2 * Support for o32 Linux/MIPS ELF binaries.
4 * Copyright (C) 1999, 2001 Ralf Baechle
5 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
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)
12 #define ELF_ARCH EM_MIPS
13 #define ELF_CLASS ELFCLASS32
15 #define ELF_DATA ELFDATA2MSB;
16 #else /* __MIPSEL__ */
17 #define ELF_DATA ELFDATA2LSB;
20 /* ELF register definitions */
24 typedef unsigned int elf_greg_t;
25 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
27 typedef double elf_fpreg_t;
28 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
31 * In order to be sure that we don't attempt to execute an O32 binary which
32 * requires 64 bit FP (FR=1) on a system which does not support it we refuse
33 * to execute any binary which has bits specified by the following macro set
34 * in its ELF header flags.
36 #ifdef CONFIG_MIPS_O32_FP64_SUPPORT
37 # define __MIPS_O32_FP64_MUST_BE_ZERO 0
39 # define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64
43 * This is used to ensure we don't load something for the wrong architecture.
45 #define elf_check_arch(hdr) \
48 struct elfhdr *__h = (hdr); \
50 if (__h->e_machine != EM_MIPS) \
52 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
54 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \
56 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \
57 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \
59 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \
65 #ifdef CONFIG_KVM_GUEST
66 #define TASK32_SIZE 0x3fff8000UL
68 #define TASK32_SIZE 0x7fff8000UL
70 #undef ELF_ET_DYN_BASE
71 #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
73 #include <asm/processor.h>
75 /* These MUST be defined before elf.h gets included */
76 extern void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs);
77 #define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);
78 #define ELF_CORE_COPY_TASK_REGS(_tsk, _dest) \
81 elf32_core_copy_regs(*(_dest), task_pt_regs(_tsk)); \
85 #include <linux/module.h>
86 #include <linux/elfcore.h>
87 #include <linux/compat.h>
88 #include <linux/math64.h>
90 #define elf_prstatus elf_prstatus32
93 struct elf_siginfo pr_info; /* Info associated with signal */
94 short pr_cursig; /* Current signal */
95 unsigned int pr_sigpend; /* Set of pending signals */
96 unsigned int pr_sighold; /* Set of held signals */
101 struct compat_timeval pr_utime; /* User time */
102 struct compat_timeval pr_stime; /* System time */
103 struct compat_timeval pr_cutime;/* Cumulative user time */
104 struct compat_timeval pr_cstime;/* Cumulative system time */
105 elf_gregset_t pr_reg; /* GP registers */
106 int pr_fpvalid; /* True if math co-processor being used. */
109 #define elf_prpsinfo elf_prpsinfo32
110 struct elf_prpsinfo32
112 char pr_state; /* numeric process state */
113 char pr_sname; /* char for pr_state */
114 char pr_zomb; /* zombie */
115 char pr_nice; /* nice val */
116 unsigned int pr_flag; /* flags */
117 __kernel_uid_t pr_uid;
118 __kernel_gid_t pr_gid;
119 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
121 char pr_fname[16]; /* filename of executable */
122 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
125 #define elf_caddr_t u32
126 #define init_elf_binfmt init_elf32_binfmt
128 #define jiffies_to_timeval jiffies_to_compat_timeval
130 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
133 * Convert jiffies to nanoseconds and separate with
136 u64 nsec = (u64)jiffies * TICK_NSEC;
138 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
139 value->tv_usec = rem / NSEC_PER_USEC;
142 void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
146 for (i = 0; i < MIPS32_EF_R0; i++)
148 grp[MIPS32_EF_R0] = 0;
149 for (i = 1; i <= 31; i++)
150 grp[MIPS32_EF_R0 + i] = (elf_greg_t) regs->regs[i];
151 grp[MIPS32_EF_R26] = 0;
152 grp[MIPS32_EF_R27] = 0;
153 grp[MIPS32_EF_LO] = (elf_greg_t) regs->lo;
154 grp[MIPS32_EF_HI] = (elf_greg_t) regs->hi;
155 grp[MIPS32_EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
156 grp[MIPS32_EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
157 grp[MIPS32_EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
158 grp[MIPS32_EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
159 #ifdef MIPS32_EF_UNUSED0
160 grp[MIPS32_EF_UNUSED0] = 0;
164 MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");
165 MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
167 #undef MODULE_DESCRIPTION
171 #define TASK_SIZE TASK_SIZE32
173 #undef cputime_to_timeval
174 #define cputime_to_timeval cputime_to_compat_timeval
175 static __inline__ void
176 cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
178 unsigned long jiffies = cputime_to_jiffies(cputime);
180 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
181 value->tv_sec = jiffies / HZ;
184 #include "../../../fs/binfmt_elf.c"