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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/config/darwin.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/config/darwin.c | 2565 |
1 files changed, 2565 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/config/darwin.c b/gcc-4.2.1-5666.3/gcc/config/darwin.c new file mode 100644 index 000000000..77a53123d --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/config/darwin.c @@ -0,0 +1,2565 @@ +/* Functions for generic Darwin as target machine for GNU C compiler. + Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, + 2005 + 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, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "regs.h" +#include "hard-reg-set.h" +#include "real.h" +#include "insn-config.h" +#include "conditions.h" +#include "insn-flags.h" +#include "output.h" +#include "insn-attr.h" +#include "flags.h" +#include "tree.h" +#include "expr.h" +#include "reload.h" +#include "function.h" +#include "ggc.h" +#include "langhooks.h" +#include "target.h" +#include "tm_p.h" +#include "toplev.h" +#include "hashtab.h" +/* APPLE LOCAL begin constant cfstrings */ +#include "toplev.h" + +static tree darwin_build_constant_cfstring (tree); + +enum darwin_builtins +{ + DARWIN_BUILTIN_MIN = (int)END_BUILTINS, + + DARWIN_BUILTIN_CFSTRINGMAKECONSTANTSTRING, + DARWIN_BUILTIN_MAX +}; +/* APPLE LOCAL end constant cfstrings */ + +/* Darwin supports a feature called fix-and-continue, which is used + for rapid turn around debugging. When code is compiled with the + -mfix-and-continue flag, two changes are made to the generated code + that allow the system to do things that it would normally not be + able to do easily. These changes allow gdb to load in + recompilation of a translation unit that has been changed into a + running program and replace existing functions and methods of that + translation unit with versions of those functions and methods + from the newly compiled translation unit. The new functions access + the existing static symbols from the old translation unit, if the + symbol existed in the unit to be replaced, and from the new + translation unit, otherwise. + + The changes are to insert 5 nops at the beginning of all functions + and to use indirection to get at static symbols. The 5 nops + are required by consumers of the generated code. Currently, gdb + uses this to patch in a jump to the overriding function, this + allows all uses of the old name to forward to the replacement, + including existing function pointers and virtual methods. See + rs6000_emit_prologue for the code that handles the nop insertions. + + The added indirection allows gdb to redirect accesses to static + symbols from the newly loaded translation unit to the existing + symbol, if any. @code{static} symbols are special and are handled by + setting the second word in the .non_lazy_symbol_pointer data + structure to symbol. See indirect_data for the code that handles + the extra indirection, and machopic_output_indirection and its use + of MACHO_SYMBOL_STATIC for the code that handles @code{static} + symbol indirection. */ + +/* APPLE LOCAL begin pragma reverse_bitfields */ +/* Shouldn't there be a comment here? */ +int darwin_reverse_bitfields = 0; +/* APPLE LOCAL end pragma reverse_bitfields */ + +/* APPLE LOCAL begin axe stubs 5571540 */ +int darwin_stubs = false; +/* APPLE LOCAL end axe stubs 5571540 */ + +/* Section names. */ +section * darwin_sections[NUM_DARWIN_SECTIONS]; + +/* True if we're setting __attribute__ ((ms_struct)). */ +int darwin_ms_struct = false; + +/* A get_unnamed_section callback used to switch to an ObjC section. + DIRECTIVE is as for output_section_asm_op. */ + +static void +output_objc_section_asm_op (const void *directive) +{ + static bool been_here = false; + + if (! been_here) + { + static const enum darwin_section_enum tomark[] = + { + /* written, cold -> hot */ + objc_cat_cls_meth_section, + objc_cat_inst_meth_section, + objc_string_object_section, + objc_constant_string_object_section, + objc_selector_refs_section, + objc_selector_fixup_section, + objc_cls_refs_section, + objc_class_section, + objc_meta_class_section, + /* shared, hot -> cold */ + objc_cls_meth_section, + objc_inst_meth_section, + objc_protocol_section, + objc_class_names_section, + objc_meth_var_types_section, + objc_meth_var_names_section, + objc_category_section, + objc_class_vars_section, + objc_instance_vars_section, + objc_module_info_section, + /* APPLE LOCAL begin objc2 */ + objc_symbols_section, + objc_protocol_ext_section, + objc_class_ext_section, + objc_prop_list_section + /* APPLE LOCAL end objc2 */ + }; + /* APPLE LOCAL begin ObjC abi v2 - radar 4792158 */ + static const enum darwin_section_enum tomarkv2[] = + { + objc_v2_message_refs_section, + /* APPLE LOCAL begin radar 6255595 */ + objc_v2_classdefs_section, + objc_v2_metadata_section, + /* APPLE LOCAL end radar 6255595 */ + objc_v2_classrefs_section, + objc_v2_classlist_section, + objc_v2_categorylist_section, + objc_v2_selector_refs_section, + objc_v2_nonlazy_class_section, + objc_v2_nonlazy_category_section, + objc_v2_protocollist_section, + objc_v2_protocolrefs_section, + objc_v2_super_classrefs_section, + objc_v2_image_info_section, + objc_v2_constant_string_object_section + } ; + /* APPLE LOCAL end ObjC abi v2 - radar 4792158 */ + size_t i; + + been_here = true; + /* APPLE LOCAL begin radar 4792158 */ + /* APPLE LOCAL begin radar 4585769 - Objective-C 1.0 extensions */ + if (flag_objc_abi == 1) + for (i = 0; i < ARRAY_SIZE (tomark); i++) + switch_to_section (darwin_sections[tomark[i]]); + /* APPLE LOCAL end radar 4585769 - Objective-C 1.0 extensions */ \ + else if (flag_objc_abi == 2) + for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) + switch_to_section (darwin_sections[tomarkv2[i]]); + /* APPLE LOCAL end radar 4792158 */ + } + output_section_asm_op (directive); +} + +/* Implement TARGET_ASM_INIT_SECTIONS. */ + +void +darwin_init_sections (void) +{ +#define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ + darwin_sections[NAME] = \ + get_unnamed_section (FLAGS, (OBJC \ + ? output_objc_section_asm_op \ + : output_section_asm_op), \ + "\t" DIRECTIVE); +#include "config/darwin-sections.def" +#undef DEF_SECTION + + readonly_data_section = darwin_sections[const_section]; + exception_section = darwin_sections[darwin_exception_section]; + eh_frame_section = darwin_sections[darwin_eh_frame_section]; +} + +int +name_needs_quotes (const char *name) +{ + int c; + while ((c = *name++) != '\0') + if (! ISIDNUM (c) && c != '.' && c != '$') + return 1; + return 0; +} + +/* Return true if SYM_REF can be used without an indirection. */ +/* APPLE LOCAL dynamic-no-pic */ +int +machopic_symbol_defined_p (rtx sym_ref) +{ + if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) + return true; + + /* If a symbol references local and is not an extern to this + file, then the symbol might be able to declared as defined. */ + if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) + { + /* If the symbol references a variable and the variable is a + common symbol, then this symbol is not defined. */ + if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) + { + tree decl = SYMBOL_REF_DECL (sym_ref); + if (!decl) + return true; + if (DECL_COMMON (decl)) + return false; + } + /* APPLE LOCAL begin 6077274 */ + /* Weak functions should always be indirected. */ + else if (SYMBOL_REF_FLAGS (sym_ref) & SYMBOL_FLAG_FUNCTION) + { + tree decl = SYMBOL_REF_DECL (sym_ref); + if (decl && DECL_WEAK (decl)) + return false; + } + /* APPLE LOCAL end 6077274 */ + return true; + } + return false; +} + +/* This module assumes that (const (symbol_ref "foo")) is a legal pic + reference, which will not be changed. */ + +enum machopic_addr_class +machopic_classify_symbol (rtx sym_ref) +{ + int flags; + bool function_p; + + flags = SYMBOL_REF_FLAGS (sym_ref); + function_p = SYMBOL_REF_FUNCTION_P (sym_ref); + if (machopic_symbol_defined_p (sym_ref)) + return (function_p + ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); + else + return (function_p + ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); +} + +#ifndef TARGET_FIX_AND_CONTINUE +#define TARGET_FIX_AND_CONTINUE 0 +#endif + +/* Indicate when fix-and-continue style code generation is being used + and when a reference to data should be indirected so that it can be + rebound in a new translation unit to reference the original instance + of that data. Symbol names that are for code generation local to + the translation unit are bound to the new translation unit; + currently this means symbols that begin with L or _OBJC_; + otherwise, we indicate that an indirect reference should be made to + permit the runtime to rebind new instances of the translation unit + to the original instance of the data. */ + +/* APPLE LOCAL fix-and-continue 6227434 */ +int +indirect_data (rtx sym_ref) +{ + int lprefix; + const char *name; + + /* If we aren't generating fix-and-continue code, don't do anything special. */ + if (TARGET_FIX_AND_CONTINUE == 0) + return 0; + + /* Otherwise, all symbol except symbols that begin with L or _OBJC_ + are indirected. Symbols that begin with L and _OBJC_ are always + bound to the current translation unit as