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From: Vladimir Prus <vladimir@codesourcery.com>
To: gdb@sources.redhat.com
Subject: Re: Does m68klinux-tdep.c handle uclinux too
Date: Thu, 10 Dec 2009 11:13:00 -0000
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On Thursday 10 December 2009 12:52:29 Vladimir Prus wrote:

> 
> Hi,
> 
> looking at m68klinux-tdep.c, I see this:
> 
>   if (target_is_uclinux == -1)
>     {
>       /* Determine whether we are running on a uClinux or normal GNU/Linux
>          target so we can use the correct sigcontext layouts.  */
>       CORE_ADDR dummy;
> 
>       target_is_uclinux
>         = (target_auxv_search (&current_target, AT_NULL, &dummy) > 0
> 	   && target_auxv_search (&current_target, AT_PAGESZ, &dummy) == 0);
>     }
> 
> However, looking at configure.tgt, I see:
> 
> m68*-*-aout* | m68*-*-coff* | m68*-*-elf* | m68*-*-rtems* | m68*-*-uclinux* | \
> fido-*-elf*)
> 	# Target: Motorola m68k embedded (e.g. bug monitors)
> 	gdb_target_obs="m68k-tdep.o monitor.o dbug-rom.o dsrec.o"
> 	;;
> 
> 
> So, it seems that m68klinux-tdep.c is not even compiled for uclinux target.
> Then, is something here that needs fixing?

FWIW, below is a local patch that we have. Does it seem reasonable?

- Volodya

--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -280,12 +280,12 @@ m68hc11*-*-*|m6811*-*-*)
        gdb_sim=../sim/m68hc11/libsim.a
        ;;

-m68*-*-aout* | m68*-*-coff* | m68*-*-elf* | m68*-*-rtems* | m68*-*-uclinux* | \
+m68*-*-aout* | m68*-*-coff* | m68*-*-elf* | m68*-*-rtems* | \
 fido-*-elf*)
        # Target: Motorola m68k embedded (e.g. bug monitors)
        gdb_target_obs="m68k-tdep.o monitor.o dbug-rom.o dsrec.o"
        ;;
-m68*-*-linux*)
+m68*-*-linux* | m68*-*-uclinux*)
        # Target: Motorola m68k with a.out and ELF
        gdb_target_obs="m68k-tdep.o m68klinux-tdep.o solib.o solib-svr4.o \
                        glibc-tdep.o symfile-mem.o"
@@ -616,6 +616,7 @@ esac
 case "${targ}" in
 *-*-freebsd*)  gdb_osabi=GDB_OSABI_FREEBSD_ELF ;;
 *-*-linux*)    gdb_osabi=GDB_OSABI_LINUX ;;
+*-*-uclinux*)  gdb_osabi=GDB_OSABI_LINUX ;;
 *-*-nto*)      gdb_osabi=GDB_OSABI_QNXNTO ;;
 m68*-*-openbsd* | m88*-*-openbsd* | vax-*-openbsd*) ;;
 *-*-openbsd*)  gdb_osabi=GDB_OSABI_OPENBSD_ELF ;;