/* Functions for generic Darwin as target machine for GNU C compiler.
- Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002
+ 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 GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+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.
-GNU CC is distributed in the hope that it will be useful,
+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 GNU CC; see the file COPYING. If not, write to
+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 "function.h"
#include "ggc.h"
#include "langhooks.h"
+#include "target.h"
#include "tm_p.h"
+#include "errors.h"
+#include "hashtab.h"
+
+/* 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 with versions of those functions and methods
+ from the newly compiled translation unit. The new functions access
+ the existing static data from the old translation unit, if the data
+ existed in the unit to be replaced, and from the new translation
+ unit, for new data.
+
+ The changes are to insert 5 nops at the beginning of all functions
+ and to use indirection to get at static duration data. 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
+ duration data from the newly loaded translation unit to the
+ existing data, if any. @code{static} data is special and is
+ handled by setting the second word in the .non_lazy_symbol_pointer
+ data structure to the address of the data. 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} data indirection. */
+
-static int machopic_data_defined_p PARAMS ((const char *));
-static void update_non_lazy_ptrs PARAMS ((const char *));
-static void update_stubs PARAMS ((const char *));
+/* Nonzero if the user passes the -mone-byte-bool switch, which forces
+ sizeof(bool) to be 1. */
+const char *darwin_one_byte_bool = 0;
int
-name_needs_quotes (name)
- const char *name;
+name_needs_quotes (const char *name)
{
int c;
while ((c = *name++) != '\0')
- if (! ISIDNUM (c))
+ if (! ISIDNUM (c) && c != '.' && c != '$')
return 1;
return 0;
}
-/*
- * flag_pic = 1 ... generate only indirections
- * flag_pic = 2 ... generate indirections and pure code
- */
+/* Return true if SYM_REF can be used without an indirection. */
+static 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;
+ }
+ return true;
+ }
+ return false;
+}
/* This module assumes that (const (symbol_ref "foo")) is a legal pic
reference, which will not be changed. */
-static GTY(()) tree machopic_defined_list;
-
enum machopic_addr_class
-machopic_classify_ident (ident)
- tree ident;
+machopic_classify_symbol (rtx sym_ref)
{
- const char *name = IDENTIFIER_POINTER (ident);
- int lprefix = (((name[0] == '*' || name[0] == '&')
- && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L')))
- || ( name[0] == '_'
- && name[1] == 'O'
- && name[2] == 'B'
- && name[3] == 'J'
- && name[4] == 'C'
- && name[5] == '_'));
- tree temp;
-
- if (name[0] != '!')
- {
- /* Here if no special encoding to be found. */
- if (lprefix)
- {
- const char *name = IDENTIFIER_POINTER (ident);
- int len = strlen (name);
+ 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);
+}
- if ((len > 5 && !strcmp (name + len - 5, "$stub"))
- || (len > 6 && !strcmp (name + len - 6, "$stub\"")))
- return MACHOPIC_DEFINED_FUNCTION;
- return MACHOPIC_DEFINED_DATA;
- }
+#ifndef TARGET_FIX_AND_CONTINUE
+#define TARGET_FIX_AND_CONTINUE 0
+#endif
- for (temp = machopic_defined_list;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- {
- if (ident == TREE_VALUE (temp))
- return MACHOPIC_DEFINED_DATA;
- }
+/* 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. */
- if (TREE_ASM_WRITTEN (ident))
- return MACHOPIC_DEFINED_DATA;
+static int
+indirect_data (rtx sym_ref)
+{
+ int lprefix;
+ const char *name;
- return MACHOPIC_UNDEFINED;
- }
+ /* If we aren't generating fix-and-continue code, don't do anything special. */
+ if (TARGET_FIX_AND_CONTINUE == 0)
+ return 0;
- else if (name[1] == 'D')
- return MACHOPIC_DEFINED_DATA;
+ /* 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. */
- else if (name[1] == 'T')
- return MACHOPIC_DEFINED_FUNCTION;
+ name = XSTR (sym_ref, 0);
- /* It is possible that someone is holding a "stale" name, which has
- since been defined. See if there is a "defined" name (i.e,
- different from NAME only in having a '!D_' or a '!T_' instead of
- a '!d_' or '!t_' prefix) in the identifier hash tables. If so, say
- that this identifier is defined. */
- else if (name[1] == 'd' || name[1] == 't')
- {
- char *new_name;
- new_name = (char *)alloca (strlen (name) + 1);
- strcpy (new_name, name);
- new_name[1] = (name[1] == 'd') ? 'D' : 'T';
- if (maybe_get_identifier (new_name) != NULL)
- return (name[1] == 'd') ? MACHOPIC_DEFINED_DATA
- : MACHOPIC_DEFINED_FUNCTION;
- }
+ lprefix = (((name[0] == '*' || name[0] == '&')
+ && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L')))
+ || (strncmp (name, "_OBJC_", 6) == 0));
- for (temp = machopic_defined_list; temp != NULL_TREE; temp = TREE_CHAIN (temp))
- {
- if (ident == TREE_VALUE (temp))
