On Wed, 11 Nov 2009 14:43:21 -0500, David Jackson wrote:
> I am having great difficulty running a very simple assembler program
> on FreeBSD on x86 in my efforts to learn some assembly programming on
> FreeBSD. I have tried to compile the following with nasm, however i
> get nothing
Charlie Kester wrote:
On Wed 11 Nov 2009 at 17:32:41 PST Charlie Kester wrote:
One more thing:
Notice that the system call number (or any other dword) should also be
pushed onto the stack before the int 80h.
The reason for this is given at the top of the page:
although the kernel is acce
Mihai Don??u wrote:
> I don't think the kernel is the one that initializes the
> 0, 1 and 2 file descriptors (stdin, stdout and stderr).
Correct so far.
> I think you have to open them yourself ...
No, the shell does it. That's how it is able to set up
pipes and redirection.
__
On Wed 11 Nov 2009 at 17:32:41 PST Charlie Kester wrote:
One more thing:
Notice that the system call number (or any other dword) should also be
pushed onto the stack before the int 80h.
The reason for this is given at the top of the page:
although the kernel is accessed using int 80h, it
On Wed 11 Nov 2009 at 11:43:21 PST David Jackson wrote:
I am having great difficulty running a very simple assembler program
on FreeBSD on x86 in my efforts to learn some assembly programming on
FreeBSD. I have tried to compile the following with nasm, however i
get nothing in response when I
On Wednesday 11 November 2009 21:43:21 David Jackson wrote:
> I am having great difficulty running a very simple assembler program on
> FreeBSD on x86 in my efforts to learn some assembly programming on
> FreeBSD. I have tried to compile the following with nasm, however i get
>
I am having great difficulty running a very simple assembler program on
FreeBSD on x86 in my efforts to learn some assembly programming on
FreeBSD. I have tried to compile the following with nasm, however i get
nothing in response when I attempt to run this program:
section .data
I am having great difficulty running a very simple assembler program on
FreeBSD on x86 in my efforts to learn some assembly programming on
FreeBSD. I have tried to compile the following with nasm, however i get
nothing in response when I attempt to run this program:
section .data
--- Ivan Voras <[EMAIL PROTECTED]> wrote:
> Wojciech Puchar wrote:
> >> asm("pushfl; stc; int $0x13; setc %%al;
> popfl"
> >> : "+a" (ax), "+b" (bx), "=c" (cx), "+d"
> (dx)
> >> : : "esi", "edi");
> >>
> >> if ((u8)ax)
> >> return -1;/* No extended information
Wojciech Puchar wrote:
>> asm("pushfl; stc; int $0x13; setc %%al; popfl"
>> : "+a" (ax), "+b" (bx), "=c" (cx), "+d" (dx)
>> : : "esi", "edi");
>>
>> if ((u8)ax)
>> return -1;/* No extended information */
>> else
>> return 1;/* Extended information
asm("pushfl; stc; int $0x13; setc %%al; popfl"
: "+a" (ax), "+b" (bx), "=c" (cx), "+d" (dx)
: : "esi", "edi");
if ((u8)ax)
return -1; /* No extended information */
else
return 1; /* Extended information ava
Hi all
I'm trying to execute following inline assembly code
in a C function under FreeBSD 7.0:
typedef unsigned char u8;
typedef unsigned short u16;
u8 devno= 0x80;
static int check_extensions(u8 devno)
{
u16 ax, bx, cx, dx, di;
ax = 0x4100;
bx = 0x55AA;
http://asm.sourceforge.net/intro.html
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Patil, Kiran
> Sent: Thursday, June 14, 2007 2:11 PM
> To: freebsd-questions@freebsd.org
> Cc: Patil, Kiran
> Subject: Need help with GNU as
http://user.nj.net/~tms/hello.html
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Patil, Kiran
> Sent: Thursday, June 14, 2007 2:11 PM
> To: freebsd-questions@freebsd.org
> Cc: Patil, Kiran
> Subject: Need help with GNU as
Hi All,
I am trying to use GNU assembly. I am trying simple thing such as ,
moving content of memory location into general purpose register (ax).
