Problems with R3 access, in userland, on POWER8 #26
Description
Not sure if it's a regression, but trying to build libl4 on POWER8 bails out, with the following, after playing with how we consume/serve R3, in L4_SystemClock():
[root@fedora28 user]# make
make[1]: Entering directory '/root/Orion/user/lib'
make[2]: Entering directory '/root/Orion/user/lib/l4'
===> debug.cc
gcc -x c++ -I../../include -I../.. -I/usr/lib/gcc/ppc64-redhat-linux/8/include -nostdinc -g -O2 -msoft-float -mminimal-toc -fno-stack-protector -lssp -O2 -g -Wall -Wshadow -fno-stack-protector -Wconversion -fno-exceptions -c debug.cc -o debug.o
In file included from ../../include/l4/kip.h:36,
from debug.cc:31:
../../include/l4/powerpc64/syscalls.h: In function ‘L4_Clock_t L4_SystemClock()’:
../../include/l4/powerpc64/syscalls.h:165:39: error: ‘dest’ was not declared in this scope
register L4_Word_t r3 asm("r3") = dest.raw;
^~~~
../../include/l4/powerpc64/syscalls.h:172:12: error: request for member ‘raw’ in ‘r3’, which is of non-class type ‘L4_Word_t’ {aka ‘long unsigned int’}
"=r" (r3.raw)
^~~
../../include/l4/powerpc64/syscalls.h:182:13: error: address of explicit register variable ‘r3’ requested
return r3 ;
^~
../../include/l4/powerpc64/syscalls.h:182:13: error: could not convert ‘r3’ from ‘L4_Word_t’ {aka ‘long unsigned int’} to ‘L4_Clock_t’
make[2]: *** [../../Mk/l4.build.mk:58: debug.o] Error 1
make[2]: Leaving directory '/root/Orion/user/lib/l4'
make[1]: *** [../Mk/l4.subdir.mk:41: subdirs-all] Error 2
make[1]: Leaving directory '/root/Orion/user/lib'
make: *** [Mk/l4.subdir.mk:41: subdirs-all] Error 2
[root@fedora28 user]# git pull --all
Fetching origin
remote: Enumerating objects: 13, done.
remote: Counting objects: 100% (13/13), done.
remote: Compressing objects: 100% (1/1), done.
remote: Total 7 (delta 6), reused 7 (delta 6), pack-reused 0
Unpacking objects: 100% (7/7), done.
From https://github.com/vmlemon/Orion
cb0da7e..e3b6d6a master -> origin/master
Updating cb0da7e..e3b6d6a
Fast-forward
user/include/l4/powerpc64/syscalls.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
[root@fedora28 user]# make
make[1]: Entering directory '/root/Orion/user/lib'
make[2]: Entering directory '/root/Orion/user/lib/l4'
===> debug.cc
gcc -x c++ -I../../include -I../.. -I/usr/lib/gcc/ppc64-redhat-linux/8/include -nostdinc -g -O2 -msoft-float -mminimal-toc -fno-stack-protector -lssp -O2 -g -Wall -Wshadow -fno-stack-protector -Wconversion -fno-exceptions -c debug.cc -o debug.o
In file included from ../../include/l4/kip.h:36,
from debug.cc:31:
../../include/l4/powerpc64/syscalls.h: In function ‘L4_Clock_t L4_SystemClock()’:
../../include/l4/powerpc64/syscalls.h:172:12: error: request for member ‘raw’ in ‘r3’, which is of non-class type ‘L4_Word_t’ {aka ‘long unsigned int’}
"=r" (r3.raw)
^~~
../../include/l4/powerpc64/syscalls.h:182:13: error: address of explicit register variable ‘r3’ requested
return r3 ;
^~
../../include/l4/powerpc64/syscalls.h:182:13: error: could not convert ‘r3’ from ‘L4_Word_t’ {aka ‘long unsigned int’} to ‘L4_Clock_t’
make[2]: *** [../../Mk/l4.build.mk:58: debug.o] Error 1
make[2]: Leaving directory '/root/Orion/user/lib/l4'
make[1]: *** [../Mk/l4.subdir.mk:41: subdirs-all] Error 2
make[1]: Leaving directory '/root/Orion/user/lib'
make: *** [Mk/l4.subdir.mk:41: subdirs-all] Error 2
[root@fedora28 user]#