linux-user: Extract target errno to 'target_errno_defs.h'

We want to access the target errno indepently of the rest of the
linux-user code. Move the header containing the generic errno
definitions (

linux-user: Extract target errno to 'target_errno_defs.h'

We want to access the target errno indepently of the rest of the
linux-user code. Move the header containing the generic errno
definitions ('errno_defs.h') to 'generic/target_errno_defs.h',
create a new 'target_errno_defs.h' in each target which itself
includes 'generic/target_errno_defs.h'.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210708170550.1846343-4-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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linux-user: Pass CPUArchState to target_restore_altstack

In most cases we were already passing get_sp_from_cpustate
directly to the function. In other cases, we were passing
a local variable which

linux-user: Pass CPUArchState to target_restore_altstack

In most cases we were already passing get_sp_from_cpustate
directly to the function. In other cases, we were passing
a local variable which already contained the same value.
In the rest of the cases, we were passing the stack pointer
out of env directly.

Reviewed by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210426025334.1168495-5-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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linux-user: Use target_restore_altstack in all sigreturn

Note that target_restore_altstack uses the host memory
pointer that we have already verified, so TARGET_EFAULT
is not a possible return value

linux-user: Use target_restore_altstack in all sigreturn

Note that target_restore_altstack uses the host memory
pointer that we have already verified, so TARGET_EFAULT
is not a possible return value.

Note that using -EFAULT was a bug.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210426025334.1168495-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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semihosting: Move include/hw/semihosting/ -> include/semihosting/

We want to move the semihosting code out of hw/ in the next patch.

This patch contains the mechanical steps, created using:

$ gi

semihosting: Move include/hw/semihosting/ -> include/semihosting/

We want to move the semihosting code out of hw/ in the next patch.

This patch contains the mechanical steps, created using:

$ git mv include/hw/semihosting/ include/
$ sed -i s,hw/semihosting,semihosting, $(git grep -l hw/semihosting)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210226131356.3964782-2-f4bug@amsat.org>
Message-Id: <20210305135451.15427-2-alex.bennee@linaro.org>

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linux-user/aarch64: Signal SEGV_MTEAERR for async tag check error

The real kernel collects _TIF_MTE_ASYNC_FAULT into the current thread's
state on any kernel entry (interrupt, exception etc), and th

linux-user/aarch64: Signal SEGV_MTEAERR for async tag check error

The real kernel collects _TIF_MTE_ASYNC_FAULT into the current thread's
state on any kernel entry (interrupt, exception etc), and then delivers
the signal in advance of resuming the thread.

This means that while the signal won't be delivered immediately, it will
not be delayed forever -- at minimum it will be delivered after the next
clock interrupt.

We don't have a clock interrupt in linux-user, so we issue a cpu_kick
to signal a return to the main loop at the end of the current TB.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-29-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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linux-user/aarch64: Signal SEGV_MTESERR for sync tag check fault

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 202

linux-user/aarch64: Signal SEGV_MTESERR for sync tag check fault

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-28-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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linux-user/aarch64: Pass syndrome to EXC_*_ABORT

A proper syndrome is required to fill in the proper si_code.
Use page_get_flags to determine permission vs translation for user-only.

Reviewed-by: P

linux-user/aarch64: Pass syndrome to EXC_*_ABORT

A proper syndrome is required to fill in the proper si_code.
Use page_get_flags to determine permission vs translation for user-only.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-27-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG

These prctl fields are required for the function of MTE.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henders

linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG

These prctl fields are required for the function of MTE.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-24-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE

This is the prctl bit that controls whether syscalls accept tagged
addresses. See Documentation/arm64/tagged-address-abi.rst in the
linux kernel.

linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE

This is the prctl bit that controls whether syscalls accept tagged
addresses. See Documentation/arm64/tagged-address-abi.rst in the
linux kernel.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-21-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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