[Barrelfish-users] Barrelfish OS-gdb session

[Vishwas K.M.]

Hello Stefan,
 
Thanks for the info. I progressed few steps and got stuck with “Remote 'g' packet reply is too long: “
 
I did the following:
 
make debugsim
file x86_64/sbin/elver
l
b 1
b 100
info breakpoints
info sources
c
 
it breaks at execution line 1 and type n to next or s to step into the function - 
 
(gdb) file x86_64/sbin/elver
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from /home/sarmaji/barrelfish/build/x86_64/sbin/elver...done.
(gdb) b 1
Breakpoint 1 at 0x10000c: file ../tools/elver/boot.S, line 1.
(gdb) b 100
Breakpoint 2 at 0x10006f: file ../tools/elver/boot.S, line 100.
(gdb) info breakpoints
Num     Type           Disp Enb Address    What
1       breakpoint     keep y   0x0010000c ../tools/elver/boot.S:1
2       breakpoint     keep y   0x0010006f ../tools/elver/boot.S:100
(gdb) c
Continuing.
Found Realtek 8029 at 0xc000, ROM address 0xae00
Probing...[Realtek 8029]
NE2000 base 0xc000, addr 52:54:00:12:34:56
Address: 10.0.2.15
Netmask: 255.255.255.0
Server: 10.0.2.2
Gateway: 10.0.2.2
Address: 10.0.2.15
Netmask: 255.255.255.0
Server: 10.0.2.2
Gateway: 10.0.2.2
  Booting 'Chain-load /menu.lst from TFTP'
 
root  (nd)
Filesystem type is tftp, using whole disk
configfile (nd)/menu.lst
TFTP error 1 (File not found)
  Booting 'Barrelfish'
 
root (nd)
Filesystem type is tftp, using whole disk
kernel /x86_64/sbin/elver loglevel=5 logmask=1
   [Multiboot-elf, <0x100000:0x2560:0x0>, <0x103fe4:0x1c:0x6000>, shtab=0x10a2f
8, entry=0x10000c]
module /x86_64/sbin/cpu loglevel=5 logmask=1
------------------------
------------------------
------------------------
------------------------
   [Multiboot-module @ 0x5b86000, 0x539760 bytes]
module /x86_64/sbin/fish loglevel=5 logmask=1
   [Multiboot-module @ 0x60c0000, 0x84b1bf bytes]
 
 
Breakpoint 1, start () at ../tools/elver/boot.S:39
39              movl    $(stack + STACK_SIZE), %esp
(gdb) n
start () at ../tools/elver/boot.S:42
42              pushl   $0
(gdb) n
start () at ../tools/elver/boot.S:43
43              popf
(gdb) n
start () at ../tools/elver/boot.S:46
46              push    %ebp
(gdb) n
start () at ../tools/elver/boot.S:47
47              mov     %esp, %ebp
(gdb) n
48              push    %ebx            /* Pointer to multiboot info struct */
(gdb) n
start () at ../tools/elver/boot.S:49
49              push    %eax            /* Multiboot magic value */
(gdb) n
start () at ../tools/elver/boot.S:50
50              call    startup
(gdb) n
Remote 'g' packet reply is too long:
 0000000000000000903d26000000000000000000000000003022630000000000c021630000000000903d260000000000902163000000000038216300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003022630000000000000000000000000060d440000000000006020000230000001b00000000000000000000000f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007f03000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000801f0000
I did google on this error message, they say to set the architecture to x86_64 [set architecture i386:x86-64:intel] - done, still error persists.

(gdb) show arch
The target architecture is set automatically (currently i386:x86-64)

Please assist, also I din't find the gdbinit file to check.


--------------------
Thanks and Regards, 
Vishwas K.M. 
09448535935


________________________________
From: Vishwas K.M. <vishwaskm2000 at yahoo.com>
To: "barrelfish-users at lists.inf.ethz.ch" <barrelfish-users at lists.inf.ethz.ch> 
Sent: Friday, February 28, 2014 7:07 AM
Subject: Barrelfish OS-gdb session



 
Hello All,
 
I have recently stared working on BF OS and need assistance to understand the OS internals.
 
I am using "make sim" on x86_64 and it compiles and runs the BF till it reachs the fish prompt.
 
Now to get into the BF internals I am trying to get the compiled BF code into a gdb session and start the run part so that I can get into each module and see the things.
 
Please assist me a way out..
 
Thanks,
Vishwas K.M
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