- {
- if (name[1] == 'T')
- return MACHOPIC_DEFINED_FUNCTION;
- else
- return MACHOPIC_DEFINED_DATA;
- }
- }
-
- if (name[1] == 't' || name[1] == 'T')
- {
- if (lprefix)
- return MACHOPIC_DEFINED_FUNCTION;
- else
- return MACHOPIC_UNDEFINED_FUNCTION;
- }
- else
- {
- if (lprefix)
- return MACHOPIC_DEFINED_DATA;
- else
- return MACHOPIC_UNDEFINED_DATA;
- }
+ return ! lprefix;
}
-
-enum machopic_addr_class
-machopic_classify_name (name)
- const char *name;
-{
- return machopic_classify_ident (get_identifier (name));
-}
-
-int
-machopic_ident_defined_p (ident)
- tree ident;
-{
- switch (machopic_classify_ident (ident))
- {
- case MACHOPIC_UNDEFINED:
- case MACHOPIC_UNDEFINED_DATA:
- case MACHOPIC_UNDEFINED_FUNCTION:
- return 0;
- default:
- return 1;
- }
-}
static int
-machopic_data_defined_p (name)
- const char *name;
+machopic_data_defined_p (rtx sym_ref)
{
- switch (machopic_classify_ident (get_identifier (name)))
+ 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;
}
}
-int
-machopic_name_defined_p (name)
- const char *name;
-{
- return machopic_ident_defined_p (get_identifier (name));
-}
-
-void
-machopic_define_ident (ident)
- tree ident;
-{
- if (!machopic_ident_defined_p (ident))
- machopic_defined_list =
- tree_cons (NULL_TREE, ident, machopic_defined_list);
-}
-
void
-machopic_define_name (name)
- const char *name;
+machopic_define_symbol (rtx mem)
{
- machopic_define_ident (get_identifier (name));
+ rtx sym_ref;
+ if (GET_CODE (mem) != MEM)
+ abort ();
+ sym_ref = XEXP (mem, 0);
+ SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED;
}
-/* This is a static to make inline functions work. The rtx
- representing the PIC base symbol always points to here. */
-
-static char function_base[32];
-
-static int current_pic_label_num;
+static GTY(()) char * function_base;
const char *
-machopic_function_base_name ()
+machopic_function_base_name (void)
{
- static const char *name = NULL;
- static const char *current_name;
-
- current_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
+ /* if dynamic-no-pic is on, we should not get here */
+ if (MACHO_DYNAMIC_NO_PIC_P)
+ abort ();
- if (name != current_name)
- {
- current_function_uses_pic_offset_table = 1;
-
- /* Save mucho space and time. Some of the C++ mangled names are over
- 700 characters long! Note that we produce a label containing a '-'
- if the function we're compiling is an Objective-C method, as evinced
- by the incredibly scientific test below. This is because code in
- rs6000.c makes the same ugly test when loading the PIC reg. */
-
- ++current_pic_label_num;
- if (*current_name == '+' || *current_name == '-')
- sprintf (function_base, "*\"L-%d$pb\"", current_pic_label_num);
- else
- sprintf (function_base, "*L%d$pb", current_pic_label_num);
+ if (function_base == NULL)
+ function_base =
+ (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>"));
- name = current_name;
- }
+ current_function_uses_pic_offset_table = 1;
return function_base;
}
-static GTY(()) tree machopic_non_lazy_pointers;
+/* Return a SYMBOL_REF for the PIC function base. */
-/* Return a non-lazy pointer name corresponding to the given name,
- either by finding it in our list of pointer names, or by generating
- a new one. */
-
-const char *
-machopic_non_lazy_ptr_name (name)
- const char *name;
+rtx
+machopic_function_base_sym (void)
{
- const char *temp_name;
- tree temp, ident = get_identifier (name);
-
- for (temp = machopic_non_lazy_pointers;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- {
- if (ident == TREE_VALUE (temp))
- return IDENTIFIER_POINTER (TREE_PURPOSE (temp));
- }
+ rtx sym_ref;
- name = darwin_strip_name_encoding (name);
+ sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ());
+ SYMBOL_REF_FLAGS (sym_ref)
+ |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED);
+ return sym_ref;
+}
- /* Try again, but comparing names this time. */
- for (temp = machopic_non_lazy_pointers;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
+static GTY(()) const char * function_base_func_name;
+static GTY(()) int current_pic_label_num;
+
+void
+machopic_output_function_base_name (FILE *file)
+{
+ const char *current_name;
+
+ /* If dynamic-no-pic is on, we should not get here. */
+ if (MACHO_DYNAMIC_NO_PIC_P)
+ abort ();
+ current_name =
+ IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
+ if (function_base_func_name != current_name)
{
- if (TREE_VALUE (temp))
- {
- temp_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
- temp_name = darwin_strip_name_encoding (temp_name);
- if (strcmp (name, temp_name) == 0)
- return IDENTIFIER_POINTER (TREE_PURPOSE (temp));
- }
+ ++current_pic_label_num;
+ function_base_func_name = current_name;
}
+ fprintf (file, "\"L%011d$pb\"", current_pic_label_num);
+}
- {
- char *buffer;
- tree ptr_name;
-
- buffer = alloca (strlen (name) + 20);
-
- strcpy (buffer, "&L");
- if (name[0] == '*')
- strcat (buffer, name+1);
- else
- {
- strcat (buffer, "_");
- strcat (buffer, name);
- }
-
