ARM: rockchip: rk3228: implement function rk3228_restart
[firefly-linux-kernel-4.4.55.git] / arch / mips / kernel / binfmt_elfo32.c
1 /*
2  * Support for o32 Linux/MIPS ELF binaries.
3  *
4  * Copyright (C) 1999, 2001 Ralf Baechle
5  * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
6  *
7  * Heavily inspired by the 32-bit Sparc compat code which is
8  * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
9  * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
10  */
11
12 #define ELF_ARCH                EM_MIPS
13 #define ELF_CLASS               ELFCLASS32
14 #ifdef __MIPSEB__
15 #define ELF_DATA                ELFDATA2MSB;
16 #else /* __MIPSEL__ */
17 #define ELF_DATA                ELFDATA2LSB;
18 #endif
19
20 /* ELF register definitions */
21 #define ELF_NGREG       45
22 #define ELF_NFPREG      33
23
24 typedef unsigned int elf_greg_t;
25 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
26
27 typedef double elf_fpreg_t;
28 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
29
30 /*
31  * This is used to ensure we don't load something for the wrong architecture.
32  */
33 #define elf_check_arch(hdr)                                             \
34 ({                                                                      \
35         int __res = 1;                                                  \
36         struct elfhdr *__h = (hdr);                                     \
37                                                                         \
38         if (__h->e_machine != EM_MIPS)                                  \
39                 __res = 0;                                              \
40         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
41                 __res = 0;                                              \
42         if ((__h->e_flags & EF_MIPS_ABI2) != 0)                         \
43                 __res = 0;                                              \
44         if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                      \
45             ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \
46                 __res = 0;                                              \
47                                                                         \
48         __res;                                                          \
49 })
50
51 #ifdef CONFIG_KVM_GUEST
52 #define TASK32_SIZE             0x3fff8000UL
53 #else
54 #define TASK32_SIZE             0x7fff8000UL
55 #endif
56 #undef ELF_ET_DYN_BASE
57 #define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)
58
59 #include <asm/processor.h>
60
61 /* These MUST be defined before elf.h gets included */
62 extern void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs);
63 #define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);
64 #define ELF_CORE_COPY_TASK_REGS(_tsk, _dest)                            \
65 ({                                                                      \
66         int __res = 1;                                                  \
67         elf32_core_copy_regs(*(_dest), task_pt_regs(_tsk));             \
68         __res;                                                          \
69 })
70
71 #include <linux/module.h>
72 #include <linux/elfcore.h>
73 #include <linux/compat.h>
74 #include <linux/math64.h>
75
76 #define elf_prstatus elf_prstatus32
77 struct elf_prstatus32
78 {
79         struct elf_siginfo pr_info;     /* Info associated with signal */
80         short   pr_cursig;              /* Current signal */
81         unsigned int pr_sigpend;        /* Set of pending signals */
82         unsigned int pr_sighold;        /* Set of held signals */
83         pid_t   pr_pid;
84         pid_t   pr_ppid;
85         pid_t   pr_pgrp;
86         pid_t   pr_sid;
87         struct compat_timeval pr_utime; /* User time */
88         struct compat_timeval pr_stime; /* System time */
89         struct compat_timeval pr_cutime;/* Cumulative user time */
90         struct compat_timeval pr_cstime;/* Cumulative system time */
91         elf_gregset_t pr_reg;   /* GP registers */
92         int pr_fpvalid;         /* True if math co-processor being used.  */
93 };
94
95 #define elf_prpsinfo elf_prpsinfo32
96 struct elf_prpsinfo32
97 {
98         char    pr_state;       /* numeric process state */
99         char    pr_sname;       /* char for pr_state */
100         char    pr_zomb;        /* zombie */
101         char    pr_nice;        /* nice val */
102         unsigned int pr_flag;   /* flags */
103         __kernel_uid_t  pr_uid;
104         __kernel_gid_t  pr_gid;
105         pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
106         /* Lots missing */
107         char    pr_fname[16];   /* filename of executable */
108         char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
109 };
110
111 #define elf_caddr_t     u32
112 #define init_elf_binfmt init_elf32_binfmt
113
114 #define jiffies_to_timeval jiffies_to_compat_timeval
115 static inline void
116 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
117 {
118         /*
119          * Convert jiffies to nanoseconds and separate with
120          * one divide.
121          */
122         u64 nsec = (u64)jiffies * TICK_NSEC;
123         u32 rem;
124         value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
125         value->tv_usec = rem / NSEC_PER_USEC;
126 }
127
128 void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
129 {
130         int i;
131
132         for (i = 0; i < MIPS32_EF_R0; i++)
133                 grp[i] = 0;
134         grp[MIPS32_EF_R0] = 0;
135         for (i = 1; i <= 31; i++)
136                 grp[MIPS32_EF_R0 + i] = (elf_greg_t) regs->regs[i];
137         grp[MIPS32_EF_R26] = 0;
138         grp[MIPS32_EF_R27] = 0;
139         grp[MIPS32_EF_LO] = (elf_greg_t) regs->lo;
140         grp[MIPS32_EF_HI] = (elf_greg_t) regs->hi;
141         grp[MIPS32_EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
142         grp[MIPS32_EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
143         grp[MIPS32_EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
144         grp[MIPS32_EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
145 #ifdef MIPS32_EF_UNUSED0
146         grp[MIPS32_EF_UNUSED0] = 0;
147 #endif
148 }
149
150 MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");
151 MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
152
153 #undef MODULE_DESCRIPTION
154 #undef MODULE_AUTHOR
155
156 #undef TASK_SIZE
157 #define TASK_SIZE TASK_SIZE32
158
159 #undef cputime_to_timeval
160 #define cputime_to_timeval cputime_to_compat_timeval
161 static __inline__ void
162 cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
163 {
164         unsigned long jiffies = cputime_to_jiffies(cputime);
165
166         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
167         value->tv_sec = jiffies / HZ;
168 }
169
170 #include "../../../fs/binfmt_elf.c"