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linux-user: Add code for PR_GET/SET_UNALIGN

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This requires extra work for each target, but adds the
common syscall code, and the necessary flag in CPUState.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211227150127.2659293-4-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-12-27 07:01:24 -08:00 • committed by Laurent Vivier
parent 220717a6f4
commit 6e8dcacd08
4 changed files with 56 additions and 7 deletions
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27
linux-user/generic/target_prctl_unalign.h Normal file
View file

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/*
* Generic prctl unalign functions for linux-user
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef GENERIC_TARGET_PRCTL_UNALIGN_H
#define GENERIC_TARGET_PRCTL_UNALIGN_H
static abi_long do_prctl_get_unalign(CPUArchState *env, target_long arg2)
{
CPUState *cs = env_cpu(env);
uint32_t res = PR_UNALIGN_NOPRINT;
if (cs->prctl_unalign_sigbus) {
res |= PR_UNALIGN_SIGBUS;
}
return put_user_u32(res, arg2);
}
#define do_prctl_get_unalign do_prctl_get_unalign
static abi_long do_prctl_set_unalign(CPUArchState *env, target_long arg2)
{
env_cpu(env)->prctl_unalign_sigbus = arg2 & PR_UNALIGN_SIGBUS;
return 0;
}
#define do_prctl_set_unalign do_prctl_set_unalign
#endif /* GENERIC_TARGET_PRCTL_UNALIGN_H */