Author: kib
Date: Fri Jun 22 07:16:29 2012
New Revision: 237435
URL: http://svn.freebsd.org/changeset/base/237435
Log:
Enable shared page on i386, now it has a use for vdso_timehands.
MFC after: 1 month
Modified:
head/sys/i386/i386/elf_machdep.c
head/sys/i386/include/vmparam.h
Modified: head/sys/i386/i386/elf_machdep.c
==============================================================================
--- head/sys/i386/i386/elf_machdep.c Fri Jun 22 07:13:30 2012
(r237434)
+++ head/sys/i386/i386/elf_machdep.c Fri Jun 22 07:16:29 2012
(r237435)
@@ -74,12 +74,15 @@ struct sysentvec elf32_freebsd_sysvec =
.sv_setregs = exec_setregs,
.sv_fixlimit = NULL,
.sv_maxssiz = NULL,
- .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32,
+ .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP,
.sv_set_syscall_retval = cpu_set_syscall_retval,
.sv_fetch_syscall_args = cpu_fetch_syscall_args,
.sv_syscallnames = syscallnames,
+ .sv_shared_page_base = SHAREDPAGE,
+ .sv_shared_page_len = PAGE_SIZE,
.sv_schedtail = NULL,
};
+INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec);
static Elf32_Brandinfo freebsd_brand_info = {
.brand = ELFOSABI_FREEBSD,
Modified: head/sys/i386/include/vmparam.h
==============================================================================
--- head/sys/i386/include/vmparam.h Fri Jun 22 07:13:30 2012
(r237434)
+++ head/sys/i386/include/vmparam.h Fri Jun 22 07:16:29 2012
(r237435)
@@ -165,7 +165,8 @@
#define VM_MAXUSER_ADDRESS VADDR(PTDPTDI, 0)
-#define USRSTACK VM_MAXUSER_ADDRESS
+#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
+#define USRSTACK SHAREDPAGE
#define VM_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
#define VM_MIN_ADDRESS ((vm_offset_t)0)
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