/* Darwin support needed only by C/C++ frontends. Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc. Contributed by Apple Computer Inc. This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "cpplib.h" #include "tree.h" #include "c-pragma.h" #include "c-tree.h" #include "c-incpath.h" #include "toplev.h" #include "tm_p.h" #include "cppdefault.h" #include "prefix.h" /* Pragmas. */ #define BAD(msgid) do { warning (msgid); return; } while (0) /* APPLE LOCAL Macintosh alignment 2002-1-22 --ff */ #define BAD2(msgid, arg) do { warning (msgid, arg); return; } while (0) static bool using_frameworks = false; /* APPLE LOCAL CALL_ON_LOAD/CALL_ON_UNLOAD pragmas 20020202 --turly */ static void directive_with_named_function (const char *, void (*sec_f)(void)); /* Maintain a small stack of alignments. This is similar to pragma pack's stack, but simpler. */ /* APPLE LOCAL begin Macintosh alignment 2001-12-17 --ff */ static void push_field_alignment (int, int, int); /* APPLE LOCAL end Macintosh alignment 2001-12-17 --ff */ static void pop_field_alignment (void); static const char *find_subframework_file (const char *, const char *); static void add_system_framework_path (char *); static const char *find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp); /* APPLE LOCAL begin Macintosh alignment 2002-1-22 --ff */ /* There are four alignment modes supported on the Apple Macintosh platform: power, mac68k, natural, and packed. These modes are identified as follows: if maximum_field_alignment != 0 mode = packed else if TARGET_ALIGN_NATURAL mode = natural else if TARGET_ALIGN_MAC68K mode else mode = power These modes are saved on the alignment stack by saving the values of maximum_field_alignment, TARGET_ALIGN_MAC68K, and TARGET_ALIGN_NATURAL. */ typedef struct align_stack { int alignment; unsigned long mac68k; unsigned long natural; struct align_stack * prev; } align_stack; /* APPLE LOCAL end Macintosh alignment 2002-1-22 --ff */ static struct align_stack * field_align_stack = NULL; /* APPLE LOCAL begin Macintosh alignment 2001-12-17 --ff */ static void push_field_alignment (int bit_alignment, int mac68k_alignment, int natural_alignment) { align_stack *entry = (align_stack *) xmalloc (sizeof (align_stack)); entry->alignment = maximum_field_alignment; entry->mac68k = TARGET_ALIGN_MAC68K; entry->natural = TARGET_ALIGN_NATURAL; entry->prev = field_align_stack; field_align_stack = entry; maximum_field_alignment = bit_alignment; if (mac68k_alignment) rs6000_alignment_flags |= MASK_ALIGN_MAC68K; else rs6000_alignment_flags &= ~MASK_ALIGN_MAC68K; if (natural_alignment) rs6000_alignment_flags |= MASK_ALIGN_NATURAL; else rs6000_alignment_flags &= ~MASK_ALIGN_NATURAL; } /* APPLE LOCAL end Macintosh alignment 2001-12-17 --ff */ static void pop_field_alignment (void) { if (field_align_stack) { align_stack *entry = field_align_stack; maximum_field_alignment = entry->alignment; /* APPLE LOCAL begin Macintosh alignment 2001-12-17 --ff */ if (entry->mac68k) rs6000_alignment_flags |= MASK_ALIGN_MAC68K; else rs6000_alignment_flags &= ~MASK_ALIGN_MAC68K; if (entry->natural) rs6000_alignment_flags |= MASK_ALIGN_NATURAL; else rs6000_alignment_flags &= ~MASK_ALIGN_NATURAL; /* APPLE LOCAL end Macintosh alignment 2001-12-17 --ff */ field_align_stack = entry->prev; free (entry); } else error ("too many #pragma options align=reset"); } /* Handlers for Darwin-specific pragmas. */ void darwin_pragma_ignore (cpp_reader *pfile ATTRIBUTE_UNUSED) { /* Do nothing. */ } /* #pragma options align={mac68k|power|reset} */ void darwin_pragma_options (cpp_reader *pfile ATTRIBUTE_UNUSED) { const char *arg; tree t, x; if (c_lex (&t) != CPP_NAME) BAD ("malformed '#pragma options', ignoring"); arg = IDENTIFIER_POINTER (t); if (strcmp (arg, "align")) BAD ("malformed '#pragma options', ignoring"); if (c_lex (&t) != CPP_EQ) BAD ("malformed '#pragma options', ignoring"); if (c_lex (&t) != CPP_NAME) BAD ("malformed '#pragma options', ignoring"); if (c_lex (&x) != CPP_EOF) warning ("junk at end of '#pragma options'"); arg = IDENTIFIER_POINTER (t); /* APPLE LOCAL begin Macintosh alignment 2002-1-22 --ff */ if (!strcmp (arg, "mac68k")) push_field_alignment (0, 1, 0); else if (!strcmp (arg, "native")) /* equivalent to power on PowerPC */ push_field_alignment (0, 0, 0); else if (!strcmp (arg, "natural")) push_field_alignment (0, 0, 1); else if (!strcmp (arg, "packed")) push_field_alignment (8, 0, 0); else if (!strcmp (arg, "power")) push_field_alignment (0, 0, 0); else if (!strcmp (arg, "reset")) pop_field_alignment (); else warning ("malformed '#pragma options align={mac68k|power|natural|reset}', ignoring"); /* APPLE LOCAL end Macintosh alignment 2002-1-22 --ff */ } /* APPLE LOCAL begin Macintosh alignment 2002-1-22 --ff */ /* #pragma pack () #pragma pack (N) We have a problem handling the semantics of these directives since, to play well with the Macintosh alignment directives, we want the usual pack(N) form to do a push of the previous alignment state. Do we want pack() to do another push or a pop? */ void darwin_pragma_pack (cpp_reader *pfile ATTRIBUTE_UNUSED) { tree x; int align = -1; enum cpp_ttype token; enum { set, push, pop } action; if (c_lex (&x) != CPP_OPEN_PAREN) BAD ("missing '(' after '#pragma pack' - ignored"); token = c_lex (&x); if (token == CPP_CLOSE_PAREN) { action = pop; /* or "set" ??? */ align = 0; } else if (token == CPP_NUMBER) { align = TREE_INT_CST_LOW (x); action = push; if (c_lex (&x) != CPP_CLOSE_PAREN) BAD ("malformed '#pragma pack' - ignored"); } else BAD ("malformed '#pragma pack' - ignored"); if (c_lex (&x) != CPP_EOF) warning ("junk at end of '#pragma pack'"); switch (align) { case 0: case 1: case 2: case 4: case 8: case 16: align *= BITS_PER_UNIT; break; default: BAD2 ("alignment must be a small power of two, not %d", align); } switch (action) { case pop: pop_field_alignment (); break; case push: push_field_alignment (align, 0, 0); break; case set: break; } } /* APPLE LOCAL end Macintosh alignment 2002-1-22 --ff */ /* #pragma unused ([var {, var}*]) */ void darwin_pragma_unused (cpp_reader *pfile ATTRIBUTE_UNUSED) { tree decl, x; int tok; if (c_lex (&x) != CPP_OPEN_PAREN) BAD ("missing '(' after '#pragma unused', ignoring"); while (1) { tok = c_lex (&decl); if (tok == CPP_NAME && decl) { tree local = lookup_name (decl); if (local && (TREE_CODE (local) == PARM_DECL || TREE_CODE (local) == VAR_DECL)) TREE_USED (local) = 1; tok = c_lex (&x); if (tok != CPP_COMMA) break; } } if (tok != CPP_CLOSE_PAREN) BAD ("missing ')' after '#pragma unused', ignoring"); if (c_lex (&x) != CPP_EOF) warning ("junk at end of '#pragma unused'"); } static struct { size_t len; const char *name; cpp_dir* dir; } *frameworks_in_use; static int num_frameworks = 0; static int max_frameworks = 0; /* Remember which frameworks have been seen, so that we can ensure that all uses of that framework come from the same framework. DIR is the place where the named framework NAME, which is of length LEN, was found. We copy the directory name from NAME, as it will be freed by others. */ static void add_framework (const char *name, size_t len, cpp_dir *dir) { char *dir_name; int i; for (i = 0; i < num_frameworks; ++i) { if (len == frameworks_in_use[i].len && strncmp (name, frameworks_in_use[i].name, len) == 0) { return; } } if (i >= max_frameworks) { max_frameworks = i*2; max_frameworks += i == 0; frameworks_in_use = xrealloc (frameworks_in_use, max_frameworks*sizeof(*frameworks_in_use)); } dir_name = xmalloc (len + 1); memcpy (dir_name, name, len); dir_name[len] = '\0'; frameworks_in_use[num_frameworks].name = dir_name; frameworks_in_use[num_frameworks].len = len; frameworks_in_use[num_frameworks].dir = dir; ++num_frameworks; } /* Recall if we have seen the named framework NAME, before, and where we saw it. NAME is LEN bytes long. The return value is the place where it was seen before. */ static struct cpp_dir* find_framework (const char *name, size_t len) { int i; for (i = 0; i < num_frameworks; ++i) { if (len == frameworks_in_use[i].len && strncmp (name, frameworks_in_use[i].name, len) == 0) { return frameworks_in_use[i].dir; } } return 0; } /* There are two directories in a framework that contain header files, Headers and PrivateHeaders. We search Headers first as it is more common to upgrade a header from PrivateHeaders to Headers and when that is done, the old one might hang around and be out of data, causing grief. */ struct framework_header {const char * dirName; int dirNameLen; }; static struct