all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
* 'error in process filter: Variable binding depth exceeds max-specpdl-size' on gdb-display-memory-buffer
@ 2012-10-29 12:54 Vladimir Ulyanov
  0 siblings, 0 replies; only message in thread
From: Vladimir Ulyanov @ 2012-10-29 12:54 UTC (permalink / raw
  To: help-gnu-emacs

Hello Gentlemen,

Today I was debugging my helloworld code. Launched gdb (M-x gdb then
M-x gdb-many-windows), opened memory buffer (M-x
gdb-display-memory-buffer), breaked _start, ran and did several si
commands.
 after setting breakpoint to _start section of my assembly code the
error message 'error in process filter: Variable binding depth exceeds
max-specpdl-size' apears and the memory buffer is empty.
Please look at the screenshot here: http://ompldr.org/vZzJkeQ.

Emacs version:

emacs --version
GNU Emacs 24.2.1

Assembly 'hello world' code:

; build using these commands:
; nasm -f elf -g -F stabs eatsyscall.asm
; ld -o eatsyscall eatsyscall.o

SECTION .data       ; section containing initialized data

EatMsg: db "Eat at Joe's!", 10
EatLen: equ $-EatMsg

SECTION .bss        ; section containing uninitialized data
SECTION .text       ; section containing code

_start:
    nop             ; this no-op keeps gdb happy
    mov eax, 4      ; specify sys_write syscall
    mov ebx, 1      ; specify file descriptor 1: standard output
    mov ecx, EatMsg ; pass offset of the message
     mov edx, EatLen ; pass the length of the message
    int 80H         ; make syscall to output the text to stdout

    mov eax, 1      ; specify exit syscall
    mov ebx, 0      ; return a code of zero
    int 80H         ; make syscall to terminate the program

Steps to reproduce:

1. Open an asm file (C-x C-f <filename>.asm)
2. Switch to gdb mode (M-x gdb)
3. Switch to gdb many windows mode (M-x gdb-many-windows)
4. Open gdb memory buffer anywhere (M-x gdb-display-memory-buffer)
 5. Set breakpoint to _start section (break _start)
6. Run program from _start section (run)
7. Step to the mov eax,4 instruction (type si several times)

Also I would like to know how can I set pointer to executed
instruction in the source window of assembly. In my case (look at the
screenshot) an arrow points to _start only.

--
Vadym



^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2012-10-29 12:54 UTC | newest]

Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-10-29 12:54 'error in process filter: Variable binding depth exceeds max-specpdl-size' on gdb-display-memory-buffer Vladimir Ulyanov

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.