processor.h (20b8547277a6e8ee1d928792c1b2782c9a2a6cf5) processor.h (65896545b69ffaac947c12e11d3dcc57fd1fb772)
1/*
2 * Based on arch/arm/include/asm/processor.h
3 *
4 * Copyright (C) 1995-1999 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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29/*
30 * Default implementation of macro that returns current
31 * instruction pointer ("program counter").
32 */
33#define current_text_addr() ({ __label__ _l; _l: &&_l;})
34
35#ifdef __KERNEL__
36
1/*
2 * Based on arch/arm/include/asm/processor.h
3 *
4 * Copyright (C) 1995-1999 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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29/*
30 * Default implementation of macro that returns current
31 * instruction pointer ("program counter").
32 */
33#define current_text_addr() ({ __label__ _l; _l: &&_l;})
34
35#ifdef __KERNEL__
36
37#include <linux/build_bug.h>
38#include <linux/stddef.h>
37#include <linux/string.h>
38
39#include <asm/alternative.h>
40#include <asm/cpufeature.h>
41#include <asm/hw_breakpoint.h>
42#include <asm/lse.h>
43#include <asm/pgtable-hwdef.h>
44#include <asm/ptrace.h>

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98 unsigned long x28;
99 unsigned long fp;
100 unsigned long sp;
101 unsigned long pc;
102};
103
104struct thread_struct {
105 struct cpu_context cpu_context; /* cpu context */
39#include <linux/string.h>
40
41#include <asm/alternative.h>
42#include <asm/cpufeature.h>
43#include <asm/hw_breakpoint.h>
44#include <asm/lse.h>
45#include <asm/pgtable-hwdef.h>
46#include <asm/ptrace.h>

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100 unsigned long x28;
101 unsigned long fp;
102 unsigned long sp;
103 unsigned long pc;
104};
105
106struct thread_struct {
107 struct cpu_context cpu_context; /* cpu context */
106 unsigned long tp_value; /* TLS register */
107#ifdef CONFIG_COMPAT
108 unsigned long tp2_value;
109#endif
110 struct user_fpsimd_state fpsimd_state;
108
109 /*
110 * Whitelisted fields for hardened usercopy:
111 * Maintainers must ensure manually that this contains no
112 * implicit padding.
113 */
114 struct {
115 unsigned long tp_value; /* TLS register */
116 unsigned long tp2_value;
117 struct user_fpsimd_state fpsimd_state;
118 } uw;
119
111 unsigned int fpsimd_cpu;
112 void *sve_state; /* SVE registers, if any */
113 unsigned int sve_vl; /* SVE vector length */
114 unsigned int sve_vl_onexec; /* SVE vl after next exec */
115 unsigned long fault_address; /* fault info */
116 unsigned long fault_code; /* ESR_EL1 value */
117 struct debug_info debug; /* debugging */
118};
119
120 unsigned int fpsimd_cpu;
121 void *sve_state; /* SVE registers, if any */
122 unsigned int sve_vl; /* SVE vector length */
123 unsigned int sve_vl_onexec; /* SVE vl after next exec */
124 unsigned long fault_address; /* fault info */
125 unsigned long fault_code; /* ESR_EL1 value */
126 struct debug_info debug; /* debugging */
127};
128
120/*
121 * Everything usercopied to/from thread_struct is statically-sized, so
122 * no hardened usercopy whitelist is needed.
123 */
124static inline void arch_thread_struct_whitelist(unsigned long *offset,
125 unsigned long *size)
126{
129static inline void arch_thread_struct_whitelist(unsigned long *offset,
130 unsigned long *size)
131{
127 *offset = *size = 0;
132 /* Verify that there is no padding among the whitelisted fields: */
133 BUILD_BUG_ON(sizeof_field(struct thread_struct, uw) !=
134 sizeof_field(struct thread_struct, uw.tp_value) +
135 sizeof_field(struct thread_struct, uw.tp2_value) +
136 sizeof_field(struct thread_struct, uw.fpsimd_state));
137
138 *offset = offsetof(struct thread_struct, uw);
139 *size = sizeof_field(struct thread_struct, uw);
128}
129
130#ifdef CONFIG_COMPAT
131#define task_user_tls(t) \
132({ \
133 unsigned long *__tls; \
134 if (is_compat_thread(task_thread_info(t))) \
140}
141
142#ifdef CONFIG_COMPAT
143#define task_user_tls(t) \
144({ \
145 unsigned long *__tls; \
146 if (is_compat_thread(task_thread_info(t))) \
135 __tls = &(t)->thread.tp2_value; \
147 __tls = &(t)->thread.uw.tp2_value; \
136 else \
148 else \
137 __tls = &(t)->thread.tp_value; \
149 __tls = &(t)->thread.uw.tp_value; \
138 __tls; \
139 })
140#else
150 __tls; \
151 })
152#else
141#define task_user_tls(t) (&(t)->thread.tp_value)
153#define task_user_tls(t) (&(t)->thread.uw.tp_value)
142#endif
143
144/* Sync TPIDR_EL0 back to thread_struct for current */
145void tls_preserve_current_state(void);
146
147#define INIT_THREAD { }
148
149static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)

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155
156/* Sync TPIDR_EL0 back to thread_struct for current */
157void tls_preserve_current_state(void);
158
159#define INIT_THREAD { }
160
161static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)

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