diff options
Diffstat (limited to 'newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h')
| -rw-r--r-- | newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h new file mode 100644 index 000000000..02b4c19af --- /dev/null +++ b/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h @@ -0,0 +1,130 @@ +/* Assembler macros for i386. + Copyright (C) 1991, 92, 93, 95, 96, 98 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define NO_UNDERSCORES + +#include <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. + + There is currently a bug in gdb which prevents us from specifying + incomplete stabs information. Fake some entries here which specify + the current source file. */ +#define ENTRY(name) \ + STABS_CURRENT_FILE1("") \ + STABS_CURRENT_FILE(name) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ + .align ALIGNARG(4); \ + STABS_FUN(name) \ + C_LABEL(name) \ + CALL_MCOUNT + +#undef END +#define END(name) \ + ASM_SIZE_DIRECTIVE(name) \ + STABS_FUN_END(name) + +/* Remove the following two lines once the gdb bug is fixed. */ +#define STABS_CURRENT_FILE(name) \ + STABS_CURRENT_FILE1 (#name) +#define STABS_CURRENT_FILE1(name) \ + 1: .stabs name,100,0,0,1b; +/* Emit stabs definition lines. We use F(0,1) and define t(0,1) as `int', + the same way gcc does it. */ +#define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1)) +#define STABS_FUN2(name, namestr) \ + .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; \ + .stabs #namestr,36,0,0,name; +#define STABS_FUN_END(name) \ + 1: .stabs "",36,0,0,1b-name; + +/* If compiled for profiling, call `mcount' at the start of each function. */ +#ifdef PROF +/* The mcount code relies on a normal frame pointer being on the stack + to locate our caller, so push one just for its benefit. */ +#define CALL_MCOUNT \ + pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp; +#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 \ + jmp JUMPTARGET(syscall_error) \ + .globl syscall_error; \ + ENTRY (name) \ + DO_CALL (syscall_name, args); \ + jb lose + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + END (name) + +#ifdef PIC +#define JUMPTARGET(name) name##@PLT +#define SYSCALL_PIC_SETUP \ + pushl %ebx; \ + call 0f; \ +0: popl %ebx; \ + addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx; +#else +#define JUMPTARGET(name) name +#define SYSCALL_PIC_SETUP /* Nothing. */ +#endif + +/* Local label name for asm code. */ +#ifndef L +#define L(name) name +#endif + +#endif /* __ASSEMBLER__ */ |