[RFA/testsuite/powerpc] New gdb.arch test for prologue analysis

Joel Brobecker brobecker@gnat.com
Mon Apr 19 23:58:00 GMT 2004


> Tested only on powerpc-aix, I can see :)

;-P

> > asm ("        .csect .text[PR]\n"
> >      "        .align 2\n"
> >      "        .lglobl .li_stw\n"
> >      "        .csect li_stw[DS]\n"
> >      "li_stw:\n"
> >      "        .long .li_stw, TOC[tc0], 0\n"
> >      "        .csect .text[PR]\n"
> >      ".li_stw:\n"
> >      "        stw 31,-4(1)\n"
> >      "        stwu 1,-48(1)\n"
> >      "        mr 31,1\n"
> >      "        stw 11,24(31)\n"
> >      "        li 0,8765\n"
> >      "        stw 0,28(31)\n"
> >      "        lwz 1,0(1)\n"
> >      "        lwz 31,-4(1)\n"
> >      "        blr\n");
> 
> AIX functions look distinctly unlike other (32-bit) PowerPC functions,
> because AIX uses function descriptors and powerpc-eabi/powerpc-linux/etc
> do not.  This is only valid for AIX.

I knew it was too easy...

> You should either find a way to make it work on both - unlikely to be
> worth the trouble - or call this file something AIX specific.

Here's a new version of the new files, where the files were renamed
to include aix. I also changed the check at the begining of the testcase
to only activate the test for powerpc-*-aix* targets.

2004-04-19  Joel Brobecker  <brobecker@gnat.com>

        * gdb.arch/powerpc-aix-prologue.c: New file.
        * gdb.arch/powerpc-aix-prologue.exp: New file.

2004-04-19  Joel Brobecker  <brobecker@gnat.com>

        * config/djgpp/fnchange.lst: Add translation rules for
        gdb.arch/powerpc-aix-prologue.c and gdb.arch/powerpc-aix-prologue.exp.

-- 
Joel
-------------- next part --------------
/* This testcase is part of GDB, the GNU debugger.

   Copyright 2004 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Please email any bugs, comments, and/or additions to this file to:
   bug-gdb@prep.ai.mit.edu  */

void li_stw (void);

int
main (void)
{
  li_stw ();
  return 0;
}

/* Asm for procedure li_stw().

   The purpose of this function is to verify that GDB does not
   include the li insn as part of the function prologue (only part
   of the prologue if part of a pair of insns saving vector registers).
   Similarly, GDB should not include the stw insn following the li insn,
   because the source register is not used for parameter passing.  */


asm ("        .csect .text[PR]\n"
     "        .align 2\n"
     "        .lglobl .li_stw\n"
     "        .csect li_stw[DS]\n"
     "li_stw:\n"
     "        .long .li_stw, TOC[tc0], 0\n"
     "        .csect .text[PR]\n"
     ".li_stw:\n"
     "        stw 31,-4(1)\n"
     "        stwu 1,-48(1)\n"
     "        mr 31,1\n"
     "        stw 11,24(31)\n"
     "        li 0,8765\n"
     "        stw 0,28(31)\n"
     "        lwz 1,0(1)\n"
     "        lwz 31,-4(1)\n"
     "        blr\n");

-------------- next part --------------
# Copyright 2004 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
#
# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@gnu.org
#
# This file is part of the gdb testsuite.

if $tracelevel {
    strace $tracelevel
}

# Test rs6000 prologue analyzer.

set prms_id 0
set bug_id 0

if ![istarget "powerpc-*-aix*"] then {
    verbose "Skipping powerpc-aix prologue tests."
    return
}

set testfile "powerpc-aix-prologue"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {
    unsupported "Testcase compile failed."
    return -1
}

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# Insert a breakpoint in FUNCTION and verifies that the breakpoint was
# inserted at the expected location.  EXPECTED_LOCATION should be an
# offset relative to the function start address.
proc insert_breakpoint {function expected_location} {
    global gdb_prompt
    global expect_out
    global hex
    
    set address ""

    # Insert a breakpoint using the given function name, and extract
    # the breakpoint address for the output.
    gdb_test_multiple "break $function" "set breakpoint in $function" {
        -re "Breakpoint 1 at ($hex).*$gdb_prompt $" {
            set address $expect_out(1,string)
        }
        default {
            fail "set breakpoint in $function"
        }
    }

    # If we managed to get the breakpoing address, then check that
    # we inserted it at the expected location by examining the
    # instruction at that address (we're not interested in the insn
    # itself, but rather at the address printed at the begining of
    # the instruction).
    if { $address != "" } then {
       gdb_test "x /i $address" \
                ".*<$function\\+$expected_location>.*" \
                "check $function breakpoint address"
    } else {
       fail "unable to compute breakpoint address"
    }

}

insert_breakpoint "li_stw" 12
-------------- next part --------------
Index: config/djgpp/fnchange.lst
===================================================================
RCS file: /cvs/src/src/gdb/config/djgpp/fnchange.lst,v
retrieving revision 1.69
diff -u -r1.69 fnchange.lst
--- config/djgpp/fnchange.lst	28 Feb 2004 18:01:48 -0000	1.69
+++ config/djgpp/fnchange.lst	19 Apr 2004 23:52:26 -0000
@@ -188,6 +188,8 @@
 @V@/gdb/testsuite/gdb.arch/altivec-abi.exp @V@/gdb/testsuite/gdb.arch/av-abi.exp
 @V@/gdb/testsuite/gdb.arch/altivec-regs.c @V@/gdb/testsuite/gdb.arch/av-regs.c
 @V@/gdb/testsuite/gdb.arch/altivec-regs.exp @V@/gdb/testsuite/gdb.arch/av-regs.exp
+@V@/gdb/testsuite/gdb.arch/powerpc-aix-prologue.exp @V@/gdb/testsuite/gdb.arch/ppcaprol.exp
+@V@/gdb/testsuite/gdb.arch/powerpc-aix-prologue.c @V@/gdb/testsuite/gdb.arch/ppcaprol.c
 @V@/gdb/testsuite/gdb.base/coremaker2.c @V@/gdb/testsuite/gdb.base/core2maker.c
 @V@/gdb/testsuite/gdb.cp/m-static1.cc @V@/gdb/testsuite/gdb.cp/m-stat1.cc
 @V@/gdb/testsuite/gdb.cp/namespace1.cc @V@/gdb/testsuite/gdb.cp/namesp1.cc


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