framework_header framework_header_dirs[] = { { "Headers", 7 }, { "PrivateHeaders", 14 }, { NULL, 0 } }; /* Returns a pointer to a malloced string that contains the real pathname to the file, given the base name and the name. */ static char * framework_construct_pathname (const char *fname, cpp_dir *dir) { char *buf; size_t fname_len, frname_len; cpp_dir *fast_dir; char *frname; struct stat st; int i; /* Framework names must have a / in them. */ buf = strchr (fname, '/'); if (buf) fname_len = buf - fname; else return 0; fast_dir = find_framework (fname, fname_len); /* Framework includes must all come from one framework. */ if (fast_dir && dir != fast_dir) return 0; frname = xmalloc (strlen (fname) + dir->len + 2 + strlen(".framework/") + strlen("PrivateHeaders")); strncpy (&frname[0], dir->name, dir->len); frname_len = dir->len; if (frname_len && frname[frname_len-1] != '/') frname[frname_len++] = '/'; strncpy (&frname[frname_len], fname, fname_len); frname_len += fname_len; strncpy (&frname[frname_len], ".framework/", strlen (".framework/")); frname_len += strlen (".framework/"); /* Append framework_header_dirs and header file name */ for (i = 0; framework_header_dirs[i].dirName; i++) { strncpy (&frname[frname_len], framework_header_dirs[i].dirName, framework_header_dirs[i].dirNameLen); strcpy (&frname[frname_len + framework_header_dirs[i].dirNameLen], &fname[fname_len]); if (stat (frname, &st) == 0) { if (fast_dir == 0) add_framework (fname, fname_len, dir); return frname; } } free (frname); return 0; } /* Search for FNAME in sub-frameworks. pname is the context that we wish to search in. Return the path the file was found at, otherwise return 0. */ static const char* find_subframework_file (const char *fname, const char *pname) { char *sfrname; const char *dot_framework = ".framework/"; char *bufptr; int sfrname_len, i, fname_len; struct cpp_dir *fast_dir; static struct cpp_dir subframe_dir; struct stat st; bufptr = strchr (fname, '/'); /* Subframework files must have / in the name. */ if (bufptr == 0) return 0; fname_len = bufptr - fname; fast_dir = find_framework (fname, fname_len); /* Sub framework header filename includes parent framework name and header name in the "CarbonCore/OSUtils.h" form. If it does not include slash it is not a sub framework include. */ bufptr = strstr (pname, dot_framework); /* If the parent header is not of any framework, then this header cannot be part of any subframework. */ if (!bufptr) return 0; /* Now translate. For example, +- bufptr fname = CarbonCore/OSUtils.h | pname = /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h into sfrname = /System/Library/Frameworks/Foundation.framework/Frameworks/CarbonCore.framework/Headers/OSUtils.h */ sfrname = (char *) xmalloc (strlen (pname) + strlen (fname) + 2 + strlen ("Frameworks/") + strlen (".framework/") + strlen ("PrivateHeaders")); bufptr += strlen (dot_framework); sfrname_len = bufptr - pname; strncpy (&sfrname[0], pname, sfrname_len); strncpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/")); sfrname_len += strlen("Frameworks/"); strncpy (&sfrname[sfrname_len], fname, fname_len); sfrname_len += fname_len; strncpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/")); sfrname_len += strlen (".framework/"); /* Append framework_header_dirs and header file name */ for (i = 0; framework_header_dirs[i].dirName; i++) { strncpy (&sfrname[sfrname_len], framework_header_dirs[i].dirName, framework_header_dirs[i].dirNameLen); strcpy (&sfrname[sfrname_len + framework_header_dirs[i].dirNameLen], &fname[fname_len]); if (stat (sfrname, &st) == 0) { if (fast_dir != &subframe_dir) { if (fast_dir) warning ("subframework include %s conflicts with framework include", fname); else add_framework (fname, fname_len, &subframe_dir); } return sfrname; } } free (sfrname); return 0; } /* Add PATH to the system includes. PATH must be malloc-ed and NUL-terminated. System framework paths are C++ aware. */ static void add_system_framework_path (char *path) { int cxx_aware = 1; cpp_dir *p; p = xmalloc (sizeof (cpp_dir)); p->next = NULL; p->name = path; p->sysp = 1 + !cxx_aware; p->construct = framework_construct_pathname; using_frameworks = 1; add_cpp_dir_path (p, SYSTEM); } /* Add PATH to the bracket includes. PATH