compat.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2#ifndef __ASM_COMPAT_H
  3#define __ASM_COMPAT_H
  4
  5#define COMPAT_UTS_MACHINE	"riscv32\0\0"
  6
  7/*
  8 * Architecture specific compatibility types
  9 */
 10#include <linux/types.h>
 11#include <linux/sched.h>
 12#include <asm-generic/compat.h>
 13
 14static inline int is_compat_task(void)
 15{
 16	if (!IS_ENABLED(CONFIG_COMPAT))
 17		return 0;
 18
 19	return test_thread_flag(TIF_32BIT);
 20}
 21
 22static inline int is_compat_thread(struct thread_info *thread)
 23{
 24	if (!IS_ENABLED(CONFIG_COMPAT))
 25		return 0;
 26
 27	return test_ti_thread_flag(thread, TIF_32BIT);
 28}
 29
 30static inline void set_compat_task(bool is_compat)
 31{
 32	if (is_compat)
 33		set_thread_flag(TIF_32BIT);
 34	else
 35		clear_thread_flag(TIF_32BIT);
 36}
 37
 38struct compat_user_regs_struct {
 39	compat_ulong_t pc;
 40	compat_ulong_t ra;
 41	compat_ulong_t sp;
 42	compat_ulong_t gp;
 43	compat_ulong_t tp;
 44	compat_ulong_t t0;
 45	compat_ulong_t t1;
 46	compat_ulong_t t2;
 47	compat_ulong_t s0;
 48	compat_ulong_t s1;
 49	compat_ulong_t a0;
 50	compat_ulong_t a1;
 51	compat_ulong_t a2;
 52	compat_ulong_t a3;
 53	compat_ulong_t a4;
 54	compat_ulong_t a5;
 55	compat_ulong_t a6;
 56	compat_ulong_t a7;
 57	compat_ulong_t s2;
 58	compat_ulong_t s3;
 59	compat_ulong_t s4;
 60	compat_ulong_t s5;
 61	compat_ulong_t s6;
 62	compat_ulong_t s7;
 63	compat_ulong_t s8;
 64	compat_ulong_t s9;
 65	compat_ulong_t s10;
 66	compat_ulong_t s11;
 67	compat_ulong_t t3;
 68	compat_ulong_t t4;
 69	compat_ulong_t t5;
 70	compat_ulong_t t6;
 71};
 72
 73static inline void regs_to_cregs(struct compat_user_regs_struct *cregs,
 74				 struct pt_regs *regs)
 75{
 76	cregs->pc	= (compat_ulong_t) regs->epc;
 77	cregs->ra	= (compat_ulong_t) regs->ra;
 78	cregs->sp	= (compat_ulong_t) regs->sp;
 79	cregs->gp	= (compat_ulong_t) regs->gp;
 80	cregs->tp	= (compat_ulong_t) regs->tp;
 81	cregs->t0	= (compat_ulong_t) regs->t0;
 82	cregs->t1	= (compat_ulong_t) regs->t1;
 83	cregs->t2	= (compat_ulong_t) regs->t2;
 84	cregs->s0	= (compat_ulong_t) regs->s0;
 85	cregs->s1	= (compat_ulong_t) regs->s1;
 86	cregs->a0	= (compat_ulong_t) regs->a0;
 87	cregs->a1	= (compat_ulong_t) regs->a1;
 88	cregs->a2	= (compat_ulong_t) regs->a2;
 89	cregs->a3	= (compat_ulong_t) regs->a3;
 90	cregs->a4	= (compat_ulong_t) regs->a4;
 91	cregs->a5	= (compat_ulong_t) regs->a5;
 92	cregs->a6	= (compat_ulong_t) regs->a6;
 93	cregs->a7	= (compat_ulong_t) regs->a7;
 94	cregs->s2	= (compat_ulong_t) regs->s2;
 95	cregs->s3	= (compat_ulong_t) regs->s3;
 96	cregs->s4	= (compat_ulong_t) regs->s4;
 97	cregs->s5	= (compat_ulong_t) regs->s5;
 98	cregs->s6	= (compat_ulong_t) regs->s6;
 99	cregs->s7	= (compat_ulong_t) regs->s7;
100	cregs->s8	= (compat_ulong_t) regs->s8;
101	cregs->s9	= (compat_ulong_t) regs->s9;
102	cregs->s10	= (compat_ulong_t) regs->s10;
103	cregs->s11	= (compat_ulong_t) regs->s11;
104	cregs->t3	= (compat_ulong_t) regs->t3;
105	cregs->t4	= (compat_ulong_t) regs->t4;
106	cregs->t5	= (compat_ulong_t) regs->t5;
107	cregs->t6	= (compat_ulong_t) regs->t6;
108};
109
110static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
111				 struct pt_regs *regs)
112{
113	regs->epc	= (unsigned long) cregs->pc;
114	regs->ra	= (unsigned long) cregs->ra;
115	regs->sp	= (unsigned long) cregs->sp;
116	regs->gp	= (unsigned long) cregs->gp;
117	regs->tp	= (unsigned long) cregs->tp;
118	regs->t0	= (unsigned long) cregs->t0;
119	regs->t1	= (unsigned long) cregs->t1;
120	regs->t2	= (unsigned long) cregs->t2;
121	regs->s0	= (unsigned long) cregs->s0;
122	regs->s1	= (unsigned long) cregs->s1;
123	regs->a0	= (unsigned long) cregs->a0;
124	regs->a1	= (unsigned long) cregs->a1;
125	regs->a2	= (unsigned long) cregs->a2;
126	regs->a3	= (unsigned long) cregs->a3;
127	regs->a4	= (unsigned long) cregs->a4;
128	regs->a5	= (unsigned long) cregs->a5;
129	regs->a6	= (unsigned long) cregs->a6;
130	regs->a7	= (unsigned long) cregs->a7;
131	regs->s2	= (unsigned long) cregs->s2;
132	regs->s3	= (unsigned long) cregs->s3;
133	regs->s4	= (unsigned long) cregs->s4;
134	regs->s5	= (unsigned long) cregs->s5;
135	regs->s6	= (unsigned long) cregs->s6;
136	regs->s7	= (unsigned long) cregs->s7;
137	regs->s8	= (unsigned long) cregs->s8;
138	regs->s9	= (unsigned long) cregs->s9;
139	regs->s10	= (unsigned long) cregs->s10;
140	regs->s11	= (unsigned long) cregs->s11;
141	regs->t3	= (unsigned long) cregs->t3;
142	regs->t4	= (unsigned long) cregs->t4;
143	regs->t5	= (unsigned long) cregs->t5;
144	regs->t6	= (unsigned long) cregs->t6;
145};
146
147#endif /* __ASM_COMPAT_H */