diff options
Diffstat (limited to 'sysdeps/unix/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/i386/sysdep.h | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/sysdeps/unix/i386/sysdep.h b/sysdeps/unix/i386/sysdep.h index fb1781b156..16a76b1d5f 100644 --- a/sysdeps/unix/i386/sysdep.h +++ b/sysdeps/unix/i386/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc. +/* Copyright (C) 1991, 92, 93, 95, 96 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 @@ -20,18 +20,43 @@ Cambridge, MA 02139, USA. */ #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; + +/* 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. */ + +#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 4; \ - C_LABEL(name) + .align ALIGNARG(4); \ + C_LABEL(name) \ + CALL_MCOUNT -/* For ELF we need the `.type' directive to make shared libs work right. */ -#ifdef HAVE_ELF -#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; +/* 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 ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ +#define CALL_MCOUNT /* Do nothing. */ #endif #ifdef NO_UNDERSCORES @@ -39,6 +64,7 @@ Cambridge, MA 02139, USA. */ 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) \ |