fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
qemu-cr16/linux-user
History
Arusekk c8e5aed246 linux-user: Add syscall dispatch support 
This commit adds support for the `prctl(PR_SET_SYSCALL_USER_DISPATCH)`
function in the Linux userspace emulator.

It is implemented as a fully host-independent function, by forcing
a SIGSYS early during syscall handling, if the PC is outside the
allowed range.

Since disabled SUD is indistinguishable from enabled SUD with
always-allowed region length == ~0, this encoding is used
instead of introducing a new flag.

Tested on [uglendix][1], will probably also apply to software like
tiny-wine, rpcsx, limbo, lazypoline, vicar, sysfail and endokernel,
to name a few.

[1]: https://sr.ht/~arusekk/uglendix

Signed-off-by: Arusekk <floss@arusekk.pl>
Message-ID: <20250711225226.14652-1-floss@arusekk.pl>
[rth: Split out is_vdso_sigreturn region matching and other minor tweaks.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2025-09-23 16:17:59 -07:00
..
aarch64 linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
alpha bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
arm linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
generic linux-user: Move TARGET_SA_RESTORER out of generic/signal.h 2025-02-18 08:29:03 -08:00
hexagon bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
hppa linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
i386 linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
include linux-user: cleanup unused linux-user/include/host directories 2023-08-08 20:44:08 +02:00
loongarch64 linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
m68k bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
microblaze bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
mips bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
mips64 linux-user: Standardize on ELF_MACHINE not ELF_ARCH 2025-08-30 07:04:04 +10:00
openrisc bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
ppc linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
riscv linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
s390x linux-user: Populate sigreturn_region_{start,end} in all vdso.S 2025-09-23 16:17:59 -07:00
sh4 bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
sparc bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
x86_64 linux-user: Standardize on ELF_MACHINE not ELF_ARCH 2025-08-30 07:04:04 +10:00
xtensa bsd-user, linux-user: introduce qemu_process_cpu_events 2025-09-17 19:00:56 +02:00
elfload.c linux-user: Populate vdso_sigreturn_region_{start,end} from sigtramp page 2025-09-23 16:17:59 -07:00
errnos.c.inc linux-user: Simplify host <-> target errno conversion using macros 2021-07-12 21:53:35 +02:00
exit.c accel/tcg: Move perf and debuginfo support to tcg/ 2024-01-29 21:04:10 +10:00
fd-trans.c linux-user: netlink: Add missing QEMU_IFLA entries 2025-01-24 13:58:40 +01:00
fd-trans.h linux-user: Hold the fd-trans lock across fork 2025-07-10 13:49:03 -06:00
flat.h linux-user/flatload.c: Remove unused bFLT shared-library and ZFLAT code 2024-04-25 10:21:06 +01:00
flatload.c include/exec: Split out mmap-lock.h 2025-04-23 14:08:17 -07:00
gen-vdso-elfn.c.inc linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
gen-vdso.c linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
ioctls.h linux-user: Add ioctl for BLKBSZSET 2024-06-05 09:04:30 -07:00
linux_loop.h linux-user: implement more loop ioctls 2021-11-29 14:54:17 +01:00
linuxload.c linux-user: Create do_init_main_thread 2025-08-28 06:39:25 +10:00
loader.h linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
main.c linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
meson.build plugins: fix inclusion of user-mode APIs 2025-07-14 11:42:49 +01:00
mmap.c linux-user/mmap.c: fix "of of" typo in comment 2025-05-09 23:49:26 +03:00
plugin-api.c plugins: fix inclusion of user-mode APIs 2025-07-14 11:42:49 +01:00
qemu.h linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
semihost.c semihosting: Remove qemu_semihosting_console_outs 2022-06-28 04:41:20 +05:30
signal-common.h linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
signal.c linux-user: Create vdso_sigreturn_region_{start,end} 2025-09-23 16:17:59 -07:00
socket.h Supply missing header guards 2019-06-12 13:20:21 +02:00
strace.c linux-user: Tidy print_socket_protocol 2025-08-30 06:59:26 +10:00
strace.h linux-user: Have do_syscall() use CPUArchState* instead of void* 2022-05-23 22:47:19 +02:00
strace.list linux-user: Add strace for rseq 2025-08-28 07:18:30 +10:00
syscall.c linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
syscall_defs.h linux-user: Add syscall dispatch support 2025-09-23 16:17:59 -07:00
syscall_types.h linux-user: Add FITRIM ioctl 2024-04-24 15:46:00 -07:00
thunk.c user: Move 'thunk.h' from 'exec/user' to 'user' 2024-05-03 17:21:20 +02:00
trace-events linux-user: Rename user_force_sig tracepoint to match function name 2022-01-18 12:41:42 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
uaccess.c meson: Make DEBUG_REMAP a meson option 2024-04-24 15:46:00 -07:00
uname.c linux-user: Remove pointless CPU{ARCH}State casts 2022-05-23 22:47:20 +02:00
uname.h linux-user: Have do_syscall() use CPUArchState* instead of void* 2022-05-23 22:47:19 +02:00
user-internals.h include: Remove 'exec/exec-all.h' 2025-04-30 12:45:05 -07:00
user-mmap.h user: Extract common MMAP API to 'user/mmap.h' 2025-03-09 14:54:32 +01:00
vm86.c linux-user/vm86: Fix compilation with Clang 2024-10-13 10:34:00 -07:00