Displaying 20 results from an estimated 22 matches for "saved_fs".
2007 Apr 18
1
[PATCH 7/21] i386 Losing fs gs to bios
...6:54:51.000000000 -0800
+++ linux-2.6.14-zach-work/include/asm-i386/desc.h 2005-11-05 00:28:10.000000000 -0800
@@ -158,6 +158,32 @@ static inline unsigned long get_desc_bas
return base;
}
+struct bios_segment_save {
+ struct desc_struct save_desc_40;
+ struct desc_struct *gdt;
+ unsigned short saved_fs;
+ unsigned short saved_gs;
+};
+
+static inline void prepare_bios_segments(struct bios_segment_save *save_area)
+{
+ int cpu = get_cpu();
+ struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+ save_area->gdt = gdt;
+ savesegment(fs, save_area->saved_fs);
+ savesegment(gs, save_area->saved_...
2007 Apr 18
1
[PATCH 7/21] i386 Losing fs gs to bios
...6:54:51.000000000 -0800
+++ linux-2.6.14-zach-work/include/asm-i386/desc.h 2005-11-05 00:28:10.000000000 -0800
@@ -158,6 +158,32 @@ static inline unsigned long get_desc_bas
return base;
}
+struct bios_segment_save {
+ struct desc_struct save_desc_40;
+ struct desc_struct *gdt;
+ unsigned short saved_fs;
+ unsigned short saved_gs;
+};
+
+static inline void prepare_bios_segments(struct bios_segment_save *save_area)
+{
+ int cpu = get_cpu();
+ struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+ save_area->gdt = gdt;
+ savesegment(fs, save_area->saved_fs);
+ savesegment(gs, save_area->saved_...
2007 Jun 27
0
[PATCH 1/10] Provide basic Xen PM infrastructure
...(9)
+ SAVE_GREG(10)
+ SAVE_GREG(11)
+ SAVE_GREG(12)
+ SAVE_GREG(13)
+ SAVE_GREG(14)
+ SAVE_GREG(15)
+ pushfq;
+ popq SAVED_GREG(flags)
+
+ mov %cr8, GREG(ax)
+ mov GREG(ax), REF(saved_cr8)
+
+ RDMSR(MSR_FS_BASE, saved_fs_base)
+ RDMSR(MSR_GS_BASE, saved_gs_base)
+ RDMSR(MSR_SHADOW_GS_BASE, saved_kernel_gs_base)
+
+#else /* !defined(__x86_64__) */
+
+ pushfl;
+ popl SAVED_GREG(flags)
+
+#endif
+
+ mov %ds, REF(saved_ds)
+ mov %es, REF(saved_es)
+ mov %f...
2014 Nov 02
1
[PATCH v4 10/10] x86: Support compiling out userspace IO (iopl and ioperm)
...);
@@ -298,6 +305,9 @@ static inline void init_tss_io(struct tss_struct *t)
*/
for (i = 0; i <= IO_BITMAP_LONGS; i++)
t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
}
/*
@@ -524,11 +534,13 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
/*
* fpu_counter contains the number of cons...
2014 Nov 02
1
[PATCH v4 10/10] x86: Support compiling out userspace IO (iopl and ioperm)
...);
@@ -298,6 +305,9 @@ static inline void init_tss_io(struct tss_struct *t)
*/
for (i = 0; i <= IO_BITMAP_LONGS; i++)
t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
}
/*
@@ -524,11 +534,13 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
/*
* fpu_counter contains the number of cons...
2013 Oct 22
0
[PATCH 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...for (i = 0; i <= IO_BITMAP_LONGS; i++)
+ t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
+}
+
/*
* Save the original ist values for checking stack pointers during debugging
*/
@@ -484,13 +508,16 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
};
+#ifdef CONFIG_X86_IOPORT
/*
* Set IOPL...
2014 Mar 11
0
[PATCHv2 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...for (i = 0; i <= IO_BITMAP_LONGS; i++)
+ t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
+}
+
/*
* Save the original ist values for checking stack pointers during debugging
*/
@@ -502,11 +526,13 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
/*
* fpu_counter contains the number of cons...
2013 Oct 26
1
[PATCH 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...> +#else
> + t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
> +#endif
> +}
> +
> /*
> * Save the original ist values for checking stack pointers during debugging
> */
> @@ -484,13 +508,16 @@ struct thread_struct {
> unsigned int saved_fs;
> unsigned int saved_gs;
> #endif
> +#ifdef CONFIG_X86_IOPORT
> /* IO permissions: */
> unsigned long *io_bitmap_ptr;
> unsigned long iopl;
> /* Max allowed port in the bitmap, in bytes: */
> un...
2013 Oct 26
1
[PATCH 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...> +#else
> + t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
> +#endif
> +}
> +
> /*
> * Save the original ist values for checking stack pointers during debugging
> */
> @@ -484,13 +508,16 @@ struct thread_struct {
> unsigned int saved_fs;
> unsigned int saved_gs;
> #endif
> +#ifdef CONFIG_X86_IOPORT
> /* IO permissions: */
> unsigned long *io_bitmap_ptr;
> unsigned long iopl;
> /* Max allowed port in the bitmap, in bytes: */
> un...
