Cian a écrit :
Hi Guillame,
Hi Cian.
On Fri, Jan 1, 2010 at 3:48 PM, Guillaume Yziquel
<[email protected]> wrote:
Googling around, I found:
http://www.vikaskumar.org/amd64/sample.htm
Looks like a nice resource, note the links to the x86-64 ABI docs at
http://www.x86-64.org/documentation.html - these are worth reading.
Yes. Already read them (though not in full detail). They are indeed
worth reading.
The thing that I'd like to know is the following:
-1- The syscall numbers are different. Where do you get the list of syscall
numbers?
Under Linux, you should find these via /usr/include/sys/syscall.h.
Note that you may need to follow a couple of #include redirections
from there. For example, on my Ubuntu 8.10 Intrepid install the actual
list of 64bit syscalls is in /usr/include/asm/unistd_64.h, which ends
up getting included (via a somewhat circuitous route) into
sys/syscall.h.
'locate unistd.h | grep x86_64' has also been rather useful on Debian.
-2- Would you believe useful to include a few info in PGU for amd64? (How to
make syscalls, where to find the syscalls numbers, etc...)
I think this would be (increasingly) useful.
Indeed.
However, I'd like to point out something that happens with the power.s
code in th PGU book, page 59. I just typed the same code litterally, and
I get:
as power.s -o power.o
power.s: Assembler messages:
power.s:14: Error: suffix or operands invalid for `push'
power.s:15: Error: suffix or operands invalid for `push'
power.s:18: Error: suffix or operands invalid for `push'
power.s:21: Error: suffix or operands invalid for `push'
power.s:22: Error: suffix or operands invalid for `push'
power.s:26: Error: suffix or operands invalid for `pop'
power.s:59: Error: suffix or operands invalid for `push'
power.s:82: Error: suffix or operands invalid for `pop'
make: *** [power.o] Erreur 1
It seems that as doesn't like at all stuff like pushl as popl.
Is it because I'm on amd64? If so, how can I deal with it?
All the best,
Guillaume Yziquel.
--
Guillaume Yziquel
http://yziquel.homelinux.org/
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