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107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/* Assembler macros for m68k.
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Copyright (C) 1998, 2003, 2010, 2012 Free Software Foundation, Inc.
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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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There is currently a bug in gdb which prevents us from specifying
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incomplete stabs information. Fake some entries here which specify
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the current source file. */
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# define ENTRY(name) \
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.globl C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function); \
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.align ALIGNARG(2); \
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C_LABEL(name) \
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cfi_startproc; \
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CALL_MCOUNT
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# undef END
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# define END(name) \
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cfi_endproc; \
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ASM_SIZE_DIRECTIVE(name)
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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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# define CALL_MCOUNT \
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move.l %fp, -(%sp); \
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cfi_adjust_cfa_offset (4); cfi_rel_offset (%fp, 0); \
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move.l %sp, %fp; \
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jbsr JUMPTARGET (mcount); \
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move.l (%sp)+, %fp; \
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cfi_adjust_cfa_offset (-4); cfi_restore (%fp);
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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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.globl syscall_error; \
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ENTRY (name) \
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DO_CALL (syscall_name, args); \
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jcc JUMPTARGET(syscall_error)
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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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# undef JUMPTARGET
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# ifdef PIC
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# define JUMPTARGET(name) name##@PLTPC
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# else
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# define JUMPTARGET(name) name
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# endif
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#endif /* __ASSEMBLER__ */
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