- strcat (buffer, "$non_lazy_ptr");
- ptr_name = get_identifier (buffer);
+/* The suffix attached to non-lazy pointer symbols. */
+#define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr"
+/* The suffix attached to stub symbols. */
+#define STUB_SUFFIX "$stub"
- machopic_non_lazy_pointers
- = tree_cons (ptr_name, ident, machopic_non_lazy_pointers);
+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;
+} 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;
+
+/* 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);
+}
- TREE_USED (machopic_non_lazy_pointers) = 0;
+/* Returns true if the KEY is the same as that associated with
+ SLOT. */
- return IDENTIFIER_POINTER (ptr_name);
- }
+static int
+machopic_indirection_eq (const void *slot, const void *key)
+{
+ return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0;
}
-static GTY(()) tree machopic_stubs;
-
-/* Return the name of the stub corresponding to the given name,
- generating a new stub name if necessary. */
+/* 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_stub_name (name)
- const char *name;
+const char *
+machopic_indirection_name (rtx sym_ref, bool stub_p)
{
- tree temp, ident = get_identifier (name);
- const char *tname;
+ char *buffer;
+ const char *name = XSTR (sym_ref, 0);
+ size_t namelen = strlen (name);
+ machopic_indirection *p;
+ void ** slot;
+
+ /* Construct the name of the non-lazy pointer or stub. */
+ if (stub_p)
+ {
+ int needs_quotes = name_needs_quotes (name);
+ buffer = alloca (strlen ("&L")
+ + namelen
+ + strlen (STUB_SUFFIX)
+ + 2 /* possible quotes */
+ + 1 /* '\0' */);
+
+ if (needs_quotes)
+ {
+ if (name[0] == '*')
+ sprintf (buffer, "&\"L%s" STUB_SUFFIX "\"", name + 1);
+ else
+ sprintf (buffer, "&\"L%s%s" STUB_SUFFIX "\"", user_label_prefix,
+ name);
+ }
+ else if (name[0] == '*')
+ sprintf (buffer, "&L%s" STUB_SUFFIX, name + 1);
+ else
+ sprintf (buffer, "&L%s%s" STUB_SUFFIX, user_label_prefix, name);
+ }
+ else
+ {
+ buffer = alloca (strlen ("&L")
+ + strlen (user_label_prefix)
+ + namelen
+ + strlen (NON_LAZY_POINTER_SUFFIX)
+ + 1 /* '\0' */);
+ if (name[0] == '*')
+ sprintf (buffer, "&L%s" NON_LAZY_POINTER_SUFFIX, name + 1);
+ else
+ sprintf (buffer, "&L%s%s" NON_LAZY_POINTER_SUFFIX,
+ user_label_prefix, name);
+ }
- for (temp = machopic_stubs;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
+ 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)
{
- if (ident == TREE_VALUE (temp))
- return IDENTIFIER_POINTER (TREE_PURPOSE (temp));
- tname = IDENTIFIER_POINTER (TREE_VALUE (temp));
- if (strcmp (name, tname) == 0)
- return IDENTIFIER_POINTER (TREE_PURPOSE (temp));
- /* A library call name might not be section-encoded yet, so try
- it against a stripped name. */
- if (name[0] != '!'
- && tname[0] == '!'
- && strcmp (name, tname + 4) == 0)
- return IDENTIFIER_POINTER (TREE_PURPOSE (temp));
+ 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;
+ *slot = p;
+ }
+
+ return p->ptr_name;
+}
- name = darwin_strip_name_encoding (name);
-
- {
- char *buffer;
- tree ptr_name;
- int needs_quotes = name_needs_quotes (name);
-
- buffer = alloca (strlen (name) + 20);
-
- if (needs_quotes)
- strcpy (buffer, "&\"L");
- else
- strcpy (buffer, "&L");
- if (name[0] == '*')
- {
- strcat (buffer, name+1);
- }
- else
- {
- strcat (buffer, "_");
- strcat (buffer, name);
- }
-
- if (needs_quotes)
- strcat (buffer, "$stub\"");
- else
- strcat (buffer, "$stub");
- ptr_name = get_identifier (buffer);
-
- machopic_stubs = tree_cons (ptr_name, ident, machopic_stubs);
- TREE_USED (machopic_stubs) = 0;
-
- return IDENTIFIER_POINTER (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);
}
+/* 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 (name, validate_stub)
- const char *name;
- int validate_stub;
+machopic_validate_stub_or_non_lazy_ptr (const char *name)
{
- const char *real_name;
- tree temp, ident = get_identifier (name), id2;
+ 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;
- for (temp = (validate_stub ? machopic_stubs : machopic_non_lazy_pointers);
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- if (ident == TREE_PURPOSE (temp))
- {
- /* Mark both the stub or non-lazy pointer as well as the
- original symbol as being referenced. */
- TREE_USED (temp) = 1;
- if (TREE_CODE (TREE_VALUE (temp)) == IDENTIFIER_NODE)
- TREE_SYMBOL_REFERENCED (TREE_VALUE (temp)) = 1;
- real_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
- real_name = darwin_strip_name_encoding (real_name);
- id2 = maybe_get_identifier (real_name);
- if (id2)
- TREE_SYMBOL_REFERENCED (id2) = 1;
- }
+ /* 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 (orig, reg)
- rtx orig, reg;
+machopic_indirect_data_reference (rtx orig, rtx reg)
{
rtx ptr_ref = orig;
-
+
if (! MACHOPIC_INDIRECT)
return orig;
if (GET_CODE (orig) == SYMBOL_REF)
{
- const char *name = XSTR (orig, 0);
+ int defined = machopic_data_defined_p (orig);
- if (machopic_data_defined_p (name))
+ if (defined && MACHO_DYNAMIC_NO_PIC_P)
+ {
+#if defined (TARGET_TOC)
