Differential D30902 Diff 91363 sys/i386/linux/linux_sysvec.c

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sys/i386/linux/linux_sysvec.c

Show First 20 Lines • Show All 905 Lines • ▼ Show 20 Lines	linux_on_exec_vmspace(struct proc p, struct image_params imgp)
if (SV_PROC_FLAG(p, SV_SHP) != 0)		if (SV_PROC_FLAG(p, SV_SHP) != 0)
error = linux_map_vdso(p, linux_vdso_obj,		error = linux_map_vdso(p, linux_vdso_obj,
linux_vdso_base, LINUX_VDSOPAGE_SIZE, imgp);		linux_vdso_base, LINUX_VDSOPAGE_SIZE, imgp);
if (error == 0)		if (error == 0)
linux_on_exec(p, imgp);		linux_on_exec(p, imgp);
return (error);		return (error);
}		}

		/*
		* linux_vdso_install() and linux_exec_sysvec_init() must be called
		* after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY).
		*/
static void		static void
linux_exec_sysvec_init(void *param)		linux_exec_sysvec_init(void *param)
{		{
l_uintptr_t ktimekeep_base, ktsc_selector;		l_uintptr_t ktimekeep_base, ktsc_selector;
struct sysentvec *sv;		struct sysentvec *sv;
ptrdiff_t tkoff;		ptrdiff_t tkoff;

sv = param;		sv = param;
/* Fill timekeep_base */		/* Fill timekeep_base */
exec_sysvec_init_abi(sv);		exec_sysvec_init_abi(sv);

tkoff = kern_timekeep_base - linux_vdso_base;		tkoff = kern_timekeep_base - linux_vdso_base;
ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff);		ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff);
*ktimekeep_base = sv->sv_timekeep_base;		*ktimekeep_base = sv->sv_timekeep_base;

tkoff = kern_tsc_selector - linux_vdso_base;		tkoff = kern_tsc_selector - linux_vdso_base;
ktsc_selector = (l_uintptr_t *)(linux_vdso_mapping + tkoff);		ktsc_selector = (l_uintptr_t *)(linux_vdso_mapping + tkoff);
*ktsc_selector = linux_vdso_tsc_selector_idx();		*ktsc_selector = linux_vdso_tsc_selector_idx();
if (bootverbose)		if (bootverbose)
printf("Linux i386 vDSO tsc_selector: %u\n", *ktsc_selector);		printf("Linux i386 vDSO tsc_selector: %u\n", *ktsc_selector);
}		}
SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC, SI_ORDER_ANY,		SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC + 1, SI_ORDER_ANY,
linux_exec_sysvec_init, &elf_linux_sysvec);		linux_exec_sysvec_init, &elf_linux_sysvec);

static void		static void
linux_vdso_install(const void *param)		linux_vdso_install(const void *param)
{		{
char *vdso_start = &_binary_linux_vdso_so_o_start;		char *vdso_start = &_binary_linux_vdso_so_o_start;
char *vdso_end = &_binary_linux_vdso_so_o_end;		char *vdso_end = &_binary_linux_vdso_so_o_end;

linux_szsigcode = vdso_end - vdso_start;		linux_szsigcode = vdso_end - vdso_start;
MPASS(linux_szsigcode <= LINUX_VDSOPAGE_SIZE);		MPASS(linux_szsigcode <= LINUX_VDSOPAGE_SIZE);

linux_vdso_base = LINUX_VDSOPAGE;		linux_vdso_base = LINUX_VDSOPAGE;

__elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base);		__elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base);

linux_vdso_obj = __elfN(linux_shared_page_init)		linux_vdso_obj = __elfN(linux_shared_page_init)
(&linux_vdso_mapping, LINUX_VDSOPAGE_SIZE);		(&linux_vdso_mapping, LINUX_VDSOPAGE_SIZE);
bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode);		bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode);

linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base);		linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base);
}		}
SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_FIRST,		SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC + 1, SI_ORDER_FIRST,
linux_vdso_install, NULL);		linux_vdso_install, NULL);

static void		static void
linux_vdso_deinstall(const void *param)		linux_vdso_deinstall(const void *param)
{		{

__elfN(linux_shared_page_fini)(linux_vdso_obj,		__elfN(linux_shared_page_fini)(linux_vdso_obj,
linux_vdso_mapping, LINUX_VDSOPAGE_SIZE);		linux_vdso_mapping, LINUX_VDSOPAGE_SIZE);
▲ Show 20 Lines • Show All 194 Lines • ▼ Show 20 Lines
static moduledata_t linux_elf_mod = {		static moduledata_t linux_elf_mod = {
"linuxelf",		"linuxelf",
linux_elf_modevent,		linux_elf_modevent,
0		0
};		};

DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);		DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);
FEATURE(linux, "Linux 32bit support");		FEATURE(linux, "Linux 32bit support");

		/*
		* linux_vdso_install() and linux_exec_sysvec_init() must be called
		* after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY).
		*/