Benjamin Berg 5a6951273e um: always use the internal copy of the FP registers ...

When switching from userspace to the kernel, all registers including the
FP registers are copied into the kernel and restored later on. As such,
the true source for the FP register state is actually already in the
kernel and they should never be grabbed from the userspace process.

Change the various places to simply copy the data from the internal FP
register storage area. Note that on i386 the format of PTRACE_GETFPREGS
and PTRACE_GETFPXREGS is different enough that conversion would be
needed. With this patch, -EINVAL is returned if the non-native format is
requested.

The upside is, that this patchset fixes setting registers via ptrace
(which simply did not work before) as well as fixing setting floating
point registers using the mcontext on signal return on i386.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20240913133845.964292-1-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2024-10-10 12:03:55 +02:00

..

skas

um: fix time-travel syscall scheduling hack

2024-09-12 20:46:23 +02:00

asm-offsets.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

config.c.in

um: Add SPDX headers to files in arch/um/kernel/

2019-09-15 21:37:17 +02:00

dtb.c

um: Unconditionally call unflatten_device_tree()

2024-03-08 12:50:39 -06:00

dyn.lds.S

objtool/idle: Validate __cpuidle code as noinstr

2023-01-13 11:48:15 +01:00

early_printk.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

exec.c

um: Remove the call to SUBARCH_EXECVE1 macro

2024-09-12 20:42:22 +02:00

exitcode.c

proc: convert everything to "struct proc_ops"

2020-02-04 03:05:26 +00:00

gprof_syms.c

um: Add SPDX headers to files in arch/um/kernel/

2019-09-15 21:37:17 +02:00

initrd.c

um: Extract load file helper from initrd.c

2021-12-22 20:32:36 +01:00

ioport.c

um: add PCI over virtio emulation driver

2021-06-17 21:45:43 +02:00

irq.c

um: Enable preemption in UML

2024-07-03 17:10:43 +02:00

kmsg_dump.c

printk: Add a short description string to kmsg_dump()

2024-07-17 12:35:24 +02:00

ksyms.c

um: generalize os_rcv_fd

2024-07-03 12:24:25 +02:00

load_file.c

um: Extract load file helper from initrd.c

2021-12-22 20:32:36 +01:00

maccess.c

maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

2020-06-17 10:57:41 -07:00

Makefile

kbuild: use $(src) instead of $(srctree)/$(src) for source directory

2024-05-10 04:34:52 +09:00

mem.c

um: Remove highmem leftovers

2024-10-10 12:02:13 +02:00

physmem.c

um: Fix the definition for physmem_size

2024-10-10 12:02:13 +02:00

process.c

um: always use the internal copy of the FP registers

2024-10-10 12:03:55 +02:00

ptrace.c

um: Move declarations to proper headers

2024-04-22 21:58:48 +02:00

reboot.c

um: Remove unused mm_fd field from mm_id

2024-09-12 20:36:22 +02:00

sigio.c

um: Support dynamic IRQ allocation

2020-12-13 22:22:08 +01:00

signal.c

um: Drop support for hosts without SYSEMU_SINGLESTEP support

2024-01-04 23:29:11 +01:00

stacktrace.c

UML: add support for KASAN under x86_64

2022-07-17 23:35:22 +02:00

sysrq.c

um: Remove outdated asm/sysrq.h header

2024-09-12 20:44:11 +02:00

time.c

um: Remove unused mm_fd field from mm_id

2024-09-12 20:36:22 +02:00

tlb.c

um: Remove the redundant newpage check in update_pte_range

2024-09-12 20:34:39 +02:00

trap.c

um: refactor TLB update handling

2024-07-03 17:09:50 +02:00

um_arch.c

um: Fix the definition for physmem_size

2024-10-10 12:02:13 +02:00

um_arch.h

um: Move declarations to proper headers

2024-04-22 21:58:48 +02:00

umid.c

uml: Remove the initialization of statics to 0

2022-09-19 23:10:07 +02:00

uml.lds.S

objtool/idle: Validate __cpuidle code as noinstr

2023-01-13 11:48:15 +01:00

vmlinux.lds.S

UML: define RUNTIME_DISCARD_EXIT

2023-02-13 10:14:31 +01:00