must be malloc-ed and NUL-terminated. */ void add_framework_path (char *path) { cpp_dir *p; p = xmalloc (sizeof (cpp_dir)); p->next = NULL; p->name = path; p->sysp = 0; p->construct = framework_construct_pathname; using_frameworks = 1; add_cpp_dir_path (p, BRACKET); } static const char *framework_defaults [] = { "/System/Library/Frameworks", "/Library/Frameworks", }; /* Register the GNU objective-C runtime include path if STDINC. */ void darwin_register_objc_includes (const char *sysroot, const char *iprefix, int stdinc) { const char *fname; size_t len; /* We do not do anything if we do not want the standard includes. */ if (!stdinc) return; fname = GCC_INCLUDE_DIR "-gnu-runtime"; /* Register the GNU OBJC runtime include path if we are compiling OBJC with GNU-runtime. */ if (c_dialect_objc () && !flag_next_runtime) { char *str; /* See if our directory starts with the standard prefix. "Translate" them, i.e. replace /usr/local/lib/gcc... with IPREFIX and search them first. */ if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0 && !sysroot && !strncmp (fname, cpp_GCC_INCLUDE_DIR, len)) { str = concat (iprefix, fname + len, NULL); /* FIXME: wrap the headers for C++awareness. */ add_path (str, SYSTEM, /*c++aware=*/false, false); } /* Should this directory start with the sysroot? */ if (sysroot) str = concat (sysroot, fname, NULL); else str = update_path (fname, ""); add_path (str, SYSTEM, /*c++aware=*/false, false); } } /* Register all the system framework paths if STDINC is true and setup the missing_header callback for subframework searching if any frameworks had been registered. */ void darwin_register_frameworks (const char *sysroot ATTRIBUTE_UNUSED, const char *iprefix ATTRIBUTE_UNUSED, int stdinc) { if (stdinc) { size_t i; /* Setup default search path for frameworks. */ for (i=0; imissing_header = find_subframework_header; } /* Search for HEADER in context dependent way. The return value is the malloced name of a header to try and open, if any, or NULL otherwise. This is called after normal header lookup processing fails to find a header. We search each file in the include stack, using FUNC, starting from the most deeply nested include and finishing with the main input file. We stop searching when FUNC returns nonzero. */ static const char* find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp) { const char *fname = header; struct cpp_buffer *b; const char *n; for (b = cpp_get_buffer (pfile); b && cpp_get_file (b) && cpp_get_path (cpp_get_file (b)); b = cpp_get_prev (b)) { n = find_subframework_file (fname, cpp_get_path (cpp_get_file (b))); if (n) { /* Logically, the place where we found the subframework is the place where we found the Framework that contains the subframework. This is useful for tracking wether or not we are in a system header. */ *dirp = cpp_get_dir (cpp_get_file (b)); return n; } } return 0; } /* APPLE LOCAL begin CALL_ON_LOAD/CALL_ON_UNLOAD pragmas 20020202 --turly */ extern void mod_init_section (void), mod_term_section (void); /* Grab the function name from the pragma line and output it to the assembly output file with the parameter DIRECTIVE. Called by the pragma CALL_ON_LOAD and CALL_ON_UNLOAD handlers below. So: "#pragma CALL_ON_LOAD foo" will output ".mod_init_func _foo". */ static void directive_with_named_function (const char *pragma_name, void (*section_function) (void)) { tree decl; int tok; tok = c_lex (&decl); if (tok == CPP_NAME && decl) { extern FILE *asm_out_file; section_function (); fprintf (asm_out_file, "\t.long _%s\n", IDENTIFIER_POINTER (decl)); if (c_lex (&decl) != CPP_EOF) warning ("junk at end of #pragma %s \n", pragma_name); } else warning ("function name expected after #pragma %s\n", pragma_name); } void darwin_pragma_call_on_load (cpp_reader *pfile ATTRIBUTE_UNUSED) { warning("Pragma CALL_ON_LOAD is deprecated; use constructor attribute instead"); directive_with_named_function ("CALL_ON_LOAD", mod_init_section); } void darwin_pragma_call_on_unload (cpp_reader *pfile ATTRIBUTE_UNUSED) { warning("Pragma CALL_ON_UNLOAD is deprecated; use destructor attribute instead"); directive_with_named_function ("CALL_ON_UNLOAD", mod_term_section); } /* APPLE LOCAL end CALL_ON_LOAD/CALL_ON_UNLOAD pragmas 20020202 --turly */