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-rw-r--r--arch/um/Kconfig35
-rw-r--r--arch/um/Kconfig.i38649
-rw-r--r--arch/um/Makefile-x86_644
-rw-r--r--arch/um/include/common-offsets.h11
-rw-r--r--arch/um/include/longjmp.h3
-rw-r--r--arch/um/include/os.h1
-rw-r--r--arch/um/include/sysdep-i386/kernel-offsets.h5
-rw-r--r--arch/um/include/sysdep-x86_64/kernel-offsets.h5
-rw-r--r--arch/um/kernel/skas/mmu.c5
-rw-r--r--arch/um/kernel/tt/uaccess_user.c6
-rw-r--r--arch/um/os-Linux/tt.c1
-rw-r--r--arch/um/os-Linux/util.c9
-rw-r--r--arch/um/sys-x86_64/ksyms.c3
13 files changed, 92 insertions, 45 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index d753075..78fb619 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -25,6 +25,19 @@ config PCI
config PCMCIA
bool
+# Yet to do!
+config TRACE_IRQFLAGS_SUPPORT
+ bool
+ default n
+
+config LOCKDEP_SUPPORT
+ bool
+ default y
+
+config STACKTRACE_SUPPORT
+ bool
+ default y
+
config GENERIC_CALIBRATE_DELAY
bool
default y
@@ -37,13 +50,15 @@ config IRQ_RELEASE_METHOD
menu "UML-specific options"
config MODE_TT
- bool "Tracing thread support"
+ bool "Tracing thread support (DEPRECATED)"
default n
help
This option controls whether tracing thread support is compiled
- into UML. This option is largely obsolete, given that skas0 provides
+ into UML. This option is largely obsolete, given that skas0 provides
skas security and performance without needing to patch the host.
- It is safe to say 'N' here.
+ It is safe to say 'N' here; saying 'Y' may cause additional problems
+ with the resulting binary even if you run UML in SKAS mode, and running
+ in TT mode is strongly *NOT RECOMMENDED*.
config STATIC_LINK
bool "Force a static link"
@@ -56,6 +71,9 @@ config STATIC_LINK
for use in a chroot jail. So, if you intend to run UML inside a
chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
here.
+ Additionally, this option enables using higher memory spaces (up to
+ 2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads
+ to best results for this.
config KERNEL_HALF_GIGS
int "Kernel address space size (in .5G units)"
@@ -72,10 +90,13 @@ config MODE_SKAS
default y
help
This option controls whether skas (separate kernel address space)
- support is compiled in. If you have applied the skas patch to the
- host, then you certainly want to say Y here (and consider saying N
- to CONFIG_MODE_TT). Otherwise, it is safe to say Y. Disabling this
- option will shrink the UML binary slightly.
+ support is compiled in.
+ Unless you have specific needs to use TT mode (which applies almost only
+ to developers), you should say Y here.
+ SKAS mode will make use of the SKAS3 patch if it is applied on the host
+ (and your UML will run in SKAS3 mode), but if no SKAS patch is applied
+ on the host it will run in SKAS0 mode, which is anyway faster than TT
+ mode.
source "arch/um/Kconfig.arch"
source "mm/Kconfig"
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index f6eb72d..f191a55 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -16,23 +16,42 @@ config SEMAPHORE_SLEEPERS
bool
default y
-config HOST_2G_2G
- bool "2G/2G host address space split"
- default n
- help
- This is needed when the host on which you run has a 2G/2G memory
- split, instead of the customary 3G/1G.
-
- Note that to enable such a host
- configuration, which makes sense only in some cases, you need special
- host patches.
-
- So, if you do not know what to do here, say 'N'.
+choice
+ prompt "Host memory split"
+ default HOST_VMSPLIT_3G
+ ---help---
+ This is needed when the host kernel on which you run has a non-default
+ (like 2G/2G) memory split, instead of the customary 3G/1G. If you did
+ not recompile your own kernel but use the default distro's one, you can
+ safely accept the "Default split" option.
+
+ It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
+ CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
+ patchset by Con Kolivas, or other ones) - option names match closely the
+ host CONFIG_VM_SPLIT_* ones.
