Christophe Leroy af36ccb8f8 powerpc/vdso: Flag VDSO64 entry points as functions ... [ Upstream commit 0161bd38c2 ] On powerpc64 as shown below by readelf, vDSO functions symbols have type NOTYPE. $ powerpc64-linux-gnu-readelf -a arch/powerpc/kernel/vdso/vdso64.so.dbg ELF Header: Magic: 7f 45 4c 46 02 02 01 00 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, big endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: DYN (Shared object file) Machine: PowerPC64 Version: 0x1 ... Symbol table '.dynsym' contains 12 entries: Num: Value Size Type Bind Vis Ndx Name ... 1: 0000000000000524 84 NOTYPE GLOBAL DEFAULT 8 __[...]@@LINUX_2.6.15 ... 4: 0000000000000000 0 OBJECT GLOBAL DEFAULT ABS LINUX_2.6.15 5: 00000000000006c0 48 NOTYPE GLOBAL DEFAULT 8 __[...]@@LINUX_2.6.15 Symbol table '.symtab' contains 56 entries: Num: Value Size Type Bind Vis Ndx Name ... 45: 0000000000000000 0 OBJECT GLOBAL DEFAULT ABS LINUX_2.6.15 46: 00000000000006c0 48 NOTYPE GLOBAL DEFAULT 8 __kernel_getcpu 47: 0000000000000524 84 NOTYPE GLOBAL DEFAULT 8 __kernel_clock_getres To overcome that, commit ba83b3239e ("selftests: vDSO: fix vDSO symbols lookup for powerpc64") was applied to have selftests also look for NOTYPE symbols, but the correct fix should be to flag VDSO entry points as functions. The original commit that brought VDSO support into powerpc/64 has the following explanation: Note that the symbols exposed by the vDSO aren't "normal" function symbols, apps can't be expected to link against them directly, the vDSO's are both seen as if they were linked at 0 and the symbols just contain offsets to the various functions. This is done on purpose to avoid a relocation step (ppc64 functions normally have descriptors with abs addresses in them). When glibc uses those functions, it's expected to use it's own trampolines that know how to reach them. The descriptors it's talking about are the OPD function descriptors used on ABI v1 (big endian). But it would be more correct for a text symbol to have type function, even if there's no function descriptor for it. glibc has a special case already for handling the VDSO symbols which creates a fake opd pointing at the kernel symbol. So changing the VDSO symbol type to function shouldn't affect that. For ABI v2, there is no function descriptors and VDSO functions can safely have function type. So lets flag VDSO entry points as functions and revert the selftest change. Link: 5f2dd691b6 Fixes: ba83b3239e ("selftests: vDSO: fix vDSO symbols lookup for powerpc64") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-By: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://patch.msgid.link/b6ad2f1ee9887af3ca5ecade2a56f4acda517a85.1728512263.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-12-14 19:51:00 +01:00
..
book3s	powerpc/32s: Do kuep_lock() and kuep_unlock() in assembly	2023-10-25 11:58:59 +02:00
nohash	powerpc/40x: Remove stale PTE_ATOMIC_UPDATES macro	2023-11-20 11:08:26 +01:00
vdso	powerpc: Redefine HMT_xxx macros as empty on PPC32	2021-08-27 00:56:52 +10:00
8xx_immap.h
accounting.h
agp.h
archrandom.h	powerpc/powernv/kvm: Use darn for H_RANDOM on Power9	2022-08-17 14:24:25 +02:00
asm-compat.h	powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros	2021-08-25 13:35:49 +10:00
asm-const.h	powerpc: remove GCC version check for UPD_CONSTR	2021-09-13 10:18:28 -07:00
asm-offsets.h
asm-prototypes.h	powerpc/64: use interrupt restart table to speed up return from interrupt	2021-06-25 00:06:56 +10:00
async_tx.h
