arm64: ptrace: add support for syscall emulation

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Add PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP support on arm64.
We don't need any special handling for PTRACE_SYSEMU_SINGLESTEP.

It's quite difficult to generalize handling PTRACE_SYSEMU cross
architectures and avoid calls to tracehook_report_syscall_entry twice.
Different architecture have different mechanism to indicate NO_SYSCALL
and trying to generalise adds more code for no gain.

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Sudeep Holla 2019-05-23 10:06:18 +01:00 • committed by Catalin Marinas

parent fd3866381b

commit f086f67485

2 changed files with 9 additions and 2 deletions

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5

arch/arm64/include/asm/thread_info.h

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6

arch/arm64/kernel/ptrace.c

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