+ emit_insn (gen_macho_high (reg, orig));
+ emit_insn (gen_macho_low (reg, reg, orig));
+#else
+ /* some other cpu -- writeme! */
+ abort ();
+#endif
+ return reg;
+ }
+ else if (defined)
{
#if defined (TARGET_TOC) || defined (HAVE_lo_sum)
- rtx pic_base = gen_rtx (SYMBOL_REF, Pmode,
- machopic_function_base_name ());
- rtx offset = gen_rtx (CONST, Pmode,
- gen_rtx (MINUS, Pmode, orig, pic_base));
+ rtx pic_base = machopic_function_base_sym ();
+ rtx offset = gen_rtx_CONST (Pmode,
+ gen_rtx_MINUS (Pmode, orig, pic_base));
#endif
#if defined (TARGET_TOC) /* i.e., PowerPC */
- rtx hi_sum_reg = reg;
+ rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode));
if (reg == NULL)
abort ();
- 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)));
+ 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)
if (reg == 0) abort ();
- 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,
- gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)));
+ 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);
+ orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg);
#endif
#endif
return orig;
}
- ptr_ref = gen_rtx (SYMBOL_REF, Pmode,
- machopic_non_lazy_ptr_name (name));
+ ptr_ref = (gen_rtx_SYMBOL_REF
+ (Pmode,
+ machopic_indirection_name (orig, /*stub_p=*/false)));
- ptr_ref = gen_rtx_MEM (Pmode, ptr_ref);
- RTX_UNCHANGING_P (ptr_ref) = 1;
+ SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig);
+
+ ptr_ref = gen_const_mem (Pmode, ptr_ref);
+ machopic_define_symbol (ptr_ref);
return ptr_ref;
}
orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1),
(base == reg ? 0 : reg));
}
- else
+ else
return orig;
if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT)
result = plus_constant (base, INTVAL (orig));
else
- result = gen_rtx (PLUS, Pmode, base, orig);
+ result = gen_rtx_PLUS (Pmode, base, orig);
if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM)
{
corresponding symbol_stub if necessary. Return a new MEM. */
rtx
-machopic_indirect_call_target (target)
- rtx target;
+machopic_indirect_call_target (rtx target)
{
if (GET_CODE (target) != MEM)
return target;
- if (MACHOPIC_INDIRECT && GET_CODE (XEXP (target, 0)) == SYMBOL_REF)
- {
- enum machine_mode mode = GET_MODE (XEXP (target, 0));
- const char *name = XSTR (XEXP (target, 0), 0);
-
- /* If the name is already defined, we need do nothing. */
- if (name[0] == '!' && name[1] == 'T')
- return target;
-
- if (!machopic_name_defined_p (name))
- {
- const char *stub_name = machopic_stub_name (name);
-
- XEXP (target, 0) = gen_rtx (SYMBOL_REF, mode, stub_name);
- RTX_UNCHANGING_P (target) = 1;
- }
+ if (MACHOPIC_INDIRECT
+ && GET_CODE (XEXP (target, 0)) == SYMBOL_REF
+ && !(SYMBOL_REF_FLAGS (XEXP (target, 0))
+ & MACHO_SYMBOL_FLAG_DEFINED))
+ {
+ rtx sym_ref = XEXP (target, 0);
+ const char *stub_name = machopic_indirection_name (sym_ref,
+ /*stub_p=*/true);
+ enum machine_mode mode = GET_MODE (sym_ref);
+ tree decl = SYMBOL_REF_DECL (sym_ref);
+
+ XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name);
+ SYMBOL_REF_DECL (XEXP (target, 0)) = decl;
+ MEM_READONLY_P (target) = 1;
+ MEM_NOTRAP_P (target) = 1;
}
return target;
}
rtx
-machopic_legitimize_pic_address (orig, mode, reg)
- rtx orig, reg;
- enum machine_mode mode;
+machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
{
rtx pic_ref = orig;
- if (! MACHOPIC_PURE)
+ if (! MACHOPIC_INDIRECT)
return orig;
/* First handle a simple SYMBOL_REF or LABEL_REF */
orig = machopic_indirect_data_reference (orig, reg);
- if (GET_CODE (orig) == PLUS
+ if (GET_CODE (orig) == PLUS
&& GET_CODE (XEXP (orig, 0)) == REG)
{
if (reg == 0)
emit_move_insn (reg, orig);
return reg;
- }
+ }
- pic_base = gen_rtx (SYMBOL_REF, Pmode, machopic_function_base_name ());
+ /* if dynamic-no-pic then use 0 as the pic base */
+ if (MACHO_DYNAMIC_NO_PIC_P)
+ pic_base = CONST0_RTX (Pmode);
+ else
+ pic_base = machopic_function_base_sym ();
if (GET_CODE (orig) == MEM)
{
else
reg = gen_reg_rtx (Pmode);
}
-
+
#ifdef HAVE_lo_sum
- if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF
+ 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 */
+ abort ();
+#endif
+ pic_ref = reg;
+ }
+ else
+ if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (orig, 0)) == LABEL_REF)
{
- rtx offset = gen_rtx (CONST, Pmode,
- gen_rtx (MINUS, Pmode,
- XEXP (orig, 0), pic_base));
+ rtx offset = gen_rtx_CONST (Pmode,
+ gen_rtx_MINUS (Pmode,
+ 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 =
- (reload_in_progress ? reg : gen_reg_rtx (SImode));
-
- 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, VOIDmode, reg,
- gen_rtx (MEM, GET_MODE (orig),
- gen_rtx (LO_SUM, Pmode,
- hi_sum_reg, offset))));
- pic_ref = reg;
+ 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);
+ 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
pic = reg;
}
#if 0
- emit_insn (gen_rtx (USE, VOIDmode,
- gen_rtx (REG, Pmode, PIC_OFFSET_TABLE_REGNUM)));
+ emit_insn (gen_rtx_USE (VOIDmode,
+ gen_rtx_REG (Pmode,
+ PIC_OFFSET_TABLE_REGNUM)));
#endif