they are used for + generated local data of the translation unit. */ + + name = XSTR (sym_ref, 0); + + lprefix = (((name[0] == '*' || name[0] == '&') + /* APPLE LOCAL begin fix-and-continue 6227434 */ + && (name[1] == 'L' + || (name[1] == '"' && name[2] == 'L') + /* Don't indirect writable strings. */ + || (name[1] == 'l' && name[2] == 'C'))) + || (strncmp (name, "_OBJC_", 6) == 0) + || objc_anonymous_local_objc_name (name)); + /* APPLE LOCAL end fix-and-continue 6227434 */ + + return ! lprefix; +} + + +/* APPLE LOCAL ARM pic support */ +int +machopic_data_defined_p (rtx sym_ref) +{ + if (indirect_data (sym_ref)) + return 0; + + switch (machopic_classify_symbol (sym_ref)) + { + case MACHOPIC_DEFINED_DATA: + case MACHOPIC_DEFINED_FUNCTION: + return 1; + default: + return 0; + } +} + +void +machopic_define_symbol (rtx mem) +{ + rtx sym_ref; + + gcc_assert (GET_CODE (mem) == MEM); + sym_ref = XEXP (mem, 0); + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; +} + +static GTY(()) char * function_base; + +const char * +machopic_function_base_name (void) +{ + /* if dynamic-no-pic is on, we should not get here */ + gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); + + if (function_base == NULL) + function_base = + (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); + + current_function_uses_pic_offset_table = 1; + + return function_base; +} + +/* Return a SYMBOL_REF for the PIC function base. */ + +rtx +machopic_function_base_sym (void) +{ + rtx sym_ref; + + sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); + SYMBOL_REF_FLAGS (sym_ref) + |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); + return sym_ref; +} + +/* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending + on whether pic_base is NULL or not. */ +static inline rtx +gen_pic_offset (rtx orig, rtx pic_base) +{ + if (!pic_base) + return orig; + else + return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); +} + +static GTY(()) const char * function_base_func_name; +static GTY(()) int current_pic_label_num; + +void +machopic_output_function_base_name (FILE *file) +{ + const char *current_name; + + /* If dynamic-no-pic is on, we should not get here. */ + gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); + current_name = + IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); + if (function_base_func_name != current_name) + { + ++current_pic_label_num; + function_base_func_name = current_name; + } + fprintf (file, "\"L%011d$pb\"", current_pic_label_num); +} + +/* The suffix attached to non-lazy pointer symbols. */ +#define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" +/* The suffix attached to stub symbols. */ +#define STUB_SUFFIX "$stub" + +typedef struct machopic_indirection GTY (()) +{ + /* The SYMBOL_REF for the entity referenced. */ + rtx symbol; + /* The name of the stub or non-lazy pointer. */ + const char * ptr_name; + /* True iff this entry is for a stub (as opposed to a non-lazy + pointer). */ + bool stub_p; + /* True iff this stub or pointer pointer has been referenced. */ + bool used; + /* APPLE LOCAL begin ARM 5440570 */ + /* True iff this stub or pointer pointer has been outputted. */ + bool emitted; + /* APPLE LOCAL end ARM 5440570 */ +} machopic_indirection; + +/* A table mapping stub names and non-lazy pointer names to + SYMBOL_REFs for the stubbed-to and pointed-to entities. */ + +static GTY ((param_is (struct machopic_indirection))) htab_t + machopic_indirections; + +/* APPLE LOCAL begin 5440570 */ +/* Used to identify that usage information has changed while + outputting the stubs. */ +static GTY (()) bool indirection_uses_changed; +/* APPLE LOCAL end 5440570 */ + +/* Return a hash value for a SLOT in the indirections hash table. */ + +static hashval_t +machopic_indirection_hash (const void *slot) +{ + const machopic_indirection *p = (const machopic_indirection *) slot; + return htab_hash_string (p->ptr_name); +} + +/* Returns true if the KEY is the same as that associated with + SLOT. */ + +static int +machopic_indirection_eq (const void *slot, const void *key) +{ + return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; +} + +/* Return the name of the non-lazy pointer (if STUB_P is false) or + stub (if STUB_B is true) corresponding to the given name. */ + +const char * +machopic_indirection_name (rtx sym_ref, bool stub_p) +{ + char *buffer; + const char *name = XSTR (sym_ref, 0); + size_t namelen = strlen (name); + machopic_indirection *p; + void ** slot; + bool saw_star = false; + bool needs_quotes; + const char *suffix; + const char *prefix = user_label_prefix; + const char *quote = ""; + tree id; + + id = maybe_get_identifier (name); + if (id) + { + tree id_orig = id; + + while (IDENTIFIER_TRANSPARENT_ALIAS (id)) + id = TREE_CHAIN (id); + if (id != id_orig) + { + name = IDENTIFIER_POINTER (id); + namelen = strlen (name); + } + } + + if (name[0] == '*') + { + saw_star = true; + prefix = ""; + ++name; + --namelen; + } + + needs_quotes = name_needs_quotes (name); + if (needs_quotes) + { + quote = "\""; + } + + if (stub_p) + suffix = STUB_SUFFIX; + else + suffix = NON_LAZY_POINTER_SUFFIX; + + buffer = alloca (strlen ("&L") + + strlen (prefix) + + namelen + + strlen (suffix) + + 2 * strlen (quote) + + 1 /* '\0' */); + + /* Construct the name of the non-lazy pointer or stub. */ + sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); + + if (!machopic_indirections) + machopic_indirections = htab_create_ggc (37, + machopic_indirection_hash, + machopic_indirection_eq, + /*htab_del=*/NULL); + + slot = htab_find_slot_with_hash (machopic_indirections, buffer, + htab_hash_string (buffer), INSERT); + if (*slot) + { + p = (machopic_indirection *) *slot; + } + else + { + p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); + p->symbol = sym_ref; + p->ptr_name = xstrdup (buffer); + p->stub_p = stub_p; + p->used = false; + /* APPLE LOCAL ARM 5440570 */ + p->emitted = false; + *slot = p; + } + + return p->ptr_name; +} + +/* Return the name of the stub for the mcount function. */ + +const char* +machopic_mcount_stub_name (void) +{ + rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); + return machopic_indirection_name (symbol, /*stub_p=*/true); +} + +/* APPLE LOCAL begin ARM pic support */ +/* Determine whether the specified symbol is in the indirections table. */ +int +machopic_lookup_stub_or_non_lazy_ptr (const char *name) +{ + machopic_indirection *p; + + if (! machopic_indirections) + return 0; + + p = (machopic_indirection *) + htab_find_with_hash (machopic_indirections, name, + htab_hash_string (name)); + if (p) + return 1; + else + return 0; +} +/* APPLE LOCAL end ARM pic support */ + +/* If NAME is the name of a stub or a non-lazy pointer , mark the stub + or non-lazy pointer as used -- and mark the object to which the + pointer/stub refers as used as well, since the pointer/stub will + emit a reference to it. */ + +void +machopic_validate_stub_or_non_lazy_ptr (const char *name) +{ + machopic_indirection *p; + + p = ((machopic_indirection *) + (htab_find_with_hash (machopic_indirections, name, + htab_hash_string (name)))); + if (p && ! p->used) + { + const char *real_name; + tree id; + + p->used = true; + /* APPLE LOCAL ARM 5440570 */ + indirection_uses_changed = true; + + /* Do what output_addr_const will do when we actually call it. */ + if (SYMBOL_REF_DECL (p->symbol)) + mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); + + real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); + + id = maybe_get_identifier (real_name); + if (id) + mark_referenced (id); + } +} + +/* Transform ORIG, which may be any data source, to the corresponding + source using indirections. */ + +rtx +machopic_indirect_data_reference (rtx orig, rtx reg) +{ + rtx ptr_ref = orig; + + if (! MACHOPIC_INDIRECT) + return orig; + + /* APPLE LOCAL begin dynamic-no-pic */ + switch (GET_CODE (orig)) + { + case SYMBOL_REF: + { + int defined = machopic_data_defined_p (orig); + + if (defined && MACHO_DYNAMIC_NO_PIC_P) + { +#if defined (TARGET_TOC) + /* Create a new register for CSE opportunities. */ + rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); + emit_insn (gen_macho_high (hi_reg, orig)); + emit_insn (gen_macho_low (reg, hi_reg, orig)); +#else +#if defined (TARGET_386) + return orig; +#else /* defined (TARGET_386) */ + /* some other cpu -- writeme! */ + gcc_unreachable (); +#endif /* defined (TARGET_386) */ +#endif + return reg; + } + else if (defined) + { +#if defined (TARGET_TOC) || defined (HAVE_lo_sum) + rtx pic_base = machopic_function_base_sym (); + rtx offset = gen_pic_offset (orig, pic_base); +#endif + +#if defined (TARGET_TOC) /* i.e., PowerPC */ + rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); + + gcc_assert (reg); + + emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, + gen_rtx_PLUS (Pmode, pic_offset_table_rtx, + gen_rtx_HIGH (Pmode, offset)))); + emit_insn (gen_rtx_SET (Pmode, reg, + gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); + + orig = reg; +#else +#if defined (HAVE_lo_sum) + gcc_assert (reg); + + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_HIGH (Pmode, offset))); + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_LO_SUM (Pmode, reg, offset))); + emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); + + orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); +#endif +#endif + return orig; + } + + ptr_ref = (gen_rtx_SYMBOL_REF + (Pmode, + machopic_indirection_name (orig, /*stub_p=*/false))); + + SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); + + ptr_ref = gen_const_mem (Pmode, ptr_ref); + machopic_define_symbol (ptr_ref); + +#ifdef TARGET_386 + if (reg && MACHO_DYNAMIC_NO_PIC_P) + { + emit_insn (gen_rtx_SET (Pmode, reg, ptr_ref)); + ptr_ref = reg; + } +#endif /* TARGET_386 */ + + return ptr_ref; + } + break; + + case CONST: + { + /* If "(const (plus ...", walk the PLUS and return that result. + PLUS processing (below) will restore the "(const ..." if + appropriate. */ + if (GET_CODE (XEXP (orig, 0)) == PLUS) + return machopic_indirect_data_reference (XEXP (orig, 0), reg); + else + return orig; + } + break; + + case MEM: + { + XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); + return ptr_ref; + } + break; + + case PLUS: + { + rtx base, result; + + /* When the target is i386, this code prevents crashes due to the + compiler's ignorance on how to move the PIC base register to + other registers. (The reload phase sometimes introduces such + insns.) */ + if (GET_CODE (XEXP (orig, 0)) == REG + && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM +#ifdef TARGET_386 + /* Prevent the same register from being erroneously used + as both the base and index registers. */ + && GET_CODE (XEXP (orig, 1)) == CONST +#endif + && reg) + { + emit_move_insn (reg, XEXP (orig, 0)); + XEXP (ptr_ref, 0) = reg; + return ptr_ref; + } + + /* Legitimize both operands of the PLUS. */ + base = machopic_indirect_data_reference (XEXP (orig, 0), reg); + orig = machopic_indirect_data_reference (XEXP (orig, 1), + (base == reg ? 0 : reg)); + if (MACHOPIC_INDIRECT && GET_CODE (orig) == CONST_INT) + result = plus_constant (base, INTVAL (orig)); + else + result = gen_rtx_PLUS (Pmode, base, orig); + + if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) + { + if (reg) + { + emit_move_insn (reg, result); + result = reg; + } + else + result = force_reg (GET_MODE (result), result); + } + return result; + } + break; + + default: + break; + } /* End switch (GET_CODE (orig)) */ + /* APPLE LOCAL end dynamic-no-pic */ + return ptr_ref; +} + +/* APPLE LOCAL begin 4380289 */ +/* Force a Mach-O stub. Expects MEM(SYM_REF(foo)). No sanity + checking. */ +static inline rtx +machopic_force_stub (rtx target) +{ + rtx sym_ref = XEXP (target, 0); + rtx new_target; + enum machine_mode mem_mode = GET_MODE (target); + enum machine_mode sym_mode = GET_MODE (XEXP (target, 0)); + const char *stub_name = XSTR (sym_ref, 0); + + stub_name = machopic_indirection_name (sym_ref, /*stub_p=*/true); + + new_target = gen_rtx_MEM (mem_mode, gen_rtx_SYMBOL_REF (sym_mode, stub_name)); + SYMBOL_REF_DATA (XEXP (new_target, 0)) = SYMBOL_REF_DATA (sym_ref); + MEM_READONLY_P (new_target) = 1; + MEM_NOTRAP_P (new_target) = 1; + return new_target; +} + +/* Like machopic_indirect_call_target, but always stubify, + and don't re-stubify anything already stubified. */ +rtx +machopic_force_indirect_call_target (rtx target) +{ + if (MEM_P (target)) + { + rtx sym_ref = XEXP (target, 0); + const char *stub_name = XSTR (sym_ref, 0); + unsigned int stub_name_length = strlen (stub_name); + + /* If "$stub" suffix absent, add it. */ + if (stub_name_length < 6 || strcmp ("$stub", stub_name + stub_name_length - 5)) + target = machopic_force_stub (target); + } + + return target; +} +/* APPLE LOCAL end 4380289 */ + +/* Transform TARGET (a MEM), which is a function call target, to the + corresponding symbol_stub if necessary. Return a new MEM. */ + +rtx +machopic_indirect_call_target (rtx target) +{ + /* APPLE LOCAL begin axe stubs 5571540 */ + if (! darwin_stubs) + return target; + /* APPLE LOCAL end axe stubs 5571540 */ + + if (GET_CODE (target) != MEM) + return target; + + if (MACHOPIC_INDIRECT + && GET_CODE (XEXP (target, 0)) == SYMBOL_REF + && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) + & MACHO_SYMBOL_FLAG_DEFINED)) + /* APPLE LOCAL begin 4380289 */ + target = machopic_force_stub (target); + /* APPLE LOCAL end 4380289 */ + + return target; +} + +rtx +machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) +{ + rtx pic_ref = orig; + + if (! MACHOPIC_INDIRECT) + return orig; + + /* First handle a simple SYMBOL_REF or LABEL_REF */ + if (GET_CODE (orig) == LABEL_REF + || (GET_CODE (orig) == SYMBOL_REF + )) + { + /* addr(foo) = &func+(foo-func) */ + rtx pic_base; + + orig = machopic_indirect_data_reference (orig, reg); + + if (GET_CODE (orig) == PLUS + && GET_CODE (XEXP (orig, 0)) == REG) + { + if (reg == 0) + return force_reg (mode, orig); + + emit_move_insn (reg, orig); + return reg; + } + + /* if dynamic-no-pic we don't have a pic base */ + if (MACHO_DYNAMIC_NO_PIC_P) + pic_base = NULL; + else + pic_base = machopic_function_base_sym (); + + if (GET_CODE (orig) == MEM) + { + if (reg == 0) + { + gcc_assert (!reload_in_progress); + reg = gen_reg_rtx (Pmode); + } + +#ifdef HAVE_lo_sum + if (MACHO_DYNAMIC_NO_PIC_P + && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF + || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) + { +#if defined (TARGET_TOC) /* ppc */ + rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); + rtx asym = XEXP (orig, 0); + rtx mem; + + emit_insn (gen_macho_high (temp_reg, asym)); + mem = gen_const_mem (GET_MODE (orig), + gen_rtx_LO_SUM (Pmode, temp_reg, asym)); + emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); +#else + /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ + gcc_unreachable (); +#endif + pic_ref = reg; + } + else + if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF + || GET_CODE (XEXP (orig, 0)) == LABEL_REF) + { + rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); +#if defined (TARGET_TOC) /* i.e., PowerPC */ + /* Generating a new reg may expose opportunities for + common subexpression elimination. */ + rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); + rtx mem; + rtx insn; + rtx sum; + + sum = gen_rtx_HIGH (Pmode, offset); + if (! MACHO_DYNAMIC_NO_PIC_P) + sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); + + emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); + + mem = gen_const_mem (GET_MODE (orig), + gen_rtx_LO_SUM (Pmode, + hi_sum_reg, offset)); + insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); + REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, + REG_NOTES (insn)); + + pic_ref = reg; +#else + emit_insn (gen_rtx_USE (VOIDmode, + gen_rtx_REG (Pmode, + PIC_OFFSET_TABLE_REGNUM))); + + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_HIGH (Pmode, + gen_rtx_CONST (Pmode, + offset)))); + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_LO_SUM (Pmode, reg, + gen_rtx_CONST (Pmode, offset)))); + pic_ref = gen_rtx_PLUS (Pmode, + pic_offset_table_rtx, reg); +#endif + } + else +#endif /* HAVE_lo_sum */ + { + rtx pic = pic_offset_table_rtx; + if (GET_CODE (pic) != REG) + { + emit_move_insn (reg, pic); + pic = reg; + } +#if 0 + emit_insn (gen_rtx_USE (VOIDmode, + gen_rtx_REG (Pmode, + PIC_OFFSET_TABLE_REGNUM))); +#endif + + if (reload_in_progress) + regs_ever_live[REGNO (pic)] = 1; + pic_ref = gen_rtx_PLUS (Pmode, pic, + gen_pic_offset (XEXP (orig, 0), + pic_base)); + } + +#if !defined (TARGET_TOC) + emit_move_insn (reg, pic_ref); + pic_ref = gen_const_mem (GET_MODE (orig), reg); +#endif + } + else + { + +#ifdef HAVE_lo_sum + if (GET_CODE (orig) == SYMBOL_REF + || GET_CODE (orig) == LABEL_REF) + { + rtx offset = gen_pic_offset (orig, pic_base); +#if defined (TARGET_TOC) /* i.e., PowerPC */ + rtx hi_sum_reg; + + if (reg == 0) + { + gcc_assert (!reload_in_progress); + reg = gen_reg_rtx (Pmode); + } + + hi_sum_reg = reg; + + emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, + (MACHO_DYNAMIC_NO_PIC_P) + ? gen_rtx_HIGH (Pmode, offset) + : gen_rtx_PLUS (Pmode, + pic_offset_table_rtx, + gen_rtx_HIGH (Pmode, + offset)))); + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_LO_SUM (Pmode, + hi_sum_reg, offset))); + pic_ref = reg; +#else + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_HIGH (Pmode, offset))); + emit_insn (gen_rtx_SET (VOIDmode, reg, + gen_rtx_LO_SUM (Pmode, reg, offset))); + pic_ref = gen_rtx_PLUS (Pmode, + pic_offset_table_rtx, reg); +#endif + } + else +#endif /* HAVE_lo_sum */ + { + if (REG_P (orig) + || GET_CODE (orig) == SUBREG) + { + return orig; + } + else + { + rtx pic = pic_offset_table_rtx; + if (GET_CODE (pic) != REG) + { + emit_move_insn (reg, pic); + pic = reg; + } +#if 0 + emit_insn (gen_rtx_USE (VOIDmode, + pic_offset_table_rtx)); +#endif + if (reload_in_progress) + regs_ever_live[REGNO (pic)] = 1; + pic_ref = gen_rtx_PLUS (Pmode, + pic, + gen_pic_offset (orig, pic_base)); + } + } + } + + if (GET_CODE (pic_ref) != REG) + { + if (reg != 0) + { + emit_move_insn (reg, pic_ref); + return reg; + } + else + { + return force_reg (mode, pic_ref); + } + } + else + { + return pic_ref; + } + } + + else if (GET_CODE (orig) == SYMBOL_REF) + return orig; + + else if (GET_CODE (orig) == PLUS + && (GET_CODE (XEXP (orig, 0)) == MEM + || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF + || GET_CODE (XEXP (orig, 0)) == LABEL_REF) + && XEXP (orig, 0) != pic_offset_table_rtx + && GET_CODE (XEXP (orig, 1)) != REG) + + { + rtx base; + int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); + + base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); + orig = machopic_legitimize_pic_address (XEXP (orig, 1), + Pmode, (base == reg ? 