1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Support for n32 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 long 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 elfn32_check_arch
36
37 #define TASK32_SIZE 0x7fff8000UL
38 #undef ELF_ET_DYN_BASE
39 #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
40
41 #include <asm/processor.h>
42 #include <linux/elfcore.h>
43 #include <linux/compat.h>
44 #include <linux/math64.h>
45
46 #define elf_prstatus elf_prstatus32
47 struct elf_prstatus32
48 {
49 struct elf_siginfo pr_info; /* Info associated with signal */
50 short pr_cursig; /* Current signal */
51 unsigned int pr_sigpend; /* Set of pending signals */
52 unsigned int pr_sighold; /* Set of held signals */
53 pid_t pr_pid;
54 pid_t pr_ppid;
55 pid_t pr_pgrp;
56 pid_t pr_sid;
57 struct compat_timeval pr_utime; /* User time */
58 struct compat_timeval pr_stime; /* System time */
59 struct compat_timeval pr_cutime;/* Cumulative user time */
60 struct compat_timeval pr_cstime;/* Cumulative system time */
61 elf_gregset_t pr_reg; /* GP registers */
62 int pr_fpvalid; /* True if math co-processor being used. */
63 };
64
65 #define elf_prpsinfo elf_prpsinfo32
66 struct elf_prpsinfo32
67 {
68 char pr_state; /* numeric process state */
69 char pr_sname; /* char for pr_state */
70 char pr_zomb; /* zombie */
71 char pr_nice; /* nice val */
72 unsigned int pr_flag; /* flags */
73 __kernel_uid_t pr_uid;
74 __kernel_gid_t pr_gid;
75 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
76 /* Lots missing */
77 char pr_fname[16]; /* filename of executable */
78 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
79 };
80
81 #define elf_caddr_t u32
82 #define init_elf_binfmt init_elfn32_binfmt
83
84 #define jiffies_to_timeval jiffies_to_compat_timeval
85 static __inline__ void
jiffies_to_compat_timeval(unsigned long jiffies,struct compat_timeval * value)86 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
87 {
88 /*
89 * Convert jiffies to nanoseconds and separate with
90 * one divide.
91 */
92 u64 nsec = (u64)jiffies * TICK_NSEC;
93 u32 rem;
94 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
95 value->tv_usec = rem / NSEC_PER_USEC;
96 }
97
98 #define ELF_CORE_EFLAGS EF_MIPS_ABI2
99
100 #undef TASK_SIZE
101 #define TASK_SIZE TASK_SIZE32
102
103 #undef ns_to_timeval
104 #define ns_to_timeval ns_to_compat_timeval
105
106 #include "../../../fs/binfmt_elf.c"
107