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Diffstat (limited to 'sysdeps/unix/i386/sysdep.h')
-rw-r--r--sysdeps/unix/i386/sysdep.h40
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) \