc_header.ldci_cmd_type = LDC_FUNC_TABLE; + ptr->func.ldc_header.ldci_cmd_size = size; + ptr->func.ldc_header.ldci_section_off = 0; + ptr->func.ldc_header.ldci_section_len = 0; + ptr->func.fntc_type = type; + ptr->func.fntc_nentries = 1; + + /* copy address, turn it from abs. address to (region,offset) if necessary. */ + /* Is the symbol already expressed as (region, offset)? */ + if ((sym->si_flags & SI_ABSOLUTE_VALUE_F) == 0) + { + ptr->func.fntc_entry_loc[i].adr_lcid = sym->si_value.def_val.adr_lcid; + ptr->func.fntc_entry_loc[i].adr_sctoff = sym->si_value.def_val.adr_sctoff; + } + + /* If not, figure out which region it's in. */ + else + { + mo_vm_addr_t addr = sym->si_value.abs_val; + int found = 0; + + for (i = 0; i < load_index; i++) + { + if (load_array[i].load->hdr.ldci_cmd_type == LDC_REGION) + { + region_command_t *region_ptr = &load_array[i].load->region; + + if ((region_ptr->regc_flags & REG_ABS_ADDR_F) != 0 + && addr >= region_ptr->regc_addr.vm_addr + && addr <= region_ptr->regc_addr.vm_addr + region_ptr->regc_vm_size) + { + ptr->func.fntc_entry_loc[0].adr_lcid = i; + ptr->func.fntc_entry_loc[0].adr_sctoff = addr - region_ptr->regc_addr.vm_addr; + found++; + break; + } + } + } + + if (!found) + fatal ("could not convert 0x%l.8x into a region", addr); + } + + if (debug) + fprintf (stderr, + "%s function, region %d, offset = %ld (0x%.8lx)\n", + (type == FNTC_INITIALIZATION) ? "init" : "term", + (int)ptr->func.fntc_entry_loc[i].adr_lcid, + (long)ptr->func.fntc_entry_loc[i].adr_sctoff, + (long)ptr->func.fntc_entry_loc[i].adr_sctoff); + +} + + +/* Print the global header for an OSF/rose object. */ + +static void +print_header (hdr_ptr) + mo_header_t *hdr_ptr; +{ + fprintf (stderr, "\nglobal header:\n"); + fprintf (stderr, "\tmoh_magic = 0x%.8lx\n", hdr_ptr->moh_magic); + fprintf (stderr, "\tmoh_major_version = %d\n", (int)hdr_ptr->moh_major_version); + fprintf (stderr, "\tmoh_minor_version = %d\n", (int)hdr_ptr->moh_minor_version); + fprintf (stderr, "\tmoh_header_version = %d\n", (int)hdr_ptr->moh_header_version); + fprintf (stderr, "\tmoh_max_page_size = %d\n", (int)hdr_ptr->moh_max_page_size); + fprintf (stderr, "\tmoh_byte_order = %d\n", (int)hdr_ptr->moh_byte_order); + fprintf (stderr, "\tmoh_data_rep_id = %d\n", (int)hdr_ptr->moh_data_rep_id); + fprintf (stderr, "\tmoh_cpu_type = %d\n", (int)hdr_ptr->moh_cpu_type); + fprintf (stderr, "\tmoh_cpu_subtype = %d\n", (int)hdr_ptr->moh_cpu_subtype); + fprintf (stderr, "\tmoh_vendor_type = %d\n", (int)hdr_ptr->moh_vendor_type); + fprintf (stderr, "\tmoh_load_map_cmd_off = %d\n", (int)hdr_ptr->moh_load_map_cmd_off); + fprintf (stderr, "\tmoh_first_cmd_off = %d\n", (int)hdr_ptr->moh_first_cmd_off); + fprintf (stderr, "\tmoh_sizeofcmds = %d\n", (int)hdr_ptr->moh_sizeofcmds); + fprintf (stderr, "\tmon_n_load_cmds = %d\n", (int)hdr_ptr->moh_n_load_cmds); + fprintf (stderr, "\tmoh_flags = 0x%.8lx", (long)hdr_ptr->moh_flags); + + if (hdr_ptr->moh_flags & MOH_RELOCATABLE_F) + fprintf (stderr, ", relocatable"); + + if (hdr_ptr->moh_flags & MOH_LINKABLE_F) + fprintf (stderr, ", linkable"); + + if (hdr_ptr->moh_flags & MOH_EXECABLE_F) + fprintf (stderr, ", execable"); + + if (hdr_ptr->moh_flags & MOH_EXECUTABLE_F) + fprintf (stderr, ", executable"); + + if (hdr_ptr->moh_flags & MOH_UNRESOLVED_F) + fprintf (stderr, ", unresolved"); + + fprintf (stderr, "\n\n"); + return; +} + + +/* Print a short summary of a load command. */ + +static void +print_load_command (load_hdr, offset, number) + load_union_t *load_hdr; + size_t offset; + int