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Date: Thu, 21 Sep 2006 01:05:27 +0400
From: Mitch <Mitch@...ts.COM>
To: jdike@...toit.com, brugolsky@...emetry-investments.com,
linux-kernel@...r.kernel.org
Subject: Re: UML build failure with 2.6.18
Hi Jeff,
That works perfectly as did the previous patch. I knew how to fix the
problem anyhow, just wanted to know why i/if was the only person having
thr problem. I'm running glibc-2.3.6 and gcc-4.0.3.
Cheers
Mithc
-------- Original Message --------
Subject: Re: UML build failure with 2.6.18
Date: Wed, 20 Sep 2006 13:40:26 -0400
From: Jeff Dike <jdike@...toit.com>
To: Mitch <Mitch@...ts.COM>
CC: linux-kernel@...r.kernel.org, "Bill Rugolsky Jr."
<brugolsky@...emetry-investments.com>
References: <45115EC7.2010407@...ts.COM>
On Wed, Sep 20, 2006 at 07:31:19PM +0400, Mitch wrote:
> It's no distro (built up myself, so you can assume a gentoo type build).
> I'm building from scratch, so it should use no headers since i'm
> building a kernel.
UML interacts with the host, by making system calls, so it needs the
host's libc headers.
Try the patch below.
Jeff
Index: linux-2.6.17/arch/um/os-Linux/process.c
===================================================================
--- linux-2.6.17.orig/arch/um/os-Linux/process.c 2006-09-20
11:15:08.000000000 -0400
+++ linux-2.6.17/arch/um/os-Linux/process.c 2006-09-20
13:35:24.000000000 -0400
@@ -140,11 +140,9 @@ void os_usr1_process(int pid)
* syscalls, and also breaks with clone(), which does not unshare the TLS.
*/
-inline _syscall0(pid_t, getpid)
-
int os_getpid(void)
{
- return(getpid());
+ return syscall(__NR_getpid);
}
int os_getpgrp(void)
Index: linux-2.6.17/arch/um/os-Linux/sys-i386/tls.c
===================================================================
--- linux-2.6.17.orig/arch/um/os-Linux/sys-i386/tls.c 2006-06-18
13:49:35.000000000 -0400
+++ linux-2.6.17/arch/um/os-Linux/sys-i386/tls.c 2006-09-20
13:37:27.000000000 -0400
@@ -3,8 +3,6 @@
#include "sysdep/tls.h"
#include "user_util.h"
-static _syscall1(int, get_thread_area, user_desc_t *, u_info);
-
/* Checks whether host supports TLS, and sets *tls_min according to
the value
* valid on the host.
* i386 host have it == 6; x86_64 host have it == 12, for i386
emulation. */
@@ -17,7 +15,7 @@ void check_host_supports_tls(int *suppor
user_desc_t info;
info.entry_number = val[i];
- if (get_thread_area(&info) == 0) {
+ if(syscall(__NR_get_thread_area, &info) == 0){
*tls_min = val[i];
*supports_tls = 1;
return;
Index: linux-2.6.17/arch/um/os-Linux/tls.c
===================================================================
--- linux-2.6.17.orig/arch/um/os-Linux/tls.c 2006-08-15
21:59:56.000000000 -0400
+++ linux-2.6.17/arch/um/os-Linux/tls.c 2006-09-20 13:37:14.000000000 -0400
@@ -48,14 +48,11 @@ int os_get_thread_area(user_desc_t *info
#ifdef UML_CONFIG_MODE_TT
#include "linux/unistd.h"
-static _syscall1(int, get_thread_area, user_desc_t *, u_info);
-static _syscall1(int, set_thread_area, user_desc_t *, u_info);
-
int do_set_thread_area_tt(user_desc_t *info)
{
int ret;
- ret = set_thread_area(info);
+ ret = syscall(__NR_set_thread_area, info);
if (ret < 0) {
ret = -errno;
}
@@ -66,7 +63,7 @@ int do_get_thread_area_tt(user_desc_t *i
{
int ret;
- ret = get_thread_area(info);
+ ret = syscall(__NR_get_thread_area, info);
if (ret < 0) {
ret = -errno;
}
-
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