Displaying 20 results from an estimated 58 matches for "__user_cs".
2011 Jul 27
9
[PATCH 0/5] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
Konrad, could you could test these on Xen and run 'test_vsyscall test' [1]?
I don't have a usable Xen setup.
Also, I'd appreciate a review of patches 4 and 5 from some
2011 Jul 27
9
[PATCH 0/5] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
Konrad, could you could test these on Xen and run 'test_vsyscall test' [1]?
I don't have a usable Xen setup.
Also, I'd appreciate a review of patches 4 and 5 from some
2011 Jul 27
9
[PATCH 0/5] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
Konrad, could you could test these on Xen and run 'test_vsyscall test' [1]?
I don't have a usable Xen setup.
Also, I'd appreciate a review of patches 4 and 5 from some
2011 Aug 03
10
[PATCH v2 0/6] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
- Patch 6 (optional) adds a trace event to vsyscall emulation. It will
make it easier to handle performance regression reports :)
[1]
2011 Aug 03
10
[PATCH v2 0/6] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
- Patch 6 (optional) adds a trace event to vsyscall emulation. It will
make it easier to handle performance regression reports :)
[1]
2011 Aug 03
10
[PATCH v2 0/6] Collected vdso/vsyscall fixes for 3.1
This fixes various problems that cropped up with the vdso patches.
- Patch 1 fixes an information leak to userspace.
- Patches 2 and 3 fix the kernel build on gold.
- Patches 4 and 5 fix Xen (I hope).
- Patch 6 (optional) adds a trace event to vsyscall emulation. It will
make it easier to handle performance regression reports :)
[1]
2007 Dec 18
2
[PATCH 1/2] remove __init modifier from header declaration
This patch removes the __init modifier from an extern function
declaration in acpi.h.
Besides not being strictly needed, it requires the inclusion of
linux/init.h, which is usually not even included directly, increasing
header mess by a lot.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
include/asm-x86/acpi.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
2007 Dec 18
2
[PATCH 1/2] remove __init modifier from header declaration
This patch removes the __init modifier from an extern function
declaration in acpi.h.
Besides not being strictly needed, it requires the inclusion of
linux/init.h, which is usually not even included directly, increasing
header mess by a lot.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
include/asm-x86/acpi.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
2007 Dec 18
3
[PATCH] finish processor.h integration
...S] = ~0 }, \
+}
+
+#define start_thread(regs, new_eip, new_esp) do { \
+ __asm__("movl %0,%%gs": :"r" (0)); \
+ regs->fs = 0; \
+ set_fs(USER_DS); \
+ regs->ds = __USER_DS; \
+ regs->es = __USER_DS; \
+ regs->ss = __USER_DS; \
+ regs->cs = __USER_CS; \
+ regs->ip = new_eip; \
+ regs->sp = new_esp; \
+} while (0)
+
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
+#define KSTK_TOP(info) \
+({...
2007 Dec 18
3
[PATCH] finish processor.h integration
...S] = ~0 }, \
+}
+
+#define start_thread(regs, new_eip, new_esp) do { \
+ __asm__("movl %0,%%gs": :"r" (0)); \
+ regs->fs = 0; \
+ set_fs(USER_DS); \
+ regs->ds = __USER_DS; \
+ regs->es = __USER_DS; \
+ regs->ss = __USER_DS; \
+ regs->cs = __USER_CS; \
+ regs->ip = new_eip; \
+ regs->sp = new_esp; \
+} while (0)
+
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
+#define KSTK_TOP(info) \
+({...
2020 May 18
2
[PATCH v3 31/75] x86/head/64: Install boot GDT
...TA_START(boot_gdt)
> + .quad 0
> + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
> + .quad 0x00af9a000000ffff /* __KERNEL_CS */
> + .quad 0x00cf92000000ffff /* __KERNEL_DS */
> + .quad 0 /* __USER32_CS - unused */
> + .quad 0 /* __USER_DS - unused */
> + .quad 0 /* __USER_CS - unused */
> + .quad 0 /* unused */
> + .quad 0x0080890000000000 /* TSS descriptor */
> + .quad 0x0000000000000000 /* TSS continued */
Any chance you could use macros ala GDT_ENTRY_INIT() for those instead
of the naked values?
--
Regards/Gruss,
Boris.
https://people.kernel...
2020 May 18
2
[PATCH v3 31/75] x86/head/64: Install boot GDT
...TA_START(boot_gdt)
> + .quad 0
> + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
> + .quad 0x00af9a000000ffff /* __KERNEL_CS */
> + .quad 0x00cf92000000ffff /* __KERNEL_DS */
> + .quad 0 /* __USER32_CS - unused */
> + .quad 0 /* __USER_DS - unused */
> + .quad 0 /* __USER_CS - unused */
> + .quad 0 /* unused */
> + .quad 0x0080890000000000 /* TSS descriptor */
> + .quad 0x0000000000000000 /* TSS continued */
Any chance you could use macros ala GDT_ENTRY_INIT() for those instead
of the naked values?
--
Regards/Gruss,
Boris.
https://people.kernel...
2007 Apr 18
2
[patch 3/8] Allow a kernel to not be in ring 0.