- pic_ref = gen_rtx (PLUS, Pmode,
- pic,
- gen_rtx (CONST, Pmode,
- gen_rtx (MINUS, Pmode,
- XEXP (orig, 0),
- pic_base)));
+ pic_ref = gen_rtx_PLUS (Pmode,
+ pic,
+ gen_rtx_CONST (Pmode,
+ gen_rtx_MINUS (Pmode,
+ XEXP (orig, 0),
+ pic_base)));
}
-
+
#if !defined (TARGET_TOC)
emit_move_insn (reg, pic_ref);
- pic_ref = gen_rtx (MEM, GET_MODE (orig), reg);
+ pic_ref = gen_const_mem (GET_MODE (orig), reg);
#endif
- RTX_UNCHANGING_P (pic_ref) = 1;
}
else
{
#ifdef HAVE_lo_sum
- if (GET_CODE (orig) == SYMBOL_REF
+ if (GET_CODE (orig) == SYMBOL_REF
|| GET_CODE (orig) == LABEL_REF)
{
- rtx offset = gen_rtx (CONST, Pmode,
- gen_rtx (MINUS, Pmode, orig, pic_base));
+ rtx offset = gen_rtx_CONST (Pmode,
+ gen_rtx_MINUS (Pmode,
+ orig, pic_base));
#if defined (TARGET_TOC) /* i.e., PowerPC */
rtx hi_sum_reg;
if (reload_in_progress)
abort ();
else
- reg = gen_reg_rtx (SImode);
+ reg = gen_reg_rtx (Pmode);
}
-
+
hi_sum_reg = 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, VOIDmode, reg,
- gen_rtx (LO_SUM, Pmode,
- hi_sum_reg, offset)));
+ 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;
- RTX_UNCHANGING_P (pic_ref) = 1;
#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);
- RTX_UNCHANGING_P (pic_ref) = 1;
+ 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 (GET_CODE (orig) == REG)
+ if (REG_P (orig)
+ || GET_CODE (orig) == SUBREG)
{
return orig;
}
pic = reg;
}
#if 0
- emit_insn (gen_rtx (USE, VOIDmode,
- pic_offset_table_rtx));
+ emit_insn (gen_rtx_USE (VOIDmode,
+ pic_offset_table_rtx));
#endif
- pic_ref = gen_rtx (PLUS, Pmode,
- pic,
- gen_rtx (CONST, Pmode,
- gen_rtx (MINUS, Pmode,
- orig, pic_base)));
+ pic_ref = gen_rtx_PLUS (Pmode,
+ pic,
+ gen_rtx_CONST (Pmode,
+ gen_rtx_MINUS (Pmode,
+ orig, pic_base)));
}
}
}
|| 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);
is_complex = 1;
}
else
- pic_ref = gen_rtx (PLUS, Pmode, base, orig);
-
- if (RTX_UNCHANGING_P (base) && RTX_UNCHANGING_P (orig))
- RTX_UNCHANGING_P (pic_ref) = 1;
+ pic_ref = gen_rtx_PLUS (Pmode, base, orig);
if (reg && is_complex)
{
&& GET_CODE (XEXP (orig, 0)) == SYMBOL_REF)
{
rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg);
-
- addr = gen_rtx (MEM, GET_MODE (orig), addr);
- RTX_UNCHANGING_P (addr) = RTX_UNCHANGING_P (orig);
+ 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. */
-void
-machopic_finish (asm_out_file)
- FILE *asm_out_file;
+static int
+machopic_output_indirection (void **slot, void *data)
{
- tree temp;
+ machopic_indirection *p = *((machopic_indirection **) slot);
+ FILE *asm_out_file = (FILE *) data;
+ rtx symbol;
+ const char *sym_name;
+ const char *ptr_name;
+
+ if (!p->used)
+ return 1;
- for (temp = machopic_stubs;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
+ symbol = p->symbol;
+ sym_name = XSTR (symbol, 0);
+ ptr_name = p->ptr_name;
+
+ if (p->stub_p)
{
- const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
- const char *stub_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp));
char *sym;
char *stub;
- if (! TREE_USED (temp))
- continue;
-
- /* If the symbol is actually defined, we don't need a stub. */
- if (sym_name[0] == '!' && sym_name[1] == 'T')
- continue;
-
- sym_name = darwin_strip_name_encoding (sym_name);
-
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);
+ strcpy (sym, sym_name);
else
- sym[0] = '_', strcpy (sym + 1, sym_name);
+ sprintf (sym, "%s%s", user_label_prefix, sym_name);
- stub = alloca (strlen (stub_name) + 2);
- if (stub_name[0] == '*' || stub_name[0] == '&')
- strcpy (stub, stub_name + 1);
+ stub = alloca (strlen (ptr_name) + 2);
+ if (ptr_name[0] == '*' || ptr_name[0] == '&')
+ strcpy (stub, ptr_name + 1);
else
- stub[0] = '_', strcpy (stub + 1, stub_name);
+ sprintf (stub, "%s%s", user_label_prefix, ptr_name);
machopic_output_stub (asm_out_file, sym, stub);
}
-
- for (temp = machopic_non_lazy_pointers;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
+ else if (! indirect_data (symbol)
+ && (machopic_symbol_defined_p (symbol)
+ || SYMBOL_REF_LOCAL_P (symbol)))
{
- const char *const sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
- const char *const lazy_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp));
-
- if (! TREE_USED (temp))
- continue;
-
- if (machopic_ident_defined_p (TREE_VALUE (temp)))
- {
- data_section ();
- assemble_align (GET_MODE_ALIGNMENT (Pmode));
- assemble_label (lazy_name);
- assemble_integer (gen_rtx (SYMBOL_REF, Pmode, sym_name),
- GET_MODE_SIZE (Pmode),
- GET_MODE_ALIGNMENT (Pmode), 1);
- }
- else
- {
- machopic_nl_symbol_ptr_section ();
- assemble_name (asm_out_file, lazy_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");
+ 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;
- assemble_integer (const0_rtx, GET_MODE_SIZE (Pmode),
- GET_MODE_ALIGNMENT (Pmode), 1);
- }
+ 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
+ data. */
+
+ 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);
}
+
+ return 1;
}
-int
-machopic_operand_p (op)
- rtx op;
+void
+machopic_finish (FILE *asm_out_file)
