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alistair23-linux/arch/powerpc/kernel
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Fangrui Song f04d1e880f bpf: Support llvm-objcopy for vmlinux BTF 
commit 90ceddcb49 upstream.

Simplify gen_btf logic to make it work with llvm-objcopy. The existing
'file format' and 'architecture' parsing logic is brittle and does not
work with llvm-objcopy/llvm-objdump.

'file format' output of llvm-objdump>=11 will match GNU objdump, but
'architecture' (bfdarch) may not.

.BTF in .tmp_vmlinux.btf is non-SHF_ALLOC. Add the SHF_ALLOC flag
because it is part of vmlinux image used for introspection. C code
can reference the section via linker script defined __start_BTF and
__stop_BTF. This fixes a small problem that previous .BTF had the
SHF_WRITE flag (objcopy -I binary -O elf* synthesized .data).

Additionally, `objcopy -I binary` synthesized symbols
_binary__btf_vmlinux_bin_start and _binary__btf_vmlinux_bin_stop (not
used elsewhere) are replaced with more commonplace __start_BTF and
__stop_BTF.

Add 2>/dev/null because GNU objcopy (but not llvm-objcopy) warns
"empty loadable segment detected at vaddr=0xffffffff81000000, is this intentional?"

We use a dd command to change the e_type field in the ELF header from
ET_EXEC to ET_REL so that lld will accept .btf.vmlinux.bin.o.  Accepting
ET_EXEC as an input file is an extremely rare GNU ld feature that lld
does not intend to support, because this is error-prone.

The output section description .BTF in include/asm-generic/vmlinux.lds.h
avoids potential subtle orphan section placement issues and suppresses
--orphan-handling=warn warnings.

