1 /* Copyright (C) 1997-2021 Free Software Foundation, Inc. 2 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 License as 7 published by the Free Software Foundation; either version 2.1 of the 8 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, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <sysdeps/generic/sysdep.h> 20 21 #ifdef __ASSEMBLER__ 22 23 /* Syntactic details of assembler. */ 24 25 # define ALIGNARG(log2) log2 26 # define ASM_SIZE_DIRECTIVE(name) .size name,.-name 27 28 /* Define an entry point visible from C. */ 29 # define ENTRY(name) \ 30 .globl C_SYMBOL_NAME(name); \ 31 .type C_SYMBOL_NAME(name),@function; \ 32 .align ALIGNARG(2); \ 33 C_LABEL(name) \ 34 CALL_MCOUNT 35 36 # undef END 37 # define END(name) ASM_SIZE_DIRECTIVE(name) 38 39 40 /* If compiled for profiling, call `_mcount' at the start of each function. */ 41 # ifdef PROF 42 /* The mcount code relies on a normal frame pointer being on the stack 43 to locate our caller, so push one just for its benefit. */ 44 # define CALL_MCOUNT \ 45 addik r1,r1,-4; \ 46 swi r15,r1,0; \ 47 brlid r15,JUMPTARGET(mcount); \ 48 nop; \ 49 lwi r15,r1,0; \ 50 addik r1,r1,4; 51 # else 52 # define CALL_MCOUNT /* Do nothing. */ 53 # endif 54 55 /* Since C identifiers are not normally prefixed with an underscore 56 on this system, the asm identifier `syscall_error' intrudes on the 57 C name space. Make sure we use an innocuous name. */ 58 # define syscall_error __syscall_error 59 # define mcount _mcount 60 61 # define PSEUDO(name, syscall_name, args) \ 62 .globl syscall_error; \ 63 ENTRY (name) \ 64 DO_CALL (syscall_name, args); 65 66 # define ret \ 67 rtsd r15,8; nop; 68 69 # undef PSEUDO_END 70 # define PSEUDO_END(name) \ 71 END (name) 72 73 # undef JUMPTARGET 74 # ifdef PIC 75 # define JUMPTARGET(name) name##@PLTPC 76 # else 77 # define JUMPTARGET(name) name 78 # endif 79 80 /* Local label name for asm code. */ 81 # ifndef L 82 # define L(name) $L##name 83 # endif 84 85 # endif /* __ASSEMBLER__ */ 86