| /* Copyright (C) 1997-2018 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/>. */ |
| |
| #ifndef _AARCH64_SYSDEP_H |
| #define _AARCH64_SYSDEP_H |
| |
| #include <sysdeps/generic/sysdep.h> |
| |
| #ifdef __LP64__ |
| # define AARCH64_R(NAME) R_AARCH64_ ## NAME |
| # define PTR_REG(n) x##n |
| # define PTR_LOG_SIZE 3 |
| # define DELOUSE(n) |
| #else |
| # define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME |
| # define PTR_REG(n) w##n |
| # define PTR_LOG_SIZE 2 |
| # define DELOUSE(n) mov w##n, w##n |
| #endif |
| |
| #define PTR_SIZE (1<<PTR_LOG_SIZE) |
| |
| #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, #-80]!; \ |
| cfi_adjust_cfa_offset (80); \ |
| cfi_rel_offset (x30, 0); \ |
| stp x0, x1, [sp, #16]; \ |
| cfi_rel_offset (x0, 16); \ |
| cfi_rel_offset (x1, 24); \ |
| stp x2, x3, [sp, #32]; \ |
| cfi_rel_offset (x2, 32); \ |
| cfi_rel_offset (x3, 40); \ |
| stp x4, x5, [sp, #48]; \ |
| cfi_rel_offset (x4, 48); \ |
| cfi_rel_offset (x5, 56); \ |
| stp x6, x7, [sp, #64]; \ |
| cfi_rel_offset (x6, 64); \ |
| cfi_rel_offset (x7, 72); \ |
| mov x0, x30; \ |
| bl mcount; \ |
| ldp x0, x1, [sp, #16]; \ |
| cfi_restore (x0); \ |
| cfi_restore (x1); \ |
| ldp x2, x3, [sp, #32]; \ |
| cfi_restore (x2); \ |
| cfi_restore (x3); \ |
| ldp x4, x5, [sp, #48]; \ |
| cfi_restore (x4); \ |
| cfi_restore (x5); \ |
| ldp x6, x7, [sp, #64]; \ |
| cfi_restore (x6); \ |
| cfi_restore (x7); \ |
| ldr x30, [sp], #80; \ |
| cfi_adjust_cfa_offset (-80); \ |
| cfi_restore (x30); |
| #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. |
| Note R and T are register numbers and not register names. */ |
| #define LDST_PCREL(OP, R, T, EXPR) \ |
| adrp x##T, EXPR; \ |
| OP PTR_REG (R), [x##T, #:lo12:EXPR]; \ |
| |
| /* Load or store to/from a got-relative EXPR into/from R, using T. |
| Note R and T are register numbers and not register names. */ |
| #define LDST_GLOBAL(OP, R, T, EXPR) \ |
| adrp x##T, :got:EXPR; \ |
| ldr PTR_REG (T), [x##T, #:got_lo12:EXPR]; \ |
| OP PTR_REG (R), [x##T]; |
| |
| /* Load an immediate into R. |
| Note R is a register number and not a register name. */ |
| #ifdef __LP64__ |
| # define MOVL(R, NAME) \ |
| movz PTR_REG (R), #:abs_g3:NAME; \ |
| movk PTR_REG (R), #:abs_g2_nc:NAME; \ |
| movk PTR_REG (R), #:abs_g1_nc:NAME; \ |
| movk PTR_REG (R), #:abs_g0_nc:NAME; |
| #else |
| # define MOVL(R, NAME) \ |
| movz PTR_REG (R), #:abs_g1:NAME; \ |
| movk PTR_REG (R), #:abs_g0_nc:NAME; |
| #endif |
| |
| /* 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__ */ |
| |
| #endif /* _AARCH64_SYSDEP_H */ |