atomic.h	powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros	2021-08-25 13:35:49 +10:00
backlight.h
barrier.h	powerpc/barrier: Avoid collision with clang's __lwsync macro	2021-06-10 21:44:57 +10:00
bitops.h	powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros	2021-08-25 13:35:49 +10:00
bootx.h
bpf_perf_event.h	powerpc/bpf: Fix use of user_pt_regs in uapi	2022-07-07 17:53:24 +02:00
btext.h
bug.h	powerpc/bug: Cast to unsigned long before passing to inline asm	2021-09-01 21:25:43 +10:00
cache.h
cacheflush.h
cell-pmu.h
cell-regs.h
checksum.h	powerpc: Force inlining of csum_add()	2021-06-16 00:16:47 +10:00
clocksource.h
cmpxchg.h	locking/atomic: powerpc: move to ARCH_ATOMIC	2021-05-26 13:20:52 +02:00
code-patching-asm.h
code-patching.h	powerpc/lib: Add helper to check if offset is within conditional branch range	2021-10-07 18:52:33 +11:00
compat.h	arch: remove compat_alloc_user_space	2021-09-08 15:32:35 -07:00
context_tracking.h
copro.h
cpm.h
cpm1.h
cpm2.h
cpu_has_feature.h
cpu_setup_power.h
cpufeature.h
cpuidle.h
cputable.h
cputhreads.h	KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors	2021-06-21 09:22:34 +10:00
cputime.h
crashdump-ppc64.h
current.h
dbdma.h
dbell.h
dcr-generic.h
dcr-mmio.h
dcr-native.h
dcr-regs.h
dcr.h
debug.h
delay.h
device.h
disassemble.h
dma-direct.h
dma.h
drmem.h	pseries/drmem: update LMBs after LPM	2021-08-10 23:14:55 +10:00
dt_cpu_ftrs.h
dtl.h
edac.h
eeh_event.h
eeh.h
ehv_pic.h
elf.h
elfnote.h
emergency-restart.h
emulated_ops.h
epapr_hcalls.h
exception-64e.h
exception-64s.h	KVM: PPC: Book3S 64: Move hcall early register setup to KVM	2021-06-10 22:12:12 +10:00
exec.h
extable.h	powerpc/bug: Provide better flexibility to WARN_ON/__WARN_FLAGS() with asm goto	2021-08-15 13:49:24 +10:00
fadump-internal.h	cma: factor out minimum alignment requirement	2024-07-05 09:14:13 +02:00
fadump.h
fb.h
feature-fixups.h
firmware.h	powerpc/pseries: Add support for FORM2 associativity	2021-08-13 22:04:27 +10:00
fixmap.h	powerpc/fixmap: Fix VM debug warning on unmap	2022-02-16 12:56:12 +01:00
floppy.h
fs_pd.h
fsl_85xx_cache_sram.h
fsl_gtm.h
fsl_hcalls.h
fsl_lbc.h
fsl_pamu_stash.h
fsl_pm.h
ftrace.h	powerpc/ftrace: Remove ftrace init tramp once kernel init is complete	2022-07-02 16:41:14 +02:00
futex.h
grackle.h
hardirq.h
head-64.h	powerpc/64: move interrupt return asm to interrupt_64.S	2021-06-25 00:06:55 +10:00
heathrow.h
highmem.h
hmi.h
hugetlb.h
hvcall.h	powerpc/pseries: Enforce hcall result buffer validity and size	2024-07-05 09:14:27 +02:00
hvconsole.h
hvcserver.h
hvsi.h
hw_breakpoint.h
hw_irq.h	powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC	2022-01-27 11:04:07 +01:00
hydra.h
i8259.h
ibmebus.h
icswx.h
ide.h
idle.h
imc-pmu.h	powerpc/imc-pmu: Fix use of mutex in IRQs disabled section	2023-01-18 11:48:52 +01:00
immap_cpm2.h
inst.h	powerpc/inst: Refactor PPC32 and PPC64 versions	2021-06-17 00:09:06 +10:00
interrupt.h	powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.	2024-08-19 05:45:51 +02:00
io_event_irq.h
io-defs.h
io-workarounds.h
io.h	powerpc/64: Set _IO_BASE to POISON_POINTER_DELTA not 0 for CONFIG_PCI=n	2024-07-18 13:07:29 +02:00
iommu.h	powerpc/kernel/iommu: Add new iommu_table_in_use() helper	2021-08-27 00:56:54 +10:00
ipic.h
irq_work.h	arch: consolidate arch_irq_work_raise prototypes	2024-02-23 08:54:39 +01:00
irq.h	powerpc/interrupt: Fix OOPS by not calling do_IRQ() from timer_interrupt()	2021-08-12 22:21:57 +10:00
irqflags.h
isa-bridge.h
jump_label.h	powerpc: Fix initrd corruption with relative jump labels	2021-06-15 23:35:57 +10:00
