1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Support for o32 Linux/MIPS ELF binaries.
4 * Author: Ralf Baechle (ralf@linux-mips.org)
5 *
6 * Copyright (C) 1999, 2001 Ralf Baechle
7 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
8 *
9 * Heavily inspired by the 32-bit Sparc compat code which is
10 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
11 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
12 */
13
14 #define ELF_ARCH EM_MIPS
15 #define ELF_CLASS ELFCLASS32
16 #ifdef __MIPSEB__
17 #define ELF_DATA ELFDATA2MSB;
18 #else /* __MIPSEL__ */
19 #define ELF_DATA ELFDATA2LSB;
20 #endif
21
22 /* ELF register definitions */
23 #define ELF_NGREG 45
24 #define ELF_NFPREG 33
25
26 typedef unsigned int elf_greg_t;
27 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
28
29 typedef double elf_fpreg_t;
30 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
31
32 /*
33 * This is used to ensure we don't load something for the wrong architecture.
34 */
35 #define elf_check_arch elfo32_check_arch
36
37 #ifdef CONFIG_KVM_GUEST
38 #define TASK32_SIZE 0x3fff8000UL
39 #else
40 #define TASK32_SIZE 0x7fff8000UL
41 #endif
42 #undef ELF_ET_DYN_BASE
43 #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
44
45 #include <asm/processor.h>
46
47 #include <linux/elfcore.h>
48 #include <linux/compat.h>
49 #include <linux/math64.h>
50
51 #define elf_prstatus elf_prstatus32
52 struct elf_prstatus32
53 {
54 struct elf_siginfo pr_info; /* Info associated with signal */
55 short pr_cursig; /* Current signal */
56 unsigned int pr_sigpend; /* Set of pending signals */
57 unsigned int pr_sighold; /* Set of held signals */
58 pid_t pr_pid;
59 pid_t pr_ppid;
60 pid_t pr_pgrp;
61 pid_t pr_sid;
62 struct compat_timeval pr_utime; /* User time */
63 struct compat_timeval pr_stime; /* System time */
64 struct compat_timeval pr_cutime;/* Cumulative user time */
65 struct compat_timeval pr_cstime;/* Cumulative system time */
66 elf_gregset_t pr_reg; /* GP registers */
67 int pr_fpvalid; /* True if math co-processor being used. */
68 };
69
70 #define elf_prpsinfo elf_prpsinfo32
71 struct elf_prpsinfo32
72 {
73 char pr_state; /* numeric process state */
74 char pr_sname; /* char for pr_state */
75 char pr_zomb; /* zombie */
76 char pr_nice; /* nice val */
77 unsigned int pr_flag; /* flags */
78 __kernel_uid_t pr_uid;
79 __kernel_gid_t pr_gid;
80 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
81 /* Lots missing */
82 char pr_fname[16]; /* filename of executable */
83 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
84 };
85
86 #define elf_caddr_t u32
87 #define init_elf_binfmt init_elf32_binfmt
88
89 #define jiffies_to_timeval jiffies_to_compat_timeval
90 static inline void
91 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
92 {
93 /*
94 * Convert jiffies to nanoseconds and separate with
95 * one divide.
96 */
97 u64 nsec = (u64)jiffies * TICK_NSEC;
98 u32 rem;
99 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
100 value->tv_usec = rem / NSEC_PER_USEC;
101 }
102
103 #undef TASK_SIZE
104 #define TASK_SIZE TASK_SIZE32
105
106 #undef ns_to_timeval
107 #define ns_to_timeval ns_to_compat_timeval
108
109 #include "../../../fs/binfmt_elf.c"
110
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