+{
+ if (machopic_indirections)
+ htab_traverse_noresize (machopic_indirections,
+ machopic_output_indirection,
+ asm_out_file);
+}
+
+int
+machopic_operand_p (rtx op)
{
if (MACHOPIC_JUST_INDIRECT)
{
op = XEXP (op, 0);
if (GET_CODE (op) == SYMBOL_REF)
- return machopic_name_defined_p (XSTR (op, 0));
+ return machopic_symbol_defined_p (op);
else
return 0;
}
if (GET_CODE (op) == MINUS
&& GET_CODE (XEXP (op, 0)) == SYMBOL_REF
&& GET_CODE (XEXP (op, 1)) == SYMBOL_REF
- && machopic_name_defined_p (XSTR (XEXP (op, 0), 0))
- && machopic_name_defined_p (XSTR (XEXP (op, 1), 0)))
+ && machopic_symbol_defined_p (XEXP (op, 0))
+ && machopic_symbol_defined_p (XEXP (op, 1)))
return 1;
return 0;
use later. */
void
-darwin_encode_section_info (decl, first)
- tree decl;
- int first ATTRIBUTE_UNUSED;
+darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED)
{
- char code = '\0';
- int defined = 0;
rtx sym_ref;
- const char *orig_str;
- char *new_str;
- size_t len, new_len;
-
- if ((TREE_CODE (decl) == FUNCTION_DECL
- || TREE_CODE (decl) == VAR_DECL)
- && !DECL_EXTERNAL (decl)
- && ((TREE_STATIC (decl)
- && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl)))
- || (DECL_INITIAL (decl)
- && DECL_INITIAL (decl) != error_mark_node)))
- defined = 1;
- if (TREE_CODE (decl) == FUNCTION_DECL)
- code = (defined ? 'T' : 't');
- else if (TREE_CODE (decl) == VAR_DECL)
- code = (defined ? 'D' : 'd');
+ /* Do the standard encoding things first. */
+ default_encode_section_info (decl, rtl, first);
- if (code == '\0')
+ if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
return;
- sym_ref = XEXP (DECL_RTL (decl), 0);
- orig_str = XSTR (sym_ref, 0);
- len = strlen (orig_str) + 1;
-
- if (orig_str[0] == '!')
- {
- /* Already encoded; see if we need to change it. */
- if (code == orig_str[1])
- return;
- /* Yes, tweak a copy of the name and put it in a new string. */
- new_str = alloca (len);
- memcpy (new_str, orig_str, len);
- new_str[1] = code;
- XSTR (sym_ref, 0) = ggc_alloc_string (new_str, len);
- }
- else
- {
- /* Add the encoding. */
- new_len = len + 4;
- new_str = alloca (new_len);
- new_str[0] = '!';
- new_str[1] = code;
- new_str[2] = '_';
- new_str[3] = '_';
- memcpy (new_str + 4, orig_str, len);
- XSTR (sym_ref, 0) = ggc_alloc_string (new_str, new_len);
- }
- /* The non-lazy pointer list may have captured references to the
- old encoded name, change them. */
+ sym_ref = XEXP (rtl, 0);
if (TREE_CODE (decl) == VAR_DECL)
- update_non_lazy_ptrs (XSTR (sym_ref, 0));
- else
- update_stubs (XSTR (sym_ref, 0));
-}
-
-/* Undo the effects of the above. */
-
-const char *
-darwin_strip_name_encoding (str)
- const char *str;
-{
- return str[0] == '!' ? str + 4 : str;
-}
+ SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE;
-/* Scan the list of non-lazy pointers and update any recorded names whose
- stripped name matches the argument. */
-
-static void
-update_non_lazy_ptrs (name)
- const char *name;
-{
- const char *name1, *name2;
- tree temp;
-
- name1 = darwin_strip_name_encoding (name);
-
- for (temp = machopic_non_lazy_pointers;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- {
- const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
+ if (!DECL_EXTERNAL (decl)
+ && (!TREE_PUBLIC (decl) || !DECL_WEAK (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 (*sym_name == '!')
- {
- name2 = darwin_strip_name_encoding (sym_name);
- if (strcmp (name1, name2) == 0)
- {
- IDENTIFIER_POINTER (TREE_VALUE (temp)) = name;
- break;
- }
- }
- }
+ if (TREE_CODE (decl) == VAR_DECL
+ && indirect_data (sym_ref)
+ && ! TREE_PUBLIC (decl))
+ SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC;
}
-/* Function NAME is being defined, and its label has just been output.
- If there's already a reference to a stub for this function, we can
- just emit the stub label now and we don't bother emitting the stub later. */
-
void
-machopic_output_possible_stub_label (file, name)
- FILE *file;
- const char *name;
+darwin_mark_decl_preserved (const char *name)
{
- tree temp;
-
-
- /* Ensure we're looking at a section-encoded name. */
- if (name[0] != '!' || (name[1] != 't' && name[1] != 'T'))
- return;
-
- for (temp = machopic_stubs;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- {
- const char *sym_name;
-
- sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
- if (sym_name[0] == '!' && sym_name[1] == 'T'
- && ! strcmp (name+2, sym_name+2))
- {
- ASM_OUTPUT_LABEL (file, IDENTIFIER_POINTER (TREE_PURPOSE (temp)));
- /* Avoid generating a stub for this. */
- TREE_USED (temp) = 0;
- break;
- }
- }
-}
-
-/* Scan the list of stubs and update any recorded names whose
- stripped name matches the argument. */
-
-static void
-update_stubs (name)
- const char *name;
-{
- const char *name1, *name2;
- tree temp;
-
- name1 = darwin_strip_name_encoding (name);
-
- for (temp = machopic_stubs;
- temp != NULL_TREE;
- temp = TREE_CHAIN (temp))
- {
- const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp));
-
- if (*sym_name == '!')
