AuxXxilium/linux_dsm_epyc7002
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4c35bf3ae9
linux_dsm_epyc7002/arch/ia64/kernel
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Al Viro 4c35bf3ae9 [ia64] sanitize elf_access_gpreg() 
The function takes the register number, finds the corresponding field
of pt_regs for registers that are saved there or does the unwind for the
registers that end up spilled on the kernel stack.  Then it reads from
or writes to the resulting location.

Unfortunately, finding the required pt_regs field is done by rather
horrible switch.  It's microoptimized in all the wrong places - it
even uses the knowledge that fields for r8..r11 follow each other
in pt_regs layout, while r12..r13 are not adjacent to those, etc.

All of that is to encode the mapping from register numbers to offsets +
the information that r4..r7 are not to be found in pt_regs.

It's deeply in nasal demon territory, at that - the games it plays
with pointer arithmetics on addresses of structure members are
undefined behaviour.

Valid C ends up with better code in this case: just initialize a constant
array with offsets of relevant pt_regs fields and we don't need that
switch anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-06-26 01:01:53 -04:00
..
syscalls vfs: add faccessat2 syscall 2020-05-14 16:44:25 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
acpi-ext.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi.c ACPI/sleep: Convert acpi_wakeup_address into a function 2019-12-10 10:15:48 +01:00
asm-offsets.c y2038: vdso: change timespec to __kernel_old_timespec 2019-11-15 14:38:28 +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
brl_emu.c signal: Remove the task parameter from force_sig_fault 2019-05-29 09:31:43 -05:00
crash_dump.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crash.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
cyclone.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
dma-mapping.c dma-direct: provide mmap and get_sgtable method overrides 2019-11-11 10:52:15 +01:00
efi_stub.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
elfcore.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
entry.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
entry.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
err_inject.c ia64/err-inject: fix spelling mistake: "capapbilities" -> "capabilities" 2018-03-05 14:44:53 -08:00
esi_stub.S treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
esi.c efi/ia64: Use existing helpers to locate ESI table 2020-02-23 21:59:42 +01:00
fsys.S docs: ia64: convert to ReST 2019-07-15 09:20:25 -03:00
fsyscall_gtod_data.h Stop ia64 being the last holdout using GENERIC_TIME_VSYSCALL_OLD 2017-11-13 12:15:40 -08:00
ftrace.c ia64: ftrace: Fix the comments for ftrace_modify_code() 2015-12-23 14:27:23 -05:00
gate-data.S Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
gate.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gate.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
ia64_ksyms.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
iosapic.c ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
irq_ia64.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
irq_lsapic.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irq.c ia64: remove now unused machvec indirections 2019-08-16 11:33:57 -07:00
irq.h ia64: replace setup_irq() by request_irq() 2020-03-13 15:21:28 -07:00
ivt.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
kprobes.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
machine_kexec.c ia64: remove now unused machvec indirections 2019-08-16 11:33:57 -07:00
Makefile ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
Makefile.gate ia64: require -Wl,--hash-style=sysv 2019-05-18 11:29:01 +09:00
mca_asm.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
mca_drv_asm.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mca_drv.c ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
mca_drv.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mca.c kernel: rename show_stack_loglvl() => show_stack() 2020-06-09 09:39:13 -07:00
minstate.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.c ia64:unwind: fix double free for mod->arch.init_unw_table 2019-08-06 10:19:35 -07:00
msi_ia64.c ia64: remove now unused machvec indirections 2019-08-16 11:33:57 -07:00
nr-irqs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
numa.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pal.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
palinfo.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
patch.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci-dma.c ia64 for v5.4 - big change here is removal of support for SGI Altix 2019-09-16 15:32:01 -07:00
perfmon_default_smpl.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
perfmon_generic.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perfmon_itanium.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perfmon_mckinley.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perfmon_montecito.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perfmon.c mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
process.c kernel: rename show_stack_loglvl() => show_stack() 2020-06-09 09:39:13 -07:00
ptrace.c [ia64] sanitize elf_access_gpreg() 2020-06-26 01:01:53 -04:00
relocate_kernel.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
sal.c ia64: remove now unused machvec indirections 2019-08-16 11:33:57 -07:00
salinfo.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
setup.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
sigframe.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
signal.c ia64: annotate a switch fallthrough in ia64_do_signal 2019-08-12 09:52:36 -07:00
smp.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
smpboot.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
stacktrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sys_ia64.c ia64: remove CONFIG_PCI ifdefs 2019-08-16 11:33:57 -07:00
time.c ia64: replace setup_irq() by request_irq() 2020-03-13 15:21:28 -07:00
topology.c ia64: remove CONFIG_ACPI ifdefs 2019-08-16 11:33:57 -07:00
traps.c signal: Remove the task parameter from force_sig_fault 2019-05-29 09:31:43 -05:00
unaligned.c ia64: annotate switch fallthroughs in ia64_handle_unaligned 2019-08-12 09:53:13 -07:00
uncached.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
unwind_decoder.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwind_i.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwind.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
vmlinux.lds.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00