Lines Matching +full:two +full:- +full:user

1 /* SPDX-License-Identifier: GPL-2.0 */
13 	((((base)  & _AC(0xff000000,ULL)) << (56-24)) |	\
15 	 (((limit) & _AC(0x000f0000,ULL)) << (48-16)) |	\
29  * Bottom two bits of selector give the ring
37  * determine whether the context is user mode or kernel mode with
46 /* User mode is privilege level 3: */
60  * The layout of the per-CPU GDT under Linux:
62  *   0 - null								<=== cacheline #1
63  *   1 - reserved
64  *   2 - reserved
65  *   3 - reserved
67  *   4 - unused								<=== cacheline #2
68  *   5 - unused
70  *  ------- start of TLS (Thread-Local Storage) segments:
72  *   6 - TLS segment #1			[ glibc's TLS segment ]
73  *   7 - TLS segment #2			[ Wine's %fs Win32 segment ]
74  *   8 - TLS segment #3							<=== cacheline #3
75  *   9 - reserved
76  *  10 - reserved
77  *  11 - reserved
79  *  ------- start of kernel segments:
81  *  12 - kernel code segment						<=== cacheline #4
82  *  13 - kernel data segment
83  *  14 - default user CS
84  *  15 - default user DS
85  *  16 - TSS								<=== cacheline #5
86  *  17 - LDT
87  *  18 - PNPBIOS support (16->32 gate)
88  *  19 - PNPBIOS support
89  *  20 - PNPBIOS support						<=== cacheline #6
90  *  21 - PNPBIOS support
91  *  22 - PNPBIOS support
92  *  23 - APM BIOS support
93  *  24 - APM BIOS support						<=== cacheline #7
94  *  25 - APM BIOS support
96  *  26 - ESPFIX small SS
97  *  27 - per-cpu			[ offset to per-cpu data area ]
98  *  28 - stack_canary-20		[ for stack protector ]		<=== cacheline #8
99  *  29 - unused
100  *  30 - unused
101  *  31 - TSS for double fault handler
104 #define GDT_ENTRY_TLS_MAX 		(GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
167 #else /* 64-bit: */
176  * We cannot use the same code segment descriptor for user and kernel mode,
179  * GDT layout to get 64-bit SYSCALL/SYSRET support right. SYSRET hardcodes
182  *   if returning to 32-bit userspace: cs = STAR.SYSRET_CS,
183  *   if returning to 64-bit userspace: cs = STAR.SYSRET_CS+16,
187  * thus USER_DS should be between 32-bit and 64-bit code selectors:
193 /* Needs two entries */
195 /* Needs two entries */
212  * expressed with the +3 value for user-space selectors:
282  * vector has no error code (two bytes), a 'push $vector_number' (two
307  * This is always the case on Intel CPUs and, even on 64-bit AMD CPUs, any
335  * On 32-bit systems, the hidden parts of FS and GS are unobservable if
367  * x86-32 user GS accessors:
373 #  define task_user_gs(tsk)		((tsk)->thread.gs)
377 #  define get_user_gs(regs)		(u16)((regs)->gs)
378 #  define set_user_gs(regs, v)		do { (regs)->gs = (v); } while (0)
379 #  define task_user_gs(tsk)		(task_pt_regs(tsk)->gs)