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mips64 profiling support
- From: Alexandre Oliva <aoliva at redhat dot com>
- To: libc-alpha at sources dot redhat dot com
- Date: 14 Mar 2003 12:44:57 -0300
- Subject: mips64 profiling support
- Organization: GCC Team, Red Hat
This patch depends on a patch for gcc that I'm about to check in. The
mcount ABI for o32 needlessly required the caller to push two words
onto the stack, that mcount had to pop. We decided to fix this in n32
and n64. Ok?
Index: ChangeLog
from Alexandre Oliva <aoliva at redhat dot com>
* sysdeps/mips/machine-gmon.h (MCOUNT): Define for N32 and N64 as
well.
2003-03-14 Alexandre Oliva <aoliva at redhat dot com>
Index: sysdeps/mips/machine-gmon.h
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mips/machine-gmon.h,v
retrieving revision 1.6
diff -u -p -r1.6 machine-gmon.h
--- sysdeps/mips/machine-gmon.h 11 Feb 2002 10:23:36 -0000 1.6
+++ sysdeps/mips/machine-gmon.h 14 Mar 2003 15:43:09 -0000
@@ -1,5 +1,6 @@
/* Machine-specific calling sequence for `mcount' profiling function. MIPS
- Copyright (C) 1996, 1997, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003
+ 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
@@ -20,14 +21,16 @@
#define _MCOUNT_DECL(frompc,selfpc) \
static void __attribute_used__ __mcount (u_long frompc, u_long selfpc)
+#if _MIPS_SIM == _MIPS_SIM_ABI32
+
/* Call __mcount with our the return PC for our caller,
and the return PC our caller will return to. */
#ifdef __PIC__
-#define CPLOAD ".cpload $25;"
-#define CPRESTORE ".cprestore 44\n\t"
+# define CPLOAD ".cpload $25;"
+# define CPRESTORE ".cprestore 44\n\t"
#else
-#define CPLOAD
-#define CPRESTORE
+# define CPLOAD
+# define CPRESTORE
#endif
#define MCOUNT asm(\
@@ -66,3 +69,72 @@ static void __attribute_used__ __mcount
".set reorder;\n\t" \
".set at\n\t" \
".end _mcount");
+
+#else
+
+/* Call __mcount with our the return PC for our caller,
+ and the return PC our caller will return to. */
+#ifdef __PIC__
+# define CPSETUP ".cpsetup $25, 88, _mcount;"
+# define CPRETURN ".cpreturn;"
+#else
+# define CPSETUP
+# define CPRETURN
+#endif
+
+#if defined _ABIN32 && _MIPS_SIM == _ABIN32
+# define PTR_ADDU_STRING "add" /* no u */
+# define PTR_SUBU_STRING "sub" /* no u */
+#elif defined _ABI64 && _MIPS_SIM == _ABI64
+# define PTR_ADDU_STRING "daddu"
+# define PTR_SUBU_STRING "dsubu"
+#else
+# error "Unknown ABI"
+#endif
+
+#define MCOUNT asm(\
+ ".globl _mcount;\n\t" \
+ ".align 3;\n\t" \
+ ".type _mcount,@function;\n\t" \
+ ".ent _mcount\n\t" \
+ "_mcount:\n\t" \
+ ".frame $sp,88,$31\n\t" \
+ ".set noreorder;\n\t" \
+ ".set noat;\n\t" \
+ PTR_SUBU_STRING " $29,$29,96;\n\t" \
+ CPSETUP \
+ "sd $4,24($29);\n\t" \
+ "sd $5,32($29);\n\t" \
+ "sd $6,40($29);\n\t" \
+ "sd $7,48($29);\n\t" \
+ "sd $8,56($29);\n\t" \
+ "sd $9,64($29);\n\t" \
+ "sd $10,72($29);\n\t" \
+ "sd $11,80($29);\n\t" \
+ "sd $2,16($29);\n\t" \
+ "sd $1,0($29);\n\t" \
+ "sd $31,8($29);\n\t" \
+ "move $5,$31;\n\t" \
+ "move $4,$1;\n\t" \
+ "jal __mcount;\n\t" \
+ "nop;\n\t" \
+ "ld $4,24($29);\n\t" \
+ "ld $5,32($29);\n\t" \
+ "ld $6,40($29);\n\t" \
+ "ld $7,48($29);\n\t" \
+ "ld $8,56($29);\n\t" \
+ "ld $9,64($29);\n\t" \
+ "ld $10,72($29);\n\t" \
+ "ld $11,80($29);\n\t" \
+ "ld $2,16($29);\n\t" \
+ "ld $31,8($29);\n\t" \
+ "ld $1,0($29);\n\t" \
+ CPRETURN \
+ PTR_ADDU_STRING " $29,$29,96;\n\t" \
+ "j $31;\n\t" \
+ "move $31,$1;\n\t" \
+ ".set reorder;\n\t" \
+ ".set at\n\t" \
+ ".end _mcount");
+
+#endif
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva at {redhat dot com, gcc.gnu.org}
CS PhD student at IC-Unicamp oliva at {lsd dot ic dot unicamp dot br, gnu.org}
Free Software Evangelist Professional serial bug killer