0 : reg)); + if (GET_CODE (orig) == CONST_INT) + { + pic_ref = plus_constant (base, INTVAL (orig)); + is_complex = 1; + } + else + pic_ref = gen_rtx_PLUS (Pmode, base, orig); + + /* APPLE LOCAL begin gen ADD */ +#ifdef MASK_80387 + { + rtx mem, other; + + if (GET_CODE (orig) == MEM) { + mem = orig; other = base; + /* Swap the kids only if there is only one MEM, and it's on the right. */ + if (GET_CODE (base) != MEM) { + XEXP (pic_ref, 0) = orig; + XEXP (pic_ref, 1) = base; + } + } + else if (GET_CODE (base) == MEM) { + mem = base; other = orig; + } else + mem = other = NULL_RTX; + + /* Both kids are MEMs. */ + if (other && GET_CODE (other) == MEM) + other = force_reg (GET_MODE (other), other); + + /* The x86 can't post-index a MEM; emit an ADD instruction to handle this. */ + if (mem && GET_CODE (mem) == MEM) { + if ( ! reload_in_progress) { + rtx set = gen_rtx_SET (VOIDmode, reg, pic_ref); + rtx clobber_cc = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (CCmode, FLAGS_REG)); + pic_ref = gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, set, clobber_cc)); + emit_insn (pic_ref); + pic_ref = reg; + is_complex = 0; + } + } + } +#endif + /* APPLE LOCAL end gen ADD */ + + if (reg && is_complex) + { + emit_move_insn (reg, pic_ref); + pic_ref = reg; + } + /* Likewise, should we set special REG_NOTEs here? */ + } + + else if (GET_CODE (orig) == CONST) + { + return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); + } + + else if (GET_CODE (orig) == MEM + && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) + { + /* APPLE LOCAL begin use new pseudo for temp; reusing reg confuses PRE */ + rtx tempreg = reg; + rtx addr; + if ( !no_new_pseudos ) + tempreg = gen_reg_rtx (Pmode); + addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, tempreg); + /* APPLE LOCAL end use new pseudo for temp; reusing reg confuses PRE */ + addr = replace_equiv_address (orig, addr); + emit_move_insn (reg, addr); + pic_ref = reg; + } + + return pic_ref; +} + +/* Output the stub or non-lazy pointer in *SLOT, if it has been used. + DATA is the FILE* for assembly output. Called from + htab_traverse. */ + +static int +machopic_output_indirection (void **slot, void *data) +{ + machopic_indirection *p = *((machopic_indirection **) slot); + FILE *asm_out_file = (FILE *) data; + rtx symbol; + const char *sym_name; + const char *ptr_name; + + /* APPLE LOCAL ARM 5440570 */ + if (!p->used || p->emitted) + return 1; + + symbol = p->symbol; + sym_name = XSTR (symbol, 0); + ptr_name = p->ptr_name; + + if (p->stub_p) + { + char *sym; + char *stub; + tree id; + + id = maybe_get_identifier (sym_name); + if (id) + { + tree id_orig = id; + + while (IDENTIFIER_TRANSPARENT_ALIAS (id)) + id = TREE_CHAIN (id); + if (id != id_orig) + sym_name = IDENTIFIER_POINTER (id); + } + + sym = alloca (strlen (sym_name) + 2); + if (sym_name[0] == '*' || sym_name[0] == '&') + strcpy (sym, sym_name + 1); + else if (sym_name[0] == '-' || sym_name[0] == '+') + strcpy (sym, sym_name); + else + sprintf (sym, "%s%s", user_label_prefix, sym_name); + + stub = alloca (strlen (ptr_name) + 2); + if (ptr_name[0] == '*' || ptr_name[0] == '&') + strcpy (stub, ptr_name + 1); + else + sprintf (stub, "%s%s", user_label_prefix, ptr_name); + + machopic_output_stub (asm_out_file, sym, stub); + } + else if (! indirect_data (symbol) + && (machopic_symbol_defined_p (symbol) + || SYMBOL_REF_LOCAL_P (symbol))) + { + switch_to_section (data_section); + assemble_align (GET_MODE_ALIGNMENT (Pmode)); + assemble_label (ptr_name); + assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), + GET_MODE_SIZE (Pmode), + GET_MODE_ALIGNMENT (Pmode), 1); + } + else + { + rtx init = const0_rtx; + + switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); + assemble_name (asm_out_file, ptr_name); + fprintf (asm_out_file, ":\n"); + + fprintf (asm_out_file, "\t.indirect_symbol "); + assemble_name (asm_out_file, sym_name); + fprintf (asm_out_file, "\n"); + + /* Variables that are marked with MACHO_SYMBOL_STATIC need to + have their symbol name instead of 0 in the second entry of + the non-lazy symbol pointer data structure when they are + defined. This allows the runtime to rebind newer instances + of the translation unit with the original instance of the + symbol. */ + + if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) + && machopic_symbol_defined_p (symbol)) + init = gen_rtx_SYMBOL_REF (Pmode, sym_name); + + assemble_integer (init, GET_MODE_SIZE (Pmode), + GET_MODE_ALIGNMENT (Pmode), 1); + } + /* APPLE LOCAL ARM 5440570 */ + p->emitted = true; + + return 1; +} + +void +machopic_finish (FILE *asm_out_file) +{ + if (machopic_indirections) + /* APPLE LOCAL begin 5440570 */ + do + { + indirection_uses_changed = false; + htab_traverse_noresize (machopic_indirections, + machopic_output_indirection, + asm_out_file); + } + while (indirection_uses_changed == true); + /* APPLE LOCAL end 5440570 */ +} + +int +machopic_operand_p (rtx op) +{ + if (MACHOPIC_JUST_INDIRECT) + { + while (GET_CODE (op) == CONST) + op = XEXP (op, 0); + + if (GET_CODE (op) == SYMBOL_REF) + return machopic_symbol_defined_p (op); + else + return 0; + } + + while (GET_CODE (op) == CONST) + op = XEXP (op, 0); + + if (GET_CODE (op) == MINUS + && GET_CODE (XEXP (op, 0)) == SYMBOL_REF + && GET_CODE (XEXP (op, 1)) == SYMBOL_REF + && machopic_symbol_defined_p (XEXP (op, 0)) + && machopic_symbol_defined_p (XEXP (op, 1))) + return 1; + + return 0; +} + +/* This function records whether a given name corresponds to a defined + or undefined function or variable, for machopic_classify_ident to + use later. */ + +void +darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) +{ + rtx sym_ref; + + /* Do the standard encoding things first. */ + default_encode_section_info (decl, rtl, first); + + if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) + return; + + sym_ref = XEXP (rtl, 0); + if (TREE_CODE (decl) == VAR_DECL) + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; + + if (!DECL_EXTERNAL (decl) + && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) + && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) + && ((TREE_STATIC (decl) + && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) + || (!DECL_COMMON (decl) && DECL_INITIAL (decl) + && DECL_INITIAL (decl) != error_mark_node))) + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; + + if (! TREE_PUBLIC (decl)) + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; + + /* APPLE LOCAL begin fix OBJC codegen */ + if (TREE_CODE (decl) == VAR_DECL) + { + if (strncmp (XSTR (sym_ref, 0), "_OBJC_", 6) == 0) + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; + } + /* APPLE LOCAL end fix OBJC codegen */ +} + +void +darwin_mark_decl_preserved (const char *name) +{ + fprintf (asm_out_file, ".no_dead_strip "); + assemble_name (asm_out_file, name); + fputc ('\n', asm_out_file); +} + +int +machopic_reloc_rw_mask (void) +{ + return MACHOPIC_INDIRECT ? 3 : 0; +} + +/* APPLE LOCAL begin radar 5575115, 6255595 */ +/* This routine returns TRUE if EXP is a variable representing + on objective C meta data. */ +static inline bool +objc_internal_variable_name (tree exp) +{ + if (TREE_CODE (exp) == VAR_DECL) + { + tree decl_name = DECL_NAME (exp); + if (decl_name && TREE_CODE (decl_name) == IDENTIFIER_NODE + && IDENTIFIER_POINTER (decl_name)) + { + const char* name = IDENTIFIER_POINTER (decl_name); + return + (!strncmp (name, "_OBJC_", 6) + || !strncmp (name, "OBJC_", 5) + || !strncmp (name, "l_OBJC_", 7) + || !strncmp (name, "l_objc_", 7)); + } + } + return false; +} +/* APPLE LOCAL end radar 5575115, 6255595 */ + +section * +machopic_select_section (tree exp, int reloc, + unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) +{ + section *base_section; + bool weak_p = (DECL_P (exp) && DECL_WEAK (exp) + && (lookup_attribute ("weak", DECL_ATTRIBUTES (exp)) + || ! lookup_attribute ("weak_import", + DECL_ATTRIBUTES (exp)))); + + if (TREE_CODE (exp) == FUNCTION_DECL) + { + if (reloc == 1) + base_section = (weak_p + ? darwin_sections[text_unlikely_coal_section] + : unlikely_text_section ()); + else + base_section = weak_p ? darwin_sections[text_coal_section] : text_section; + } + else if (decl_readonly_section (exp, reloc)) + base_section = weak_p ? darwin_sections[const_coal_section] : darwin_sections[const_section]; + else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) + base_section = weak_p ? darwin_sections[const_data_coal_section] : darwin_sections[const_data_section]; + else + base_section = weak_p ? darwin_sections[data_coal_section] : data_section; + + /* APPLE LOCAL begin fwritable strings */ + if (TREE_CODE (exp) == STRING_CST + /* APPLE LOCAL begin 5612787 mainline sse4 */ + /* deletion */ + /* Copied from varasm.c:output_constant_def_contents(). 