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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * Support for n32 Linux/MIPS ELF binaries.
Paul Gortmakerd9d54172016-08-21 15:58:13 -04004 * Author: Ralf Baechle (ralf@linux-mips.org)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
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)
Ralf Baechle70342282013-01-22 12:59:30 +010011 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
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 */
Maciej W. Rozyckic9babb12016-05-13 07:21:40 +010035#define elf_check_arch elfn32_check_arch
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37#define TASK32_SIZE 0x7fff8000UL
38#undef ELF_ET_DYN_BASE
Ralf Baechle70342282013-01-22 12:59:30 +010039#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41#include <asm/processor.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/elfcore.h>
43#include <linux/compat.h>
Roman Zippelf8bd2252008-05-01 04:34:31 -070044#include <linux/math64.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
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;
Arnd Bergmann9afc5ee2018-07-13 12:52:28 +020057 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 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 */
Ralf Baechle70342282013-01-22 12:59:30 +010078 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079};
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#define elf_caddr_t u32
82#define init_elf_binfmt init_elfn32_binfmt
83
Arnd Bergmann9afc5ee2018-07-13 12:52:28 +020084#define jiffies_to_timeval jiffies_to_old_timeval32
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static __inline__ void
Arnd Bergmann9afc5ee2018-07-13 12:52:28 +020086jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *value)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
88 /*
Joe Perches603e82e2008-02-03 16:54:53 +020089 * Convert jiffies to nanoseconds and separate with
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 * one divide.
91 */
Ralf Baechle42a3b4f2005-09-03 15:56:17 -070092 u64 nsec = (u64)jiffies * TICK_NSEC;
Roman Zippelf8bd2252008-05-01 04:34:31 -070093 u32 rem;
94 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
Atsushi Nemoto909fa642006-02-21 01:25:06 +090095 value->tv_usec = rem / NSEC_PER_USEC;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
98#define ELF_CORE_EFLAGS EF_MIPS_ABI2
99
Ralf Baechlec6237642005-01-26 02:22:22 +0000100#undef TASK_SIZE
101#define TASK_SIZE TASK_SIZE32
102
Frederic Weisbeckercd19c362017-01-31 04:09:27 +0100103#undef ns_to_timeval
Arnd Bergmann9afc5ee2018-07-13 12:52:28 +0200104#define ns_to_timeval ns_to_old_timeval32
Ralf Baechle7b741aa2013-05-29 00:48:10 +0200105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#include "../../../fs/binfmt_elf.c"