[Bug 220118] devel/powerpc64-gcc based buildkernel: sys/powerpc/powerpc/stack_machdep.c rejected for: '__builtin_frame_address' with a nonzero argument is unsafe

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Mon Jun 19 02:08:54 UTC 2017 

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220118

            Bug ID: 220118
           Summary: devel/powerpc64-gcc based buildkernel:
                    sys/powerpc/powerpc/stack_machdep.c rejected for:
                    '__builtin_frame_address' with a nonzero argument is
                    unsafe
           Product: Base System
           Version: CURRENT
          Hardware: powerpc
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: markmi at dsl-only.net

This is another example place with the same sort
of compiler report as bugzilla 215600 was for.
I've switched back to using WERROR to allow
the kernel to build via xtoolchain-powerpc64-gcc .
The example context is a debug kernel build.
At least this place in the kernel also needs
an update if WERROR use is to be avoided
for xtoolchain-powerpc64-gcc.

The detailed build failure material follows.

--- stack_machdep.o ---
/usr/src/sys/powerpc/powerpc/stack_machdep.c: In function 'stack_save':
/usr/src/sys/powerpc/powerpc/stack_machdep.c:113:22: error: calling
'__builtin_frame_address' with a nonzero argument is unsafe
[-Werror=frame-address]
  frame = (register_t)__builtin_frame_address(1);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
Building
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-DBG/mmu_phyp.o
. . .
--- stack_machdep.o ---
cc1: all warnings being treated as errors
. . .
--- stack_machdep.o ---
*** [stack_machdep.o] Error code 1

make[2]: stopped in
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-DBG
.ERROR_TARGET='stack_machdep.o'
.ERROR_META_FILE='/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-DBG/stack_machdep.o.meta'
.MAKE.LEVEL='2'
. . .

# Meta data file
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-DBG/stack_machdep.o.meta
CMD /usr/local/bin/powerpc64-unknown-freebsd12.0-gcc -isystem
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/include
-L/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/lib
-B/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/lib
--sysroot=/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp
-B/usr/local/powerpc64-freebsd/bin/ -c -O -pipe  -g -nostdinc  -I.
-I/usr/src/sys -I/usr/src/sys/contrib/libfdt -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -msoft-float -fPIC
-fno-omit-frame-pointer -mno-altivec -msoft-float -ffreestanding -fwrapv
-fstack-protector -gdwarf-2 -Wall -Wredundant-decls -Wnested-externs
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual
-Wundef -Wno-pointer-sign -fformat-extensions -Wmissing-include-dirs
-fdiagnostics-show-option -Wno-unknown-pragmas -Wno-error=address
-Wno-error=aggressive-loop-optimizations -Wno-error=array-bounds
-Wno-error=attributes -Wno-error=cast-qual -Wno-error=enum-compare
-Wno-error=inline -Wno-error=maybe-uninitialized -Wno-error=overflow
-Wno-error=sequence-point -Wno-error=strict-overflow
-Wno-error=unused-but-set-variable -Wno-error=misleading-indentation
-Wno-error=nonnull-compare -Wno-error=shift-overflow
-Wno-error=tautological-compare  -v -fno-common -fms-extensions
-finline-limit=15000 --param inline-unit-growth=100 --param
large-function-growth=1000 -Wa,-many -mcall-aixdesc  -std=iso9899:1999 -Werror 
/usr/src/sys/powerpc/powerpc/stack_machdep.c
CMD ctfconvert -L VERSION -g stack_machdep.o
CWD
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-DBG
TARGET stack_machdep.o
-- command output --
Using built-in specs.
COLLECT_GCC=/usr/local/bin/powerpc64-unknown-freebsd12.0-gcc
Target: powerpc64-unknown-freebsd12.0
Configured with:
/usr/obj/portswork/usr/ports/devel/powerpc64-gcc/work/gcc-6.3.0/configure
--target=powerpc64-unknown-freebsd12.0 --disable-nls --enable-languages=c,c++
--without-headers --with-gmp=/usr/local --with-pkgversion='FreeBSD Ports
Collection for powerpc64' --with-system-zlib
--with-gcc-include-dir=/usr/include/c++/v1/
--with-as=/usr/local/bin/powerpc64-freebsd-as
--with-ld=/usr/local/bin/powerpc64-freebsd-ld --prefix=/usr/local
--localstatedir=/var --mandir=/usr/local/man --infodir=/usr/local/info/
--build=amd64-unknown-freebsd12.0
Thread model: posix
gcc version 6.3.0 (FreeBSD Ports Collection for powerpc64) 
COLLECT_GCC_OPTIONS='-isystem'
'/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/include'
'-L/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/lib'
'-B'
'/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/lib'
'-B' '/usr/local/powerpc64-freebsd/bin/' '-c' '-O' '-pipe' '-g' '-nostdinc'
'-I' '.' '-I' '/usr/src/sys' '-I' '/usr/src/sys/contrib/libfdt' '-D' '_KERNEL'
'-D' 'HAVE_KERNEL_OPTION_HEADERS' '-include' 'opt_global.h' '-msoft-float'
'-fPIC' '-fno-omit-frame-pointer' '-mno-altivec' '-msoft-float'
'-ffreestanding' '-fwrapv' '-fstack-protector' '-gdwarf-2' '-Wall'
'-Wredundant-decls' '-Wnested-externs' '-Wstrict-prototypes'
'-Wmissing-prototypes' '-Wpointer-arith' '-Winline' '-Wcast-qual' '-Wundef'
'-Wno-pointer-sign' '-fformat-extensions' '-Wmissing-include-dirs'
'-fdiagnostics-show-option' '-Wno-unknown-pragmas' '-Wno-error=address'
'-Wno-error=aggressive-loop-optimizations' '-Wno-error=array-bounds'
'-Wno-error=attributes' '-Wno-error=cast-qual' '-Wno-error=enum-compare'
'-Wno-error=inline' '-Wno-error=maybe-uninitialized' '-Wno-error=overflow'
'-Wno-error=sequence-point' '-Wno-error=strict-overflow'
'-Wno-error=unused-but-set-variable' '-Wno-error=misleading-indentation'
'-Wno-error=nonnull-compare' '-Wno-error=shift-overflow'
'-Wno-error=tautological-compare' '-v' '-fno-common' '-fms-extensions'
'-finline-limit=15000' '--param' 'inline-unit-growth=100' '--param'
'large-function-growth=1000' '-mcall-aixdesc' '-std=c99' '-Werror'
 /usr/local/libexec/gcc/powerpc64-unknown-freebsd12.0/6.3.0/cc1 -quiet
-nostdinc -v -I . -I /usr/src/sys -I /usr/src/sys/contrib/libfdt -isysroot
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp
-D _KERNEL -D HAVE_KERNEL_OPTION_HEADERS -isystem
/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/include
-include opt_global.h /usr/src/sys/powerpc/powerpc/stack_machdep.c -quiet
-dumpbase stack_machdep.c -msoft-float -mno-altivec -msoft-float -mcall-aixdesc
-auxbase stack_machdep -g -gdwarf-2 -O -Wall -Wredundant-decls -Wnested-externs
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual
-Wundef -Wno-pointer-sign -Wmissing-include-dirs -Wno-unknown-pragmas
-Wno-error=address -Wno-error=aggressive-loop-optimizations
-Wno-error=array-bounds -Wno-error=attributes -Wno-error=cast-qual
-Wno-error=enum-compare -Wno-error=inline -Wno-error=maybe-uninitialized
-Wno-error=overflow -Wno-error=sequence-point -Wno-error=strict-overflow
-Wno-error=unused-but-set-variable -Wno-error=misleading-indentation
-Wno-error=nonnull-compare -Wno-error=shift-overflow
-Wno-error=tautological-compare -Werror -std=c99 -version -fPIC
-fno-omit-frame-pointer -ffreestanding -fwrapv -fstack-protector
-fformat-extensions -fdiagnostics-show-option -fno-common -fms-extensions
-finline-limit=15000 --param inline-unit-growth=100 --param
large-function-growth=1000 -o - |
 /usr/local/bin/powerpc64-freebsd-as -v -I . -I /usr/src/sys -I
/usr/src/sys/contrib/libfdt --traditional-format -a64 -mppc64 -many -many -o
stack_machdep.o
GNU assembler version 2.28 (powerpc64-freebsd) using BFD version (GNU Binutils)
2.28
GNU C99 (FreeBSD Ports Collection for powerpc64) version 6.3.0
(powerpc64-unknown-freebsd12.0)
        compiled by GNU C version 4.2.1 Compatible FreeBSD Clang 4.0.0
(tags/RELEASE_400/final 297347), GMP version 6.1.2, MPFR version 3.1.5-p2, MPC
version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
#include "..." search starts here:
#include <...> search starts here:
 .
 /usr/src/sys
 /usr/src/sys/contrib/libfdt

/usr/obj/powerpc64vtscdbg_xtoolchain-gcc_kernel/powerpc.powerpc64/usr/src/tmp/usr/include
End of search list.
GNU C99 (FreeBSD Ports Collection for powerpc64) version 6.3.0
(powerpc64-unknown-freebsd12.0)
        compiled by GNU C version 4.2.1 Compatible FreeBSD Clang 4.0.0
(tags/RELEASE_400/final 297347), GMP version 6.1.2, MPFR version 3.1.5-p2, MPC
version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8ac087b8ad16a23ac09c5d0c7497aeae
/usr/src/sys/powerpc/powerpc/stack_machdep.c: In function 'stack_save':
/usr/src/sys/powerpc/powerpc/stack_machdep.c:113:22: error: calling
'__builtin_frame_address' with a nonzero argument is unsafe
[-Werror=frame-address]
  frame = (register_t)__builtin_frame_address(1);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
*** Error code 1
. . .

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