mirror of
https://sourceware.org/git/glibc.git
synced 2025-09-01 05:02:03 +03:00
Remove non-ELF support
This commit is contained in:
Ulrich Drepper
@@ -1,6 +1,6 @@
|
||||
/* Support macros for making weak and strong aliases for symbols,
|
||||
and for using symbol sets and linker warnings with GNU ld.
|
||||
Copyright (C) 1995-1998,2000-2006,2008,2009,2011
|
||||
Copyright (C) 1995-1998,2000-2006,2008,2009,2011,2012
|
||||
Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
@@ -32,7 +32,6 @@
|
||||
* ASM_GLOBAL_DIRECTIVE with `.globl' or `.global'.
|
||||
* ASM_TYPE_DIRECTIVE_PREFIX with `@' or `#' or whatever for .type,
|
||||
or leave it undefined if there is no .type directive.
|
||||
* HAVE_ELF if using ELF, which supports weak symbols using `.weak'.
|
||||
* HAVE_ASM_WEAK_DIRECTIVE if we have weak symbols using `.weak'.
|
||||
* HAVE_ASM_WEAKEXT_DIRECTIVE if we have weak symbols using `.weakext'.
|
||||
|
||||
@@ -54,8 +53,7 @@
|
||||
|
||||
#include <config.h>
|
||||
|
||||
/* The symbols in all the user (non-_) macros are C symbols.
|
||||
NO HAVE_ELF implies a.out. */
|
||||
/* The symbols in all the user (non-_) macros are C symbols. */
|
||||
|
||||
#if defined HAVE_ASM_WEAK_DIRECTIVE || defined HAVE_ASM_WEAKEXT_DIRECTIVE
|
||||
# define HAVE_WEAK_SYMBOLS
|
||||
@@ -222,51 +220,35 @@
|
||||
|
||||
/* When a reference to SYMBOL is encountered, the linker will emit a
|
||||
warning message MSG. */
|
||||
#ifdef HAVE_ELF
|
||||
|
||||
/* We want the .gnu.warning.SYMBOL section to be unallocated. */
|
||||
# ifdef HAVE_ASM_PREVIOUS_DIRECTIVE
|
||||
# define __make_section_unallocated(section_string) \
|
||||
#ifdef HAVE_ASM_PREVIOUS_DIRECTIVE
|
||||
# define __make_section_unallocated(section_string) \
|
||||
asm (".section " section_string "\n\t.previous");
|
||||
# elif defined HAVE_ASM_POPSECTION_DIRECTIVE
|
||||
# define __make_section_unallocated(section_string) \
|
||||
#elif defined HAVE_ASM_POPSECTION_DIRECTIVE
|
||||
# define __make_section_unallocated(section_string) \
|
||||
asm (".pushsection " section_string "\n\t.popsection");
|
||||
# else
|
||||
# define __make_section_unallocated(section_string)
|
||||
# endif
|
||||
#else
|
||||
# define __make_section_unallocated(section_string)
|
||||
#endif
|
||||
|
||||
/* Tacking on "\n\t#" to the section name makes gcc put it's bogus
|
||||
section attributes on what looks like a comment to the assembler. */
|
||||
# ifdef HAVE_SECTION_QUOTES
|
||||
# define __sec_comment "\"\n\t#\""
|
||||
# else
|
||||
# define __sec_comment "\n\t#"
|
||||
# endif
|
||||
# define link_warning(symbol, msg) \
|
||||
#ifdef HAVE_SECTION_QUOTES
|
||||
# define __sec_comment "\"\n\t#\""
|
||||
#else
|
||||
# define __sec_comment "\n\t#"
|
||||
#endif
|
||||
#define link_warning(symbol, msg) \
|
||||
__make_section_unallocated (".gnu.warning." #symbol) \
|
||||
static const char __evoke_link_warning_##symbol[] \
|
||||
__attribute__ ((used, section (".gnu.warning." #symbol __sec_comment))) \
|
||||
= msg;
|
||||
# define libc_freeres_ptr(decl) \
|
||||
#define libc_freeres_ptr(decl) \
|
||||
__make_section_unallocated ("__libc_freeres_ptrs, \"aw\", %nobits") \
|
||||
decl __attribute__ ((section ("__libc_freeres_ptrs" __sec_comment)))
|
||||
# define __libc_freeres_fn_section \
|
||||
#define __libc_freeres_fn_section \
|
||||
__attribute__ ((section ("__libc_freeres_fn")))
|
||||
#else /* Not ELF: a.out */
|
||||
# ifdef HAVE_XCOFF
|
||||
/* XCOFF does not support .stabs.
|
||||
The native aix linker will remove the .stab and .stabstr sections
|
||||
The gnu linker will have a fatal error if there is a relocation for
|
||||
symbol in the .stab section. Silently disable this macro. */
|
||||
# define link_warning(symbol, msg)
|
||||
# else
|
||||
# define link_warning(symbol, msg) \
|
||||
asm (".stabs \"" msg "\",30,0,0,0\n\t" \
|
||||
".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n");
|
||||
# endif /* XCOFF */
|
||||
# define libc_freeres_ptr(decl) decl
|
||||
# define __libc_freeres_fn_section
|
||||
#endif
|
||||
|
||||
#define libc_freeres_fn(name) \
|
||||
static void name (void) __attribute_used__ __libc_freeres_fn_section; \
|
||||
text_set_element (__libc_subfreeres, name); \
|
||||
@@ -337,77 +319,50 @@ for linking")
|
||||
|
||||
/* Symbol set support macros. */
|
||||
|
||||
#ifdef HAVE_ELF
|
||||
|
||||
/* Make SYMBOL, which is in the text segment, an element of SET. */
|
||||
# define text_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
#define text_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
/* Make SYMBOL, which is in the data segment, an element of SET. */
|
||||
# define data_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
#define data_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
/* Make SYMBOL, which is in the bss segment, an element of SET. */
|
||||
# define bss_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
#define bss_set_element(set, symbol) _elf_set_element(set, symbol)
|
||||
|
||||
/* These are all done the same way in ELF.
|
||||
There is a new section created for each set. */
|
||||
# ifdef SHARED
|
||||
#ifdef SHARED
|
||||
/* When building a shared library, make the set section writable,
|
||||
because it will need to be relocated at run time anyway. */
|
||||
# define _elf_set_element(set, symbol) \
|
||||
# define _elf_set_element(set, symbol) \
|
||||
static const void *__elf_set_##set##_element_##symbol##__ \
|
||||
__attribute__ ((used, section (#set))) = &(symbol)
|
||||
# else
|
||||
# define _elf_set_element(set, symbol) \
|
||||
#else
|
||||
# define _elf_set_element(set, symbol) \
|
||||
static const void *const __elf_set_##set##_element_##symbol##__ \
|
||||
__attribute__ ((used, section (#set))) = &(symbol)
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Define SET as a symbol set. This may be required (it is in a.out) to
|
||||
be able to use the set's contents. */
|
||||
# define symbol_set_define(set) symbol_set_declare(set)
|
||||
#define symbol_set_define(set) symbol_set_declare(set)
|
||||
|
||||
/* Declare SET for use in this module, if defined in another module.
|
||||
In a shared library, this is always local to that shared object.
|
||||
For static linking, the set might be wholly absent and so we use
|
||||
weak references. */
|
||||
# define symbol_set_declare(set) \
|
||||
#define symbol_set_declare(set) \
|
||||
extern char const __start_##set[] __symbol_set_attribute; \
|
||||
extern char const __stop_##set[] __symbol_set_attribute;
|
||||
# ifdef SHARED
|
||||
# define __symbol_set_attribute attribute_hidden
|
||||
# else
|
||||
# define __symbol_set_attribute __attribute__ ((weak))
|
||||
# endif
|
||||
#ifdef SHARED
|
||||
# define __symbol_set_attribute attribute_hidden
|
||||
#else
|
||||
# define __symbol_set_attribute __attribute__ ((weak))
|
||||
#endif
|
||||
|
||||
/* Return a pointer (void *const *) to the first element of SET. */
|
||||
# define symbol_set_first_element(set) ((void *const *) (&__start_##set))
|
||||
#define symbol_set_first_element(set) ((void *const *) (&__start_##set))
|
||||
|
||||
/* Return true iff PTR (a void *const *) has been incremented
|
||||
past the last element in SET. */
|
||||
# define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set)
|
||||
|
||||
#else /* Not ELF: a.out. */
|
||||
|
||||
# ifdef HAVE_XCOFF
|
||||
/* XCOFF does not support .stabs.
|
||||
The native aix linker will remove the .stab and .stabstr sections
|
||||
The gnu linker will have a fatal error if there is a relocation for
|
||||
symbol in the .stab section. Silently disable these macros. */
|
||||
# define text_set_element(set, symbol)
|
||||
# define data_set_element(set, symbol)
|
||||
# define bss_set_element(set, symbol)
|
||||
# else
|
||||
# define text_set_element(set, symbol) \
|
||||
asm (".stabs \"" __SYMBOL_PREFIX #set "\",23,0,0," __SYMBOL_PREFIX #symbol)
|
||||
# define data_set_element(set, symbol) \
|
||||
asm (".stabs \"" __SYMBOL_PREFIX #set "\",25,0,0," __SYMBOL_PREFIX #symbol)
|
||||
# define bss_set_element(set, symbol) ?error Must use initialized data.
|
||||
# endif /* XCOFF */
|
||||
# define symbol_set_define(set) void *const (set)[1];
|
||||
# define symbol_set_declare(set) extern void *const (set)[1];
|
||||
|
||||
# define symbol_set_first_element(set) &(set)[1]
|
||||
# define symbol_set_end_p(set, ptr) (*(ptr) == 0)
|
||||
|
||||
#endif /* ELF. */
|
||||
#define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set)
|
||||
|
||||
#if DO_VERSIONING
|
||||
# define symbol_version(real, name, version) \
|
||||
|
||||
Reference in New Issue
Block a user