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Modify exec_sysvec_init() to allow non-native abi to setup their sysentvecs.

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For future use in the Linux emulation layer modify the exec_sysvec_init()
to allow non-native abi to fill sv_timekeep_base and sv_shared_page_obj.

Reviewed by:		kib
Differential revision:	https://reviews.freebsd.org/D30898
MFC after:		2 weeks
This commit is contained in:
Dmitry Chagin 2021-07-20 09:53:21 +03:00
parent 815165be20
commit 21629e2a45
1 changed files with 30 additions and 13 deletions
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31
sys/kern/kern_sharedpage.c
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@ -308,27 +308,43 @@ exec_sysvec_init(void *param)
#ifdef RANDOM_FENESTRASX
ptrdiff_t base;
#endif
u_int flags;
sv = (struct sysentvec *)param;
if ((sv->sv_flags & SV_SHP) == 0)
flags = sv->sv_flags;
if ((flags & SV_SHP) == 0)
return;
MPASS(sv->sv_shared_page_obj == NULL);
MPASS(sv->sv_shared_page_base != 0);
sv->sv_shared_page_obj = shared_page_obj;
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
sv->sv_sigcode_base = sv->sv_shared_page_base +
shared_page_fill(*(sv->sv_szsigcode), 16, sv->sv_sigcode);
if ((sv->sv_flags & SV_ABI_MASK) != SV_ABI_FREEBSD)
return;
if ((sv->sv_flags & SV_TIMEKEEP) != 0) {
}
if ((flags & SV_TIMEKEEP) != 0) {
#ifdef COMPAT_FREEBSD32
if ((sv->sv_flags & SV_ILP32) != 0) {
if ((flags & SV_ILP32) != 0) {
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
KASSERT(compat32_svtk == NULL,
("Compat32 already registered"));
compat32_svtk = alloc_sv_tk_compat32();
} else {
KASSERT(compat32_svtk != NULL,
("Compat32 not registered"));
}
sv->sv_timekeep_base = sv->sv_shared_page_base +
compat32_svtk->sv_timekeep_off;
} else {
#endif
KASSERT(host_svtk == NULL, ("Host already registered"));
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
KASSERT(host_svtk == NULL,
("Host already registered"));
host_svtk = alloc_sv_tk();
} else {
KASSERT(host_svtk != NULL,
("Host not registered"));
}
sv->sv_timekeep_base = sv->sv_shared_page_base +
host_svtk->sv_timekeep_off;
#ifdef COMPAT_FREEBSD32
@ -336,7 +352,8 @@ exec_sysvec_init(void *param)
#endif
}
#ifdef RANDOM_FENESTRASX
if ((sv->sv_flags & SV_RNG_SEED_VER) != 0) {
if ((flags & (SV_ABI_MASK | SV_RNG_SEED_VER)) ==
(SV_ABI_FREEBSD | SV_RNG_SEED_VER)) {
/*
* Only allocate a single VDSO entry for multiple sysentvecs,
* i.e., native and COMPAT32.