+
+ A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
+ tolerate even more "normal" host kernels, but an higher setting will be
+ stricter.
+
+ So, if you do not know what to do here, say 'Default split'.
+
+ config HOST_VMSPLIT_3G
+ bool "Default split (3G/1G user/kernel host split)"
+ config HOST_VMSPLIT_3G_OPT
+ bool "3G/1G user/kernel host split (for full 1G low memory)"
+ config HOST_VMSPLIT_2G
+ bool "2G/2G user/kernel host split"
+ config HOST_VMSPLIT_1G
+ bool "1G/3G user/kernel host split"
+endchoice
config TOP_ADDR
- hex
- default 0xc0000000 if !HOST_2G_2G
- default 0x80000000 if HOST_2G_2G
+ hex
+ default 0xB0000000 if HOST_VMSPLIT_3G_OPT
+ default 0x78000000 if HOST_VMSPLIT_2G
+ default 0x40000000 if HOST_VMSPLIT_1G
+ default 0xC0000000
config 3_LEVEL_PGTABLES
bool "Three-level pagetables (EXPERIMENTAL)"
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 11154b6..d278682 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -1,10 +1,10 @@
# Copyright 2003 - 2004 Pathscale, Inc
# Released under the GPL
-core-y += arch/um/sys-x86_64/
+core-y += arch/um/sys-x86_64/ arch/x86_64/crypto/
START := 0x60000000
-_extra_flags_ = -fno-builtin -m64 -mcmodel=kernel
+_extra_flags_ = -fno-builtin -m64
#We #undef __x86_64__ for kernelspace, not for userspace where
#it's needed for headers to work!
diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h
index 356390d..461175f 100644
--- a/arch/um/include/common-offsets.h
+++ b/arch/um/include/common-offsets.h
@@ -1,9 +1,16 @@
/* for use by sys-$SUBARCH/kernel-offsets.c */
+DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
+#ifdef CONFIG_MODE_TT
+OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
+#endif
+
OFFSET(HOST_TASK_REGS, task_struct, thread.regs);
OFFSET(HOST_TASK_PID, task_struct, pid);
+
DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
+
DEFINE_STR(UM_KERN_EMERG, KERN_EMERG);
DEFINE_STR(UM_KERN_ALERT, KERN_ALERT);
DEFINE_STR(UM_KERN_CRIT, KERN_CRIT);
@@ -12,6 +19,10 @@ DEFINE_STR(UM_KERN_WARNING, KERN_WARNING);
DEFINE_STR(UM_KERN_NOTICE, KERN_NOTICE);
DEFINE_STR(UM_KERN_INFO, KERN_INFO);
DEFINE_STR(UM_KERN_DEBUG, KERN_DEBUG);
+
DEFINE(UM_ELF_CLASS, ELF_CLASS);
DEFINE(UM_ELFCLASS32, ELFCLASS32);
DEFINE(UM_ELFCLASS64, ELFCLASS64);
+
+/* For crypto assembler code. */
+DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
diff --git a/arch/um/include/longjmp.h b/arch/um/include/longjmp.h
index e93c6d3..e860bc5 100644
--- a/arch/um/include/longjmp.h
+++ b/arch/um/include/longjmp.h
@@ -12,7 +12,8 @@ extern void longjmp(jmp_buf, int);
} while(0)
#define UML_SETJMP(buf) ({ \
- int n, enable; \
+ int n; \
+ volatile int enable; \
enable = get_signals(); \
n = setjmp(*buf); \
if(n != 0) \
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 120ca21..6516f6d 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -201,6 +201,7 @@ extern int os_getpgrp(void);
#ifdef UML_CONFIG_MODE_TT
extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
+extern void stop(void);
#endif
extern void init_new_thread_signals(void);
extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
diff --git a/arch/um/include/sysdep-i386/kernel-offsets.h b/arch/um/include/sysdep-i386/kernel-offsets.h
index 2c13de3..97ec9d8 100644
--- a/arch/um/include/sysdep-i386/kernel-offsets.h
+++ b/arch/um/include/sysdep-i386/kernel-offsets.h
@@ -1,6 +1,7 @@
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/elf.h>
+#include <linux/crypto.h>
#include <asm/mman.h>
#define DEFINE(sym, val) \
@@ -17,9 +18,5 @@
void foo(void)
{
OFFSET(HOST_TASK_DEBUGREGS, task_struct, thread.arch.debugregs);
- DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
-#ifdef CONFIG_MODE_TT
- OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
-#endif
#include <common-offsets.h>
}
diff --git a/arch/um/include/sysdep-x86_64/kernel-offsets.h b/arch/um/include/sysdep-x86_64/kernel-offsets.h
index 91d129f..a307237 100644
--- a/arch/um/include/sysdep-x86_64/kernel-offsets.h
+++ b/arch/um/include/sysdep-x86_64/kernel-offsets.h
@@ -2,6 +2,7 @@
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/elf.h>
+#include <linux/crypto.h>
#include <asm/page.h>
#include <asm/mman.h>
@@ -18,9 +19,5 @@
void foo(void)
{
- DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
-#ifdef CONFIG_MODE_TT
- OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
-#endif
#include <common-offsets.h>
}
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index c17eddc..2c6d090 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -60,10 +60,7 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
#endif
*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
- /* This is wrong for the code page, but it doesn't matter since the
- * stub is mapped by hand with the correct permissions.
