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e268f84848
linux/arch/powerpc/kernel
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Ulrich Weigand e268f84848 powerpc/module: Handle R_PPC64_ENTRY relocations 
commit a61674bdfc upstream.

GCC 6 will include changes to generated code with -mcmodel=large,
which is used to build kernel modules on powerpc64le.  This was
necessary because the large model is supposed to allow arbitrary
sizes and locations of the code and data sections, but the ELFv2
global entry point prolog still made the unconditional assumption
that the TOC associated with any particular function can be found
within 2 GB of the function entry point:

func:
	addis r2,r12,(.TOC.-func)@ha
	addi  r2,r2,(.TOC.-func)@l
	.localentry func, .-func

To remove this assumption, GCC will now generate instead this global
entry point prolog sequence when using -mcmodel=large:

	.quad .TOC.-func
func:
	.reloc ., R_PPC64_ENTRY
	ld    r2, -8(r12)
	add   r2, r2, r12
	.localentry func, .-func

The new .reloc triggers an optimization in the linker that will
replace this new prolog with the original code (see above) if the
linker determines that the distance between .TOC. and func is in
range after all.

Since this new relocation is now present in module object files,
the kernel module loader is required to handle them too.  This
patch adds support for the new relocation and implements the
same optimization done by the GNU linker.

Signed-off-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-31 11:29:03 -08:00
..
vdso32 powerpc/vdso: Avoid link stack corruption in __get_datapage() 2015-10-01 16:52:02 +10:00
vdso64 powerpc/vdso: Avoid link stack corruption in __get_datapage() 2015-10-01 16:52:02 +10:00
.gitignore
align.c powerpc: Remove double braces in alignment code. 2014-11-10 09:59:32 +11:00
asm-offsets.c ARM: 2015-09-10 16:42:49 -07:00
audit.c
btext.c
cacheinfo.c powerpc: Fix missing L2 cache size in /sys/devices/system/cpu 2015-04-11 20:49:28 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S
cpu_setup_44x.S
cpu_setup_fsl_booke.S powerpc/booke: Restrict SPE exception handlers to e200/e500 cores 2014-09-22 10:11:31 +02:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/book3s: Fix flush_tlb cpu_spec hook to take a generic argument. 2015-03-17 07:52:48 +11:00
cpu_setup_ppc970.S
cputable.c powerpc/tm: Abort syscalls in active transactions 2015-06-19 17:10:28 +10:00
crash_dump.c powerpc: Remove superfluous bootmem includes 2014-11-10 09:59:26 +11:00
crash.c powerpc/book3e/kdump: Enable crash_kexec_wait_realmode 2015-10-27 18:13:27 -05:00
dbell.c powerpc/powernv: Fixes for hypervisor doorbell handling 2015-03-20 14:51:53 +11:00
dma-iommu.c powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask 2015-07-13 10:10:55 +10:00
dma-swiotlb.c powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask 2015-07-13 10:10:55 +10:00
dma.c powerpc/dma: dma_set_coherent_mask() should not be GPL only 2015-10-28 14:20:50 +09:00
eeh_cache.c powerpc/eeh: fix start/end/flags type in struct pci_io_addr_range{} 2015-05-13 14:00:07 +10:00
eeh_dev.c powerpc/eeh: Create eeh_dev from pci_dn instead of device_node 2015-03-24 13:15:51 +11:00
eeh_driver.c Revert "powerpc/eeh: Don't unfreeze PHB PE after reset" 2015-12-09 14:05:10 +11:00
eeh_event.c powerpc/powernv: Fix killed EEH event 2014-06-11 17:04:33 +10:00
eeh_pe.c powerpc/eeh: Disable automatically blocked PCI config 2015-08-18 19:34:42 +10:00
eeh_sysfs.c powerpc/eeh: Fix PE state format 2014-11-27 09:32:58 +11:00
eeh.c powerpc/eeh: More relaxed condition for enabled IO path 2015-10-21 20:41:43 +11:00
entry_32.S powerpc/kernel: Change the do_syscall_trace_enter() API 2015-07-29 11:56:11 +10:00
entry_64.S powerpc/kernel: Change the do_syscall_trace_enter() API 2015-07-29 11:56:11 +10:00
epapr_hcalls.S
epapr_paravirt.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-06-10 18:54:22 -07:00
exceptions-64e.S powerpc/book3e: support CONFIG_RELOCATABLE 2015-10-27 18:13:27 -05:00
exceptions-64s.S powerpc: Non relocatable system call doesn't need a trampoline 2015-06-02 13:26:47 +10:00
fadump.c powerpc/fadump: Fix endianess issues in firmware assisted dump handling 2014-10-30 16:52:46 +11:00
firmware.c
fpu.S powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
fsl_booke_entry_mapping.S powerpc/fsl: Force coherent memory on e500mc derivatives 2015-08-07 23:00:01 -05:00
ftrace.c powerpc updates for 3.19 2014-12-11 17:48:14 -08:00
head_8xx.S powerpc/8xx: Implementation of PAGE_EXEC 2015-06-02 21:37:28 -05:00
head_32.S
head_40x.S powerpc: Remove check for CONFIG_SERIAL_TEXT_DEBUG 2014-06-11 16:31:21 +10:00
head_44x.S powerpc/ppc476: Disable BTAC 2014-08-13 15:13:42 +10:00
head_64.S powerpc/book3e: support CONFIG_RELOCATABLE 2015-10-27 18:13:27 -05:00
head_booke.h
head_fsl_booke.S powerpc/booke: Revert SPE/AltiVec common defines for interrupt numbers 2014-09-22 10:11:31 +02:00
hw_breakpoint.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
ibmebus.c powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00
idle_6xx.S
idle_book3e.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_e500.S powerpc/e500mc: Remove dead L2 flushing code in idle_e500.S 2015-06-02 21:37:19 -05:00
idle_power4.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_power7.S powerpc/powernv: Fix race in updating core_idle_state 2015-07-07 10:16:52 +10:00
idle.c
io-workarounds.c powerpc/mm: Differentiate between hugetlb and THP during page walk 2015-10-12 15:30:09 +11:00
io.c
iomap.c powerpc/kerenl: Enable EEH for IO accessors 2014-06-24 12:43:13 +10:00
iommu.c powerpc/iommu/powernv: Release replaced TCE 2015-06-11 15:16:49 +10:00
irq.c powerpc, irq: Use access helper irq_data_get_affinity_mask() 2015-09-15 17:06:28 +02:00
isa-bridge.c
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
kprobes.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
kvm_emul.S
kvm.c powerpc: Remove redundant breaks 2015-08-06 15:10:20 +10:00
l2cr_6xx.S
legacy_serial.c powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc/book3e-64: Enable kexec 2015-10-27 18:13:30 -05:00
machine_kexec.c powerpc: Fix endian issues in kexec and crash dump code 2014-02-11 11:24:52 +11:00
Makefile powerpc/ftrace: add powerpc timebase as a trace clock source 2015-08-06 16:36:23 +10:00
mce_power.c powerpc/book3s: Fix flush_tlb cpu_spec hook to take a generic argument. 2015-03-17 07:52:48 +11:00
mce.c powerpc/mce: fix off by one errors in mce event handling 2015-05-12 19:44:01 +10:00
misc_32.S atomic: Collapse all atomic_{set,clear}_mask definitions 2015-07-27 14:06:24 +02:00
misc_64.S powerpc/book3e-64: Enable kexec 2015-10-27 18:13:30 -05:00
misc.S powerpc: Rename __get_SP() to current_stack_pointer() 2014-10-15 11:23:20 +11:00
module_32.c powerpc: Use pr_fmt in module loader code 2014-10-02 17:33:54 +10:00
module_64.c powerpc/module: Handle R_PPC64_ENTRY relocations 2016-01-31 11:29:03 -08:00
module.c
msi.c powerpc: Remove MSI-related PCI controller ops from ppc_md 2015-06-02 11:47:45 +10:00
nvram_64.c powerpc/nvram: Fix function name in some errors messages. 2015-10-02 22:55:05 +10:00
of_platform.c powerpc/eeh: Do probe on pci_dn 2015-03-24 13:15:52 +11:00
paca.c powerpc/book3e-64: Don't limit paca to 256 MiB 2015-10-27 18:13:28 -05:00
pci_32.c powerpc: Remove more traces of bootmem 2014-11-19 21:41:51 +11:00
pci_64.c powerpc updates for 3.19 2014-12-11 17:48:14 -08:00
pci_dn.c powerpc/powernv: Shift VF resource with an offset 2015-03-31 13:02:38 +11:00
pci_of_scan.c libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
pci-common.c powerpc/pci: export pcibios_free_controller() 2015-10-15 20:31:57 +11:00
pci-hotplug.c powerpc/pci: Add release_device() hook to phb ops 2015-06-03 13:27:15 +10:00
pmc.c
ppc_ksyms_32.c powerpc: Separate ppc32 symbol exports into ppc_ksyms_32.c 2014-09-25 23:14:40 +10:00
ppc_ksyms.c powerpc: Rename __get_SP() to current_stack_pointer() 2014-10-15 11:23:20 +11:00
ppc_save_regs.S
ppc32.h
proc_powerpc.c
process.c powerpc/tm: Check for already reclaimed tasks 2016-01-31 11:29:03 -08:00
prom_init_check.sh powerpc: Simplify symbol check in prom_init_check.sh 2014-09-25 23:14:46 +10:00
prom_init.c vTPM: get the buffer allocated for event log instead of the actual log 2015-10-19 01:01:23 +02:00
prom_parse.c
prom.c powerpc/prom: Use of_get_next_parent() in of_get_ibm_chip_id() 2015-10-28 12:08:32 +09:00
ptrace.c powerpc/kernel: Enable seccomp filter 2015-07-30 14:34:44 +10:00
ptrace32.c
reloc_32.S
reloc_64.S powerpc: Align p_dyn, p_rela and p_st symbols 2014-03-07 13:50:19 +11:00
rtas_flash.c powerpc: Fix endianness of flash_block_list in rtas_flash 2014-07-28 11:30:54 +10:00
rtas_pci.c powerpc: move find_and_init_phbs() to pSeries specific code 2015-04-11 20:49:09 +10:00
rtas-proc.c powerpc: LLVM complains about forward declaration of struct rtas_sensors 2014-11-10 09:59:32 +11:00
rtas-rtc.c
rtas.c powerpc/rtas: Validate rtas.entry before calling enter_rtas() 2015-10-22 11:03:25 +11:00
rtasd.c powerpc: Make a bunch of things static 2014-09-25 23:14:41 +10:00
setup_32.c powerpc32: memset: only use dcbz once cache is enabled 2015-09-17 10:36:53 +10:00
setup_64.c powerpc/book3e-64/kexec: Enable SMP release 2015-10-27 18:13:29 -05:00
setup-common.c powerpc: Convert power off logic to pm_power_off 2014-11-03 12:12:51 +11:00
signal_32.c powerpc/tm: Block signal return setting invalid MSR state 2015-11-23 20:06:31 +11:00
signal_64.c powerpc/tm: Block signal return setting invalid MSR state 2015-11-23 20:06:31 +11:00
signal.c powerpc: Use sigsp() 2014-08-06 13:04:32 +02:00
signal.h powerpc: Use get_signal() signal_setup_done() 2014-08-06 13:03:09 +02:00
smp-tbsync.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
smp.c powerpc/smp: Wait until secondaries are active & online 2015-03-04 13:19:33 +11:00
stacktrace.c powerpc: Rename __get_SP() to current_stack_pointer() 2014-10-15 11:23:20 +11:00
suspend.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
swsusp_32.S
swsusp_64.c
swsusp_asm64.S powerpc: Only save/restore SDR1 if in hypervisor mode 2013-10-31 12:37:29 +11:00
swsusp_booke.S powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg 2014-01-07 19:06:03 -06:00
swsusp.c
sys_ppc32.c
syscalls.c powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
sysfs.c powerpc/dscr: Add some in-code documentation 2015-06-07 19:29:15 +10:00
systbl_chk.c powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
systbl_chk.sh
systbl.S powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
tau_6xx.c
time.c powerpc/time: Migrate to new 'set-state' interface 2015-08-10 11:41:02 +02:00
tm.S powerpc/kernel: Rename PACA_DSCR to PACA_DSCR_DEFAULT 2015-06-07 19:29:00 +10:00
trace_clock.c powerpc/ftrace: add powerpc timebase as a trace clock source 2015-08-06 16:36:23 +10:00
traps.c powerpc: Set the correct kernel taint on machine check errors. 2015-07-06 20:24:35 +10:00
udbg_16550.c powerpc: Fix bad NULL pointer check in udbg_uart_getc_poll() 2014-11-12 13:47:20 +11:00
udbg.c powerpc: Remove the celleb support 2015-04-07 17:15:13 +10:00
uprobes.c uprobes/powerpc: Kill arch_uprobe->ainsn 2013-11-20 16:31:01 +01:00
vdso.c powerpc/vdso: Disable building the 32-bit VDSO on little endian 2015-05-11 20:01:02 +10:00
vecemu.c
vector.S powerpc: Change vrX register defines to vX to match gcc and glibc 2015-03-16 18:32:11 +11:00
vio.c powerpc: use for_each_sg() 2015-06-24 17:49:38 -07:00
vmlinux.lds.S powerpc: discard .exit.data at runtime 2015-10-15 20:31:59 +11:00