[Qemu-devel] User mode restart execution

[John Vele]

Grettings,

I am using user mode qemu for running stand-alone i386 binaries in linux.
What I want to do is this:
I want to run a binary until it ends,  but I don't want qemu-i386 to exit
(that is what
it does normally) but restart the execution of the same binary from the
beginning
without exiting.
I tried to modify the source code (where it starts to execute a loaded
binary) but
I don't know what variables or structs must be reinitialized in order to
start the
execution from the beginning of binary without exiting.
Any comment will be very very helpuf.

Thanx in advance

[Qemu-devel] Compile qemu-i386 as library

[John Vele]

Greetings,

I want to compile the i386 linux user part of qemu as a library (Shared or
static) to use it with other applications.
(Right now it produces a ./i386-linux-user/qemu-i386 executable).
Anyone does know if this is possible?
Which Makefile shall I edit?

Thanx in advance

[Qemu-devel] Print input opcodes before translation

[John Vele]

Greetings,

I'm using qemu user mode for i386 and I would like to print the opcodes of
an
input executable one bye one before any translation.
Is the file target-i386/translate.c the one that I shall edit? The function
disas_insn()
in the same file is the appropriate one?

Thanx in advance

[Qemu-devel] Print inpit assembly

[John Vele]

Hello to all,

I am using i386 linux user mode to run linux i386 binaries.
I was wondering if there is way to print the input assembly of the
executable.

I run:  ./i386-linux-user/qemu-i386 -d in_asm ../executable
but I don't know exactly what in_asm stands for:
is it the exact assembly of the executable before any processing by the Qemu
or it is an input assembly after some processing?

Thanx in advance

[Qemu-devel] Execute a char buffer without loading ELF

[John Vele]

Hello,

I am involved in a project that we use Qemu user mode for i386
(./i386-linux-user/qemu-i386). I want to modify the source code
in such a way to make qemu execute a buffer of bytes (given from the comman
line for example) rather than loading
an ELF file and executing. I started looking at linux-user/linuxload.c
loader_exec() function  and linux-user/elfload.c load_elf_binary()
function. Is there a way to bypass the loading of an ELF file and load a
single buffer of bytes (that is i386 code) into memory
and make Qemu start execution on it?

Any help or comment is very very appreciated.

Thanx in advance