/* Assembler macros for CRIS. Copyright (C) 1999, 2000, 2001 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _SYSDEP_H_ #define _SYSDEP_H_ #include <common/sysdep.h> #ifndef C_LABEL /* Define a macro we can use to construct the asm name for a C symbol. */ #ifdef __STDC__ #define C_LABEL(name) name##: #else #define C_LABEL(name) name/**/: #endif #endif /* C_LABEL */ #define __STR(x) #x #define STR(x) __STR(x) /* Mark the end of function named SYM. This is used on some platforms to generate correct debugging information. */ #ifndef END #define END(sym) #endif #undef SYS_ify #define SYS_ify(syscall_name) (__NR_##syscall_name) #ifdef __ASSEMBLER__ #undef SYS_ify #define SYS_ify(syscall_name) __NR_##syscall_name /* Syntactic details of assembly-code. */ /* It is *not* generally true that "ELF uses byte-counts for .align, most others use log2 of count of bytes", like some neighboring configs say. See "align" in gas/read.c which is not overridden by gas/config/obj-elf.c. It takes a log2 argument. *Some* targets override it to take a byte argument. People should read source instead of relying on hearsay. */ #define ALIGNARG(log2) log2 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg #define ASM_SIZE_DIRECTIVE(name) .size name,.-name /* The non-PIC jump is preferred, since it does not stall, and does not invoke generation of a PLT. These macros assume that $r0 is set up as GOT register. */ #ifdef __arch_v32 #ifdef __PIC__ #define PLTJUMP(_x) \ ba C_SYMBOL_NAME (_x):PLT @ \ nop #define PLTCALL(_x) \ bsr C_SYMBOL_NAME (_x):PLT @ \ nop #define SETUP_PIC \ subq 4,$sp @ \ move.d $r0,[$sp] @ \ lapc _GLOBAL_OFFSET_TABLE_,$r0 #define TEARDOWN_PIC move.d [$sp+],$r0 #else #define PLTJUMP(_x) \ ba C_SYMBOL_NAME (_x) @ \ nop #define PLTCALL(_x) \ bsr C_SYMBOL_NAME (_x) @ \ nop #define SETUP_PIC #define TEARDOWN_PIC #endif #else #ifdef __PIC__ #define PLTJUMP(_x) \ add.d C_SYMBOL_NAME (_x):PLT,$pc #define PLTCALL(_x) \ jsr [$r0+C_SYMBOL_NAME (_x):GOTPLT16] #define SETUP_PIC \ push $r0 @ \ move.d $pc,$r0 @ \ sub.d .:GOTOFF,$r0 #define TEARDOWN_PIC pop $r0 #else #define PLTJUMP(_x) jump C_SYMBOL_NAME (_x) #define PLTCALL(_x) jsr C_SYMBOL_NAME (_x) #define SETUP_PIC #define TEARDOWN_PIC #endif #endif /* __arch_v32 */ /* Define an entry point visible from C. */ #define ENTRY(name) \ .text @ \ .globl C_SYMBOL_NAME (name) @ \ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME (name), function) @ \ .align ALIGNARG (2) @ \ C_LABEL(name) #define HIDDEN_ENTRY(name) \ .text @ \ .globl C_SYMBOL_NAME (name) @ \ .hidden C_SYMBOL_NAME (name) @ \ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME (name), function) @ \ .align ALIGNARG (2) @ \ C_LABEL(name) #undef END #define END(name) \ ASM_SIZE_DIRECTIVE (C_SYMBOL_NAME (name)) #define PSEUDO(name, syscall_name, args) \ ENTRY (name) @ \ DOARGS_##args @ \ movu.w SYS_ify (syscall_name),$r9 @ \ break 13 @ \ cmps.w -4096,$r10 @ \ bhs 0f @ \ nop @ \ UNDOARGS_return_##args #define PSEUDO_END(name) \ 0: @ \ SETUP_PIC @ \ PLTJUMP (__syscall_error) @ \ END (name) #endif /* __ASSEMBLER__ */ #endif /* _SYSDEP_H_ */