number; +{ + mo_long_t type = load_hdr->hdr.ldci_cmd_type; + char *type_str = (char *)0; + + switch (type) + { + case LDC_UNDEFINED: type_str = "UNDEFINED"; break; + case LDC_CMD_MAP: type_str = "CMD_MAP"; break; + case LDC_INTERPRETER: type_str = "INTERPRETER"; break; + case LDC_STRINGS: type_str = "STRINGS"; break; + case LDC_REGION: type_str = "REGION"; break; + case LDC_RELOC: type_str = "RELOC"; break; + case LDC_PACKAGE: type_str = "PACKAGE"; break; + case LDC_SYMBOLS: type_str = "SYMBOLS"; break; + case LDC_ENTRY: type_str = "ENTRY"; break; + case LDC_FUNC_TABLE: type_str = "FUNC_TABLE"; break; + case LDC_GEN_INFO: type_str = "GEN_INFO"; break; + } + + fprintf (stderr, + "cmd %2d, sz: 0x%.2lx, coff: 0x%.3lx, doff: 0x%.6lx, dlen: 0x%.6lx", + number, + (long) load_hdr->hdr.ldci_cmd_size, + (long) offset, + (long) load_hdr->hdr.ldci_section_off, + (long) load_hdr->hdr.ldci_section_len); + + if (type_str == (char *)0) + fprintf (stderr, ", ty: unknown (%ld)\n", (long) type); + + else if (type != LDC_REGION) + fprintf (stderr, ", ty: %s\n", type_str); + + else + { + char *region = ""; + switch (load_hdr->region.regc_usage_type) + { + case REG_TEXT_T: region = ", .text"; break; + case REG_DATA_T: region = ", .data"; break; + case REG_BSS_T: region = ", .bss"; break; + case REG_GLUE_T: region = ", .glue"; break; +#if defined (REG_RDATA_T) && defined (REG_SDATA_T) && defined (REG_SBSS_T) /*mips*/ + case REG_RDATA_T: region = ", .rdata"; break; + case REG_SDATA_T: region = ", .sdata"; break; + case REG_SBSS_T: region = ", .sbss"; break; +#endif + } + + fprintf (stderr, ", ty: %s, vaddr: 0x%.8lx, vlen: 0x%.6lx%s\n", + type_str, + (long) load_hdr->region.regc_vm_addr, + (long) load_hdr->region.regc_vm_size, + region); + } + + return; +} + + +/* Fatal error when {en,de}code_mach_o_header fails. */ + +static void +bad_header (status) + int status; +{ + char *msg = (char *)0; + + switch (status) + { + case MO_ERROR_BAD_MAGIC: msg = "bad magic number"; break; + case MO_ERROR_BAD_HDR_VERS: msg = "bad header version"; break; + case MO_ERROR_BAD_RAW_HDR_VERS: msg = "bad raw header version"; break; + case MO_ERROR_BUF2SML: msg = "raw header buffer too small"; break; + case MO_ERROR_OLD_RAW_HDR_FILE: msg = "old raw header file"; break; + case MO_ERROR_UNSUPPORTED_VERS: msg = "unsupported version"; break; + } + + if (msg == (char *)0) + fatal ("unknown {de,en}code_mach_o_hdr return value %d", status); + else + fatal ("%s", msg); +} + + +/* Read a file into a memory buffer. */ + +static struct file_info * +read_file (name, fd, rw) + char *name; /* filename */ + int fd; /* file descriptor */ + int rw; /* read/write */ +{ + struct stat stat_pkt; + struct file_info *p = (struct file_info *) xcalloc (sizeof (struct file_info), 1); +#ifdef USE_MMAP + static int page_size; +#endif + + if (fstat (fd, &stat_pkt) < 0) + fatal_perror ("fstat %s", name); + + p->name = name; + p->size = stat_pkt.st_size; + p->rounded_size = stat_pkt.st_size; + p->fd = fd; + p->rw = rw; + +#ifdef USE_MMAP + if (debug) + fprintf (stderr, "mmap %s, %s\n", name, (rw) ? "read/write" : "read-only"); + + if (page_size == 0) + page_size = sysconf (_SC_PAGE_SIZE); + + p->rounded_size = ((p->size + page_size - 1) / page_size) * page_size; + p->start = mmap ((caddr_t)0, + (rw) ? p->rounded_size : p->size, + (rw) ? (PROT_READ | PROT_WRITE) : PROT_READ, + MAP_FILE | MAP_VARIABLE | MAP_SHARED, + fd, + 0L); + + if (p->start != (char *)0 && p->start != (char *)-1) + p->use_mmap = 1; + + else +#endif /* USE_MMAP */ + { + long