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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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20
cpu.c
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@ -174,13 +174,23 @@ void cpu_exec_unrealizefn(CPUState *cpu)
cpu_list_remove(cpu);
}
/*
* This can't go in hw/core/cpu.c because that file is compiled only
* once for both user-mode and system builds.
*/
static Property cpu_common_props[] = {
#ifndef CONFIG_USER_ONLY
#ifdef CONFIG_USER_ONLY
/*
* Create a memory property for softmmu CPU object,
* so users can wire up its memory. (This can't go in hw/core/cpu.c
* because that file is compiled only once for both user-mode
* and system builds.) The default if no link is set up is to use
* Create a property for the user-only object, so users can
* adjust prctl(PR_SET_UNALIGN) from the command-line.
* Has no effect if the target does not support the feature.
*/
DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState,
prctl_unalign_sigbus, false),
#else
/*
* Create a memory property for softmmu CPU object, so users can
* wire up its memory. The default if no link is set up is to use
* the system address space.
*/
DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION,