Buildresult: powerpc-fixes/mpc85xx_defconfig+KVM/powerpc-gcc11 built on May 3 2022, 01:12

kisskb

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Status:	OK
Date/Time:	May 3 2022, 01:12
Duration:	0:01:39.900172
Builder:	ka7
Revision:	powerpc/vdso: Fix incorrect CFI in gettimeofday.S (`7e8cecfabd0072e81869ab9415fac7e2c2d97d57)`
Target:	powerpc-fixes/mpc85xx_defconfig+KVM/powerpc-gcc11
Branch:	powerpc-fixes
Compiler:	powerpc-gcc11 (powerpc64-linux-gcc (GCC) 11.1.0 / GNU ld (GNU Binutils) 2.36.1)
Config:	mpc85xx_defconfig+KVM (download)
Log:	Download original Possible warnings (7) .config:4340:warning: override: reassigning to symbol PPC_E500MC .config:4341:warning: override: reassigning to symbol VIRTUALIZATION include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] arch/powerpc/boot/dts/fsl/mpc8541cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0" arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/dts/fsl/mpc8555cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0" arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) Full Log # git rev-parse -q --verify 7e8cecfabd0072e81869ab9415fac7e2c2d97d57^{commit} 7e8cecfabd0072e81869ab9415fac7e2c2d97d57 already have revision, skipping fetch # git checkout -q -f -B kisskb 7e8cecfabd0072e81869ab9415fac7e2c2d97d57 # git clean -qxdf # < git log -1 # commit 7e8cecfabd0072e81869ab9415fac7e2c2d97d57 # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Mon May 2 18:14:01 2022 +1000 # # powerpc/vdso: Fix incorrect CFI in gettimeofday.S # # As reported by Alan, the CFI (Call Frame Information) in the VDSO time # routines is incorrect since commit ce7d8056e38b ("powerpc/vdso: Prepare # for switching VDSO to generic C implementation."). # # In particular the changes to the frame address register (r1) are not # properly described, which prevents gdb from being able to generate a # backtrace from inside VDSO functions, eg: # # Breakpoint 1, 0x00007ffff7f804dc in __kernel_clock_gettime () # (gdb) bt # #0 0x00007ffff7f804dc in __kernel_clock_gettime () # #1 0x00007ffff7d8872c in clock_gettime@@GLIBC_2.17 () from /lib64/libc.so.6 # #2 0x00007fffffffd960 in ?? () # #3 0x00007ffff7d8872c in clock_gettime@@GLIBC_2.17 () from /lib64/libc.so.6 # Backtrace stopped: frame did not save the PC # # Alan helpfully describes some rules for correctly maintaining the CFI information: # # 1) Every adjustment to the current frame address reg (ie. r1) must be # described, and exactly at the instruction where r1 changes. Why? # Because stack unwinding might want to access previous frames. # 2) If a function changes LR or any non-volatile register, the save # location for those regs must be given. The cfi can be at any # instruction after the saves up to the point that the reg is # changed. (Exception: LR save should be described before a bl.) # 3) If asychronous unwind info is needed then restores of LR and # non-volatile regs must also be described. The cfi can be at any # instruction after the reg is restored up to the point where the # save location is (potentially) trashed. # # Fix the inability to backtrace by adding CFI directives describing the # changes to r1, ie. satisfying rule 1. # # Also change the information for LR to point to the copy saved on the # stack, not the value in r0 that will be overwritten by the function # call. # # Finally, add CFI directives describing the save/restore of r2. # # With the fix gdb can correctly back trace and navigate up and down the stack: # # Breakpoint 1, 0x00007ffff7f804dc in __kernel_clock_gettime () # (gdb) bt # #0 0x00007ffff7f804dc in __kernel_clock_gettime () # #1 0x00007ffff7d8872c in clock_gettime@@GLIBC_2.17 () from /lib64/libc.so.6 # #2 0x0000000100015b60 in gettime () # #3 0x000000010000c8bc in print_long_format () # #4 0x000000010000d180 in print_current_files () # #5 0x00000001000054ac in main () # (gdb) up # #1 0x00007ffff7d8872c in clock_gettime@@GLIBC_2.17 () from /lib64/libc.so.6 # (gdb) # #2 0x0000000100015b60 in gettime () # (gdb) # #3 0x000000010000c8bc in print_long_format () # (gdb) # #4 0x000000010000d180 in print_current_files () # (gdb) # #5 0x00000001000054ac in main () # (gdb) # Initial frame selected; you cannot go up. # (gdb) down # #4 0x000000010000d180 in print_current_files () # (gdb) # #3 0x000000010000c8bc in print_long_format () # (gdb) # #2 0x0000000100015b60 in gettime () # (gdb) # #1 0x00007ffff7d8872c in clock_gettime@@GLIBC_2.17 () from /lib64/libc.so.6 # (gdb) # #0 0x00007ffff7f804dc in __kernel_clock_gettime () # (gdb) # # Fixes: ce7d8056e38b ("powerpc/vdso: Prepare for switching VDSO to generic C implementation.") # Cc: stable@vger.kernel.org # v5.11+ # Reported-by: Alan Modra <amodra@gmail.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 7e8cecfabd0072e81869ab9415fac7e2c2d97d57 # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # Added to kconfig CONFIG_PPC_E500MC=y # Added to kconfig CONFIG_VIRTUALIZATION=y # Added to kconfig CONFIG_KVM_E500MC=y # Added to kconfig # < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4340:warning: override: reassigning to symbol PPC_E500MC .config:4341:warning: override: reassigning to symbol VIRTUALIZATION # make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/build_bug.h:5, from /kisskb/src/include/linux/container_of.h:5, from /kisskb/src/include/linux/list.h:5, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 22 \| #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) \| ^ /kisskb/src/include/linux/compiler.h:78:45: note: in definition of macro 'unlikely' 78 \| # define unlikely(x) __builtin_expect(!!(x), 0) \| ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:13: note: in expansion of macro 'IS_ERR_VALUE' 139 \| if (IS_ERR_VALUE(fep->ring_mem_addr)) \| ^~~~~~~~~~~~ /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0" /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0" /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 # Build took: 0:01:39.900172

© Michael Ellerman 2006-2018.