Differential D35393 Diff 108276 sys/kern/kern_sharedpage.c

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sys/kern/kern_sharedpage.c

Show First 20 Lines • Show All 299 Lines • ▼ Show 20 Lines	alloc_sv_fxrng_generation(void)
};		};
}		}
#endif /* RANDOM_FENESTRASX */		#endif /* RANDOM_FENESTRASX */

void		void
exec_sysvec_init(void *param)		exec_sysvec_init(void *param)
{		{
struct sysentvec *sv;		struct sysentvec *sv;
vm_offset_t sb;
#ifdef RANDOM_FENESTRASX
ptrdiff_t base;
#endif
u_int flags;		u_int flags;
int res;		int res;

sv = param;		sv = param;
flags = sv->sv_flags;		flags = sv->sv_flags;
if ((flags & SV_SHP) == 0)		if ((flags & SV_SHP) == 0)
return;		return;
MPASS(sv->sv_shared_page_obj == NULL);		MPASS(sv->sv_shared_page_obj == NULL);
MPASS(sv->sv_shared_page_base != 0);		MPASS(sv->sv_shared_page_base != 0);

sv->sv_shared_page_obj = shared_page_obj;		sv->sv_shared_page_obj = shared_page_obj;
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {		if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
if ((flags & SV_DSO_SIG) != 0) {		if ((flags & SV_DSO_SIG) != 0) {
sb = sv->sv_shared_page_base;
res = shared_page_fill((uintptr_t)sv->sv_szsigcode,		res = shared_page_fill((uintptr_t)sv->sv_szsigcode,
16, sv->sv_sigcode);		16, sv->sv_sigcode);
if (res == -1)		if (res == -1)
panic("copying sigtramp to shared page");		panic("copying vdso to shared page");
		kibUnsubmitted Not Done Inline Actions Perhaps change this instance of 'sigtramp' to 'vdso', since you reused the same string below. kib: Perhaps change this instance of 'sigtramp' to 'vdso', since you reused the same string below.
sb += res;		sv->sv_vdso_offset = res;
sv->sv_vdso_base = sb;		sv->sv_sigcode_offset = res + sv->sv_sigcodeoff;
sb += sv->sv_sigcodeoff;
sv->sv_sigcode_base = sb;
} else {		} else {
sv->sv_sigcode_base = sv->sv_shared_page_base +		res = shared_page_fill(*(sv->sv_szsigcode),
shared_page_fill(*(sv->sv_szsigcode), 16,		16, sv->sv_sigcode);
sv->sv_sigcode);		if (res == -1)
		panic("copying sigtramp to shared page");
		sv->sv_sigcode_offset = res;
}		}
}		}
if ((flags & SV_TIMEKEEP) != 0) {		if ((flags & SV_TIMEKEEP) != 0) {
#ifdef COMPAT_FREEBSD32		#ifdef COMPAT_FREEBSD32
if ((flags & SV_ILP32) != 0) {		if ((flags & SV_ILP32) != 0) {
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {		if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
KASSERT(compat32_svtk == NULL,		KASSERT(compat32_svtk == NULL,
("Compat32 already registered"));		("Compat32 already registered"));
compat32_svtk = alloc_sv_tk_compat32();		compat32_svtk = alloc_sv_tk_compat32();
} else {		} else {
KASSERT(compat32_svtk != NULL,		KASSERT(compat32_svtk != NULL,
("Compat32 not registered"));		("Compat32 not registered"));
}		}
sv->sv_timekeep_base = sv->sv_shared_page_base +		sv->sv_timekeep_offset = compat32_svtk->sv_timekeep_off;
compat32_svtk->sv_timekeep_off;
} else {		} else {
#endif		#endif
if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {		if ((flags & SV_ABI_MASK) == SV_ABI_FREEBSD) {
KASSERT(host_svtk == NULL,		KASSERT(host_svtk == NULL,
("Host already registered"));		("Host already registered"));
host_svtk = alloc_sv_tk();		host_svtk = alloc_sv_tk();
} else {		} else {
KASSERT(host_svtk != NULL,		KASSERT(host_svtk != NULL,
("Host not registered"));		("Host not registered"));
}		}
sv->sv_timekeep_base = sv->sv_shared_page_base +		sv->sv_timekeep_offset = host_svtk->sv_timekeep_off;
host_svtk->sv_timekeep_off;
#ifdef COMPAT_FREEBSD32		#ifdef COMPAT_FREEBSD32
}		}
#endif		#endif
}		}
#ifdef RANDOM_FENESTRASX		#ifdef RANDOM_FENESTRASX
if ((flags & (SV_ABI_MASK \| SV_RNG_SEED_VER)) ==		if ((flags & (SV_ABI_MASK \| SV_RNG_SEED_VER)) ==
(SV_ABI_FREEBSD \| SV_RNG_SEED_VER)) {		(SV_ABI_FREEBSD \| SV_RNG_SEED_VER)) {
/*		/*
* Only allocate a single VDSO entry for multiple sysentvecs,		* Only allocate a single VDSO entry for multiple sysentvecs,
* i.e., native and COMPAT32.		* i.e., native and COMPAT32.
*/		*/
if (fxrng_shpage_mapping == NULL)		if (fxrng_shpage_mapping == NULL)
alloc_sv_fxrng_generation();		alloc_sv_fxrng_generation();
base = (char *)fxrng_shpage_mapping - shared_page_mapping;		sv->sv_fxrng_gen_offset =
sv->sv_fxrng_gen_base = sv->sv_shared_page_base + base;		(char *)fxrng_shpage_mapping - shared_page_mapping;
}		}
#endif		#endif
}		}

