| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1997-2015 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 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sysdeps/generic/sysdep.h> |
| 20 | |
| 21 | #ifdef __ASSEMBLER__ |
| 22 | |
| 23 | /* Syntactic details of assembler. */ |
| 24 | |
| 25 | #define ASM_SIZE_DIRECTIVE(name) .size name,.-name |
| 26 | |
| 27 | /* Define an entry point visible from C. */ |
| 28 | #define ENTRY(name) \ |
| 29 | .globl C_SYMBOL_NAME(name); \ |
| 30 | .type C_SYMBOL_NAME(name),%function; \ |
| 31 | .align 4; \ |
| 32 | C_LABEL(name) \ |
| 33 | cfi_startproc; \ |
| 34 | CALL_MCOUNT |
| 35 | |
| 36 | /* Define an entry point visible from C. */ |
| 37 | #define ENTRY_ALIGN(name, align) \ |
| 38 | .globl C_SYMBOL_NAME(name); \ |
| 39 | .type C_SYMBOL_NAME(name),%function; \ |
| 40 | .p2align align; \ |
| 41 | C_LABEL(name) \ |
| 42 | cfi_startproc; \ |
| 43 | CALL_MCOUNT |
| 44 | |
| 45 | /* Define an entry point visible from C with a specified alignment and |
| 46 | pre-padding with NOPs. This can be used to ensure that a critical |
| 47 | loop within a function is cache line aligned. Note this version |
| 48 | does not adjust the padding if CALL_MCOUNT is defined. */ |
| 49 | |
| 50 | #define ENTRY_ALIGN_AND_PAD(name, align, padding) \ |
| 51 | .globl C_SYMBOL_NAME(name); \ |
| 52 | .type C_SYMBOL_NAME(name),%function; \ |
| 53 | .p2align align; \ |
| 54 | .rep padding; \ |
| 55 | nop; \ |
| 56 | .endr; \ |
| 57 | C_LABEL(name) \ |
| 58 | cfi_startproc; \ |
| 59 | CALL_MCOUNT |
| 60 | |
| 61 | #undef END |
| 62 | #define END(name) \ |
| 63 | cfi_endproc; \ |
| 64 | ASM_SIZE_DIRECTIVE(name) |
| 65 | |
| 66 | /* If compiled for profiling, call `mcount' at the start of each function. */ |
| 67 | #ifdef PROF |
| 68 | # define CALL_MCOUNT \ |
| 69 | str x30, [sp, #-16]!; \ |
| 70 | bl mcount; \ |
| 71 | ldr x30, [sp], #16 ; |
| 72 | #else |
| 73 | # define CALL_MCOUNT /* Do nothing. */ |
| 74 | #endif |
| 75 | |
| 76 | /* Local label name for asm code. */ |
| 77 | #ifndef L |
| 78 | # define L(name) .L##name |
| 79 | #endif |
| 80 | |
| 81 | /* Load or store to/from a pc-relative EXPR into/from R, using T. */ |
| 82 | #define LDST_PCREL(OP, R, T, EXPR) \ |
| 83 | adrp T, EXPR; \ |
| 84 | OP R, [T, #:lo12:EXPR];\ |
| 85 | |
| 86 | /* Load or store to/from a got-relative EXPR into/from R, using T. */ |
| 87 | #define LDST_GLOBAL(OP, R, T, EXPR) \ |
| 88 | adrp T, :got:EXPR; \ |
| 89 | ldr T, [T, #:got_lo12:EXPR];\ |
| 90 | OP R, [T]; |
| 91 | |
| 92 | /* Since C identifiers are not normally prefixed with an underscore |
| 93 | on this system, the asm identifier `syscall_error' intrudes on the |
| 94 | C name space. Make sure we use an innocuous name. */ |
| 95 | #define syscall_error __syscall_error |
| 96 | #define mcount _mcount |
| 97 | |
| 98 | #endif /* __ASSEMBLER__ */ |