len; + + if (debug) + fprintf (stderr, "read %s\n", name); + + p->use_mmap = 0; + p->start = xmalloc (p->size); + if (lseek (fd, 0L, SEEK_SET) < 0) + fatal_perror ("lseek to 0 on %s", name); + + len = read (fd, p->start, p->size); + if (len < 0) + fatal_perror ("read %s", name); + + if (len != p->size) + fatal ("read %ld bytes, expected %ld, from %s", len, p->size, name); + } + + return p; +} + + +/* Do anything necessary to write a file back from memory. */ + +static void +end_file (ptr) + struct file_info *ptr; /* file information block */ +{ +#ifdef USE_MMAP + if (ptr->use_mmap) + { + if (ptr->rw) + { + if (debug) + fprintf (stderr, "msync %s\n", ptr->name); + + if (msync (ptr->start, ptr->rounded_size, MS_ASYNC)) + fatal_perror ("msync %s", ptr->name); + } + + if (debug) + fprintf (stderr, "munmap %s\n", ptr->name); + + if (munmap (ptr->start, ptr->size)) + fatal_perror ("munmap %s", ptr->name); + } + else +#endif /* USE_MMAP */ + { + if (ptr->rw) + { + long len; + + if (debug) + fprintf (stderr, "write %s\n", ptr->name); + + if (lseek (ptr->fd, 0L, SEEK_SET) < 0) + fatal_perror ("lseek to 0 on %s", ptr->name); + + len = write (ptr->fd, ptr->start, ptr->size); + if (len < 0) + fatal_perror ("read %s", ptr->name); + + if (len != ptr->size) + fatal ("wrote %ld bytes, expected %ld, to %s", len, ptr->size, ptr->name); + } + + free ((generic *)ptr->start); + } + + free ((generic *)ptr); +} + +#endif /* OBJECT_FORMAT_ROSE */ diff --git a/gcc/config/vax/vms.h b/gcc/config/vax/vms.h new file mode 100644 index 00000000000..7d9584ab3ac --- /dev/null +++ b/gcc/config/vax/vms.h @@ -0,0 +1,249 @@ +/* Output variables, constants and external declarations, for GNU compiler. + Copyright (C) 1988 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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 2, or (at your option) +any later version. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* This enables certain macros in vax.h, which will make an indirect + reference to an external symbol an invalid address. This needs to be + defined before we include vax.h, since it determines which macros + are used for GO_IF_*. */ + +#define NO_EXTERNAL_INDIRECT_ADDRESS + +#include "vax.h" + +#undef LIB_SPEC +#undef CPP_PREDEFINES +#undef TARGET_VERSION +#undef TARGET_DEFAULT +#undef CALL_USED_REGISTERS +#undef MAYBE_VMS_FUNCTION_PROLOGUE + +/* Predefine this in CPP because VMS limits the size of command options + and GNU CPP is not used on VMS except with GNU C. */ +#define CPP_PREDEFINES "-Dvax -Dvms -DVMS -D__GNU__ -D__GNUC__" + +/* Strictly speaking, VMS does not use DBX at all, but the interpreter built + into gas only speaks straight DBX. */ + +#define DEFAULT_GDB_EXTENSIONS 0 + +/* By default, allow $ to be part of an identifier. */ +#define DOLLARS_IN_IDENTIFIERS 2 + +#define TARGET_DEFAULT 1 +#define TARGET_VERSION fprintf (stderr, " (vax vms)"); + +#define CALL_USED_REGISTERS {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} + +#define __MAIN_NAME " main (" +/* + * The MAYBE_VMS_FUNCTION_PROLOGUE macro works for both gcc and g++. It + * first checks to see if the current routine is "main", which will only + * happen for GCC, and add the jsb if it is. If is not the case then try and + * see if __MAIN_NAME is part of current_function_name, which will only happen + * if we are running g++, and add the jsb if it is. In gcc there should never + * be a space in the function name, and in g++ there is always a "(" in the + * function name, thus there should never be any confusion. + */ +#define