- {
- name2 = darwin_strip_name_encoding (sym_name);
- if (strcmp (name1, name2) == 0)
- {
- IDENTIFIER_POINTER (TREE_VALUE (temp)) = name;
- break;
- }
- }
- }
+ fprintf (asm_out_file, ".no_dead_strip ");
+ assemble_name (asm_out_file, name);
+ fputc ('\n', asm_out_file);
}
void
-machopic_select_section (exp, reloc, align)
- tree exp;
- int reloc;
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED;
+machopic_select_section (tree exp, int reloc,
+ unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
{
- if (TREE_CODE (exp) == STRING_CST)
- {
- if (flag_writable_strings)
- data_section ();
- else if (TREE_STRING_LENGTH (exp) !=
- strlen (TREE_STRING_POINTER (exp)) + 1)
- readonly_data_section ();
- else
- cstring_section ();
- }
- else if (TREE_CODE (exp) == INTEGER_CST
- || TREE_CODE (exp) == REAL_CST)
+ void (*base_function)(void);
+ bool weak_p = DECL_P (exp) && DECL_WEAK (exp);
+ static void (* const base_funs[][2])(void) = {
+ { text_section, text_coal_section },
+ { unlikely_text_section, text_unlikely_coal_section },
+ { readonly_data_section, const_coal_section },
+ { const_data_section, const_data_coal_section },
+ { data_section, data_coal_section }
+ };
+
+ if (reloc == 0
+ && (last_text_section == in_text_unlikely
+ || last_text_section == in_text_unlikely_coal))
+ reloc = 1;
+
+ if (TREE_CODE (exp) == FUNCTION_DECL)
+ base_function = base_funs[reloc][weak_p];
+ else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT))
+ base_function = base_funs[2][weak_p];
+ else if (TREE_READONLY (exp) || TREE_CONSTANT (exp))
+ base_function = base_funs[3][weak_p];
+ else
+ base_function = base_funs[4][weak_p];
+
+ if (TREE_CODE (exp) == STRING_CST
+ && ((size_t) TREE_STRING_LENGTH (exp)
+ == strlen (TREE_STRING_POINTER (exp)) + 1))
+ cstring_section ();
+ else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST)
+ && flag_merge_constants)
{
- tree size = TYPE_SIZE (TREE_TYPE (exp));
+ 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)
literal8_section ();
else
- readonly_data_section ();
+ base_function ();
}
else if (TREE_CODE (exp) == CONSTRUCTOR
&& TREE_TYPE (exp)
objc_constant_string_object_section ();
else if (!strcmp (IDENTIFIER_POINTER (name), "NXConstantString"))
objc_string_object_section ();
- else if (TREE_READONLY (exp) || TREE_CONSTANT (exp))
- {
- if (TREE_SIDE_EFFECTS (exp) || (flag_pic && reloc))
- const_data_section ();
- else
- readonly_data_section ();
- }
else
- data_section ();
+ base_function ();
}
else if (TREE_CODE (exp) == VAR_DECL &&
DECL_NAME (exp) &&
objc_symbols_section ();
else if (!strncmp (name, "_OBJC_MODULES", 13))
objc_module_info_section ();
+ else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16))
+ objc_image_info_section ();
else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32))
objc_cat_inst_meth_section ();
else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29))
objc_cat_cls_meth_section ();
else if (!strncmp (name, "_OBJC_PROTOCOL_", 15))
objc_protocol_section ();
- else if ((TREE_READONLY (exp) || TREE_CONSTANT (exp))
- && !TREE_SIDE_EFFECTS (exp))
- {
- if (flag_pic && reloc)
- const_data_section ();
- else
- readonly_data_section ();
- }
else
- data_section ();
+ base_function ();
}
- else if (TREE_READONLY (exp) || TREE_CONSTANT (exp))
+ /* ::operator new and ::operator delete must be coalesced, even
+ if not weak. There are 8 variants that we look for. */
+ else if (TREE_CODE (exp) == FUNCTION_DECL
+ && ! DECL_ONE_ONLY (exp))
{
- if (TREE_SIDE_EFFECTS (exp) || (flag_pic && reloc))
- const_data_section ();
+ const char * name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (exp));
+ if (name[0] == '_' && name[1] == 'Z'
+ && ((name[2] == 'n' && (name[3] == 'a' || name[3] == 'w')
+ && name[4] == 'm')
+ || (name[2] == 'd' && (name[3] == 'a' || name[3] == 'l')
+ && name[4] == 'P' && name[5] == 'v')))
+ {
+ bool delete_p = name[2] == 'd';
+ if (name[5 + delete_p] == 0
+ || strcmp (name + 5 + delete_p, "KSt9nothrow_t") == 0)
+ base_funs[reloc][1] ();
+ else
+ base_function ();
+ }
else
- readonly_data_section ();
+ base_function ();
}
else
- data_section ();
+ base_function ();
}
/* This can be called with address expressions as "rtx".
They must go in "const". */
void
-machopic_select_rtx_section (mode, x, align)
- enum machine_mode mode;
- rtx x;
- unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED;
+machopic_select_rtx_section (enum machine_mode mode, rtx x,
+ unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
{
- if (GET_MODE_SIZE (mode) == 8)
+ if (GET_MODE_SIZE (mode) == 8
+ && (GET_CODE (x) == CONST_INT
+ || GET_CODE (x) == CONST_DOUBLE))
literal8_section ();
else if (GET_MODE_SIZE (mode) == 4
&& (GET_CODE (x) == CONST_INT
|| GET_CODE (x) == CONST_DOUBLE))
literal4_section ();
+ else if (MACHOPIC_INDIRECT
+ && (GET_CODE (x) == SYMBOL_REF
+ || GET_CODE (x) == CONST
+ || GET_CODE (x) == LABEL_REF))
+ const_data_section ();
else
const_section ();
}
void
-machopic_asm_out_constructor (symbol, priority)
- rtx symbol;
- int priority ATTRIBUTE_UNUSED;
+machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED)
{
- if (flag_pic)
+ if (MACHOPIC_INDIRECT)
mod_init_section ();
else
constructor_section ();
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
- if (!flag_pic)
+ if (! MACHOPIC_INDIRECT)
fprintf (asm_out_file, ".reference .constructors_used\n");
}
void
-machopic_asm_out_destructor (symbol, priority)
- rtx symbol;
- int priority ATTRIBUTE_UNUSED;
+machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED)
{
- if (flag_pic)
+ if (MACHOPIC_INDIRECT)
mod_term_section ();
else
destructor_section ();
assemble_align (POINTER_SIZE);
assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
- if (!flag_pic)
+ if (! MACHOPIC_INDIRECT)
fprintf (asm_out_file, ".reference .destructors_used\n");
}
void
-darwin_globalize_label (stream, name)
- FILE *stream;
- const char *name;
+darwin_globalize_label (FILE *stream, const char *name)
{
if (!!strncmp (name, "_OBJC_", 6))
default_globalize_label (stream, name);
}
+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 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)
+{
+ if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL)
+ {
+ warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else
+ declare_weak (*node);
+
+ return NULL_TREE;
+}
+
+static void
+no_dead_strip (FILE *file, const char *lab)
+{
+ fprintf (file, ".no_dead_strip %s\n", lab);
+}
+
+/* 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)
+{
+ tree id = DECL_ASSEMBLER_NAME (decl)
+ ? DECL_ASSEMBLER_NAME (decl)
+ : DECL_NAME (decl);
+
+ const char *prefix = "_";
+ const int prefix_len = 1;
+
+ const char *base = IDENTIFIER_POINTER (id);
+ unsigned int base_len = IDENTIFIER_LENGTH (id);
+
+ const char *suffix = ".eh";
+
+ int need_quotes = name_needs_quotes (base);
+ int quotes_len = need_quotes ? 2 : 0;
+ char *lab;
+
+ if (! for_eh)
+ suffix = ".eh1";
+
+ lab = xmalloc (prefix_len + base_len + strlen (suffix) + quotes_len + 1);
+ lab[0] = '\0';
+
+ if (need_quotes)
+ strcat(lab, "\"");
+ strcat(lab, prefix);
+ strcat(lab, base);
+ strcat(lab, suffix);
+ if (need_quotes)
+ strcat(lab, "\"");
+
+ if (TREE_PUBLIC (decl))
+ fprintf (file, "\t%s %s\n",
+ (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN
+ ? ".globl"
+ : ".private_extern"),
+ lab);
+
+ if (DECL_WEAK (decl))
+ fprintf (file, "\t.weak_definition %s\n", lab);
+
+ if (empty)
+ {
+ fprintf (file, "%s = 0\n", lab);
+
+ /* 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. */
+ no_dead_strip (file, lab);
+ }
+ else
+ fprintf (file, "%s:\n", lab);
+
+ free (lab);
+}
+
+/* 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;
+
+ if (GET_CODE (addr) != SYMBOL_REF)
+ abort ();
+
+ 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 ("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
static int darwin_dwarf_label_counter;
void
-darwin_asm_output_dwarf_delta (file, size, lab1, lab2)
- FILE *file;
- int size ATTRIBUTE_UNUSED;
- const char *lab1, *lab2;
+darwin_asm_output_dwarf_delta (FILE *file, int size,
+ const char *lab1, const char *lab2)
{
- const char *p = lab1 + (lab1[0] == '*');
- int islocaldiff = (p[0] == 'L');
+ 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$%d,", darwin_dwarf_label_counter);
else
- fprintf (file, "\t%s\t", ".long");
- assemble_name (file, lab1);
+ fprintf (file, "\t%s\t", directive);
+ assemble_name_raw (file, lab1);
fprintf (file, "-");
- assemble_name (file, lab2);
+ assemble_name_raw (file, lab2);
if (islocaldiff)
- fprintf (file, "\n\t.long L$set$%d", darwin_dwarf_label_counter++);
+ fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++);
}
-#include "gt-darwin.h"
+void
+darwin_file_end (void)
+{
+ machopic_finish (asm_out_file);
+ if (strcmp (lang_hooks.name, "GNU C++") == 0)
+ {
+ constructor_section ();
+ destructor_section ();
+ ASM_OUTPUT_ALIGN (asm_out_file, 1);
+ }
+ fprintf (asm_out_file, "\t.subsections_via_symbols\n");
+}
+
+/* True, iff we're generating fast turn around debugging code. When
+ true, we arrange for function prologues to start with 4 nops so
+ that gdb may insert code to redirect them, and for data to accessed
+ indirectly. The runtime uses this indirection to forward
+ references for data to the original instance of that data. */
+int darwin_fix_and_continue;
+const char *darwin_fix_and_continue_switch;
+
+#include "gt-darwin.h"
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