Ammar Faizi 7cb46fa16b x86: um: vdso: Add '%rcx' and '%r11' to the syscall clobber list ...

[ Upstream commit 5541992e51 ]

The 'syscall' instruction clobbers '%rcx' and '%r11', but they are not
listed in the inline Assembly that performs the syscall instruction.

No real bug is found. It wasn't buggy by luck because '%rcx' and '%r11'
are caller-saved registers, and not used in the functions, and the
functions are never inlined.

Add them to the clobber list for code correctness.

Fixes: f1c2bb8b99 ("um: implement a x86_64 vDSO")
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-03-11 16:40:11 +01:00

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asm

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os-Linux

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shared/sysdep

um: Cleanup syscall_handler_t cast in syscalls_32.h

2022-10-15 07:55:52 +02:00

vdso

x86: um: vdso: Add '%rcx' and '%r11' to the syscall clobber list

2023-03-11 16:40:11 +01:00

bugs_32.c

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bugs_64.c

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checksum_32.S

x86: Prepare asm files for straight-line-speculation

2022-07-25 11:26:28 +02:00

delay.c

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elfcore.c

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fault.c

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Kconfig

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ldt.c

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Makefile

x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y

2022-08-21 15:16:13 +02:00

mem_32.c

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mem_64.c

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ptrace_32.c

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ptrace_64.c

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ptrace_user.c

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setjmp_32.S

x86: Prepare asm files for straight-line-speculation

2022-07-25 11:26:28 +02:00

setjmp_64.S

x86: Prepare asm files for straight-line-speculation

2022-07-25 11:26:28 +02:00

signal.c

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stub_32.S

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stub_64.S

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stub_segv.c

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sys_call_table_32.c

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sys_call_table_64.c

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syscalls_32.c

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syscalls_64.c

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sysrq_32.c

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sysrq_64.c

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tls_32.c

um: Cleanup compiler warning in arch/x86/um/tls_32.c

2022-10-15 07:55:53 +02:00

tls_64.c

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user-offsets.c

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