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34306b05d3
Introduce a new common utility function get_current_context() which can be used to grab a ucontext without the help of libc, and also to detect if such ucontext has been successfully used by placing it on the stack as a fake sigframe. Reviewed-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2019 ARM Limited */
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#ifndef __TEST_SIGNALS_H__
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#define __TEST_SIGNALS_H__
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#include <signal.h>
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#include <stdbool.h>
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#include <ucontext.h>
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/*
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* Using ARCH specific and sanitized Kernel headers installed by KSFT
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* framework since we asked for it by setting flag KSFT_KHDR_INSTALL
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* in our Makefile.
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*/
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#include <asm/ptrace.h>
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#include <asm/hwcap.h>
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#define __stringify_1(x...) #x
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#define __stringify(x...) __stringify_1(x)
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#define get_regval(regname, out) \
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{ \
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asm volatile("mrs %0, " __stringify(regname) \
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: "=r" (out) \
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: \
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: "memory"); \
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}
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/*
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* Feature flags used in tdescr.feats_required to specify
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* any feature by the test
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*/
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enum {
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FSSBS_BIT,
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FMAX_END
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};
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#define FEAT_SSBS (1UL << FSSBS_BIT)
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/*
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* A descriptor used to describe and configure a test case.
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* Fields with a non-trivial meaning are described inline in the following.
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*/
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struct tdescr {
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/* KEEP THIS FIELD FIRST for easier lookup from assembly */
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void *token;
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/* when disabled token based sanity checking is skipped in handler */
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bool sanity_disabled;
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/* just a name for the test-case; manadatory field */
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char *name;
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char *descr;
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unsigned long feats_required;
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/* bitmask of effectively supported feats: populated at run-time */
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unsigned long feats_supported;
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bool initialized;
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unsigned int minsigstksz;
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/* signum used as a test trigger. Zero if no trigger-signal is used */
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int sig_trig;
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/*
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* signum considered as a successful test completion.
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* Zero when no signal is expected on success
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*/
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int sig_ok;
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/* signum expected on unsupported CPU features. */
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int sig_unsupp;
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/* a timeout in second for test completion */
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unsigned int timeout;
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bool triggered;
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bool pass;
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unsigned int result;
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/* optional sa_flags for the installed handler */
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int sa_flags;
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ucontext_t saved_uc;
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/* used by get_current_ctx() */
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size_t live_sz;
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ucontext_t *live_uc;
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volatile sig_atomic_t live_uc_valid;
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/* optional test private data */
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void *priv;
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/* a custom setup: called alternatively to default_setup */
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int (*setup)(struct tdescr *td);
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/* a custom init: called by default test init after test_setup */
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bool (*init)(struct tdescr *td);
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/* a custom cleanup function called before test exits */
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void (*cleanup)(struct tdescr *td);
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/* an optional function to be used as a trigger for starting test */
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int (*trigger)(struct tdescr *td);
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/*
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* the actual test-core: invoked differently depending on the
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* presence of the trigger function above; this is mandatory
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*/
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int (*run)(struct tdescr *td, siginfo_t *si, ucontext_t *uc);
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/* an optional function for custom results' processing */
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void (*check_result)(struct tdescr *td);
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};
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extern struct tdescr tde;
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#endif
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