diff options
Diffstat (limited to 'sys/amd64/amd64/elf_machdep.c')
| -rw-r--r-- | sys/amd64/amd64/elf_machdep.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys/amd64/amd64/elf_machdep.c b/sys/amd64/amd64/elf_machdep.c index 1c3460eb031c..0a2a85144052 100644 --- a/sys/amd64/amd64/elf_machdep.c +++ b/sys/amd64/amd64/elf_machdep.c @@ -84,6 +84,25 @@ struct sysentvec elf64_freebsd_sysvec = { }; INIT_SYSENTVEC(elf64_sysvec, &elf64_freebsd_sysvec); +void +amd64_lower_shared_page(struct sysentvec *sv) +{ + if (hw_lower_amd64_sharedpage != 0) { + sv->sv_maxuser -= PAGE_SIZE; + sv->sv_shared_page_base -= PAGE_SIZE; + sv->sv_usrstack -= PAGE_SIZE; + sv->sv_psstrings -= PAGE_SIZE; + } +} + +/* + * Do this fixup before INIT_SYSENTVEC (SI_ORDER_ANY) because the latter + * uses the value of sv_shared_page_base. + */ +SYSINIT(elf64_sysvec_fixup, SI_SUB_EXEC, SI_ORDER_FIRST, + (sysinit_cfunc_t) amd64_lower_shared_page, + &elf64_freebsd_sysvec); + static Elf64_Brandinfo freebsd_brand_info = { .brand = ELFOSABI_FREEBSD, .machine = EM_X86_64, |