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Diffstat (limited to 'sysdeps/cris/sysdep.h')
| -rw-r--r-- | sysdeps/cris/sysdep.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/sysdeps/cris/sysdep.h b/sysdeps/cris/sysdep.h new file mode 100644 index 0000000000..ada5de350c --- /dev/null +++ b/sysdeps/cris/sysdep.h @@ -0,0 +1,114 @@ +/* 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, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdeps/generic/sysdep.h> + +#ifndef HAVE_ELF +# error ELF is assumed. Generalize the code and retry. +#endif + +#ifndef NO_UNDERSCORES +# error User-label prefix (underscore) assumed absent. Generalize the code and retry. +#endif + +#ifdef __ASSEMBLER__ + +/* 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 $r0 is set up as + GOT register. */ +# ifdef __PIC__ +# define PLTJUMP(_x) \ + add.d C_SYMBOL_NAME (_x):PLT,$pc + +# define PLTCALL(_x) \ + move.d C_SYMBOL_NAME (_x):PLTG,$r9 @ \ + add.d $r0,$r9 @ \ + jsr $r9 + +# 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 + +/* Define an entry point visible from C. */ +# define ENTRY(name) \ + .text @ \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (name) @ \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME (name), function) @ \ + .align ALIGNARG (2) @ \ + C_LABEL(name) @ \ + CALL_MCOUNT + +# undef END +# define END(name) \ + ASM_SIZE_DIRECTIVE (C_SYMBOL_NAME (name)) + +/* If compiled for profiling, call `mcount' at the start of each function. + FIXME: Note that profiling is not actually implemented. This is just + example code which might not even compile, though it is believed to be + correct. */ +# ifdef PROF +# define CALL_MCOUNT \ + push $srp @ \ + push $r9 @ \ + push $r10 @ \ + push $r11 @ \ + push $r12 @ \ + push $r13 @ \ + SETUP_PIC @ \ + PLTCALL (mcount) @ \ + TEARDOWN_PIC @ \ + pop $r13 @ \ + pop $r12 @ \ + pop $r11 @ \ + pop $r10 @ \ + pop $r9 @ \ + pop $srp +# else +# define CALL_MCOUNT /* Do nothing. */ +# 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__ */ |