powerpc: question concerning insmod

[Tallam, Sreenivas]

Hi,

Not sure if this matters, but I have taken the stock busybox-1.10.2 and
built it using 

"make CROSS_COMPILE=ppc_405-  "
Do not use any other parameter at the end of ppc_405-

I have compiled on a host system 

# cat /etc/redhat-release
Red Hat Enterprise Linux WS release 4 (Nahant Update 3)

Hope this helps!!

Thanks,
Sreen


-----Original Message-----
From: beck0778 at umn.edu [mailto:beck0778 at umn.edu] 
Sent: Thursday, July 03, 2008 12:57 PM
To: busybox at busybox.net
Subject: powerpc: question concerning insmod

Hello,

I am attempting to build busybox-1.11.0 for powerpc. I have
unsuccessfully
tried:

1) custom-built cross compiling toolchain built with crosstool (gcc
4.1.0, glibc 2.3.6)

2) vendor-provided cross compiling toolchain (gcc 3.4.3, glibc 2.3.3)

3) vendor-provided native powerpc toolchain (gcc 3.4.3, glibc 2.3.3)

For the cross compilers, I'm trying to build with:
$ make ARCH=powerpc CROSS_COMPILE=powerpc-405-linux-gnu-

For the native compiler, I'm just using:
$ make

I am getting an error while compiling the file modutils/insmod.c using
any of these toolchains:

For all three toolchains, I get the following error messages:

  CC modutils/insmod.o modutils/insmod.c: In function
'arch_apply_relocation': modutils/insmod.c:864: error: 'ifile'
undeclared (first use in this function) modutils/insmod.c:864: error:
(Each undeclared identifier is reported only once modutils/insmod.c:864:
error: for each function it appears in.) modutils/insmod.c:836: warning:
unused parameter 'f' make[1]: *** [modutils/insmod.o] Error 1 make: ***
[modutils] Error 2

I looked into the source file indicated, and it seems like the variable
ifile is defined in this section, which does not include a " ||
defined(__powerpc__)" condition:

#if defined(__arm__) || defined(__i386__) || defined(__mc68000__) \  ||
defined(__sh__) || defined(__s390__) || defined(__x86_64__)
        struct arch_file *ifile = (struct arch_file *) f; #endif


The error line is 864:
#if defined(USE_PLT_ENTRIES)
        ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0;
        unsigned long *ip;
...
#endif

If we look up near the top, we see:

#elif defined(__powerpc__)
#define MATCH_MACHINE(x) (x == EM_PPC)
#define SHT_RELM        SHT_RELA
#define Elf32_RelM      Elf32_Rela
#define ELFCLASSM       ELFCLASS32
#define USE_PLT_ENTRIES
#define PLT_ENTRY_SIZE 16
#define USE_PLT_LIST
#define LIST_ARCHTYPE ElfW(Addr)
#define USE_LIST
#define ARCHDATAM       "__ftr_fixup"
#endif

Here it looks like USE_PLT_ENTRIES is defined for powerpc, but the ifile
variable isn't defined for powerpc.

I'm guessing that someone else has had success cross compiling
busybox-1.11.0 for powerpc, and this is a problem with my setup. If
anyone has run into this before, or has any suggestions, I would really
appreciate any help.

Thank you in advance,
Matthew

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