MAYBE_VMS_FUNCTION_PROLOGUE(FILE) \ +{ extern char *current_function_name; \ + if (!strcmp ("main", current_function_name)) \ + fprintf(FILE, "\tjsb _c$main_args\n"); \ + else { \ + char *p = current_function_name; \ + while (*p != '\0') \ + if (*p == *__MAIN_NAME) \ + if (strncmp(p, __MAIN_NAME, (sizeof __MAIN_NAME)-1) == 0) {\ + fprintf(FILE, "\tjsb _c$main_args\n");\ + break; \ + } else \ + p++; \ + else \ + p++; \ + }; \ +} + +/* This macro definition sets up a default value for `main' to return. */ +#define DEFAULT_MAIN_RETURN c_expand_return (integer_one_node) + +/* This makes use of a hook in varasm.c to mark all external variables + for us. We use this to make sure that external variables are correctly + addressed. Under VMS there is some brain damage in the linker that requires + us to do this. */ + +#define ENCODE_SECTION_INFO(decl) \ + if (TREE_EXTERNAL (decl) && TREE_PUBLIC (decl)) \ + SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1; + +/* Under VMS we write the actual size of the storage to be allocated even + though the symbol is external. Although it is possible to give external + symbols a size of 0 (as unix does), the VMS linker does not make the + distinction between a variable definition and an external reference of a + variable, and thus the linker will not complain about a missing definition. + If we followed the unix example of giving external symbols a size of + zero, you tried to link a program where a given variable was externally + defined but none of the object modules contained a non-extern definition, + the linker would allocate 0 bytes for the variable, and any attempt to + use that variable would use the storage allocated to some other variable. + + We must also select either const_section or data_section: this will indicate + whether or not the variable will get the readonly bit set. Since the + VMS linker does not distinguish between a variable's definition and an + external reference, all usages of a given variable must have the readonly + bit set the same way, or the linker will get confused and give warning + messages. */ + +/* We used to round the size up to a multiple of 4, + but that causes linker errors sometimes when the variable was initialized + since the size of its definition was not likewise rounded up. */ + +#define ASM_OUTPUT_EXTERNAL(FILE,DECL,NAME) \ +{ if (DECL_INITIAL (DECL) == 0 && TREE_CODE (DECL) != FUNCTION_DECL) \ + { \ + if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl)) \ + const_section (); \ + else \ + data_section (); \ + fputs (".comm ", (FILE)); \ + assemble_name ((FILE), (NAME)); \ + if (DECL_SIZE (DECL) == 0) \ + fprintf ((FILE), ",0\n"); \ + else \ + { \ + tree size_tree; \ + size_tree = size_binop (CEIL_DIV_EXPR, \ + DECL_SIZE (DECL), size_int (BITS_PER_UNIT)); \ + fprintf ((FILE), ",%d\n", TREE_INT_CST_LOW (size_tree)); \ + } \ + } \ +} + +/* Here we redefine ASM_OUTPUT_COMMON to select the data_section or the + const_section before writing the ".const" assembler directive. + If we were specifying a size of zero for external variables, we would + not have to select a section, since the assembler can assume that + when the size > 0, the storage is for a non-external, uninitialized + variable (for which a "const" declaration would be senseless), + and the assembler can make the storage read/write. + + Since the ".const" directive specifies the actual size of the storage used + for both external and non-external variables, the assembler cannot + make this assumption, and thus it has no way of