Attachment 184641 Details for Bug 219399 – patch to move amd64 shared page to a lower address to avoid Ryzen problem with executing code near user address upper limit

[patch] patch to move amd64 shared page to a lower address to avoid Ryzen problem with executing code near user address upper limit

ryzen-shared-page.patch (text/plain), 1.44 KB, created by Don Lewis on 2017-07-23 20:52:54 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Don Lewis

Created: 2017-07-23 20:52:54 UTC

Size: 1.44 KB

patch

obsolete

>Index: sys/amd64/amd64/elf_machdep.c
>===================================================================
>--- sys/amd64/amd64/elf_machdep.c	(revision 320570)
>+++ sys/amd64/amd64/elf_machdep.c	(working copy)
>@@ -77,7 +77,7 @@
> 	.sv_fetch_syscall_args = cpu_fetch_syscall_args,
> 	.sv_syscallnames = syscallnames,
> 	.sv_shared_page_base = SHAREDPAGE,
>-	.sv_shared_page_len = PAGE_SIZE,
>+	.sv_shared_page_len = 2*PAGE_SIZE,
> 	.sv_schedtail	= NULL,
> 	.sv_thread_detach = NULL,
> 	.sv_trap	= NULL,
>Index: sys/amd64/include/vmparam.h
>===================================================================
>--- sys/amd64/include/vmparam.h	(revision 320570)
>+++ sys/amd64/include/vmparam.h	(working copy)
>@@ -176,7 +176,7 @@
> 
> #define	VM_MAXUSER_ADDRESS	UVADDR(NUPML4E, 0, 0, 0)
> 
>-#define	SHAREDPAGE		(VM_MAXUSER_ADDRESS - PAGE_SIZE)
>+#define	SHAREDPAGE		(VM_MAXUSER_ADDRESS - 2*PAGE_SIZE)
> #define	USRSTACK		SHAREDPAGE
> 
> #define	VM_MAX_ADDRESS		UPT_MAX_ADDRESS
>Index: sys/amd64/linux/linux_sysvec.c
>===================================================================
>--- sys/amd64/linux/linux_sysvec.c	(revision 320570)
>+++ sys/amd64/linux/linux_sysvec.c	(working copy)
>@@ -823,7 +823,7 @@
> 	.sv_fetch_syscall_args = linux_fetch_syscall_args,
> 	.sv_syscallnames = NULL,
> 	.sv_shared_page_base = SHAREDPAGE,
>-	.sv_shared_page_len = PAGE_SIZE,
>+	.sv_shared_page_len = 2*PAGE_SIZE,
> 	.sv_schedtail	= linux_schedtail,
> 	.sv_thread_detach = linux_thread_detach,
> 	.sv_trap	= linux_vsyscall,

Actions: View | Diff

Attachments on bug 219399: 182736 | 183054 | 184037 | 184051 | 184539 | 184542 | 184641 | 184707 | 184714 | 185022 | 186143