Date: Sun, 19 May 2002 11:57:00 +0100
From: Laurynas Biveinis <lauras AT softhome DOT net>
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To: Charles Sandmann <sandmann AT clio DOT rice DOT edu>,
   Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
CC: djgpp-workers AT delorie DOT com
Subject: Re[2]: emacs under w2k
In-Reply-To: <3759-Thu16May2002215345+0300-eliz@is.elta.co.il>
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Precedence: bulk

> I'd use `stepi' to step by machine instructions, and see which one
> explodes.

Here it is, at least the type of failure has changed. Now it is
SIGTRAP, and it does not take down gdb. Is the lcall jump address
calculated incorrectly or what?

Laurynas

(gdb) r
Starting program: d:/devel/djgpp/gnu/emacs/src/../bin/emacs.exe

Breakpoint 2, __default_morecore (increment=118664) at gmalloc.c:1575
1575      __ptr_t result = (__ptr_t) __sbrk (increment);
1: x/i $eip  0xee869 <__default_morecore+9>:    add    $0xfffffff4,%esp
(gdb) stepi
0x000ee86c      1575      __ptr_t result = (__ptr_t) __sbrk (increment);
1: x/i $eip  0xee86c <__default_morecore+12>:   push   %eax
(gdb)
0x000ee86d      1575      __ptr_t result = (__ptr_t) __sbrk (increment);
1: x/i $eip  0xee86d <__default_morecore+13>:   call   0xfc540 <sbrk>
(gdb)
0x000fc540 in sbrk ()
1: x/i $eip  0xfc540 <sbrk>:    jmp    0x1390 <__sbrk>
(gdb)
0x00001390 in __sbrk ()
1: x/i $eip  0x1390 <__sbrk>:   mov    0x10f0d6,%eax
(gdb)
0x00001395 in __sbrk ()
1: x/i $eip  0x1395 <__sbrk+5>: mov    0x4(%esp,1),%ecx
(gdb)
0x00001399 in __sbrk ()
1: x/i $eip  0x1399 <__sbrk+9>: add    %ecx,%eax
0x00001399 in __sbrk ()
1: x/i $eip  0x1399 <__sbrk+9>: add    %ecx,%eax
(gdb)
0x0000139b in __sbrk ()
1: x/i $eip  0x139b <__sbrk+11>:        jae    0x13b0 <brk_common>
(gdb)
0x000013b0 in brk_common ()
1: x/i $eip  0x13b0 <brk_common>:       push   %esi
(gdb)
0x000013b1 in brk_common ()
1: x/i $eip  0x13b1 <brk_common+1>:     push   %edi
(gdb)
0x000013b2 in brk_common ()
1: x/i $eip  0x13b2 <brk_common+2>:     push   %ebx
(gdb)
0x000013b3 in brk_common ()
1: x/i $eip  0x13b3 <brk_common+3>:     mov    0x10f0d6,%edx
(gdb)
0x000013b9 in brk_common ()
1: x/i $eip  0x13b9 <brk_common+9>:     mov    %edx,0x1d4820
(gdb)
0x000013bf in brk_common ()
1: x/i $eip  0x13bf <brk_common+15>:    mov    %eax,0x10f0d6
(gdb)
0x000013bf in brk_common ()
1: x/i $eip  0x13bf <brk_common+15>:    mov    %eax,0x10f0d6
(gdb)
0x000013c4 in brk_common ()
1: x/i $eip  0x13c4 <brk_common+20>:    jb     0x145b <brk_common+171>
(gdb)
0x000013ca in brk_common ()
1: x/i $eip  0x13ca <brk_common+26>:    cmp    0x1d4824,%eax
(gdb)
0x000013d0 in brk_common ()
1: x/i $eip  0x13d0 <brk_common+32>:    jbe    0x159c <brk_nochange>
(gdb)
0x000013d6 in brk_common ()
1: x/i $eip  0x13d6 <brk_common+38>:    testb  $0x8,0x1d2441
(gdb)
0x000013dd in brk_common ()
1: x/i $eip  0x13dd <brk_common+45>:    je     0x145b <brk_common+171>
(gdb)
0x000013df in brk_common ()
1: x/i $eip  0x13df <brk_common+47>:    add    $0xffff,%eax
0x000013df in brk_common ()
1: x/i $eip  0x13df <brk_common+47>:    add    $0xffff,%eax
(gdb)
0x000013e4 in brk_common ()
1: x/i $eip  0x13e4 <brk_common+52>:    and    $0xffff0000,%eax
(gdb)
0x000013e9 in brk_common ()
1: x/i $eip  0x13e9 <brk_common+57>:    push   %eax
(gdb)
0x000013ea in brk_common ()
1: x/i $eip  0x13ea <brk_common+58>:    mov    0x205d0c,%edi
(gdb)
0x000013f0 in brk_common ()
1: x/i $eip  0x13f0 <brk_common+64>:    mov    0x205d0e,%si
(gdb)
0x000013f7 in brk_common ()
1: x/i $eip  0x13f7 <brk_common+71>:    mov    %eax,%ecx
(gdb)
0x000013f9 in brk_common ()
1: x/i $eip  0x13f9 <brk_common+73>:    mov    %eax,%ebx
(gdb)
0x000013fb in brk_common ()
1: x/i $eip  0x13fb <brk_common+75>:    shr    $0x10,%ebx
(gdb)
0x000013fe in brk_common ()
1: x/i $eip  0x13fe <brk_common+78>:    mov    $0x900,%ax
(gdb)
0x00001402 in brk_common ()
1: x/i $eip  0x1402 <brk_common+82>:    int    $0x31
(gdb)
0x00001404 in brk_common ()
1: x/i $eip  0x1404 <brk_common+84>:    push   %eax
(gdb)
0x00001405 in brk_common ()
1: x/i $eip  0x1405 <brk_common+85>:    lcall  *0x10f080
(gdb)
Exiting due to signal SIGTRAP
Debug at eip=00000012
eax=00500901 ebx=00000050 ecx=00500000 edx=004e0078 esi=004e0177 edi=01771b20
ebp=004dfc70 esp=004dfc38 program=d:\devel\djgpp\gnu\emacs\BIN\emacs.exe
cs: sel=01ff  base=0000db60  limit=0000026f
ds: sel=01f7  base=02dd0000  limit=004effff
es: sel=01f7  base=02dd0000  limit=004effff
fs: sel=01cf  base=00009b50  limit=00003fff
gs: sel=0217  base=00000000  limit=0010ffff
ss: sel=01f7  base=02dd0000  limit=004effff
App stack: [004e0054..00460054]  Exceptn stack: [002127b0..00210870]


Program exited with code 0377.