deciding if storage should + be read/write or read-only. To resolve this, we give the assembler some + assistance, in the form of a ".const" or a ".data" directive. + + Under GCC 1.40, external variables were declared with a size of zero. + The GNU assembler, GAS, will recognize the "-2" switch when built for VMS; + when compiling programs with GCC 2.n this switch should be used or the + assembler will not give the read-only attribute to external constants. + Failure to use this switch will result in linker warning messages about + mismatched psect attributes. */ + +#undef ASM_OUTPUT_COMMON + +#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ +( ((TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl)) \ + ? (const_section (), 0) : (data_section (), 0)), \ + fputs (".comm ", (FILE)), \ + assemble_name ((FILE), (NAME)), \ + fprintf ((FILE), ",%u\n", (ROUNDED))) + +/* We define this to prevent the name mangler from putting dollar signs into + function names. This isn't really needed, but it has been here for + some time and removing it would cause the object files generated by the + compiler to be incompatible with the object files from a compiler that + had this defined. Since it does no harm, we leave it in. */ + +#define NO_DOLLAR_IN_LABEL + +/* Add a "const" section. This is viewed by the assember as being nearly + the same as the "data" section, with the only difference being that a + flag is set for variables declared while in the const section. This + flag is used to determine whether or not the read/write bit should be + set in the Psect definition. */ + +#define EXTRA_SECTIONS in_const + +#define EXTRA_SECTION_FUNCTIONS \ +void \ +const_section () \ +{ \ + if (in_section != in_const) { \ + fprintf(asm_out_file,".const\n"); \ + in_section = in_const; \ + } \ +} + +/* This macro contains the logic to decide which section a variable + should be stored in. Static constant variables go in the text_section, + non-const variables go in the data_section, and non-static const + variables go in the const_section. + + Since this macro is used in a number of places, we must also be able + to decide where to place string constants. */ + +#define SELECT_SECTION(T,RELOC) \ +{ \ + if (TREE_CODE (T) == VAR_DECL) \ + { \ + if (TREE_READONLY (T) && ! TREE_THIS_VOLATILE (T)) \ + { \ + if (TREE_PUBLIC (T)) \ + const_section (); \ + else \ + text_section (); \ + } \ + else \ + data_section (); \ + } \ + if (*tree_code_type[(int) TREE_CODE (T)] == 'c') \ + { \ + if ((TREE_CODE (T) == STRING_CST && flag_writable_strings)) \ + data_section (); \ + else \ + text_section (); \ + } \ +} + +/* This is used by a hook in varasm.c to write the assembler directives + that are needed to tell the startup code which constructors need to + be run. */ + +#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ +{ \ + fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_init_1\n"); \ + data_section(); \ + fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_init_1:\n\t.long\t"); \ + assemble_name ((FILE), (NAME)); \ + fputc ('\n', (FILE)); \ +} + +/* This is used by a hook in varasm.c to write the assembler directives + that are needed to tell the startup code which destructors need to + be run. */ + +#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ +{ \ + fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_clean_1\n"); \ + data_section(); \ + fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_clean_1:\n\t.long\t");\ + assemble_name ((FILE), (NAME)); \ + fputc ('\n', (FILE)); \ +} + +