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Differential D30902 Diff 91354 sys/amd64/linux/linux_sysvec.c

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sys/amd64/linux/linux_sysvec.c

Show First 20 Lines • Show All 815 Lines • ▼ Show 20 Lineslinux_exec_sysvec_init(void *param)
*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 x86-64 vDSO tsc_selector: %lu\n", *ktsc_selector); printf("Linux x86-64 vDSO tsc_selector: %lu\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,
emasteUnsubmitted
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Since the + 1 carries no context I think it would be worth a comment, e.g. mentioning that exec_sysvec_init is SI_SUB_EXEC and this must be after?

emaste: Since the `+ 1` carries no context I think it would be worth a comment, e.g. mentioning that…
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_LA48; linux_vdso_base = LINUX_VDSOPAGE_LA48;
if (hw_lower_amd64_sharedpage != 0) if (hw_lower_amd64_sharedpage != 0)
linux_vdso_base -= PAGE_SIZE; linux_vdso_base -= PAGE_SIZE;
__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);
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