5346453 */ + && (MAX ((HOST_WIDE_INT)TREE_STRING_LENGTH (exp), + int_size_in_bytes (TREE_TYPE (exp))) + /* APPLE LOCAL ARM signedness mismatch */ + == (HOST_WIDE_INT) strlen (TREE_STRING_POINTER (exp)) + 1) + /* APPLE LOCAL end 5612787 mainline sse4 */ + && ! flag_writable_strings) + return darwin_sections[cstring_section]; + /* APPLE LOCAL end fwritable strings, 5346453 */ + else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) + && flag_merge_constants) + { + tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); + + if (TREE_CODE (size) == INTEGER_CST && + TREE_INT_CST_LOW (size) == 4 && + TREE_INT_CST_HIGH (size) == 0) + return darwin_sections[literal4_section]; + else if (TREE_CODE (size) == INTEGER_CST && + TREE_INT_CST_LOW (size) == 8 && + TREE_INT_CST_HIGH (size) == 0) + return darwin_sections[literal8_section]; + /* APPLE LOCAL begin mainline x86_64 literal16 */ +#ifndef HAVE_GAS_LITERAL16 +#define HAVE_GAS_LITERAL16 0 +#endif + else if (HAVE_GAS_LITERAL16 + && TARGET_64BIT + /* APPLE LOCAL end mainline x86_64 literal16 */ + && TREE_CODE (size) == INTEGER_CST + && TREE_INT_CST_LOW (size) == 16 + && TREE_INT_CST_HIGH (size) == 0) + return darwin_sections[literal16_section]; + else + return base_section; + } + else if (TREE_CODE (exp) == CONSTRUCTOR + && TREE_TYPE (exp) + && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE + && TYPE_NAME (TREE_TYPE (exp))) + { + /* APPLE LOCAL constant strings */ + extern int flag_next_runtime; + tree name = TYPE_NAME (TREE_TYPE (exp)); + if (TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + + if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) + { + /* APPLE LOCAL begin radar 4792158 */ + if (flag_next_runtime) + { + if (flag_objc_abi == 2) + return darwin_sections[objc_v2_constant_string_object_section]; + else + return darwin_sections[objc_constant_string_object_section]; + } + /* APPLE LOCAL end radar 4792158 */ + else + return darwin_sections[objc_string_object_section]; + } + /* APPLE LOCAL begin constant strings */ + else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) + return darwin_sections[cfstring_constant_object_section]; + /* APPLE LOCAL end constant strings */ + else + return base_section; + } + /* APPLE LOCAL begin radar 5575115, 6255595 */ + else if (objc_internal_variable_name (exp)) + /* APPLE LOCAL end radar 5575115, 6255595 */ + { + const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); + /* APPLE LOCAL begin radar 4792158 */ + if (flag_objc_abi == 1) + { + if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) + return darwin_sections[objc_cls_meth_section]; + else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) + return darwin_sections[objc_inst_meth_section]; + else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) + return darwin_sections[objc_cat_cls_meth_section]; + else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) + return darwin_sections[objc_cat_inst_meth_section]; + else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) + return darwin_sections[objc_class_vars_section]; + else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) + return darwin_sections[objc_instance_vars_section]; + else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) + return darwin_sections[objc_cat_cls_meth_section]; + else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) + return darwin_sections[objc_class_names_section]; + else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) + return darwin_sections[objc_meth_var_names_section]; + else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) + return darwin_sections[objc_meth_var_types_section]; + else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) + return darwin_sections[objc_cls_refs_section]; + else if (!strncmp (name, "_OBJC_CLASS_", 12)) + return darwin_sections[objc_class_section]; + else if (!strncmp (name, "_OBJC_METACLASS_", 16)) + return darwin_sections[objc_meta_class_section]; + else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) + return darwin_sections[objc_category_section]; + else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) + return darwin_sections[objc_selector_refs_section]; + else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) + return darwin_sections[objc_selector_fixup_section]; + else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) + return darwin_sections[objc_symbols_section]; + else if (!strncmp (name, "_OBJC_MODULES", 13)) + return darwin_sections[objc_module_info_section]; + else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) + return darwin_sections[objc_image_info_section]; + else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) + return darwin_sections[objc_cat_inst_meth_section]; + else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) + return darwin_sections[objc_cat_cls_meth_section]; + else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) + return darwin_sections[objc_cat_cls_meth_section]; + else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) + return darwin_sections[objc_protocol_section]; + else if (!strncmp (name, "_OBJC_CLASSEXT_", 15)) + return darwin_sections[objc_class_ext_section]; + else if (!strncmp (name, "_OBJC_$_PROP_LIST", 17) + || !strncmp (name, "_OBJC_$_PROP_PROTO", 18)) + return darwin_sections[objc_prop_list_section]; + else if (!strncmp (name, "_OBJC_PROTOCOLEXT", 17)) + return darwin_sections[objc_protocol_ext_section]; + else if (!strncmp (name, "_OBJC_PROP_NAME_ATTR_", 21)) + return darwin_sections[cstring_section]; + else + return base_section; + } + else /* flag_objc_abi == 2 */ + { + if (!strncmp (name, "_OBJC_PROP_NAME_ATTR_", 21) + || !strncmp (name, "_OBJC_CLASS_NAME_", 17) + || !strncmp (name, "_OBJC_METH_VAR_NAME_", 20) + || !strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) + return darwin_sections[cstring_section]; + else if (!strncmp (name, "_OBJC_CLASSLIST_REFERENCES_", 27)) + return darwin_sections[objc_v2_classrefs_section]; + else if (!strncmp (name, "_OBJC_CLASSLIST_SUP_REFS_", 25)) + return darwin_sections[objc_v2_super_classrefs_section]; + /* APPLE LOCAL radar 5575115 - radar 6252174 */ + else if (!strncmp (name, "l_objc_msgSend", 14)) + return darwin_sections[objc_v2_message_refs_section]; + else if (!strncmp (name, "_OBJC_LABEL_CLASS_", 18)) + return darwin_sections[objc_v2_classlist_section]; + /* APPLE LOCAL radar 6351990 */ + else if (!strncmp (name, "l_OBJC_LABEL_PROTOCOL_", 22)) + return darwin_sections[objc_v2_protocollist_section]; + else if (!strncmp (name, "_OBJC_LABEL_CATEGORY_", 21)) + return darwin_sections[objc_v2_categorylist_section]; + else if (!strncmp (name, "_OBJC_LABEL_NONLAZY_CLASS_", 26)) + return darwin_sections[objc_v2_nonlazy_class_section]; + else if (!strncmp (name, "_OBJC_LABEL_NONLAZY_CATEGORY_", 29)) + return darwin_sections[objc_v2_nonlazy_category_section]; + /* APPLE LOCAL radar 6351990 */ + else if (!strncmp (name, "l_OBJC_PROTOCOL_REFERENCE_", 26)) + return darwin_sections[objc_v2_protocolrefs_section]; + else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) + return darwin_sections[objc_v2_selector_refs_section]; + else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) + return darwin_sections[objc_v2_image_info_section]; + /* APPLE LOCAL begin radar 6255595 */ + else if (!strncmp (name, "OBJC_CLASS_$_", 13) + || !strncmp (name, "OBJC_METACLASS_$_", 17)) + return darwin_sections[objc_v2_classdefs_section]; + else + return (base_section == data_section) ? + darwin_sections[objc_v2_metadata_section] : base_section; + /* APPLE LOCAL end radar 6255595 */ + } + /* APPLE LOCAL end radar 4792158 */ + } + /* APPLE LOCAL coalescing */ + /* Removed special handling of '::operator new' and '::operator delete'. */ + /* APPLE LOCAL begin darwin_set_section_for_var_p */ + else + return darwin_set_section_for_var_p (exp, reloc, align, base_section); + /* APPLE LOCAL end darwin_set_section_for_var_p */ +} + +/* This can be called with address expressions as "rtx". + They must go in "const". */ + +section * +machopic_select_rtx_section (enum machine_mode mode, rtx x, + unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) +{ + if (GET_MODE_SIZE (mode) == 8 + && (GET_CODE (x) == CONST_INT + || GET_CODE (x) == CONST_DOUBLE)) + return darwin_sections[literal8_section]; + else if (GET_MODE_SIZE (mode) == 4 + && (GET_CODE (x) == CONST_INT + || GET_CODE (x) == CONST_DOUBLE)) + return darwin_sections[literal4_section]; + /* APPLE LOCAL begin mainline x86_64 literal16 */ + else if (HAVE_GAS_LITERAL16 + && TARGET_64BIT + /* APPLE LOCAL end mainline x86_64 literal16 */ + && GET_MODE_SIZE (mode) == 16 + && (GET_CODE (x) == CONST_INT + || GET_CODE (x) == CONST_DOUBLE + || GET_CODE (x) == CONST_VECTOR)) + return darwin_sections[literal16_section]; + else if (MACHOPIC_INDIRECT + && (GET_CODE (x) == SYMBOL_REF + || GET_CODE (x) == CONST + || GET_CODE (x) == LABEL_REF)) + return darwin_sections[const_data_section]; + else + return darwin_sections[const_section]; +} + +void +machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) +{ + if (MACHOPIC_INDIRECT) + switch_to_section (darwin_sections[mod_init_section]); + else + switch_to_section (darwin_sections[constructor_section]); + assemble_align (POINTER_SIZE); + assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); + + if (! MACHOPIC_INDIRECT) + fprintf (asm_out_file, ".reference .constructors_used\n"); +} + +void +machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) +{ + if (MACHOPIC_INDIRECT) + switch_to_section (darwin_sections[mod_term_section]); + else + switch_to_section (darwin_sections[destructor_section]); + assemble_align (POINTER_SIZE); + assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); + + if (! MACHOPIC_INDIRECT) + fprintf (asm_out_file, ".reference .destructors_used\n"); +} + +void +darwin_globalize_label (FILE *stream, const char *name) +{ + if (!!strncmp (name, "_OBJC_", 6)) + default_globalize_label (stream, name); +} + +/* APPLE LOCAL begin assembly "abort" directive */ +/* This can be called instead of EXIT. It will emit a '.abort' directive + into any existing assembly file, causing assembly to immediately abort, + thus preventing the assembler from spewing out numerous, irrelevant + error messages. */ + +void +abort_assembly_and_exit (int status) +{ + /* If we're aborting, get the assembler to abort, too. */ + if (status == FATAL_EXIT_CODE && asm_out_file != 0) + fprintf (asm_out_file, "\n.abort\n"); + + exit (status); +} +/* APPLE LOCAL end assembly "abort" directive */ + +/* APPLE LOCAL begin ObjC GC */ +tree +darwin_handle_objc_gc_attribute (tree *node, + tree name, + tree args, + int flags ATTRIBUTE_UNUSED, + bool *no_add_attrs) +{ + tree orig = *node, type; + + /* Propagate GC-ness to the innermost pointee. */ + while (POINTER_TYPE_P (orig) + || TREE_CODE (orig) == FUNCTION_TYPE + || TREE_CODE (orig) == METHOD_TYPE + || TREE_CODE (orig) == ARRAY_TYPE) + orig = TREE_TYPE (orig); + + type = build_type_attribute_variant (orig, + tree_cons (name, args, + TYPE_ATTRIBUTES (orig))); + + /* For some reason, build_type_attribute_variant() creates a distinct + type instead of a true variant! We make up for this here. */ + /* APPLE LOCAL begin radar 4600999 */ + /* The main variant must be preserved no matter what. What ever + main variant comes out of the call to build_type_attribute_variant + is bogus here. */ + if (TYPE_MAIN_VARIANT (orig) != TYPE_MAIN_VARIANT (type)) + { + TYPE_MAIN_VARIANT (type) = TYPE_MAIN_VARIANT (orig); + /* APPLE LOCAL end radar 4600999 */ + TYPE_NEXT_VARIANT (type) = TYPE_NEXT_VARIANT (orig); + TYPE_NEXT_VARIANT (orig) = type; + } + + *node = reconstruct_complex_type (*node, type); + /* No need to hang on to the attribute any longer. */ + *no_add_attrs = true; + + return NULL_TREE; +} +/* APPLE LOCAL end ObjC GC */ + +/* APPLE LOCAL begin radar 5595352 */ +tree +darwin_handle_nsobject_attribute (tree *node, + tree name, + tree args ATTRIBUTE_UNUSED, + int flags ATTRIBUTE_UNUSED, + bool *no_add_attrs) +{ + tree orig = *node, type; + if (!POINTER_TYPE_P (orig) || TREE_CODE (TREE_TYPE (orig)) != RECORD_TYPE) + { + error ("__attribute ((NSObject)) is for pointer types only"); + return NULL_TREE; + } + type = build_type_attribute_variant (orig, + tree_cons (name, NULL_TREE, + TYPE_ATTRIBUTES (orig))); + /* The main variant must be preserved no matter what. What ever + main variant comes out of the call to build_type_attribute_variant + is bogus here. */ + if (TYPE_MAIN_VARIANT (orig) != TYPE_MAIN_VARIANT (type)) + { + TYPE_MAIN_VARIANT (type) = TYPE_MAIN_VARIANT (orig); + TYPE_NEXT_VARIANT (type) = TYPE_NEXT_VARIANT (orig); + TYPE_NEXT_VARIANT (orig) = type; + } + + *node = type; + /* No need to hang on to the attribute any longer. */ + *no_add_attrs = true; + return NULL_TREE; +} +/* APPLE LOCAL end radar 5595352 */ + +/* APPLE LOCAL begin darwin_set_section_for_var_p 20020226 --turly */ + +/* This is specifically for any initialised static class constants + which may be output by the C++ front end at the end of compilation. + SELECT_SECTION () macro won't do because these are VAR_DECLs, not + STRING_CSTs or INTEGER_CSTs. And by putting 'em in appropriate + sections, we save space. + + FIXME: does this really do anything? Won't the DECL_WEAK test be + true 99% (or 100%) of the time? In the other 1% of the time, + shouldn't select_section be fixed instead of this hackery? */ + +section* +darwin_set_section_for_var_p (tree exp, int reloc, int align, section* base_section) +{ + if (!reloc && TREE_CODE (exp) == VAR_DECL + && DECL_ALIGN (exp) == align + && TREE_READONLY (exp) && DECL_INITIAL (exp) + && ! DECL_WEAK (exp)) + { + /* Put constant string vars in ".cstring" section. */ + + if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE + && TREE_CODE (TREE_TYPE (TREE_TYPE (exp))) == INTEGER_TYPE + && integer_onep (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (exp)))) + && TREE_CODE (DECL_INITIAL (exp)) == STRING_CST) + { + + /* Compare string length with actual number of characters + the compiler will write out (which is not necessarily + TREE_STRING_LENGTH, in the case of a constant array of + characters that is not null-terminated). Select appropriate + section accordingly. */ + + if (MIN ( TREE_STRING_LENGTH (DECL_INITIAL(exp)), + int_size_in_bytes (TREE_TYPE (exp))) + == (long) strlen (TREE_STRING_POINTER (DECL_INITIAL (exp))) + 1) + return darwin_sections[cstring_section]; + else + return darwin_sections[const_section]; + } + else + if (TREE_READONLY (exp) + && ((TREE_CODE (TREE_TYPE (exp)) == INTEGER_TYPE + && TREE_CODE (DECL_INITIAL (exp)) == INTEGER_CST) + || (TREE_CODE (TREE_TYPE (exp)) == REAL_TYPE + && TREE_CODE (DECL_INITIAL (exp)) == REAL_CST)) + && TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (DECL_INITIAL (exp)))) + == INTEGER_CST) + { + tree size = TYPE_SIZE_UNIT (TREE_TYPE (DECL_INITIAL (exp))); + if (TREE_INT_CST_HIGH (size) != 0) + return base_section; + + /* Put integer and float consts in the literal4|8|16 sections. */ + + if (TREE_INT_CST_LOW (size) == 4) + return darwin_sections[literal4_section]; + else if (TREE_INT_CST_LOW (size) == 8) + return darwin_sections[literal8_section]; + else if (HAVE_GAS_LITERAL16 + && TARGET_64BIT + && TREE_INT_CST_LOW (size) == 16) + return darwin_sections[literal16_section]; + } + } + + return base_section; +} +/* APPLE LOCAL end darwin_set_section_for_var_p 20020226 --turly */ + +void +darwin_asm_named_section (const char *name, + unsigned int flags ATTRIBUTE_UNUSED, + tree decl ATTRIBUTE_UNUSED) +{ + fprintf (asm_out_file, "\t.section %s\n", name); +} + +void +darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) +{ + /* Darwin does not use unique sections. */ +} + +/* Handle __attribute__ ((apple_kext_compatibility)). + This only applies to darwin kexts for 2.95 compatibility -- it shrinks the + vtable for classes with this attribute (and their descendants) by not + outputting the new 3.0 nondeleting destructor. This means that such + objects CANNOT be allocated on the stack or as globals UNLESS they have + a completely empty `operator delete'. + Luckily, this fits in with the Darwin kext model. + + This attribute also disables gcc3's potential overlaying of derived + class data members on the padding at the end of the base class. */ + +tree +darwin_handle_kext_attribute (tree *node, tree name, + tree args ATTRIBUTE_UNUSED, + int flags ATTRIBUTE_UNUSED, + bool *no_add_attrs) +{ + /* APPLE KEXT stuff -- only applies with pure static C++ code. */ + if (! TARGET_KEXTABI) + { + warning (0, "%<%s%> 2.95 vtable-compatability attribute applies " + "only when compiling a kext", IDENTIFIER_POINTER (name)); + + *no_add_attrs = true; + } + else if (TREE_CODE (*node) != RECORD_TYPE) + { + warning (0, "%<%s%> 2.95 vtable-compatability attribute applies " + "only to C++ classes", IDENTIFIER_POINTER (name)); + + *no_add_attrs = true; + } + + return NULL_TREE; +} + +/* APPLE LOCAL begin radar 4733555 */ +/* Ick, this probably will cause other languages to die. */ +extern bool objc_method_decl (enum tree_code ARG_UNUSED (opcode)); + /* APPLE LOCAL end radar 4733555 */ + +/* Handle a "weak_import" attribute; arguments as in + struct attribute_spec.handler. */ + +tree +darwin_handle_weak_import_attribute (tree *node, tree name, + tree ARG_UNUSED (args), + int ARG_UNUSED (flags), + bool * no_add_attrs) +{ + /* APPLE LOCAL begin radar 4733555 */ + /* The compiler should silently ignore weak_import when specified on a method. All + Objective-C methods are "weak" in the sense that the availability macros want. */ + if (objc_method_decl (TREE_CODE (*node))) + return NULL_TREE; + /* APPLE LOCAL end radar 4733555 */ + /* APPLE LOCAL begin weak_import on property 6676828 */ + if (in_objc_property_decl_context ()) + { + *no_add_attrs = true; + return NULL_TREE; + } + /* APPLE LOCAL end weak_import on property 6676828 */ + if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) + { + warning (OPT_Wattributes, "%qs attribute ignored", + IDENTIFIER_POINTER (name)); + *no_add_attrs = true; + } + else + declare_weak (*node); + + return NULL_TREE; +} + +/* APPLE LOCAL begin for-fsf-4_4 5480287 */ \ +/* APPLE LOCAL end for-fsf-4_4 5480287 */ \ +/* Emit a label for an FDE, making it global and/or weak if appropriate. + The third parameter is nonzero if this is for exception handling. + The fourth parameter is nonzero if this is just a placeholder for an + FDE that we are omitting. */ + +void +darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) +{ +/* APPLE LOCAL begin for-fsf-4_4 5480287 */ \ + char *lab; + + if (! for_eh) + return; + + lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), ".eh", NULL); + + if (TREE_PUBLIC (decl)) + { + targetm.asm_out.globalize_label (file, lab); + if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) + { + fputs ("\t.private_extern ", file); + assemble_name (file, lab); + fputc ('\n', file); + } + } + + if (DECL_WEAK (decl)) + { + fputs ("\t.weak_definition ", file); + assemble_name (file, lab); + fputc ('\n', file); + } + + assemble_name (file, lab); + if (empty) + { + fputs (" = 0\n", file); + + /* Mark the absolute .eh and .eh1 style labels as needed to + ensure that we don't dead code strip them and keep such + labels from another instantiation point until we can fix this + properly with group comdat support. */ + darwin_mark_decl_preserved (lab); + } + else + fputs (":\n", file); + +/* APPLE LOCAL end for-fsf-4_4 5480287 */ \ + free (lab); +} + +static GTY(()) unsigned long except_table_label_num; + +void +darwin_emit_except_table_label (FILE *file) +{ + char section_start_label[30]; + + ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", + except_table_label_num++); + ASM_OUTPUT_LABEL (file, section_start_label); +} +/* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ + +void +darwin_non_lazy_pcrel (FILE *file, rtx addr) +{ + const char *nlp_name; + + gcc_assert (GET_CODE (addr) == SYMBOL_REF); + + nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); + fputs ("\t.long\t", file); + ASM_OUTPUT_LABELREF (file, nlp_name); + fputs ("-.", file); +} + +/* Emit an assembler directive to set visibility for a symbol. The + only supported visibilities are VISIBILITY_DEFAULT and + VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private + extern". There is no MACH-O equivalent of ELF's + VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ + +void +darwin_assemble_visibility (tree decl, int vis) +{ + if (vis == VISIBILITY_DEFAULT) + ; + else if (vis == VISIBILITY_HIDDEN) + { + fputs ("\t.private_extern ", asm_out_file); + assemble_name (asm_out_file, + (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); + fputs ("\n", asm_out_file); + } + else + warning (OPT_Wattributes, "internal and protected visibility attributes " + "not supported in this configuration; ignored"); +} + +/* Output a difference of two labels that will be an assembly time + constant if the two labels are local. (.long lab1-lab2 will be + very different if lab1 is at the boundary between two sections; it + will be relocated according to the second section, not the first, + so one ends up with a difference between labels in different + sections, which is bad in the dwarf2 eh context for instance.) */ + +static int darwin_dwarf_label_counter; + +void +darwin_asm_output_dwarf_delta (FILE *file, int size, + const char *lab1, const char *lab2) +{ + int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' + && lab2[0] == '*' && lab2[1] == 'L'); + const char *directive = (size == 8 ? ".quad" : ".long"); + + if (islocaldiff) + fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); + else + fprintf (file, "\t%s\t", directive); + assemble_name_raw (file, lab1); + fprintf (file, "-"); + assemble_name_raw (file, lab2); + if (islocaldiff) + fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); +} + +/* Output labels for the start of the DWARF sections if necessary. */ +void +darwin_file_start (void) +{ + if (write_symbols == DWARF2_DEBUG) + { + static const char * const debugnames[] = + { + DEBUG_FRAME_SECTION, + DEBUG_INFO_SECTION, + DEBUG_ABBREV_SECTION, + DEBUG_ARANGES_SECTION, + DEBUG_MACINFO_SECTION, + DEBUG_LINE_SECTION, + DEBUG_LOC_SECTION, + DEBUG_PUBNAMES_SECTION, + /* APPLE LOCAL begin pubtypes, approved for 4.3 4535968 */ + DEBUG_PUBTYPES_SECTION, + /* APPLE LOCAL end pubtypes, approved for 4.3 4535968 */ + /* APPLE LOCAL radar 6275985 debug inlined section */ + DEBUG_INLINED_SECTION, + DEBUG_STR_SECTION, + DEBUG_RANGES_SECTION + }; + size_t i; + + for (i = 0; i < ARRAY_SIZE (debugnames); i++) + { + int namelen; + + switch_to_section (get_section (debugnames[i], SECTION_DEBUG, NULL)); + + gcc_assert (strncmp (debugnames[i], "__DWARF,", 8) == 0); + gcc_assert (strchr (debugnames[i] + 8, ',')); + + namelen = strchr (debugnames[i] + 8, ',') - (debugnames[i] + 8); + fprintf (asm_out_file, "Lsection%.*s:\n", namelen, debugnames[i] + 8); + } + } +} + +/* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section + offsets are not represented using relocs in .o files; either the + section never leaves the .o file, or the linker or other tool is + responsible for parsing the DWARF and updating the offsets. */ + +void +darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, + section *base) +{ + char sname[64]; + int namelen; + + gcc_assert (base->common.flags & SECTION_NAMED); + gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); + gcc_assert (strchr (base->named.name + 8, ',')); + + namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); + sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); + darwin_asm_output_dwarf_delta (file, size, lab, sname); +} + +void +darwin_file_end (void) +{ + machopic_finish (asm_out_file); + /* APPLE LOCAL constant cfstrings */ + if (darwin_running_cxx) + { + switch_to_section (darwin_sections[constructor_section]); + switch_to_section (darwin_sections[destructor_section]); + ASM_OUTPUT_ALIGN (asm_out_file, 1); + } + /* APPLE LOCAL begin CW asm blocks */ + if (! has_alternative_entry_points ()) + fprintf (asm_out_file, "\t.subsections_via_symbols\n"); + /* APPLE LOCAL end CW asm blocks */ +} + +/* APPLE LOCAL KEXT treat vtables as overridable */ +#define DARWIN_VTABLE_P(DECL) lang_hooks.vtable_p (DECL) + +/* Cross-module name binding. Darwin does not support overriding + functions at dynamic-link time, except for vtables in kexts. */ + +bool +darwin_binds_local_p (tree decl) +{ + return default_binds_local_p_1 (decl, + TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); +} + +/* APPLE LOCAL begin constant cfstrings */ +int darwin_running_cxx; + +static GTY(()) tree cfstring_class_reference = NULL_TREE; +static GTY(()) tree cfstring_type_node = NULL_TREE; +static GTY(()) tree ccfstring_type_node = NULL_TREE; +static GTY(()) tree pccfstring_type_node = NULL_TREE; +static GTY(()) tree pcint_type_node = NULL_TREE; +static GTY(()) tree pcchar_type_node = NULL_TREE; + +/* Store all constructed constant CFStrings in a hash table so that + they get uniqued properly. */ + +struct cfstring_descriptor GTY(()) +{ + /* The literal argument . */ + tree literal; + + /* The resulting constant CFString. */ + tree constructor; +}; + +static GTY((param_is (struct cfstring_descriptor))) htab_t cfstring_htab; + +static hashval_t cfstring_hash (const void *); +static int cfstring_eq (const void *, const void *); + +void +darwin_init_cfstring_builtins (void) +{ + tree field, fields, pccfstring_ftype_pcchar; + /* APPLE LOCAL begin 3996036 */ + int save_warn_padded; + /* APPLE LOCAL end 3996036 */ + + /* struct __builtin_CFString { + const int *isa; (will point at + int flags; __CFConstantStringClassReference) + const char *str; + long length; + }; */ + + pcint_type_node + = build_pointer_type (build_qualified_type (integer_type_node, + TYPE_QUAL_CONST)); + pcchar_type_node + = build_pointer_type (build_qualified_type (char_type_node, + TYPE_QUAL_CONST)); + cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); + fields = build_decl (FIELD_DECL, NULL_TREE, pcint_type_node); + field = build_decl (FIELD_DECL, NULL_TREE, integer_type_node); + TREE_CHAIN (field) = fields; fields = field; + field = build_decl (FIELD_DECL, NULL_TREE, pcchar_type_node); + TREE_CHAIN (field) = fields; fields = field; + /* APPLE LOCAL radar 4493912 */ + field = build_decl (FIELD_DECL, NULL_TREE, long_integer_type_node); + TREE_CHAIN (field) = fields; fields = field; + /* NB: The finish_builtin_struct() routine expects FIELD_DECLs in + reverse order! */ + /* APPLE LOCAL begin 3996036 */ + save_warn_padded = warn_padded; + warn_padded = 0; + /* APPLE LOCAL end 3996036 */ + finish_builtin_struct (cfstring_type_node, "__builtin_CFString", + fields, NULL_TREE); + /* APPLE LOCAL begin 3996036 */ + warn_padded = save_warn_padded; + /* APPLE LOCAL end 3996036 */ + + /* const struct __builtin_CFstring * + __builtin___CFStringMakeConstantString (const char *); */ + + ccfstring_type_node + = build_qualified_type (cfstring_type_node, TYPE_QUAL_CONST); + pccfstring_type_node + = build_pointer_type (ccfstring_type_node); + pccfstring_ftype_pcchar + = build_function_type_list (pccfstring_type_node, + pcchar_type_node, NULL_TREE); + lang_hooks.builtin_function ("__builtin___CFStringMakeConstantString", + pccfstring_ftype_pcchar, + DARWIN_BUILTIN_CFSTRINGMAKECONSTANTSTRING, + BUILT_IN_NORMAL, NULL, NULL_TREE); + + /* extern int __CFConstantStringClassReference[]; */ + cfstring_class_reference + = build_decl (VAR_DECL, + get_identifier ("__CFConstantStringClassReference"), + build_array_type (integer_type_node, NULL_TREE)); + TREE_PUBLIC (cfstring_class_reference) = 1; + TREE_USED (cfstring_class_reference) = 1; + DECL_ARTIFICIAL (cfstring_class_reference) = 1; + (*lang_hooks.decls.pushdecl) (cfstring_class_reference); + DECL_EXTERNAL (cfstring_class_reference) = 1; + rest_of_decl_compilation (cfstring_class_reference, 0, 0); + + /* Initialize the hash table used to hold the constant CFString objects. */ + cfstring_htab = htab_create_ggc (31, cfstring_hash, + cfstring_eq, NULL); +} + +tree +darwin_expand_tree_builtin (tree function, tree params, + tree coerced_params ATTRIBUTE_UNUSED) +{ + unsigned int fcode = DECL_FUNCTION_CODE (function); + + switch (fcode) + { + case DARWIN_BUILTIN_CFSTRINGMAKECONSTANTSTRING: + if (!darwin_constant_cfstrings) + { + error ("built-in function `%s' requires `-fconstant-cfstrings' flag", + IDENTIFIER_POINTER (DECL_NAME (function))); + return error_mark_node; + } + + return darwin_build_constant_cfstring (TREE_VALUE (params)); + default: + break; + } + + return NULL_TREE; +} + +static hashval_t +cfstring_hash (const void *ptr) +{ + tree str = ((struct cfstring_descriptor *)ptr)->literal; + const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); + int i, len = TREE_STRING_LENGTH (str); + hashval_t h = len; + + for (i = 0; i < len; i++) + h = ((h * 613) + p[i]); + + return h; +} + +static int +cfstring_eq (const void *ptr1, const void *ptr2) +{ + tree str1 = ((struct cfstring_descriptor *)ptr1)->literal; + tree str2 = ((struct cfstring_descriptor *)ptr2)->literal; + int len1 = TREE_STRING_LENGTH (str1); + + return (len1 == TREE_STRING_LENGTH (str2) + && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), + len1)); +} + +tree +darwin_construct_objc_string (tree str) +{ + if (!darwin_constant_cfstrings) + /* APPLE LOCAL begin 4080358 */ + { + /* Even though we are not using CFStrings, place our literal + into the cfstring_htab hash table, so that the + darwin_constant_cfstring_p() function below will see it. */ + struct cfstring_descriptor key; + void **loc; + + key.literal = str; + loc = htab_find_slot (cfstring_htab, &key, INSERT); + + if (!*loc) + { + /* APPLE LOCAL radar 4563012 */ + *loc = ggc_alloc_cleared (sizeof (struct cfstring_descriptor)); + ((struct cfstring_descriptor *)*loc)->literal = str; + } + + return NULL_TREE; /* Fall back to NSConstantString. */ + } + + /* APPLE LOCAL end 4080358 */ + return darwin_build_constant_cfstring (str); +} + +bool +darwin_constant_cfstring_p (tree str) +{ + struct cfstring_descriptor key; + void **loc; + + if (!str) + return false; + + STRIP_NOPS (str); + + if (TREE_CODE (str) == ADDR_EXPR) + str = TREE_OPERAND (str, 0); + + if (TREE_CODE (str) != STRING_CST) + return false; + + key.literal = str; + loc = htab_find_slot (cfstring_htab, &key, NO_INSERT); + + if (loc) + return true; + + return false; +} + +static tree +darwin_build_constant_cfstring (tree str) +{ + struct cfstring_descriptor *desc, key; + void **loc; + tree addr; + + if (!str) + goto invalid_string; + + STRIP_NOPS (str); + + if (TREE_CODE (str) == ADDR_EXPR) + str = TREE_OPERAND (str, 0); + + if (TREE_CODE (str) != STRING_CST) + { + invalid_string: + error ("CFString literal expression is not constant"); + return error_mark_node; + } + + /* Perhaps we already constructed a constant CFString just like this one? */ + key.literal = str; + loc = htab_find_slot (cfstring_htab, &key, INSERT); + desc = *loc; + + if (!desc) + { + tree initlist, constructor, field = TYPE_FIELDS (ccfstring_type_node); + tree var; + int length = TREE_STRING_LENGTH (str) - 1; + /* FIXME: The CFString functionality should probably reside + in darwin-c.c. */ + extern tree pushdecl_top_level (tree); + /* APPLE LOCAL begin radar 2996215 */ + extern int isascii (int); + bool cvt_utf = false; + tree utf16_str = NULL_TREE; + const char *s = TREE_STRING_POINTER (str); + int l; + for (l = 0; l < length; l++) + if (!s[l] || !isascii (s[l])) + { + cvt_utf = true; + break; + } + if (cvt_utf) + { + size_t numUniChars; + const unsigned char *inbuf = (unsigned char *)TREE_STRING_POINTER (str); + utf16_str = create_init_utf16_var (inbuf, length, &numUniChars); + if (!utf16_str) + { + warning (0, "input conversion stopped due to an input byte " + "that does not belong to the input codeset UTF-8"); + cvt_utf = false; /* fall thru */ + } + else + length = (numUniChars >> 1); + } + /* APPLE LOCAL end radar 2996215 */ + *loc = desc = ggc_alloc (sizeof (*desc)); + desc->literal = str; + + initlist = build_tree_list + (field, build1 (ADDR_EXPR, pcint_type_node, + cfstring_class_reference)); + field = TREE_CHAIN (field); + /* APPLE LOCAL radar 2996215 */ + initlist = tree_cons (field, build_int_cst (NULL_TREE, utf16_str ? 0x000007d0 : 0x000007c8), + initlist); + field = TREE_CHAIN (field); + initlist = tree_cons (field, + build1 (ADDR_EXPR, pcchar_type_node, + /* APPLE LOCAL radar 2996215 */ + utf16_str ? utf16_str : str), initlist); + field = TREE_CHAIN (field); + /* APPLE LOCAL radar 4493912 */ + initlist = tree_cons (field, build_int_cst (TREE_TYPE (field), length), + initlist); + + constructor = build_constructor_from_list (ccfstring_type_node, + nreverse (initlist)); + TREE_READONLY (constructor) = 1; + TREE_CONSTANT (constructor) = 1; + TREE_STATIC (constructor) = 1; + + /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes + to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is + being built without any knowledge of C++ tree accessors; hence, we shall + use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ + if (darwin_running_cxx) + TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ + + /* Create an anonymous global variable for this CFString. */ + var = build_decl (CONST_DECL, NULL, TREE_TYPE (constructor)); + DECL_INITIAL (var) = constructor; + TREE_STATIC (var) = 1; + pushdecl_top_level (var); + desc->constructor = var; + } + + addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); + TREE_CONSTANT (addr) = 1; + + return addr; +} +/* APPLE LOCAL end constant cfstrings */ + +/* APPLE LOCAL begin CW asm blocks */ +/* Assume labels like L_foo$stub etc in CW-style inline code are + intended to be taken as literal labels, and return the identifier, + otherwise return NULL signifying that we have no special + knowledge. */ +tree +darwin_iasm_special_label (tree id) +{ + const char *name = IDENTIFIER_POINTER (id); + + if (name[0] == 'L') + { + int len = strlen (name); + + if ((len > 5 && strcmp (name + len - 5, "$stub") == 0) + || (len > 9 && strcmp (name + len - 9, "$lazy_ptr") == 0) + || (len > 13 && strcmp (name + len - 13, "$non_lazy_ptr") == 0)) + return id; + } + + return NULL_TREE; +} +/* APPLE LOCAL end CW asm blocks */ + +#if 0 +/* See TARGET_ASM_OUTPUT_ANCHOR for why we can't do this yet. */ +/* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the + anchor relative to ".", the current section position. We cannot use + the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ + +void +darwin_asm_output_anchor (rtx symbol) +{ + fprintf (asm_out_file, "\t.set\t"); + assemble_name (asm_out_file, XSTR (symbol, 0)); + fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", + SYMBOL_REF_BLOCK_OFFSET (symbol)); +} +#endif + +/* Set the darwin specific attributes on TYPE. */ +void +darwin_set_default_type_attributes (tree type) +{ + if (darwin_ms_struct + && TREE_CODE (type) == RECORD_TYPE) + TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), + NULL_TREE, + TYPE_ATTRIBUTES (type)); +} + +/* True, iff we're generating code for loadable kernel extentions. */ + +bool +darwin_kextabi_p (void) { + /* APPLE LOCAL kext v2 */ + return TARGET_KEXTABI == 1; +} + +/* APPLE LOCAL begin kext v2 */ +#ifndef TARGET_SUPPORTS_KEXTABI1 +#define TARGET_SUPPORTS_KEXTABI1 0 +#endif +/* APPLE LOCAL end kext v2 */ + +void +darwin_override_options (void) +{ + /* APPLE LOCAL begin for iframework for 4.3 4094959 */ + /* Remove this: */ +#if 0 + if (flag_apple_kext && strcmp (lang_hooks.name, "GNU C++") != 0) + { + warning (0, "command line option %<-fapple-kext%> is only valid for C++"); + flag_apple_kext = 0; + } +#endif + /* APPLE LOCAL end for iframework for 4.3 4094959 */ + if (flag_mkernel || flag_apple_kext) + { + /* -mkernel implies -fapple-kext for C++ */ + if (strcmp (lang_hooks.name, "GNU C++") == 0) + flag_apple_kext = 1; + + flag_no_common = 1; + + /* No EH in kexts. */ + flag_exceptions = 0; + /* APPLE LOCAL 5628030 */ + flag_asynchronous_unwind_tables = 0; + /* No -fnon-call-exceptions data in kexts. */ + flag_non_call_exceptions = 0; + /* APPLE LOCAL begin kext v2 */ + if (flag_apple_kext && + ! TARGET_SUPPORTS_KEXTABI1) + flag_apple_kext = 2; + /* APPLE LOCAL end kext v2 */ + } + /* APPLE LOCAL begin axe stubs 5571540 */ + /* APPLE LOCAL begin ARM 5683689 */ + + /* Go ahead and generate stubs for old systems, just in case. */ + if (darwin_macosx_version_min + && strverscmp (darwin_macosx_version_min, "10.5") < 0) + darwin_stubs = true; + /* APPLE LOCAL end ARM 5683689 */ + /* APPLE LOCAL end axe stubs 5571540 */ + /* APPLE LOCAL begin stack-protector default 5095227 */ + /* Default flag_stack_protect to 1 if on 10.5 or later for user code, + or 10.6 or later for code identified as part of the kernel. */ + if (flag_stack_protect == -1 + && darwin_macosx_version_min + && ((! flag_mkernel && ! flag_apple_kext + && strverscmp (darwin_macosx_version_min, "10.5") >= 0) + || strverscmp (darwin_macosx_version_min, "10.6") >= 0)) + flag_stack_protect = 1; + /* APPLE LOCAL end stack-protector default 5095227 */ +/* APPLE LOCAL diff confuses me */ +} +/* APPLE LOCAL begin radar 4985544 */ +bool +darwin_cfstring_type_node (tree type_node) +{ + return type_node == ccfstring_type_node; +} +/* APPLE LOCAL end radar 4985544 */ +#include "gt-darwin.h" |