Initial effort at adding profiling support.

6 files changed, 322 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arm/bits/armsigctx.h b/libc/sysdeps/linux/arm/bits/armsigctx.h
new file mode 100644
index 000000000..4530cdbda
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/armsigctx.h
@@ -0,0 +1,73 @@
+/* Definition of `struct sigcontext' for Linux/ARM
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 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.  */
+
+/* The format of struct sigcontext changed between 2.0 and 2.1 kernels.
+   Fortunately 2.0 puts a magic number in the first word and this is not
+   a legal value for `trap_no', so we can tell them apart.  */
+
+/* Early 2.2 and 2.3 kernels do not have the `fault_address' member in
+   the sigcontext structure.  Unfortunately there is no reliable way
+   to test for its presence and this word will contain garbage for too-old
+   kernels.  Versions 2.2.14 and 2.3.35 (plus later versions) are known to
+   include this element.  */
+
+#ifndef __ARMSIGCTX_H
+#define __ARMSIGCTX_H	1
+
+#include <asm/ptrace.h>
+
+union k_sigcontext
+  {
+    struct
+      {
+	unsigned long int trap_no;
+	unsigned long int error_code;
+	unsigned long int oldmask;
+	unsigned long int arm_r0;
+	unsigned long int arm_r1;
+	unsigned long int arm_r2;
+	unsigned long int arm_r3;
+	unsigned long int arm_r4;
+	unsigned long int arm_r5;
+	unsigned long int arm_r6;
+	unsigned long int arm_r7;
+	unsigned long int arm_r8;
+	unsigned long int arm_r9;
+	unsigned long int arm_r10;
+	unsigned long int arm_fp;
+	unsigned long int arm_ip;
+	unsigned long int arm_sp;
+	unsigned long int arm_lr;
+	unsigned long int arm_pc;
+	unsigned long int arm_cpsr;
+	unsigned long fault_address;
+      } v21;
+    struct
+      {
+	unsigned long int magic;
+	struct pt_regs reg;
+	unsigned long int trap_no;
+	unsigned long int error_code;
+	unsigned long int oldmask;
+      } v20;
+};
+
+#define SIGCONTEXT_2_0_MAGIC	0x4B534154
+
+#endif	/* bits/armsigctx.h */
diff --git a/libc/sysdeps/linux/arm/bits/atomicity.h b/libc/sysdeps/linux/arm/bits/atomicity.h
new file mode 100644
index 000000000..1a437a6d3
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/atomicity.h
@@ -0,0 +1,87 @@
+/* Low-level functions for atomic operations.  ARM version.
+   Copyright (C) 1997, 1998, 1999, 2000 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.  */
+
+#ifndef _ATOMICITY_H
+#define _ATOMICITY_H    1
+
+#include <inttypes.h>
+
+
+static inline int
+__attribute__ ((unused))
+exchange_and_add (volatile uint32_t *mem, int val)
+{
+  int tmp1;
+  int tmp2;
+  int result;
+  __asm__ ("\n"
+	   "0:\tldr\t%0,[%3]\n\t"
+	   "add\t%1,%0,%4\n\t"
+	   "swp\t%2,%1,[%3]\n\t"
+	   "cmp\t%0,%2\n\t"
+	   "swpne\t%1,%2,[%3]\n\t"
+	   "bne\t0b"
+	   : "=&r" (result), "=&r" (tmp1), "=&r" (tmp2)
+	   : "r" (mem), "r"(val)
+	   : "cc", "memory");
+  return result;
+}
+
+static inline void
+__attribute__ ((unused))
+atomic_add (volatile uint32_t *mem, int val)
+{
+  int tmp1;
+  int tmp2;
+  int tmp3;
+  __asm__ ("\n"
+	   "0:\tldr\t%0,[%3]\n\t"
+	   "add\t%1,%0,%4\n\t"
+	   "swp\t%2,%1,[%3]\n\t"
+	   "cmp\t%0,%2\n\t"
+	   "swpne\t%1,%2,[%3]\n\t"
+	   "bne\t0b"
+	   : "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3)
+	   : "r" (mem), "r"(val)
+	   : "cc", "memory");
+}
+
+static inline int
+__attribute__ ((unused))
+compare_and_swap (volatile long int *p, long int oldval, long int newval)
+{
+  int result, tmp;
+  __asm__ ("\n"
+	   "0:\tldr\t%1,[%2]\n\t"
+	   "mov\t%0,#0\n\t"
+	   "cmp\t%1,%4\n\t"
+	   "bne\t1f\n\t"
+	   "swp\t%0,%3,[%2]\n\t"
+	   "cmp\t%1,%0\n\t"
+	   "swpne\t%1,%0,[%2]\n\t"
+	   "bne\t0b\n\t"
+	   "mov\t%0,#1\n"
+	   "1:"
+	   : "=&r" (result), "=&r" (tmp)
+	   : "r" (p), "r" (newval), "r" (oldval)
+	   : "cc", "memory");
+  return result;
+}
+
+#endif /* atomicity.h */
diff --git a/libc/sysdeps/linux/arm/bits/machine-gmon.h b/libc/sysdeps/linux/arm/bits/machine-gmon.h
new file mode 100644
index 000000000..039dfd951
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/machine-gmon.h
@@ -0,0 +1,67 @@
+/* Machine-dependent definitions for profiling support.  ARM version.