Fixes: df786c9b94 ("bpf: Force .BTF section start to zero when dumping from vmlinux")
Fixes: cb0cc635c7 ("powerpc: Include .BTF section")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Fangrui Song <maskray@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Stanislav Fomichev <sdf@google.com>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Link: https://github.com/ClangBuiltLinux/linux/issues/871
Link: https://lore.kernel.org/bpf/20200318222746.173648-1-maskray@google.com
Signed-off-by: Maria Teguiani <teguiani@google.com>
Tested-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-06-17 16:40:20 +02:00
..
syscalls powerpc: Wire up clone3 syscall 2019-07-29 09:34:27 +10:00
trace powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 2019-09-18 12:24:55 +10:00
vdso32 powerpc: Fix vDSO clock_getres() 2019-12-17 19:56:47 +01:00
vdso64 powerpc: Fix vDSO clock_getres() 2019-12-17 19:56:47 +01:00
.gitignore powerpc: improve prom_init_check rule 2019-09-14 00:04:41 +10:00
Makefile powerpc: Make setjmp/longjmp signature standard 2020-04-17 10:50:23 +02:00
align.c powerpc/spe: Mark expected switch fall-throughs 2019-07-31 00:19:34 +10:00
asm-offsets.c powerpc: Fix vDSO clock_getres() 2019-12-17 19:56:47 +01:00
audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
btext.c powerpc: Rework btext_find_display to use of_stdout and device_type helpers 2018-11-26 22:33:37 +11:00
cacheinfo.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
cacheinfo.h powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild 2019-06-15 16:52:06 +10:00
compat_audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpu_setup_6xx.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cpu_setup_44x.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cpu_setup_fsl_booke.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cpu_setup_pa6t.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
cpu_setup_power.S powerpc/64s: Set reserved PCR bits 2019-09-21 08:36:53 +10:00
cpu_setup_ppc970.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cputable.c powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems 2020-03-12 13:00:31 +01:00
crash.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crash_dump.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
dawr.c powerpc: Fix compile issue with force DAWR 2019-07-03 15:19:35 +10:00
dbell.c KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag 2019-09-24 12:46:26 +10:00
dma-iommu.c powerpc updates for 5.4 2019-09-20 11:48:06 -07:00
dma-mask.c dma-mapping, powerpc: simplify the arch dma_set_mask override 2019-02-18 22:41:03 +11:00
dma-swiotlb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dt_cpu_ftrs.c powerpc/64: Setup a paca before parsing device tree etc. 2020-04-17 10:50:23 +02:00
early_32.c powerpc/32: use memset() instead of memset_io() to zero BSS 2019-05-03 01:20:26 +10:00
eeh.c powerpc/eeh: Fix eeh eeh_debugfs_break_device() with SRIOV devices 2019-09-27 09:04:17 +10:00
eeh_cache.c powerpc/eeh: Convert log messages to eeh_edev_* macros 2019-08-22 23:12:47 +10:00
eeh_dev.c powerpc/eeh: Add bdfn field to eeh_dev 2019-08-22 23:12:46 +10:00
eeh_driver.c powerpc/eeh: Fix deadlock handling dead PHB 2020-02-28 17:22:17 +01:00
eeh_event.c powerpc/eeh: Fix build with STACKTRACE=n 2019-09-14 00:01:14 +10:00
eeh_pe.c powerpc/eeh: Clean up EEH PEs after recovery finishes 2019-09-05 14:22:37 +10:00
eeh_sysfs.c powerpc/eeh: Add include_passed to eeh_pe_state_clear() 2019-02-05 11:55:43 +11:00
entry_32.S powerpc/mm: Fix CONFIG_PPC_KUAP_DEBUG on PPC32 2020-04-29 16:33:25 +02:00
entry_64.S powerpc/book3s64: Fix link stack flush on context switch 2019-11-29 10:10:31 +01:00
epapr_hcalls.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
epapr_paravirt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266 2019-06-05 17:30:28 +02:00
exceptions-64e.S powerpc/64: optimise LOAD_REG_IMMEDIATE_SYM() 2019-08-27 13:03:36 +10:00
exceptions-64s.S powerpc/64s/exception: reduce page fault unnecessary loads 2019-08-30 11:14:59 +10:00
fadump.c powerpc/fadump: support holes in kernel boot memory area 2019-09-14 00:04:46 +10:00
firmware.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fpu.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fsl_booke_entry_mapping.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head_8xx.S powerpc/8xx: Fix clearing of bits 20-23 in ITLB miss 2020-02-28 17:22:17 +01:00
head_32.S powerpc/32s: use CONFIG_PPC_BOOK3S_601 instead of reading PVR 2019-08-28 23:19:33 +10:00
head_32.h powerpc/32: replace LOAD_MSR_KERNEL() by LOAD_REG_IMMEDIATE() 2019-08-27 13:03:36 +10:00
head_40x.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
head_44x.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
head_64.S powerpc/prom: convert PROM_BUG() to standard trap 2019-08-28 11:31:18 +10:00
head_booke.h powerpc/32: fix build failure on book3e with KVM 2019-06-16 00:03:38 +10:00
head_fsl_booke.S powerpc/kasan: Fix boot failure with RELOCATABLE && FSL_BOOKE 2020-01-26 10:00:59 +01:00
hw_breakpoint.c powerpc/watchpoint: Disable watchpoint hit by larx/stcx instructions 2019-09-12 09:27:00 +10:00
idle.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_6xx.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_book3e.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_book3s.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_e500.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_power4.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ima_kexec.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
io-workarounds.c powerpc/mm: rework io-workaround invocation. 2019-08-27 13:03:34 +10:00
io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
iomap.c powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo} 2018-04-05 14:59:26 +10:00
iommu.c Merge branch 'topic/ppc-kvm' into next 2019-08-30 09:52:57 +10:00
irq.c powerpc/irq: fix stack overflow verification 2019-12-31 16:46:29 +01:00
isa-bridge.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
jump_label.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
kexec_elf_64.c kexec: add KEXEC_ELF 2019-09-06 23:58:43 +02:00
kgdb.c powerpc: Activate CONFIG_THREAD_INFO_IN_TASK 2019-02-23 22:31:40 +11:00
kprobes-ftrace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
kprobes.c powerpc/kprobes: Ignore traps that happened in real mode 2020-04-17 10:50:23 +02:00
kvm.c powerpc/kvm: Explicitly mark kvm guest code as __init 2019-09-14 00:04:40 +10:00
kvm_emul.S powerpc/kvm: Add ifdefs around template code 2019-09-14 00:04:40 +10:00
