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Diffstat (limited to 'sysdeps/s390/s390-32/sysdep.h')
| -rw-r--r-- | sysdeps/s390/s390-32/sysdep.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/sysdeps/s390/s390-32/sysdep.h b/sysdeps/s390/s390-32/sysdep.h new file mode 100644 index 0000000000..a05b83cede --- /dev/null +++ b/sysdeps/s390/s390-32/sysdep.h @@ -0,0 +1,121 @@ +/* Assembler macros for s390. + Copyright (C) 2000, 2001 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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> + +#ifdef __ASSEMBLER__ + +/* Syntactic details of assembler. */ + +#ifdef HAVE_ELF + +/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ +#define ALIGNARG(log2) 1<<log2 +/* For ELF we need the `.type' directive to make shared libs work right. */ +#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; +#define ASM_SIZE_DIRECTIVE(name) .size name,.-name; + +/* In ELF C symbols are asm symbols. */ +#undef NO_UNDERSCORES +#define NO_UNDERSCORES + +#else + +#define ALIGNARG(log2) log2 +#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ +#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ + +#endif + + +/* Define an entry point visible from C. */ +#define ENTRY(name) \ + 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(name) \ + +/* If compiled for profiling, call `mcount' at the start of each function. */ +#ifdef PROF +#ifdef PIC +#define CALL_MCOUNT \ + lr 0,14 ; bras 14,.+12 ; .long _GLOBAL_OFFSET_TABLE_ - . ; .long 0f-. ; \ + lr 1,14 ; al 1,4(14) ; al 14,0(14) ; l 14,_mcount@GOT(14) ; \ + basr 14,14 ; lr 14,0 ; .data ; .align 4 ; 0: .long 0 ; .text ; +#else +#define CALL_MCOUNT \ + lr 0,14 ; bras 14,.+12 ; .long _mcount ; .long 0f ; \ + l 1,4(14) ; l 14,0(14) ; basr 14,14 ; lr 14,0 ; \ + .data ; .align 4 ; 0: .long 0 ; .text ; +#endif +#else +#define CALL_MCOUNT /* Do nothing. */ +#endif + +#ifdef NO_UNDERSCORES +/* 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 + +#define PSEUDO(name, syscall_name, args) \ +lose: SYSCALL_PIC_SETUP \ + JUMPTARGET(syscall_error) \ + .globl syscall_error; \ + ENTRY (name) \ + DO_CALL (syscall_name, args); \ + jm lose + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + END (name) + +#ifdef PIC +#define JUMPTARGET(name) \ + basr %r1,0 \ +0: al %r1,1f-0b(0,%r1) \ + br %r1 \ +1: .long name##@PLT - 0b +#define SYSCALL_PIC_SETUP \ + bras %r12,1f \ +0: .long _GLOBAL_OFFSET_TABLE_-0b \ +1: al %r12,0(%r12) +#else +#define JUMPTARGET(name) \ + basr %r1,0 \ +0: al %r1,1f-0b(0,%r1) \ + br %r1 \ +1: .long name - 0b +#define SYSCALL_PIC_SETUP /* Nothing. */ +#endif + +/* Local label name for asm code. */ +#ifndef L +#define L(name) name +#endif + +#endif /* __ASSEMBLER__ */ |