kasan.h
Kbuild
kdebug.h
kdump.h
kexec_ranges.h
kexec.h
keylargo.h
kfence.h
kgdb.h
kprobes.h
kup.h	powerpc/32s: Do kuep_lock() and kuep_unlock() in assembly	2023-10-25 11:58:59 +02:00
kvm_asm.h	KVM: PPC: Book3S HV P9: implement hash host / hash guest support	2021-06-10 22:12:15 +10:00
kvm_book3s_32.h
kvm_book3s_64.h	KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs	2022-02-01 17:27:03 +01:00
kvm_book3s_asm.h
kvm_book3s_uvmem.h
kvm_book3s.h	KVM: PPC: Book3S HV: Nested support in H_RPT_INVALIDATE	2021-06-22 23:35:37 +10:00
kvm_booke_hv_asm.h
kvm_booke.h
kvm_fpu.h
kvm_guest.h	powerpc: Fix is_kvm_guest() / kvm_para_available()	2021-06-25 14:47:19 +10:00
kvm_host.h	KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs	2022-02-01 17:27:03 +01:00
kvm_para.h
kvm_ppc.h	KVM: PPC: Book3S HV: XIVE: Change interface of passthrough interrupt routines	2021-08-10 23:14:59 +10:00
libata-portmap.h
linkage.h
livepatch.h	powerpc/64s: avoid reloading (H)SRR registers if they are still valid	2021-06-25 00:06:55 +10:00
local.h
lppaca.h	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-19 12:22:42 +02:00
lv1call.h
machdep.h
macio.h
mc146818rtc.h
mce.h
mediabay.h
mem_encrypt.h
membarrier.h	powerpc/non-smp: Unconditionaly call smp_mb() on switch_mm	2021-08-10 23:14:55 +10:00
mman.h
mmiowb.h
mmu_context.h	Merge branch 'topic/ppc-kvm' into next	2021-06-23 00:19:08 +10:00
mmu.h	powerpc/mm: Fix build failures due to arch_reserved_kernel_pages()	2024-02-23 08:54:36 +01:00
mmzone.h	powerpc/64s: Fix CONFIG_NUMA=n build due to create_section_mapping()	2024-02-23 08:54:36 +01:00
module.h
module.lds.h
mpc5xxx.h
mpc6xx.h
mpc52xx_psc.h
mpc52xx.h
mpc85xx.h
mpc5121.h
mpc8260.h
mpic_msgr.h
mpic_timer.h
mpic.h
msi_bitmap.h
nmi.h
nvram.h
ohare.h
opal-api.h
opal.h	powerpc/powernv: remove the nvlink support	2021-05-02 23:35:32 +10:00
paca.h	powerpc: Don't include lppaca.h in paca.h	2023-09-19 12:22:42 +02:00
page_32.h
page_64.h
page.h	powerpc/64: Only WARN if __pa()/__va() called with bad addresses	2022-06-09 10:23:12 +02:00
paravirt.h	powerpc: Don't include lppaca.h in paca.h	2023-09-19 12:22:42 +02:00
parport.h
pasemi_dma.h
pci-bridge.h	powerpc/pseries/pci: Add MSI domains	2021-08-10 23:14:57 +10:00
pci.h	powerpc/powernv: remove the nvlink support	2021-05-02 23:35:32 +10:00
percpu.h	powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.	2024-08-19 05:45:51 +02:00
perf_event_fsl_emb.h
perf_event_server.h
perf_event.h
pgalloc.h	mm/thp: define default pmd_pgtable()	2021-07-01 11:06:03 -07:00
pgtable-be-types.h
pgtable-types.h
pgtable.h	powerpc updates for 5.14	2021-07-02 12:54:34 -07:00
pkeys.h
plpar_wrappers.h	powerpc: Don't include lppaca.h in paca.h	2023-09-19 12:22:42 +02:00
pmac_feature.h
pmac_low_i2c.h
pmac_pfunc.h
pmc.h	KVM: PPC: Book3S HV Nested: Reflect guest PMU in-use to L0 when guest SPRs are live	2021-08-25 16:37:18 +10:00
pmi.h
pnv-ocxl.h
pnv-pci.h	powerpc/powernv/pci: Rework pnv_opal_pci_msi_eoi()	2021-08-10 23:15:01 +10:00
powernv.h
ppc_asm.h	powerpc: flexible GPR range save/restore macros	2022-07-12 16:35:02 +02:00
ppc-opcode.h	powerpc/mm: Switch obsolete dssall to .long	2022-06-14 18:36:27 +02:00
ppc-pci.h
ppc4xx.h
probes.h	powerpc/64s: avoid reloading (H)SRR registers if they are still valid	2021-06-25 00:06:55 +10:00
processor.h	powerpc/64: drop redundant defination of spin_until_cond	2021-06-17 00:09:11 +10:00
prom.h	powerpc/pseries: Add support for FORM2 associativity	2021-08-13 22:04:27 +10:00
ps3.h	powerpc/ps3: Add dma_mask to ps3_dma_region	2021-06-10 21:44:58 +10:00
ps3av.h
ps3gpu.h
ps3stor.h
pte-walk.h	powerpc: Fix reverse map real-mode address lookup with huge vmalloc	2021-05-28 22:54:27 +10:00
ptrace.h	Merge branch 'fixes' into next	2021-09-03 22:54:12 +10:00
qspinlock_paravirt.h
qspinlock.h	locking/atomic: powerpc: move to ARCH_ATOMIC	2021-05-26 13:20:52 +02:00
reg_8xx.h
reg_a2.h
reg_booke.h
reg_fsl_emb.h	powerpc/fsl: Fix mfpmr build errors with newer binutils	2024-04-10 16:18:37 +02:00
reg.h	KVM: PPC: Book3S HV Nested: Fix TM softpatch HFAC interrupt emulation	2021-08-25 16:37:17 +10:00
rheap.h
rio.h
rtas-types.h
rtas.h	Revert "powerpc/rtas: Implement reentrant rtas call"	2022-10-15 07:59:02 +02:00
runlatch.h
seccomp.h
sections.h	powerpc/toc: Future proof kernel toc	2024-01-25 14:52:32 -08:00
secure_boot.h
security_features.h	powerpc/security: Add a helper to query stf_barrier type	2021-10-07 19:52:58 +11:00
secvar.h
serial.h
set_memory.h	powerpc: Add set_memory_{p/np}() and remove set_memory_attr()	2022-04-08 14:24:04 +02:00
setjmp.h
setup.h	powerpc: Remove klimit	2021-06-25 00:07:10 +10:00
sfp-machine.h
shmparam.h
signal.h
simple_spinlock_types.h
simple_spinlock.h	powerpc: Fix eh field when calling lwarx on PPC32	2022-08-17 14:24:29 +02:00
slice.h
smp.h	powerpc/smp: Use existing L2 cache_map cpumask to find L3 cache siblings	2021-08-04 10:53:39 +10:00
smu.h
sparsemem.h
spinlock_types.h
spinlock.h
spu_csa.h
spu_info.h
spu_priv1.h
spu.h
sstep.h	powerpc/kprobes: Roll IS_RFI() macro into IS_RFID()	2021-06-25 14:47:18 +10:00
stackprotector.h
stacktrace.h
string.h
svm.h
swab.h
swiotlb.h
switch_to.h
synch.h
syscall.h	powerpc/audit: Fix syscall_get_arch()	2022-02-01 17:27:01 +01:00
syscalls.h	powerpc: Fix fallocate and fadvise64_64 compat parameter combination	2022-10-26 12:35:22 +02:00
task_size_32.h
task_size_64.h
tce.h	powerpc/pseries/iommu: Replace hard-coded page shift	2021-08-27 00:56:54 +10:00
termios.h
thread_info.h	powerpc/kasan: Force thread size increase with KASAN	2022-06-14 18:36:16 +02:00
time.h	KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races	2021-06-10 22:12:13 +10:00
timex.h	powerpc: define get_cycles macro for arch-override	2022-05-30 09:29:13 +02:00
tlb.h	mm/mremap: allow arch runtime override	2021-07-08 11:48:23 -07:00
tlbflush.h
tm.h
topology.h	powerpc/numa: Update cpu_cpu_map on CPU online/offline	2021-08-27 00:56:54 +10:00
trace_clock.h
trace.h
tsi108_irq.h
tsi108_pci.h
tsi108.h
types.h
uaccess.h	powerpc/uaccess: Fix build errors seen with GCC 13/14	2024-07-05 09:14:15 +02:00
udbg.h
uic.h
ultravisor-api.h
ultravisor.h
uninorth.h
unistd.h	powerpc/syscalls: Remove __NR__exit	2021-08-23 19:28:20 +10:00
uprobes.h	powerpc: Don't use 'struct ppc_inst' to reference instruction location	2021-06-17 00:09:00 +10:00
user.h
vas.h	powerpc/powernv/vas: Assign real address to rx_fifo in vas_rx_win_attr	2022-06-09 10:22:43 +02:00
vdso_datapage.h
vdso.h	powerpc/vdso: Flag VDSO64 entry points as functions	2024-12-14 19:51:00 +01:00
vermagic.h
vga.h
vio.h
vmalloc.h	powerpc: Force inlining of arch_vmap_p{u/m}d_supported()	2024-03-26 18:21:28 -04:00
word-at-a-time.h	word-at-a-time: use the same return type for has_zero regardless of endianness	2023-08-11 15:13:49 +02:00
xics.h	powerpc/xics: Rename the map handler in a check handler	2021-08-10 23:14:59 +10:00
xive-regs.h	KVM: PPC: Book3S HV: XIVE: Add support for automatic save-restore	2021-08-10 23:15:02 +10:00
xive.h	KVM: PPC: Book3S HV: XIVE: Add support for automatic save-restore	2021-08-10 23:15:02 +10:00
xmon.h
xor_altivec.h
xor.h