| /* Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdeps/generic/sysdep.h> |
| |
| #ifdef __ASSEMBLER__ |
| |
| /* Syntactic details of assembler. */ |
| |
| #define ASM_SIZE_DIRECTIVE(name) .size name,.-name |
| |
| /* Define an entry point visible from C. */ |
| #define ENTRY(name) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),%function; \ |
| .align 4; \ |
| C_LABEL(name) \ |
| cfi_startproc; \ |
| CALL_MCOUNT |
| |
| /* Define an entry point visible from C. */ |
| #define ENTRY_ALIGN(name, align) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),%function; \ |
| .p2align align; \ |
| C_LABEL(name) \ |
| cfi_startproc; \ |
| CALL_MCOUNT |
| |
| /* Define an entry point visible from C with a specified alignment and |
| pre-padding with NOPs. This can be used to ensure that a critical |
| loop within a function is cache line aligned. Note this version |
| does not adjust the padding if CALL_MCOUNT is defined. */ |
| |
| #define ENTRY_ALIGN_AND_PAD(name, align, padding) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),%function; \ |
| .p2align align; \ |
| .rep padding; \ |
| nop; \ |
| .endr; \ |
| C_LABEL(name) \ |
| cfi_startproc; \ |
| CALL_MCOUNT |
| |
| #undef END |
| #define END(name) \ |
| cfi_endproc; \ |
| ASM_SIZE_DIRECTIVE(name) |
| |
| /* If compiled for profiling, call `mcount' at the start of each function. */ |
| #ifdef PROF |
| # define CALL_MCOUNT \ |
| str x30, [sp, #-16]!; \ |
| bl mcount; \ |
| ldr x30, [sp], #16 ; |
| #else |
| # define CALL_MCOUNT /* Do nothing. */ |
| #endif |
| |
| /* Local label name for asm code. */ |
| #ifndef L |
| # define L(name) .L##name |
| #endif |
| |
| /* Load or store to/from a pc-relative EXPR into/from R, using T. */ |
| #define LDST_PCREL(OP, R, T, EXPR) \ |
| adrp T, EXPR; \ |
| OP R, [T, #:lo12:EXPR];\ |
| |
| /* Load or store to/from a got-relative EXPR into/from R, using T. */ |
| #define LDST_GLOBAL(OP, R, T, EXPR) \ |
| adrp T, :got:EXPR; \ |
| ldr T, [T, #:got_lo12:EXPR];\ |
| OP R, [T]; |
| |
| /* Since C identifiers are not normally prefixed with an underscore |
| on this system, the asm identifier `syscall_error' intrudes on the |
| C name space. Make sure we use an innocuous name. */ |
| #define syscall_error __syscall_error |
| #define mcount _mcount |
| |
| #endif /* __ASSEMBLER__ */ |