gdbserver build broken on amd64-linux

Daniel Jacobowitz
Wed Oct 20 14:26:00 GMT 2004

On Tue, Oct 19, 2004 at 10:32:16PM -0700, Joel Brobecker wrote:
> The compiler fails to find a couple of macros:
> > gcc -c -Wall -g -O2    -I. -I. -I./../regformats -I./../../include -I../../bfd -I./../../bfd linux-x86-64-low.c
> > linux-x86-64-low.c: In function 'ps_get_thread_area':
> > linux-x86-64-low.c:70: error: 'ARCH_GET_FS' undeclared (first use in this function)
> > linux-x86-64-low.c:70: error: (Each undeclared identifier is reported only once
> > linux-x86-64-low.c:70: error: for each function it appears in.)
> > linux-x86-64-low.c:74: error: 'ARCH_GET_GS' undeclared (first use in this function)
> I found the definitions in asm-x86_64/prctl.h. So I #included that file,
> and the build succeeded. Looking at the name, I wasn't too enthusiastic
> about it, as it didn't look too standard, so I looked around, and saw
> that this file is included from asm/prctl.h. So I changed the #include
> to that file instead, and got the builds again.
> 2004-10-19  Joel Brobecker  <>
>         * linux-x86-64-low.c: Include asm/prctl.h.
> I hope this is the right fix, but at the same time, I can't help but
> wonder how it did work before... Let me know if this is OK to apply
> or if it is the wrong fix (I am hoping that the location of these
> macros is not dependent on the Linux distribution).

How about ths instead?

#ifndef ARCH_GET_FS
#define ARCH_SET_GS 0x1001
#define ARCH_SET_FS 0x1002
#define ARCH_GET_FS 0x1003
#define ARCH_GET_GS 0x1004

Daniel Jacobowitz

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