+   Copyright (C) 1996, 1997, 1998 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>
+#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
+
+static void mcount_internal (u_long frompc, u_long selfpc);
+
+#define _MCOUNT_DECL(frompc, selfpc) \
+static void mcount_internal (u_long frompc, u_long selfpc)
+
+/* This macro/func MUST save r0, r1 because the compiler inserts
+	blind calls to _mount(), ignoring the fact that _mcount may
+	clobber registers; therefore, _mcount may NOT clobber registers */
+/* if (this_fp!=0) {
+	r0 = this_fp
+	r1 = this_lr
+  	r1 = [r1-4] which is caller's lr 
+	if (r1!=0) 
+		r1 = caller's lr
+	call mcount_internal(this_lr, caller's_lr)
+   }
+*/
+
+#define MCOUNT								\
+void _mcount (void)							\
+{									\
+  __asm__("stmdb	sp!, {r0, r1, r2, r3};"				\
+	  "movs		fp, fp;"				      	\
+          "moveq	r1, #0;"					\
+	  "ldrne	r1, [fp, $-4];"					\
+	  "ldrne	r0, [fp, $-12];"				\
+	  "movnes	r0, r0;"					\
+	  "ldrne	r0, [r0, $-4];"					\
+	  "movs		r0, r0;"					\
+	  "blne		mcount_internal;"				\
+	  "ldmia	sp!, {r0, r1, r2, r3}");			\
+}
+
diff --git a/libc/sysdeps/linux/arm/bits/profil-counter.h b/libc/sysdeps/linux/arm/bits/profil-counter.h
new file mode 100644
index 000000000..5d8be9dba
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/profil-counter.h
@@ -0,0 +1,32 @@
+/* Low-level statistical profiling support function.  Linux/ARM version.
+   Copyright (C) 1996, 1997, 1998 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.  */
+
+#include <signal.h>
+#include <bits/armsigctx.h>
+
+void
+profil_counter (int signo, int _a2, int _a3, int _a4, union k_sigcontext sc)
+{
+  void *pc;
+  if (sc.v20.magic == SIGCONTEXT_2_0_MAGIC)
+    pc = (void *) sc.v20.reg.ARM_pc;
+  else
+    pc = (void *) sc.v21.arm_pc;
+  profil_count (pc);
+}
diff --git a/libc/sysdeps/linux/arm/bits/sigcontextinfo.h b/libc/sysdeps/linux/arm/bits/sigcontextinfo.h
new file mode 100644
index 000000000..aebc3cfd5
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/sigcontextinfo.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Philip Blundell <philb@gnu.org>, 1999.
+
+   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.  */
+
+#include <bits/armsigctx.h>
+
+#define SIGCONTEXT int _a2, int _a3, int _a4, union k_sigcontext
+#define SIGCONTEXT_EXTRA_ARGS _a2, _a3, _a4,
+
+#define GET_PC(ctx)	((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
+			 ctx.v20.reg.ARM_pc : ctx.v21.arm_pc))
+#define GET_FRAME(ctx)	\
+	ADVANCE_STACK_FRAME((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
+			 ctx.v20.reg.ARM_fp : ctx.v21.arm_fp))
+#define GET_STACK(ctx)	((void *)((ctx.v20.magic == SIGCONTEXT_2_0_MAGIC) ? \
+			 ctx.v20.reg.ARM_sp : ctx.v21.arm_sp))
+#define ADVANCE_STACK_FRAME(frm)	\
+			((struct layout *)frm - 1)
+#define CALL_SIGHANDLER(handler, signo, ctx) \
+  (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))
diff --git a/libc/sysdeps/linux/arm/bits/stackinfo.h b/libc/sysdeps/linux/arm/bits/stackinfo.h
new file mode 100644
index 000000000..2410ba9bd
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/stackinfo.h
@@ -0,0 +1,28 @@
+/* Copyright (C) 2001 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.  */
+
+/* This file contains a bit of information about the stack allocation
+   of the processor.  */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H	1
+
+/* On Arm the stack grows down.  */
+#define _STACK_GROWS_DOWN	1
+
+#endif	/* stackinfo.h */