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Re: [Qemu-devel] Syscall 269
From: |
James Pellow |
Subject: |
Re: [Qemu-devel] Syscall 269 |
Date: |
Fri, 3 Dec 2004 16:05:10 -0800 |
User-agent: |
KMail/1.7.1 |
Hi Paul,
Is this closer to what you want? I saw the swap functions. I wasn't sure
what long translated to for all supported archs. Do I need to do 32/64 bit
translation? tv_sec and tv_usec are both long.
Thanks,
James Pellow
------------------------------------------------------------------------------------------------------------
diff -ruN qemu-0.6.1/linux-user/arm/syscall_nr.h
qemu-0.6.1_new/linux-user/arm/syscall_nr.h
--- qemu-0.6.1/linux-user/arm/syscall_nr.h 2004-11-14 12:51:33.000000000
-0800
+++ qemu-0.6.1_new/linux-user/arm/syscall_nr.h 2004-11-18 00:58:44.000000000
-0800
@@ -259,3 +259,5 @@
/* 254 for set_thread_area */
/* 255 for get_thread_area */
/* 256 for set_tid_address */
+#define TARGET_NR_utimes (269)
+
diff -ruN qemu-0.6.1/linux-user/i386/syscall_nr.h
qemu-0.6.1_new/linux-user/i386/syscall_nr.h
--- qemu-0.6.1/linux-user/i386/syscall_nr.h 2004-11-14 12:51:33.000000000
-0800
+++ qemu-0.6.1_new/linux-user/i386/syscall_nr.h 2004-11-18 01:28:59.000000000
-0800
@@ -271,3 +271,5 @@
#define TARGET_NR_clock_getres (TARGET_NR_timer_create+7)
#define TARGET_NR_clock_nanosleep (TARGET_NR_timer_create+8)
+#define TARGET_NR_utimes 271
+
diff -ruN qemu-0.6.1/linux-user/syscall.c qemu-0.6.1_new/linux-user/syscall.c
--- qemu-0.6.1/linux-user/syscall.c 2004-11-14 12:51:33.000000000 -0800
+++ qemu-0.6.1_new/linux-user/syscall.c 2004-12-03 15:44:37.174197904 -0800
@@ -3025,6 +3025,15 @@
case TARGET_NR_get_thread_area:
goto unimplemented_nowarn;
#endif
+ case TARGET_NR_utimes:
+ {
+ struct timeval tv;
+ struct timeval *target_tv = (struct timeval *)arg2;
+ tv.tv_sec = tswapl(target_tv->tv_sec);
+ tv.tv_usec = tswapl(target_tv->tv_usec);
+ ret = get_errno(utimes((const char *)arg1, &tv));
+ break;
+ }
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);
------------------------------------------------------------------------------------------------------------------------
On Thursday 18 November 2004 05:03 am, Paul Brook wrote:
> On Thursday 18 November 2004 09:38, James Pellow wrote:
> > Hi All,
> >
> > I am trying to chroot to a gentoo flavor of arm linux on my AMD
> > tbird-1.4GHz. I have set up binfmt_misc and qemu to allow me to do the
> > chroot, and all seems to be working well. Now I wanted to emerge some
> > stuff, and I get the following message:
> >
> > qemu: Unsupported syscall: 269.
> >
> > Looking at the arm linux kernel source, I see that 269 is utimes.
> > Looking at the source code for qemu it seems that all I have to do is to
> > add a define for TARGET_NR_utimes in all linux-user/*/syscall_nr.h and
> > then add a new case in linux-user/syscall.c.
> >
> > So, I gave it a shot. The patch is at the bottom of this message. This
> > is the first time I have looked at the qemu sources, so I am likely
> > missing something, but the patch does seem to allow emerge to work
> > properly under gentoo. If a correct implementation requires more work, I
> > am happy to do that too, just let me know. BTW, I am not subscribed to
> > this list to please CC me.
>
> You also need to do proper 32/64bit and big/little endian conversion of
> struct timeval. It happens to work in your case because arm-linux and
> i686-linux both use the same word size and endianness.
>
> Paul
--
*****************************
James A. Pellow, President
Alent Design Solutions
www.alentdesignsolutions.com
(509) 526-0682
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