...9,10 +120,10 @@ static inline unsigned long get_segment_
}
/* The standard kernel/user address space limit. */
- *eip_limit = (seg & 3) ? USER_DS.seg : KERNEL_DS.seg;
+ *eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
/* By far the most common cases. */
- if (likely(seg == __USER_CS || seg == __KERNEL_CS))
+ if (likely(SEGMENT_IS_FLAT_CODE(seg)))
return eip;
/* Check the segment exists, is within the current LDT/GDT size,
@@ -436,11 +437,7 @@ good_area:
write = 0;
switch (error_code & 3) {
default: /* 3: write, present */
-#ifdef TEST_VERIFY_AREA
- if (regs...
2007 Apr 18
2
[patch 3/8] Allow a kernel to not be in ring 0.
...9,10 +120,10 @@ static inline unsigned long get_segment_
}
/* The standard kernel/user address space limit. */
- *eip_limit = (seg & 3) ? USER_DS.seg : KERNEL_DS.seg;
+ *eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
/* By far the most common cases. */
- if (likely(seg == __USER_CS || seg == __KERNEL_CS))
+ if (likely(SEGMENT_IS_FLAT_CODE(seg)))
return eip;
/* Check the segment exists, is within the current LDT/GDT size,
@@ -436,11 +437,7 @@ good_area:
write = 0;
switch (error_code & 3) {
default: /* 3: write, present */
-#ifdef TEST_VERIFY_AREA
- if (regs...
2008 Mar 04
3
32-on-64 sysenter for pvops
I implemented sysenter for 32-on-64, since it seemed straightforward
enough. It mostly works, but every now and again I get vcpus just
hanging in blocked state, as if events are being lost or ignored. Its
very similar to the symptoms that other people have reported against the
pvops kernel, which I have not managed to reproduce. Perhaps using
sysenter is exacerbating an existing bug...
2020 Apr 28
0
[PATCH v3 31/75] x86/head/64: Install boot GDT
...AL(boot_gdt_base, .quad 0)
+SYM_DATA_START(boot_gdt)
+ .quad 0
+ .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
+ .quad 0x00af9a000000ffff /* __KERNEL_CS */
+ .quad 0x00cf92000000ffff /* __KERNEL_DS */
+ .quad 0 /* __USER32_CS - unused */
+ .quad 0 /* __USER_DS - unused */
+ .quad 0 /* __USER_CS - unused */
+ .quad 0 /* unused */
+ .quad 0x0080890000000000 /* TSS descriptor */
+ .quad 0x0000000000000000 /* TSS continued */
+SYM_DATA_END_LABEL(boot_gdt, SYM_L_LOCAL, boot_gdt_end)
+
#include "../../x86/xen/xen-head.S"
__PAGE_ALIGNED_BSS
--
2.17.1
2020 Jun 04
0
[PATCH v3 31/75] x86/head/64: Install boot GDT
...d 0
> > + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
> > + .quad 0x00af9a000000ffff /* __KERNEL_CS */
> > + .quad 0x00cf92000000ffff /* __KERNEL_DS */
> > + .quad 0 /* __USER32_CS - unused */
> > + .quad 0 /* __USER_DS - unused */
> > + .quad 0 /* __USER_CS - unused */
> > + .quad 0 /* unused */
> > + .quad 0x0080890000000000 /* TSS descriptor */
> > + .quad 0x0000000000000000 /* TSS continued */
>
> Any chance you could use macros ala GDT_ENTRY_INIT() for those instead
> of the naked values?
Yeah, seems to work. U...
2020 Aug 07
0
[PATCH v3 4/7] x86/paravirt: remove 32-bit support from PARAVIRT_XXL
.../x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -68,12 +68,7 @@ struct paravirt_callee_save {
/* general info */
struct pv_info {
#ifdef CONFIG_PARAVIRT_XXL
- unsigned int kernel_rpl;
- int shared_kernel_pmd;
-
-#ifdef CONFIG_X86_64
u16 extra_user_64bit_cs; /* __USER_CS if none */
-#endif
#endif
const char *name;
@@ -126,9 +121,7 @@ struct pv_cpu_ops {
void (*set_ldt)(const void *desc, unsigned entries);
unsigned long (*store_tr)(void);
void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-#ifdef CONFIG_X86_64
void (*load_gs_index)(unsigned in...
2020 Aug 15
0
[PATCH v4 1/6] x86/paravirt: remove 32-bit support from PARAVIRT_XXL
.../x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -68,12 +68,7 @@ struct paravirt_callee_save {
/* general info */
struct pv_info {
#ifdef CONFIG_PARAVIRT_XXL
- unsigned int kernel_rpl;
- int shared_kernel_pmd;
-
-#ifdef CONFIG_X86_64
u16 extra_user_64bit_cs; /* __USER_CS if none */
-#endif
#endif
const char *name;
@@ -126,9 +121,7 @@ struct pv_cpu_ops {
void (*set_ldt)(const void *desc, unsigned entries);
unsigned long (*store_tr)(void);
void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-#ifdef CONFIG_X86_64
void (*load_gs_index)(unsigned in...
2007 Apr 18
1
[PATCH] Slight cleanups for x86 ring macros (against rc3-mm2)
...m-i386/segment.h
--- a/include/asm-i386/segment.h Mon Aug 07 13:30:17 2006 +1000
+++ b/include/asm-i386/segment.h Mon Aug 07 14:32:11 2006 +1000
@@ -83,10 +83,9 @@
#define GDT_SIZE (GDT_ENTRIES * 8)
-/*
- * Some tricky tests to match code segments after a fault
- */
+/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
#define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
+/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
/* Simple and small GDT entries for...