aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/ia64/_mcount.S
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2000-08-01 03:16:27 +0000
committerUlrich Drepper <drepper@redhat.com>2000-08-01 03:16:27 +0000
commited80b9ee77e1b453abd44ac9ed0eaead0ba24941 (patch)
tree10eb5b48f99966948a05beacd01758623b2a933a /sysdeps/ia64/_mcount.S
parenta535ce141fc6862a2013dacbed935b9aafb6a8f1 (diff)
downloadglibc-ed80b9ee77e1b453abd44ac9ed0eaead0ba24941.tar
glibc-ed80b9ee77e1b453abd44ac9ed0eaead0ba24941.tar.gz
glibc-ed80b9ee77e1b453abd44ac9ed0eaead0ba24941.tar.bz2
glibc-ed80b9ee77e1b453abd44ac9ed0eaead0ba24941.zip
Update.
2000-07-31 Jes Sorensen <jes@linuxcare.com> * sysdeps/ia64/elf/initfini.c: Kill dummy section since align and endp statements have already been added. 2000-04-18 David Mosberger <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/sysdep.h: Include <sysdeps/ia64/sysdep.h>. * sysdeps/ia64/_mcount.S: New file. * sysdeps/ia64/elf/initfini.c (_init): Preserve gp around call to __gmon_start__. Fix up extraneous whitespace. 2000-01-12 H.J. Lu <hjl@gnu.org> * sysdeps/ia64/elf/initfini.c: New file. 2000-07-31 Jes Sorensen <jes@linuxcare.com> * sysdeps/unix/sysv/linux/ia64/clone.S: Add stop bit to avoid WAW dependency between branch and ar.pfs write.
Diffstat (limited to 'sysdeps/ia64/_mcount.S')
-rw-r--r--sysdeps/ia64/_mcount.S87
1 files changed, 87 insertions, 0 deletions
diff --git a/sysdeps/ia64/_mcount.S b/sysdeps/ia64/_mcount.S
new file mode 100644
index 0000000000..5d0a26ad87
--- /dev/null
+++ b/sysdeps/ia64/_mcount.S
@@ -0,0 +1,87 @@
+/* Machine-specific calling sequence for `mcount' profiling function. ia64
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by David Mosberger <davidm@hpl.hp.com>
+ 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Assembly stub to invoke _mcount(). Compiler generated code calls
+ this stub before executing a function's prologue and without saving
+ any registers. It is therefore necessary to preserve the input
+ registers as they may contain function arguments. To work
+ correctly with frame-less functions, it is also necessary to
+ preserve the return pointer (b0 aka rp).
+
+ State upon entering _mcount:
+
+ r8 address of return value structure (used only when called
+ function returns a large structure)
+ r15 static link (used only for nested functions)
+ in0 ar.pfs to restore before returning to the function that
+ called _mcount
+ in1 gp value to restore before returning to the function that
+ called _mcount
+ in2 return address in the function that invoked the caller
+ of _mcount (frompc)
+ in3 address of the global-offset table entry that holds the
+ profile count dword allocated by the compiler; to get
+ the address of this dword, use "ld8 in2=[in2]; this
+ dword can be used in any way by _mcount (including
+ not at all, as is the case with the current implementation)
+ b0 address to return to after _mcount is done
+*/
+
+#include <sysdep.h>
+
+#undef ret
+
+ .psr abi64
+ .psr lsb
+ .lsb
+
+LEAF(_mcount)
+ alloc loc0 = ar.pfs, 4, 4, 3, 0
+ mov loc1 = rp
+ mov loc2 = r8 // gcc uses r8 to pass pointer to return structure
+ ;;
+ mov loc3 = r15 // gcc uses r15 to pass the static link to nested functions
+ mov out0 = in2
+ mov out1 = rp
+ br.call.sptk.few rp = __mcount_internal
+ ;;
+.here:
+{
+ .mii
+ mov gp = in1
+ mov r2 = ip
+ mov ar.pfs = loc0
+}
+ ;;
+ adds r2 = 1f - .here, r2
+ mov b7 = loc1
+ mov rp = in2
+ ;;
+ mov r8 = loc2
+ mov r15 = loc3
+ mov b6 = r2
+ br.ret.sptk.few b6
+
+1: alloc r2 = ar.pfs, 0, 0, 9, 0
+ mov ar.pfs = r40
+ br b7
+END(_mcount)
+
+weak_alias (_mcount, mcount)