[PATCH 03/13] riscv: compat: Add basic compat date type implementation

guoren at kernel.org guoren at kernel.org
Tue Dec 21 08:35:22 PST 2021


From: Guo Ren <guoren at linux.alibaba.com>

Implement asm/compat.h for struct compat_xxx, RLIM_INFINITY,
OFF_T_MAX, is_compat_task, compat_user_regset, regset convert.

Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
---
 arch/riscv/include/asm/compat.h      | 259 +++++++++++++++++++++++++++
 arch/riscv/include/asm/thread_info.h |   1 +
 2 files changed, 260 insertions(+)
 create mode 100644 arch/riscv/include/asm/compat.h

diff --git a/arch/riscv/include/asm/compat.h b/arch/riscv/include/asm/compat.h
new file mode 100644
index 000000000000..8e9777811f3b
--- /dev/null
+++ b/arch/riscv/include/asm/compat.h
@@ -0,0 +1,259 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_COMPAT_H
+#define __ASM_COMPAT_H
+
+#define compat_mode_t	compat_mode_t
+typedef u16		compat_mode_t;
+
+/*
+ * Architecture specific compatibility types
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+#include <asm-generic/compat.h>
+
+#define COMPAT_USER_HZ		100
+#define COMPAT_UTS_MACHINE	"riscv\0\0"
+
+typedef compat_uint_t	__compat_uid_t;
+typedef compat_uint_t	__compat_gid_t;
+typedef compat_uint_t	compat_dev_t;
+typedef compat_int_t	compat_ipc_pid_t;
+
+struct compat_stat {
+	compat_ulong_t	st_dev;
+	compat_ulong_t	st_ino;
+	compat_uint_t	st_mode;
+	compat_uint_t	st_nlink;
+	compat_uint_t	st_uid;
+	compat_uint_t	st_gid;
+	compat_ulong_t	st_rdev;
+	compat_ulong_t	__pad1;
+	compat_long_t	st_size;
+	compat_int_t	st_blksize;
+	compat_int_t	__pad2;
+	compat_long_t	st_blocks;
+	compat_long_t	st_atime;
+	compat_ulong_t	st_atime_nsec;
+	compat_long_t	st_mtime;
+	compat_ulong_t	st_mtime_nsec;
+	compat_long_t	st_ctime;
+	compat_ulong_t	st_ctime_nsec;
+	compat_uint_t	__unused4;
+	compat_uint_t	__unused5;
+};
+
+struct compat_flock {
+	compat_short_t	l_type;
+	compat_short_t	l_whence;
+	compat_off_t	l_start;
+	compat_off_t	l_len;
+	compat_pid_t	l_pid;
+	/* No __ARCH_FLOCK_PAD in riscv */
+};
+
+#define F_GETLK64	12
+#define F_SETLK64	13
+#define F_SETLKW64	14
+
+struct compat_flock64 {
+	compat_short_t	l_type;
+	compat_short_t	l_whence;
+	compat_loff_t	l_start;
+	compat_loff_t	l_len;
+	compat_pid_t	l_pid;
+	/* No __ARCH_FLOCK64_PAD in riscv */
+};
+
+struct compat_statfs {
+	compat_uint_t	f_type;
+	compat_uint_t	f_bsize;
+	compat_uint_t	f_blocks;
+	compat_uint_t	f_bfree;
+	compat_uint_t	f_bavail;
+	compat_uint_t	f_files;
+	compat_uint_t	f_ffree;
+	__kernel_fsid_t	f_fsid;
+	compat_uint_t	f_namelen;
+	compat_uint_t	f_frsize;
+	compat_uint_t	f_flags;
+	compat_uint_t	f_spare[4];
+};
+
+#define COMPAT_RLIM_INFINITY	0x7fffffff
+#define COMPAT_OFF_T_MAX	COMPAT_RLIM_INFINITY
+
+struct compat_ipc64_perm {
+	compat_key_t key;
+	__compat_uid32_t uid;
