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authorpaul <paul@7b3dc134-2b1b-0410-93df-9e9f96275f8d>2008-04-02 13:44:29 +0000
committerpaul <paul@7b3dc134-2b1b-0410-93df-9e9f96275f8d>2008-04-02 13:44:29 +0000
commit94dd1b7f2ad990dad6bcc61e0e38815caf3182cb (patch)
treeb3a4ab9d0b4304ebacb27322071f4c94dccf5ebb
parent7c5d4001fb94aa2027530f79ac48918b15361a2b (diff)
2008-04-02 Paul Brook <paul@codesourcery.com>
* sysdeps/arm/eabi/machine-gmon.h: New file. git-svn-id: svn://svn.eglibc.org/trunk@5761 7b3dc134-2b1b-0410-93df-9e9f96275f8d
-rw-r--r--ports/ChangeLog.eglibc4
-rw-r--r--ports/sysdeps/arm/eabi/machine-gmon.h93
2 files changed, 97 insertions, 0 deletions
diff --git a/ports/ChangeLog.eglibc b/ports/ChangeLog.eglibc
index 9659021f1..41b44ee28 100644
--- a/ports/ChangeLog.eglibc
+++ b/ports/ChangeLog.eglibc
@@ -1,3 +1,7 @@
+2008-04-02 Paul Brook <paul@codesourcery.com>
+
+ * sysdeps/arm/eabi/machine-gmon.h: New file.
+
2007-08-29 Daniel Jacobowitz <dan@codesourcery.com>
* sysdeps/powerpc/powerpc32/e500/fpu/fsetexcptflg.c
diff --git a/ports/sysdeps/arm/eabi/machine-gmon.h b/ports/sysdeps/arm/eabi/machine-gmon.h
new file mode 100644
index 000000000..9a819b853
--- /dev/null
+++ b/ports/sysdeps/arm/eabi/machine-gmon.h
@@ -0,0 +1,93 @@
+/* Machine-dependent definitions for profiling support. ARM EABI version.
+ Copyright (C) 2008 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. */
+
+/* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0,
+ so we must use an assembly stub. */
+
+#include <sysdep.h>
+static void mcount_internal (u_long frompc, u_long selfpc) __attribute_used__;
+
+#define _MCOUNT_DECL(frompc, selfpc) \
+static void mcount_internal (u_long frompc, u_long selfpc)
+
+/* Use an assembly stub with a special ABI. The calling lr has been
+ pushed to the stack (which will be misaligned). We should preserve
+ all registers except ip and pop a word off the stack.
+ The calling sequence looks something like:
+func:
+ push {lr}
+ bl __gnu_mount_nc
+ <function body>
+ */
+
+
+#define MCOUNT \
+void __attribute__((__naked__)) __gnu_mcount_nc(void) \
+{ \
+ asm ("push {r0, r1, r2, r3, lr}\n\t" \
+ "bic r1, lr, #1\n\t" \
+ "ldr r0, [sp, #20]\n\t" \
+ "bl mcount_internal\n\t" \
+ "pop {r0, r1, r2, r3, ip, lr}\n\t" \
+ "bx ip"); \
+} \
+OLD_MCOUNT
+
+/* Provide old mcount for backwards compatibility. This requires
+ code be compiled with APCS frame pointers. */
+
+#ifndef NO_UNDERSCORES
+/* The asm symbols for C functions are `_function'.
+ The canonical name for the counter function is `mcount', no _. */
+void _mcount (void) asm ("mcount");
+#else
+/* The canonical name for the function is `_mcount' in both C and asm,
+ but some old asm code might assume it's `mcount'. */
+void _mcount (void);
+weak_alias (_mcount, mcount)
+#endif
+
+#ifdef __thumb2__
+
+#define OLD_MCOUNT \
+void __attribute__((__naked__)) _mcount (void) \
+{ \
+ __asm__("push {r0, r1, r2, r3, fp, lr};" \
+ "movs r0, fp;" \
+ "ldrne r0, [r0, #-4];" \
+ "movsne r1, lr;" \
+ "blne mcount_internal;" \
+ "pop {r0, r1, r2, r3, fp, pc}"); \
+}
+
+#else
+
+#define OLD_MCOUNT \
+void __attribute__((__naked__)) _mcount (void) \
+{ \
+ __asm__("stmdb sp!, {r0, r1, r2, r3, fp, lr};" \
+ "movs fp, fp;" \
+ "ldrne r0, [fp, #-4];" \
+ "movnes r1, lr;" \
+ "blne mcount_internal;" \
+ "ldmia sp!, {r0, r1, r2, r3, fp, lr};" \
+ "bx lr"); \
+}
+
+#endif