2014 Oct 29
4
[PATCH v3 1/3] x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling
The 32-bit and 64-bit versions of copy_thread have functionally
identical handling for copying the I/O bitmap, modulo differences in
error handling. Clean up the error paths in both by moving the copy of
the I/O bitmap to the end, to eliminate the need to free it if
subsequent copy steps fail; move the resulting identical code to a
static inline in a common header.
Signed-off-by: Josh Triplett
2014 Oct 29
4
[PATCH v3 1/3] x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling
The 32-bit and 64-bit versions of copy_thread have functionally
identical handling for copying the I/O bitmap, modulo differences in
error handling. Clean up the error paths in both by moving the copy of
the I/O bitmap to the end, to eliminate the need to free it if
subsequent copy steps fail; move the resulting identical code to a
static inline in a common header.
Signed-off-by: Josh Triplett
2014 Oct 29
0
[PATCH v3 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...> +#else
> + t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
> +#endif
> +}
> +
> /*
> * Save the original ist values for checking stack pointers during debugging
> */
> @@ -510,11 +534,13 @@ struct thread_struct {
> unsigned int saved_fs;
> unsigned int saved_gs;
> #endif
> +#ifdef CONFIG_X86_IOPORT
> /* IO permissions: */
> unsigned long *io_bitmap_ptr;
> unsigned long iopl;
> /* Max allowed port in the bitmap, in bytes: */
> un...
2013 Oct 22
9
[PATCH 0/3] x86: Support compiling out userspace I/O (iopl and ioperm)
This patch series makes it possible to compile out the iopl and ioperm system
calls, which allow privileged processes to request permission to directly poke
I/O ports from userspace.
Nothing on a modern Linux system uses these calls anymore, and anything new
should be using /dev/port instead, or better yet writing a driver.
Copying the bloat-o-meter stats from the final patch:
32-bit
2013 Oct 22
9
[PATCH 0/3] x86: Support compiling out userspace I/O (iopl and ioperm)
This patch series makes it possible to compile out the iopl and ioperm system
calls, which allow privileged processes to request permission to directly poke
I/O ports from userspace.
Nothing on a modern Linux system uses these calls anymore, and anything new
should be using /dev/port instead, or better yet writing a driver.
Copying the bloat-o-meter stats from the final patch:
32-bit
2014 Oct 29
2
[PATCH v3 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...for (i = 0; i <= IO_BITMAP_LONGS; i++)
+ t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
+}
+
/*
* Save the original ist values for checking stack pointers during debugging
*/
@@ -510,11 +534,13 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
/*
* fpu_counter contains the number of cons...
2014 Oct 29
2
[PATCH v3 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...for (i = 0; i <= IO_BITMAP_LONGS; i++)
+ t->io_bitmap[i] = ~0UL;
+#else
+ t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+#endif
+}
+
/*
* Save the original ist values for checking stack pointers during debugging
*/
@@ -510,11 +534,13 @@ struct thread_struct {
unsigned int saved_fs;
unsigned int saved_gs;
#endif
+#ifdef CONFIG_X86_IOPORT
/* IO permissions: */
unsigned long *io_bitmap_ptr;
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
+#endif /* CONFIG_X86_IOPORT */
/*
* fpu_counter contains the number of cons...
2013 Oct 31
1
[PATCH 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...t;io_bitmap[i] = ~0UL;
> +#else
> + t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
> +#endif
> +}
> +
> /*
> * Save the original ist values for checking stack pointers during debugging
> */
> @@ -484,13 +508,16 @@ struct thread_struct {
> unsigned int saved_fs;
> unsigned int saved_gs;
> #endif
> +#ifdef CONFIG_X86_IOPORT
> /* IO permissions: */
> unsigned long *io_bitmap_ptr;
> unsigned long iopl;
> /* Max allowed port in the bitmap, in bytes: */
> unsigned io_bitmap_max;
> +#endif /* CONFIG_X86_IOPORT */
>...
2013 Oct 31
1
[PATCH 3/3] x86: Support compiling out userspace I/O (iopl and ioperm)
...t;io_bitmap[i] = ~0UL;
> +#else
> + t->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
> +#endif
> +}
> +
> /*
> * Save the original ist values for checking stack pointers during debugging
> */
> @@ -484,13 +508,16 @@ struct thread_struct {
> unsigned int saved_fs;
> unsigned int saved_gs;
> #endif
> +#ifdef CONFIG_X86_IOPORT
> /* IO permissions: */
> unsigned long *io_bitmap_ptr;
> unsigned long iopl;
> /* Max allowed port in the bitmap, in bytes: */
> unsigned io_bitmap_max;
> +#endif /* CONFIG_X86_IOPORT */
>...
2014 Mar 11
2
[PATCHv2 1/3] x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling
The 32-bit and 64-bit versions of copy_thread have functionally
identical handling for copying the I/O bitmap, modulo differences in
error handling. Clean up the error paths in both by moving the copy of
the I/O bitmap to the end, to eliminate the need to free it if
subsequent copy steps fail; move the resulting identical code to a
static inline in a common header.
Signed-off-by: Josh Triplett
2014 Mar 11
2
[PATCHv2 1/3] x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling
The 32-bit and 64-bit versions of copy_thread have functionally
identical handling for copying the I/O bitmap, modulo differences in
error handling. Clean up the error paths in both by moving the copy of
the I/O bitmap to the end, to eliminate the need to free it if
subsequent copy steps fail; move the resulting identical code to a
static inline in a common header.
Signed-off-by: Josh Triplett