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99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* Copyright (C) 1997-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdeps/generic/sysdep.h>
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#ifdef __ASSEMBLER__
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/* Syntactic details of assembler. */
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#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
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/* Define an entry point visible from C. */
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#define ENTRY(name) \
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.globl C_SYMBOL_NAME(name); \
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.type C_SYMBOL_NAME(name),%function; \
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.align 4; \
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C_LABEL(name) \
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cfi_startproc; \
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CALL_MCOUNT
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/* Define an entry point visible from C. */
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#define ENTRY_ALIGN(name, align) \
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.globl C_SYMBOL_NAME(name); \
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.type C_SYMBOL_NAME(name),%function; \
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.p2align align; \
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C_LABEL(name) \
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cfi_startproc; \
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CALL_MCOUNT
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/* Define an entry point visible from C with a specified alignment and
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pre-padding with NOPs. This can be used to ensure that a critical
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loop within a function is cache line aligned. Note this version
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does not adjust the padding if CALL_MCOUNT is defined. */
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#define ENTRY_ALIGN_AND_PAD(name, align, padding) \
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.globl C_SYMBOL_NAME(name); \
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.type C_SYMBOL_NAME(name),%function; \
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.p2align align; \
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.rep padding; \
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nop; \
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.endr; \
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C_LABEL(name) \
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cfi_startproc; \
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CALL_MCOUNT
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#undef END
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#define END(name) \
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cfi_endproc; \
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ASM_SIZE_DIRECTIVE(name)
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/* If compiled for profiling, call `mcount' at the start of each function. */
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#ifdef PROF
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# define CALL_MCOUNT \
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str x30, [sp, #-16]!; \
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bl mcount; \
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ldr x30, [sp], #16 ;
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#else
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# define CALL_MCOUNT /* Do nothing. */
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#endif
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/* Local label name for asm code. */
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#ifndef L
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# define L(name) .L##name
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#endif
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/* Load or store to/from a pc-relative EXPR into/from R, using T. */
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#define LDST_PCREL(OP, R, T, EXPR) \
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adrp T, EXPR; \
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OP R, [T, #:lo12:EXPR];\
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/* Load or store to/from a got-relative EXPR into/from R, using T. */
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#define LDST_GLOBAL(OP, R, T, EXPR) \
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adrp T, :got:EXPR; \
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ldr T, [T, #:got_lo12:EXPR];\
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OP R, [T];
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/* Since C identifiers are not normally prefixed with an underscore
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on this system, the asm identifier `syscall_error' intrudes on the
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C name space. Make sure we use an innocuous name. */
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#define syscall_error __syscall_error
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#define mcount _mcount
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#endif /* __ASSEMBLER__ */
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