l2cr_6xx.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
legacy_serial.c powerpc: Use of_node_name_eq for node name comparisons 2018-12-22 21:29:50 +11:00
machine_kexec.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
machine_kexec_32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
machine_kexec_64.c powerpc/pseries/svm: Unshare all pages before kexecing a new kernel 2019-08-30 09:55:40 +10:00
machine_kexec_file_64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285 2019-06-05 17:36:37 +02:00
mce.c powerpc/64s/pseries: machine check convert to use common event code 2019-08-30 10:32:35 +10:00
mce_power.c powerpc/mm/mce: Keep irqs disabled during lockless page table walk 2019-09-19 21:24:59 +10:00
misc.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
misc_32.S powerpc: Convert flush_icache_range & friends to C 2020-03-12 13:00:25 +01:00
misc_64.S powerpc: Convert flush_icache_range & friends to C 2020-03-12 13:00:25 +01:00
module.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
module.lds powerpc/modules: Fix alignment of .toc section in kernel modules 2017-12-11 13:03:35 +11:00
module_32.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
module_64.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
msi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
note.S powerpc: Add PowerPC Capabilities ELF note 2019-08-30 09:40:15 +10:00
nvram_64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
of_platform.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
optprobes.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
optprobes_head.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
paca.c powerpc/64: Prevent stack protection in early boot 2020-04-17 10:50:23 +02:00
pci-common.c powerpc/64: Adjust order in pcibios_init() 2019-08-22 23:11:48 +10:00
pci-hotplug.c powerpc/eeh: Fix race when freeing PDNs 2019-09-05 14:22:37 +10:00
pci_32.c powerpc/64: Adjust order in pcibios_init() 2019-08-22 23:11:48 +10:00
pci_64.c powerpc/64: Adjust order in pcibios_init() 2019-08-22 23:11:48 +10:00
pci_dn.c powerpc/sriov: Remove VF eeh_dev state when disabling SR-IOV 2020-02-24 08:36:56 +01:00
pci_of_scan.c powerpc/of/pci: Rewrite pci_parse_of_flags 2019-08-29 20:24:05 +10:00
pmc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppc32.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppc_save_regs.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
proc_powerpc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
process.c powerpc updates for 5.4 2019-09-20 11:48:06 -07:00
prom.c powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel 2019-09-14 00:04:45 +10:00
prom_init.c powerpc/prom_init: Pass the "os-term" message to hypervisor 2020-04-23 10:36:34 +02:00
prom_init_check.sh powerpc/prom_init: Undo relocation before entering secure mode 2019-10-29 15:12:17 +11:00
prom_parse.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ptrace.c ptrace: move clearing of TIF_SYSCALL_EMU flag to core 2019-06-05 17:51:17 +01:00
ptrace32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
reloc_32.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
reloc_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rtas-proc.c powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
rtas-rtc.c powerpc: use time64_t in read_persistent_clock 2018-06-03 20:43:33 +10:00
rtas.c powerpc/rtas: allow rescheduling while changing cpu states 2019-08-20 21:22:27 +10:00
rtas_flash.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rtas_pci.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
rtasd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
security.c powerpc/security: Fix debugfs data leak on 32-bit 2020-01-26 10:00:59 +01:00
setup-common.c powerpc updates for 5.4 2019-09-20 11:48:06 -07:00
setup.h powerpc/64: Prevent stack protection in early boot 2020-04-17 10:50:23 +02:00
setup_32.c powerpc/32: drop CPU_FTR_UNIFIED_ID_CACHE 2019-08-28 23:19:33 +10:00
setup_64.c powerpc/setup_64: Set cache-line-size based on cache-block-size 2020-04-29 16:33:20 +02:00
signal.c powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery 2020-02-28 17:22:17 +01:00
signal.h powerpc/syscalls: signal_{32, 64} - switch to SYSCALL_DEFINE 2018-05-10 23:25:13 +10:00
signal_32.c powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery 2020-02-28 17:22:17 +01:00
signal_64.c powerpc/64/tm: Don't let userspace set regs->trap via sigreturn 2020-04-17 10:50:22 +02:00
smp-tbsync.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
stacktrace.c powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 2019-09-18 12:24:55 +10:00
suspend.c PM: hibernate: powerpc: Expose pfn_is_nosave() prototype 2019-06-14 10:48:56 +02:00
swsusp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swsusp_32.S powerpc/32s: fix suspend/resume when IBATs 4-7 are used 2019-06-19 20:05:07 +10:00
swsusp_64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 2019-06-19 17:11:22 +02:00
swsusp_asm64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 2019-06-19 17:11:22 +02:00
swsusp_booke.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sys_ppc32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
syscalls.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sysfs.c powerpc/pseries/svm: Export guest SVM status to user space via sysfs 2019-08-30 09:55:41 +10:00
systbl.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
systbl_chk.sh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
tau_6xx.c powerpc/tau: Make some function static 2018-05-25 12:04:44 +10:00
time.c Revert "powerpc/64: irq_work avoid interrupt when called with hardware irqs enabled" 2020-04-29 16:33:01 +02:00
tm.S powerpc/tm: update comment about interrupt re-entrancy 2019-07-02 21:39:49 +10:00
traps.c powerpc/book3s/mm: Update Oops message to print the correct translation in use 2020-01-04 19:18:10 +01:00
ucall.S powerpc/kernel: Add ucall_norets() ultravisor call handler 2019-08-30 09:40:15 +10:00
udbg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
udbg_16550.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
uprobes.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
vdso.c powerpc/32s: drop CPU_FTR_USE_RTC feature 2019-08-28 23:19:33 +10:00
vecemu.c powerpc: Add a missing include header 2018-05-25 12:04:46 +10:00
vector.S powerpc/64: Don't trace code that runs with the soft irq mask unreconciled 2019-05-03 01:58:11 +10:00
vmlinux.lds.S bpf: Support llvm-objcopy for vmlinux BTF 2020-06-17 16:40:20 +02:00
watchdog.c powerpc/watchdog: Use hrtimers for per-CPU heartbeat 2019-04-30 11:31:02 +10:00