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 /* In ELF C symbols are asm symbols. */ 35 #undef NO_UNDERSCORES 36 #define NO_UNDERSCORES 37 38 #else 39 40 #define ALIGNARG(log2) log2 41 #define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ 42 #define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ 43 44 #endif 45 46 47 /* Define an entry point visible from C. 48 49 There is currently a bug in gdb which prevents us from specifying 50 incomplete stabs information. Fake some entries here which specify 51 the current source file. */ 52 #define ENTRY(name) \ 53 .globl C_SYMBOL_NAME(name); \ 54 ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function); \ 55 .align ALIGNARG(2); \ 56 C_LABEL(name) \ 57 CALL_MCOUNT 58 59 #undef END 60 #define END(name) ASM_SIZE_DIRECTIVE(name) 61 62 63 /* If compiled for profiling, call `_mcount' at the start of each function. */ 64 #ifdef PROF 65 /* The mcount code relies on a normal frame pointer being on the stack 66 to locate our caller, so push one just for its benefit. */ 67 #define CALL_MCOUNT \ 68 move.l %fp, -(%sp); move.l %sp, %fp; \ 69 jbsr JUMPTARGET (mcount); \ 70 move.l (%sp)+, %fp; 71 #else 72 #define CALL_MCOUNT /* Do nothing. */ 73 #endif 74 75 #ifdef NO_UNDERSCORES 76 /* Since C identifiers are not normally prefixed with an underscore 77 on this system, the asm identifier `syscall_error' intrudes on the 78 C name space. Make sure we use an innocuous name. */ 79 #define syscall_error __syscall_error 80 #define mcount _mcount 81 #endif 82 83 #define PSEUDO(name, syscall_name, args) \ 84 .globl syscall_error; \ 85 ENTRY (name) \ 86 DO_CALL (syscall_name, args); \ 87 jcc JUMPTARGET(syscall_error) 88 89 #undef PSEUDO_END 90 #define PSEUDO_END(name) \ 91 END (name) 92 93 #ifdef PIC 94 #define JUMPTARGET(name) name##@PLTPC 95 #else 96 #define JUMPTARGET(name) name 97 #endif 98 99 #endif /* __ASSEMBLER__ */ 100