Created attachment 1086859 [details]
Add ppc64le target for ld in .specs

Description of problem:

ld cannot manages ppc64le objects.

$ ld -V
GNU ld version 2.25-9.fc22
  Supported emulations:
   elf64ppc
   elf32ppc
   elf32ppclinux
   elf32ppcsim
   elf32_spu

As 'as', 'gdb' and 'gcc' are able to manage little-endian code, ld is the only missing part to build/debug a ppc64le kernel on a ppc64 host.

Version-Release number of selected component (if applicable):

$ ld -v
GNU ld version 2.25-9.fc22

How reproducible:

100%

Steps to Reproduce:
1. vi le.c
static const int a = 0x12345678;

void _start(void)
{
}
2. gcc -g -nostdlib -mlittle-endian -m64 -c -o le.o le.c
3. ld -melf64lppc -o le le.o

Actual results:

ld: unrecognised emulation mode: elf64lppc
Supported emulations: elf64ppc elf32ppc elf32ppclinux elf32ppcsim elf32_spu

Expected results:

$ gcc -g -nostdlib -mlittle-endian -m64 -c -o le.o le.c
$ file le.o
le.o: ELF 64-bit LSB relocatable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), not stripped
$ ld -melf64lppc -o le le.o
$ file le
le: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), statically linked, not stripped
$ gdb le
GNU gdb (GDB) Fedora 7.9.1-19.fc22
...
(gdb) x/4xb &a
0x10000110 <a>:	0x78	0x56	0x34	0x12

On big endian we have here:

(gdb) x/4xb &a
0x10000110 <a>:	0x12	0x34	0x56	0x78

Additional info: