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Eric W. Biederman 936041b69a alpha/elf: Fix misc/setarch test of util-linux by removing 32bit support 
[ Upstream commit b029628be2 ]

Richard Henderson <richard.henderson@linaro.org> writes[1]:

> There was a Spec benchmark (I forget which) which was memory bound and ran
> twice as fast with 32-bit pointers.
>
> I copied the idea from DEC to the ELF abi, but never did all the other work
> to allow the toolchain to take advantage.
>
> Amusingly, a later Spec changed the benchmark data sets to not fit into a
> 32-bit address space, specifically because of this.
>
> I expect one could delete the ELF bit and personality and no one would
> notice. Not even the 10 remaining Alpha users.

In [2] it was pointed out that parts of setarch weren't working
properly on alpha because it has it's own SET_PERSONALITY
implementation.  In the discussion that followed Richard Henderson
pointed out that the 32bit pointer support for alpha was never
completed.

Fix this by removing alpha's 32bit pointer support.

As a bit of paranoia refuse to execute any alpha binaries that have
the EF_ALPHA_32BIT flag set.  Just in case someone somewhere has
binaries that try to use alpha's 32bit pointer support.

Link: https://lkml.kernel.org/r/CAFXwXrkgu=4Qn-v1PjnOR4SG0oUb9LSa0g6QXpBq4ttm52pJOQ@mail.gmail.com [1]
Link: https://lkml.kernel.org/r/20250103140148.370368-1-glaubitz@physik.fu-berlin.de [2]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/87y0zfs26i.fsf_-_@email.froward.int.ebiederm.org
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-03-28 21:58:51 +01:00
..
syscalls alpha: remove the needless aliases osf_{readv,writev} 2022-10-11 10:27:39 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
asm-offsets.c alpha: replace hardcoded stack offsets with autogenerated ones 2025-02-21 13:50:10 +01:00
audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
bugs.c alpha: Implement CPU vulnerabilities sysfs functions. 2018-04-07 15:04:04 -07:00
console.c vgacon: Set VGA struct resource types 2017-12-18 23:07:43 -06:00
core_apecs.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_cia.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
core_irongate.c memblock: use memblock_free for freeing virtual pointers 2021-11-06 13:30:41 -07:00
core_lca.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_marvel.c alpha: fix marvel_ioread8 build regression 2022-10-10 10:33:55 +02:00
core_mcpcia.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_polaris.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
core_t2.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_titan.c mm: remove unneeded includes of <asm/pgalloc.h> 2020-08-07 11:33:26 -07:00
core_tsunami.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_wildfire.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
entry.S alpha: replace hardcoded stack offsets with autogenerated ones 2025-02-21 13:50:10 +01:00
err_common.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_ev6.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_ev7.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_impl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_marvel.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_titan.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
es1888.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gct.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io.c alpha: add full ioread64/iowrite64 implementation 2022-10-04 11:23:29 +02:00
irq.c genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
irq_alpha.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_i8259.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_impl.h alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_pyxis.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_srm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
machvec_impl.h alpha: add full ioread64/iowrite64 implementation 2022-10-04 11:23:29 +02:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
module.c alpha: fix R_ALPHA_LITERAL reloc for large modules 2023-03-17 08:50:31 +01:00
osf_sys.c alpha/elf: Fix misc/setarch test of util-linux by removing 32bit support 2025-03-28 21:58:51 +01:00
pc873xx.c alpha: eliminate old-style function definitions 2021-05-06 19:24:11 -07:00
pc873xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci-noop.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
pci-sysfs.c alpha: pci-sysfs: fix all kernel-doc warnings 2021-09-08 11:50:25 -07:00
pci.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
pci_impl.h alpha: fix reboot on Avanti platform 2018-01-20 17:01:10 -08:00
pci_iommu.c alpha: Remove usage of the deprecated "pci-dma-compat.h" API 2022-02-25 17:19:20 +01:00
perf_event.c alpha: fix spelling mistakes 2021-07-25 22:33:04 -07:00
process.c kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
proto.h alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
ptrace.c ptrace: Create ptrace_report_syscall_{entry,exit} in ptrace.h 2022-03-10 13:35:08 -06:00
rtc.c rtc: Add support for configuring the UIP timeout for RTC reads 2024-01-31 16:17:01 -08:00
setup.c alpha: remove __init annotation from exported page_is_ram() 2023-08-16 18:27:31 +02:00
signal.c resume_user_mode: Move to resume_user_mode.h 2022-03-10 16:51:50 -06:00
smc37c93x.c arch: mostly remove <asm/segment.h> 2019-04-23 21:51:40 +02:00
smc37c669.c arch: mostly remove <asm/segment.h> 2019-04-23 21:51:40 +02:00
smp.c profile: setup_profiling_timer() is moslty not implemented 2022-07-29 18:12:36 -07:00
srm_env.c proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
srmcons.c tty: the rest, stop using tty_schedule_flip() 2021-11-25 18:35:23 +01:00
sys_alcor.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_cabriolet.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_dp264.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_eb64p.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_eiger.c alpha: remove unneeded semicolon in sys_eiger.c 2020-06-12 17:43:17 -07:00
sys_jensen.c alpha: mark 'Jensen' platform as no longer broken 2021-09-18 14:12:39 -07:00
sys_marvel.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
sys_miata.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_mikasa.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_nautilus.c alpha: fix spelling mistakes 2021-07-25 22:33:04 -07:00
sys_noritake.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_rawhide.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_ruffian.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_rx164.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sable.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sio.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sx164.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_takara.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_titan.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_wildfire.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
systbls.S alpha: syscalls: switch to generic syscalltbl.sh 2021-04-25 05:25:22 +09:00
termios.c termios: start unifying non-UAPI parts of asm/termios.h 2022-09-09 10:44:34 +02:00
time.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
traps.c alpha: align stack for page fault and user unaligned trap handlers 2025-02-21 13:50:05 +01:00
vmlinux.lds.S vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG 2020-09-01 09:50:35 +02:00