/* Assembler macros for i386.
- Copyright (C) 1991-93,95,96,98,2002,2003,2005,2006,2011,2012
- Free Software Foundation, Inc.
+ Copyright (C) 1991-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
-#include <sysdeps/generic/sysdep.h>
+#include <sysdeps/x86/sysdep.h>
-#ifdef __ASSEMBLER__
-# define GET_PC_THUNK(reg) __i686.get_pc_thunk.reg
+#include <features.h> /* For __GNUC_PREREQ. */
+
+/* It is desirable that the names of PIC thunks match those used by
+ GCC so that multiple copies are eliminated by the linker. Because
+ GCC 4.6 and earlier use __i686 in the names, it is necessary to
+ override that predefined macro. */
+#if defined __i686 && defined __ASSEMBLER__
+#undef __i686
+#define __i686 __i686
+#endif
+
+#ifdef __ASSEMBLER__
+# define GET_PC_THUNK(reg) __x86.get_pc_thunk.reg
#else
-# define GET_PC_THUNK_STR(reg) "__i686.get_pc_thunk." #reg
+# define GET_PC_THUNK_STR(reg) "__x86.get_pc_thunk." #reg
#endif
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
-/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
-#define ALIGNARG(log2) 1<<log2
-/* For ELF we need the `.type' directive to make shared libs work right. */
-#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
-#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
-
-
-/* Define an entry point visible from C.
-
- There is currently a bug in gdb which prevents us from specifying
- incomplete stabs information. Fake some entries here which specify
- the current source file. */
-#define ENTRY(name) \
- STABS_CURRENT_FILE1("") \
- STABS_CURRENT_FILE(name) \
- ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
- ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
- .align ALIGNARG(4); \
- STABS_FUN(name) \
- C_LABEL(name) \
- cfi_startproc; \
- CALL_MCOUNT
-
-#undef END
-#define END(name) \
- cfi_endproc; \
- ASM_SIZE_DIRECTIVE(name) \
- STABS_FUN_END(name)
-
-#define ENTRY_CHK(name) ENTRY (name)
-#define END_CHK(name) END (name)
-
-#ifdef HAVE_CPP_ASM_DEBUGINFO
-/* Disable that goop, because we just pass -g through to the assembler
- and it generates proper line number information directly. */
-# define STABS_CURRENT_FILE1(name)
-# define STABS_CURRENT_FILE(name)
-# define STABS_FUN(name)
-# define STABS_FUN_END(name)
-#else
-/* Remove the following two lines once the gdb bug is fixed. */
-#define STABS_CURRENT_FILE(name) \
- STABS_CURRENT_FILE1 (#name)
-#define STABS_CURRENT_FILE1(name) \
- 1: .stabs name,100,0,0,1b;
-/* Emit stabs definition lines. We use F(0,1) and define t(0,1) as `int',
- the same way gcc does it. */
-#define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1))
-#define STABS_FUN2(name, namestr) \
- .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; \
- .stabs #namestr,36,0,0,name;
-#define STABS_FUN_END(name) \
- 1: .stabs "",36,0,0,1b-name;
-#endif
-
/* If compiled for profiling, call `mcount' at the start of each function. */
#ifdef PROF
/* The mcount code relies on a normal frame pointer being on the stack
#define CALL_MCOUNT /* Do nothing. */
#endif
-/* Since C identifiers are not normally prefixed with an underscore
- on this system, the asm identifier `syscall_error' intrudes on the
- C name space. Make sure we use an innocuous name. */
-#define syscall_error __syscall_error
-#define mcount _mcount
-
#define PSEUDO(name, syscall_name, args) \
.globl syscall_error; \
lose: SYSCALL_PIC_SETUP \
DO_CALL (syscall_name, args); \
jb lose
-#undef PSEUDO_END
-#define PSEUDO_END(name) \
- END (name)
-
# define SETUP_PIC_REG(reg) \
.ifndef GET_PC_THUNK(reg); \
.section .gnu.linkonce.t.GET_PC_THUNK(reg),"ax",@progbits; \
call 0f; \
0: popl %ebx; \
cfi_adjust_cfa_offset (-4); \
- addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx;
+ addl $_GLOBAL_OFFSET_TABLE_+[.-0b], %ebx;
#else
#define JUMPTARGET(name) name
#define SYSCALL_PIC_SETUP /* Nothing. */
#endif
-/* Local label name for asm code. */
-#ifndef L
-#define L(name) .L##name
-#endif
-
-#define atom_text_section .section ".text.atom", "ax"
-
#else /* __ASSEMBLER__ */
# define SETUP_PIC_REG_STR(reg) \
projects / thirdparty / glibc.git / blobdiff