1 /* Assembler macros for m68k. 2 Copyright (C) 1998 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #include_next <sysdep.h> 21 22 #ifdef __ASSEMBLER__ 23 24 /* Syntactic details of assembler. */ 25 26 #ifdef HAVE_ELF 27 28 /* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ 29 #define ALIGNARG(log2) 1<<log2 30 /* For ELF we need the `.type' directive to make shared libs work right. */ 31 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg 32 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name 33 34 #else 35 36 #define ALIGNARG(log2) log2 37 #define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ 38 #define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ 39 40 #endif 41 42 43 /* Define an entry point visible from C. 44 45 There is currently a bug in gdb which prevents us from specifying 46 incomplete stabs information. Fake some entries here which specify 47 the current source file. */ 48 #define ENTRY(name) \ 49 .globl C_SYMBOL_NAME(name); \ 50 ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function); \ 51 .align ALIGNARG(2); \ 52 C_LABEL(name) \ 53 CALL_MCOUNT 54 55 #undef END 56 #define END(name) ASM_SIZE_DIRECTIVE(name) 57 58 59 /* If compiled for profiling, call `_mcount' at the start of each function. */ 60 #ifdef PROF 61 /* The mcount code relies on a normal frame pointer being on the stack 62 to locate our caller, so push one just for its benefit. */ 63 #define CALL_MCOUNT \ 64 move.l %fp, -(%sp); move.l %sp, %fp; \ 65 jbsr JUMPTARGET (mcount); \ 66 move.l (%sp)+, %fp; 67 #else 68 #define CALL_MCOUNT /* Do nothing. */ 69 #endif 70 71 /* Since C identifiers are not normally prefixed with an underscore 72 on this system, the asm identifier `syscall_error' intrudes on the 73 C name space. Make sure we use an innocuous name. */ 74 #define syscall_error __syscall_error 75 #define mcount _mcount 76 77 #define PSEUDO(name, syscall_name, args) \ 78 .globl syscall_error; \ 79 ENTRY (name) \ 80 DO_CALL (syscall_name, args); \ 81 jcc JUMPTARGET(syscall_error) 82 83 #undef PSEUDO_END 84 #define PSEUDO_END(name) \ 85 END (name) 86 87 #ifdef PIC 88 #define JUMPTARGET(name) name##@PLTPC 89 #else 90 #define JUMPTARGET(name) name 91 #endif 92 93 #endif /* __ASSEMBLER__ */ 94