2001-09-19 18:37:31 +08:00
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/* Assembler macros for x86-64.
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2003-01-10 04:30:21 +08:00
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Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
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2001-09-19 18:37:31 +08:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdeps/generic/sysdep.h>
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#ifdef __ASSEMBLER__
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/* Syntactic details of assembler. */
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#ifdef HAVE_ELF
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/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
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#define ALIGNARG(log2) 1<<log2
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/* For ELF we need the `.type' directive to make shared libs work right. */
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#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
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#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
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/* In ELF C symbols are asm symbols. */
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#undef NO_UNDERSCORES
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#define NO_UNDERSCORES
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#else
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#define ALIGNARG(log2) log2
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#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
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#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
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#endif
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/* Define an entry point visible from C. */
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#define ENTRY(name) \
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
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.align ALIGNARG(4); \
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C_LABEL(name) \
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* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 Andreas Jaeger <aj@suse.de>
* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 17:25:53 +08:00
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cfi_startproc; \
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2001-09-19 18:37:31 +08:00
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CALL_MCOUNT
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#undef END
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#define END(name) \
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* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 Andreas Jaeger <aj@suse.de>
* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 17:25:53 +08:00
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cfi_endproc; \
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ASM_SIZE_DIRECTIVE(name)
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2001-09-19 18:37:31 +08:00
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/* If compiled for profiling, call `mcount' at the start of each function. */
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#ifdef PROF
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/* The mcount code relies on a normal frame pointer being on the stack
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to locate our caller, so push one just for its benefit. */
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* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 Andreas Jaeger <aj@suse.de>
* sysdeps/generic/sysdep.h (cfi_offset, cfi_startproc,
cfi_endproc, cfi_def_cfa, cfi_def_ccfa_register,
cfi_def_cfa_offset, cfi_adjust_cfa_offset, cfi_offset): Define.
* sysdeps/x86_64/sysdep.h (CALL_MCOUNT): Add cfi directives.
(ENTRY): Likewise.
(END): Likewise.
* configure.in: Test for asm cfi directives.
* config.h.in: Add HAVE_ASM_CFI_DIRECTIVES.
2003-05-21 17:25:53 +08:00
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#define CALL_MCOUNT \
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pushq %rbp; \
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cfi_adjust_cfa_offset(8); \
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movq %rsp, %rbp; \
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cfi_def_cfa_register(%rbp); \
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call JUMPTARGET(mcount); \
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popq %rbp; \
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cfi_def_cfa(rsp,8);
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2001-09-19 18:37:31 +08:00
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#else
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#define CALL_MCOUNT /* Do nothing. */
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#endif
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#ifdef NO_UNDERSCORES
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/* Since C identifiers are not normally prefixed with an underscore
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on this system, the asm identifier `syscall_error' intrudes on the
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C name space. Make sure we use an innocuous name. */
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#define syscall_error __syscall_error
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#define mcount _mcount
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#endif
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#define PSEUDO(name, syscall_name, args) \
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lose: \
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jmp JUMPTARGET(syscall_error) \
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.globl syscall_error; \
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ENTRY (name) \
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DO_CALL (syscall_name, args); \
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jb lose
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#undef PSEUDO_END
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#define PSEUDO_END(name) \
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END (name)
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2003-01-10 04:30:21 +08:00
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#undef JUMPTARGET
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2001-09-19 18:37:31 +08:00
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#ifdef PIC
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#define JUMPTARGET(name) name##@PLT
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#else
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#define JUMPTARGET(name) name
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#endif
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/* Local label name for asm code. */
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#ifndef L
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2002-09-29 18:38:40 +08:00
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# ifdef HAVE_ELF
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/* ELF-like local names start with `.L'. */
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# define L(name) .L##name
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# else
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# define L(name) name
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# endif
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2001-09-19 18:37:31 +08:00
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#endif
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#endif /* __ASSEMBLER__ */
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