I have following code :
struct context {
unsigned long mask[8];
} CONTEXT;
int main()
{
CONTEXT sr
openssl also uses assembler in some of it's files
Ted
- Original Message -
From: "Daniel Molina Wegener" <[EMAIL PROTECTED]>
To:
Cc: "Rico Secada" <[EMAIL PROTECTED]>
Sent: Wednesday, February 07, 2007 3:07 PM
Subject: Re: Assembly language on Free
On Wednesday 07 February 2007 19:45, Rico Secada wrote:
> Hi
>
> I am brushing up on my assembler language and I wonder if
> anyone could recommend any particular reading well suited for
> FreeBSD?
Try looking as(1) manual page, the gas info page (info gas)
and looking on the internet for guides
Rico Secada wrote:
> Hi
>
> I am brushing up on my assembler language and I wonder if anyone could
> recommend any particular reading well suited for FreeBSD?
http://www.int80h.org/bsdasm/
--
Tore
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h
Hi
I am brushing up on my assembler language and I wonder if anyone could
recommend any particular reading well suited for FreeBSD?
Best and kind regards,
Rico Secada.
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On Sun, Jan 16, 2005 at 03:28:18AM +, Street Chaman wrote:
> hi everyone,
>
> i need low level hardware control over some devices (kbd, sound, display) in
> an assembly soft, and 'd like to know where i can find a list of
> ioctl_syscall supported parameters for each d
hi everyone,
i need low level hardware control over some devices (kbd, sound, display) in
an assembly soft, and 'd like to know where i can find a list of
ioctl_syscall supported parameters for each device.
Furthermore, if someone knows some good (more complete than
developpers-handbook
> > pusheax ; Or any other dword
Heh... that of course will work too ;)
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sts me too much space. The only one I know of,
> > is PUSHA, but it pushes too many bytes.
>
> Quoting from dev-handbook:
> > But assembly language programmers like to shave off cycles. The above
> > example requires a call/ret combination. We can eliminate it by
> &g
om dev-handbook:
> But assembly language programmers like to shave off cycles. The above
> example requires a call/ret combination. We can eliminate it by
> pushing an extra dword:
>
> open:
> pushdword mode
> pushdword flags
> pushdword path
>
On Tuesday 02 March 2004 21:19, [EMAIL PROTECTED] wrote:
> Howdy,
>
> > Here it is:
> >
> > .text
> > .global _start
> > _start:
> > pushl $0
> > movl$1, %eax
> > int $0x80
> >
> > I looked everywhere (Developer's handbook, Google, ...) to find the
> > solution, but all resour
Howdy,
> Here it is:
>
> .text
> .global _start
> _start:
> pushl $0
> movl$1, %eax
> int $0x80
>
> I looked everywhere (Developer's handbook, Google, ...) to find the solution,
> but all resources I consulted tell me this is the right way to do it.
> This program, h
Hi!
I'm already a bit experienced with assembly, and started to enter my
executables directly in the hexeditor (for educational purpose only; I know
this is poor programming style).
I do not yet fully understand all aspects of the ELF header, but I managed to
somehow write workin
I thought that I found a typo in the arch-handbook and I wrote about
that to the freebsd-doc mailing list. You can read that email at
http://docs.freebsd.org/cgi/mid.cgi?20040117005106.21558.qmail
I didn't get any response yet. Maybe I'm missing something and this
isn't a typo? What is "posh" instr
Hi all
Just have some assembly questions.
Why do BSD pass arguments via the stack and not the registres like Linux
and windows?
Is there a list of what (system) calls are in the kernel and what their
numbers are?
How do I call a function I have written my self (in C++)?
Hope someone can/will
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