+	__compat_gid32_t gid;
+	__compat_uid32_t cuid;
+	__compat_gid32_t cgid;
+	compat_mode_t	mode;
+	unsigned char	__pad1[4 - sizeof(compat_mode_t)];
+	compat_ushort_t	seq;
+	compat_ushort_t	__pad2;
+	compat_ulong_t	unused1;
+	compat_ulong_t	unused2;
+};
+
+struct compat_semid64_ds {
+	struct compat_ipc64_perm sem_perm;
+	compat_ulong_t sem_otime;
+	compat_ulong_t sem_otime_high;
+	compat_ulong_t sem_ctime;
+	compat_ulong_t sem_ctime_high;
+	compat_ulong_t sem_nsems;
+	compat_ulong_t __unused3;
+	compat_ulong_t __unused4;
+};
+
+struct compat_msqid64_ds {
+	struct compat_ipc64_perm msg_perm;
+	compat_ulong_t msg_stime;
+	compat_ulong_t msg_stime_high;
+	compat_ulong_t msg_rtime;
+	compat_ulong_t msg_rtime_high;
+	compat_ulong_t msg_ctime;
+	compat_ulong_t msg_ctime_high;
+	compat_ulong_t msg_cbytes;
+	compat_ulong_t msg_qnum;
+	compat_ulong_t msg_qbytes;
+	compat_pid_t   msg_lspid;
+	compat_pid_t   msg_lrpid;
+	compat_ulong_t __unused4;
+	compat_ulong_t __unused5;
+};
+
+struct compat_shmid64_ds {
+	struct compat_ipc64_perm shm_perm;
+	compat_size_t  shm_segsz;
+	compat_ulong_t shm_atime;
+	compat_ulong_t shm_atime_high;
+	compat_ulong_t shm_dtime;
+	compat_ulong_t shm_dtime_high;
+	compat_ulong_t shm_ctime;
+	compat_ulong_t shm_ctime_high;
+	compat_pid_t   shm_cpid;
+	compat_pid_t   shm_lpid;
+	compat_ulong_t shm_nattch;
+	compat_ulong_t __unused4;
+	compat_ulong_t __unused5;
+};
+
+static inline int is_compat_task(void)
+{
+	return test_thread_flag(TIF_32BIT);
+}
+
+struct compat_user_regs_struct {
+	compat_ulong_t pc;
+	compat_ulong_t ra;
+	compat_ulong_t sp;
+	compat_ulong_t gp;
+	compat_ulong_t tp;
+	compat_ulong_t t0;
+	compat_ulong_t t1;
+	compat_ulong_t t2;
+	compat_ulong_t s0;
+	compat_ulong_t s1;
+	compat_ulong_t a0;
+	compat_ulong_t a1;
+	compat_ulong_t a2;
+	compat_ulong_t a3;
+	compat_ulong_t a4;
+	compat_ulong_t a5;
+	compat_ulong_t a6;
+	compat_ulong_t a7;
+	compat_ulong_t s2;
+	compat_ulong_t s3;
+	compat_ulong_t s4;
+	compat_ulong_t s5;
+	compat_ulong_t s6;
+	compat_ulong_t s7;
+	compat_ulong_t s8;
+	compat_ulong_t s9;
+	compat_ulong_t s10;
+	compat_ulong_t s11;
+	compat_ulong_t t3;
+	compat_ulong_t t4;
+	compat_ulong_t t5;
+	compat_ulong_t t6;
+};
+
+static inline void regs_to_cregs(struct compat_user_regs_struct *cregs,
+				 struct pt_regs *regs)
+{
+	cregs->pc = (compat_ulong_t) regs->epc;
+	cregs->ra = (compat_ulong_t) regs->ra;
+	cregs->sp = (compat_ulong_t) regs->sp;
+	cregs->gp = (compat_ulong_t) regs->gp;
+	cregs->tp = (compat_ulong_t) regs->tp;
+	cregs->t0 = (compat_ulong_t) regs->t0;
+	cregs->t1 = (compat_ulong_t) regs->t1;
+	cregs->t2 = (compat_ulong_t) regs->t2;
+	cregs->s0 = (compat_ulong_t) regs->s0;
+	cregs->s1 = (compat_ulong_t) regs->s1;
+	cregs->a0 = (compat_ulong_t) regs->a0;
+	cregs->a1 = (compat_ulong_t) regs->a1;