- */
- *pte = pte_mkwrite(*pte);
+ *pte = pte_mkread(*pte);
return(0);
out_pmd:
diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c
index 6c92bbc..ed1abcf 100644
--- a/arch/um/kernel/tt/uaccess_user.c
+++ b/arch/um/kernel/tt/uaccess_user.c
@@ -4,13 +4,13 @@
* Licensed under the GPL
*/
-#include <setjmp.h>
#include <string.h>
#include "user_util.h"
#include "uml_uaccess.h"
#include "task.h"
#include "kern_util.h"
#include "os.h"
+#include "longjmp.h"
int __do_copy_from_user(void *to, const void *from, int n,
void **fault_addr, void **fault_catcher)
@@ -80,10 +80,10 @@ int __do_strnlen_user(const char *str, unsigned long n,
struct tt_regs save = TASK_REGS(get_current())->tt;
int ret;
unsigned long *faddrp = (unsigned long *)fault_addr;
- sigjmp_buf jbuf;
+ jmp_buf jbuf;
*fault_catcher = &jbuf;
- if(sigsetjmp(jbuf, 1) == 0)
+ if(UML_SETJMP(&jbuf) == 0)
ret = strlen(str) + 1;
else ret = *faddrp - (unsigned long) str;
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
index 5461a06..3dc3a02 100644
--- a/arch/um/os-Linux/tt.c
+++ b/arch/um/os-Linux/tt.c
@@ -10,7 +10,6 @@
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
-#include <setjmp.h>
#include <sys/time.h>
#include <sys/ptrace.h>
#include <linux/ptrace.h>
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 3f5b151..56b8a50 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -80,11 +80,18 @@ void setup_machinename(char *machine_out)
struct utsname host;
uname(&host);
-#if defined(UML_CONFIG_UML_X86) && !defined(UML_CONFIG_64BIT)
+#ifdef UML_CONFIG_UML_X86
+# ifndef UML_CONFIG_64BIT
if (!strcmp(host.machine, "x86_64")) {
strcpy(machine_out, "i686");
return;
}
+# else
+ if (!strcmp(host.machine, "i686")) {
+ strcpy(machine_out, "x86_64");
+ return;
+ }
+# endif
#endif
strcpy(machine_out, host.machine);
}
diff --git a/arch/um/sys-x86_64/ksyms.c b/arch/um/sys-x86_64/ksyms.c
index 8592738..12c5936 100644
--- a/arch/um/sys-x86_64/ksyms.c
+++ b/arch/um/sys-x86_64/ksyms.c
@@ -14,6 +14,3 @@ EXPORT_SYMBOL(__up_wakeup);
/*XXX: we need them because they would be exported by x86_64 */
EXPORT_SYMBOL(__memcpy);
-
-/* Networking helper routines. */
-EXPORT_SYMBOL(ip_compute_csum);
generated by cgit v1.1 at 2025-08-17 22:43:19 +0000