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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
26typedef unsigned long elf_greg_t;
27typedef elf_greg_t elf_gregset_t[ELF_NGREG];
28
29typedef double elf_fpreg_t;
30typedef 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
47struct 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 old_timeval32 pr_utime; /* User time */
58 struct old_timeval32 pr_stime; /* System time */
59 struct old_timeval32 pr_cutime;/* Cumulative user time */
60 struct old_timeval32 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
66struct 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_old_timeval32
85static __inline__ void
86jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *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_old_timeval32
105
106#include "../../../fs/binfmt_elf.c"
1/*
2 * Support for n32 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
24typedef unsigned long elf_greg_t;
25typedef elf_greg_t elf_gregset_t[ELF_NGREG];
26
27typedef double elf_fpreg_t;
28typedef 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 ((__h->e_flags & EF_MIPS_ABI) != 0)) \
44 __res = 0; \
45 \
46 __res; \
47})
48
49#define TASK32_SIZE 0x7fff8000UL
50#undef ELF_ET_DYN_BASE
51#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
52
53#include <asm/processor.h>
54#include <linux/module.h>
55#include <linux/elfcore.h>
56#include <linux/compat.h>
57#include <linux/math64.h>
58
59#define elf_prstatus elf_prstatus32
60struct elf_prstatus32
61{
62 struct elf_siginfo pr_info; /* Info associated with signal */
63 short pr_cursig; /* Current signal */
64 unsigned int pr_sigpend; /* Set of pending signals */
65 unsigned int pr_sighold; /* Set of held signals */
66 pid_t pr_pid;
67 pid_t pr_ppid;
68 pid_t pr_pgrp;
69 pid_t pr_sid;
70 struct compat_timeval pr_utime; /* User time */
71 struct compat_timeval pr_stime; /* System time */
72 struct compat_timeval pr_cutime;/* Cumulative user time */
73 struct compat_timeval pr_cstime;/* Cumulative system time */
74 elf_gregset_t pr_reg; /* GP registers */
75 int pr_fpvalid; /* True if math co-processor being used. */
76};
77
78#define elf_prpsinfo elf_prpsinfo32
79struct elf_prpsinfo32
80{
81 char pr_state; /* numeric process state */
82 char pr_sname; /* char for pr_state */
83 char pr_zomb; /* zombie */
84 char pr_nice; /* nice val */
85 unsigned int pr_flag; /* flags */
86 __kernel_uid_t pr_uid;
87 __kernel_gid_t pr_gid;
88 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
89 /* Lots missing */
90 char pr_fname[16]; /* filename of executable */
91 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
92};
93
94#define elf_caddr_t u32
95#define init_elf_binfmt init_elfn32_binfmt
96
97#define jiffies_to_timeval jiffies_to_compat_timeval
98static __inline__ void
99jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
100{
101 /*
102 * Convert jiffies to nanoseconds and separate with
103 * one divide.
104 */
105 u64 nsec = (u64)jiffies * TICK_NSEC;
106 u32 rem;
107 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
108 value->tv_usec = rem / NSEC_PER_USEC;
109}
110
111#define ELF_CORE_EFLAGS EF_MIPS_ABI2
112
113MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries");
114MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
115
116#undef MODULE_DESCRIPTION
117#undef MODULE_AUTHOR
118
119#undef TASK_SIZE
120#define TASK_SIZE TASK_SIZE32
121
122#include "../../../fs/binfmt_elf.c"