void		void
exec_sysvec_init_secondary(struct sysentvec sv, struct sysentvec sv2)		exec_sysvec_init_secondary(struct sysentvec sv, struct sysentvec sv2)
{		{
MPASS((sv2->sv_flags & SV_ABI_MASK) == (sv->sv_flags & SV_ABI_MASK));		MPASS((sv2->sv_flags & SV_ABI_MASK) == (sv->sv_flags & SV_ABI_MASK));
MPASS((sv2->sv_flags & SV_TIMEKEEP) == (sv->sv_flags & SV_TIMEKEEP));		MPASS((sv2->sv_flags & SV_TIMEKEEP) == (sv->sv_flags & SV_TIMEKEEP));
MPASS((sv2->sv_flags & SV_SHP) != 0 && (sv->sv_flags & SV_SHP) != 0);		MPASS((sv2->sv_flags & SV_SHP) != 0 && (sv->sv_flags & SV_SHP) != 0);
MPASS((sv2->sv_flags & SV_DSO_SIG) == (sv->sv_flags & SV_DSO_SIG));		MPASS((sv2->sv_flags & SV_DSO_SIG) == (sv->sv_flags & SV_DSO_SIG));
MPASS((sv2->sv_flags & SV_RNG_SEED_VER) ==		MPASS((sv2->sv_flags & SV_RNG_SEED_VER) ==
(sv->sv_flags & SV_RNG_SEED_VER));		(sv->sv_flags & SV_RNG_SEED_VER));

sv2->sv_shared_page_obj = sv->sv_shared_page_obj;		sv2->sv_shared_page_obj = sv->sv_shared_page_obj;
sv2->sv_sigcode_base = sv2->sv_shared_page_base +		sv2->sv_sigcode_offset = sv->sv_sigcode_offset;
(sv->sv_sigcode_base - sv->sv_shared_page_base);		sv2->sv_vdso_offset = sv->sv_vdso_offset;
if ((sv2->sv_flags & SV_DSO_SIG) != 0) {
sv2->sv_vdso_base = sv2->sv_shared_page_base +
(sv->sv_vdso_base - sv->sv_shared_page_base);
}
if ((sv2->sv_flags & SV_ABI_MASK) != SV_ABI_FREEBSD)		if ((sv2->sv_flags & SV_ABI_MASK) != SV_ABI_FREEBSD)
return;		return;
if ((sv2->sv_flags & SV_TIMEKEEP) != 0) {		sv2->sv_timekeep_offset = sv->sv_timekeep_offset;
sv2->sv_timekeep_base = sv2->sv_shared_page_base +		sv2->sv_fxrng_gen_offset = sv->sv_fxrng_gen_offset;
(sv->sv_timekeep_base - sv->sv_shared_page_base);
}
if ((sv2->sv_flags & SV_RNG_SEED_VER) != 0) {
sv2->sv_fxrng_gen_base = sv2->sv_shared_page_base +
(sv->sv_fxrng_gen_base - sv->sv_shared_page_base);
}
}		}