+	cregs->a2 = (compat_ulong_t) regs->a2;
+	cregs->a3 = (compat_ulong_t) regs->a3;
+	cregs->a4 = (compat_ulong_t) regs->a4;
+	cregs->a5 = (compat_ulong_t) regs->a5;
+	cregs->a6 = (compat_ulong_t) regs->a6;
+	cregs->a7 = (compat_ulong_t) regs->a7;
+	cregs->s2 = (compat_ulong_t) regs->s2;
+	cregs->s3 = (compat_ulong_t) regs->s3;
+	cregs->s4 = (compat_ulong_t) regs->s4;
+	cregs->s5 = (compat_ulong_t) regs->s5;
+	cregs->s6 = (compat_ulong_t) regs->s6;
+	cregs->s7 = (compat_ulong_t) regs->s7;
+	cregs->s8 = (compat_ulong_t) regs->s8;
+	cregs->s9 = (compat_ulong_t) regs->s9;
+	cregs->s10 = (compat_ulong_t) regs->s10;
+	cregs->s11 = (compat_ulong_t) regs->s11;
+	cregs->t3 = (compat_ulong_t) regs->t3;
+	cregs->t4 = (compat_ulong_t) regs->t4;
+	cregs->t5 = (compat_ulong_t) regs->t5;
+	cregs->t6 = (compat_ulong_t) regs->t6;
+};
+
+static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
+				 struct pt_regs *regs)
+{
+	regs->epc = (unsigned long) cregs->pc;
+	regs->ra = (unsigned long) cregs->ra;
+	regs->sp = (unsigned long) cregs->sp;
+	regs->gp = (unsigned long) cregs->gp;
+	regs->tp = (unsigned long) cregs->tp;
+	regs->t0 = (unsigned long) cregs->t0;
+	regs->t1 = (unsigned long) cregs->t1;
+	regs->t2 = (unsigned long) cregs->t2;
+	regs->s0 = (unsigned long) cregs->s0;
+	regs->s1 = (unsigned long) cregs->s1;
+	regs->a0 = (unsigned long) cregs->a0;
+	regs->a1 = (unsigned long) cregs->a1;
+	regs->a2 = (unsigned long) cregs->a2;
+	regs->a3 = (unsigned long) cregs->a3;
+	regs->a4 = (unsigned long) cregs->a4;
+	regs->a5 = (unsigned long) cregs->a5;
+	regs->a6 = (unsigned long) cregs->a6;
+	regs->a7 = (unsigned long) cregs->a7;
+	regs->s2 = (unsigned long) cregs->s2;
+	regs->s3 = (unsigned long) cregs->s3;
+	regs->s4 = (unsigned long) cregs->s4;
+	regs->s5 = (unsigned long) cregs->s5;
+	regs->s6 = (unsigned long) cregs->s6;
+	regs->s7 = (unsigned long) cregs->s7;
+	regs->s8 = (unsigned long) cregs->s8;
+	regs->s9 = (unsigned long) cregs->s9;
+	regs->s10 = (unsigned long) cregs->s10;
+	regs->s11 = (unsigned long) cregs->s11;
+	regs->t3 = (unsigned long) cregs->t3;
+	regs->t4 = (unsigned long) cregs->t4;
+	regs->t5 = (unsigned long) cregs->t5;
+	regs->t6 = (unsigned long) cregs->t6;
+};
+
+#endif /* __ASM_COMPAT_H */
diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h
index 60da0dcacf14..9392e35c689d 100644
--- a/arch/riscv/include/asm/thread_info.h
+++ b/arch/riscv/include/asm/thread_info.h
@@ -91,6 +91,7 @@ struct thread_info {
 #define TIF_SECCOMP		8	/* syscall secure computing */
 #define TIF_NOTIFY_SIGNAL	9	/* signal notifications exist */
 #define TIF_UPROBE		10	/* uprobe breakpoint or singlestep */
+#define TIF_32BIT		11	/* 32bit process */
 
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
-- 
2.25.1




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