2 * Support for 32-bit Linux for S390 ELF binaries.
4 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
5 * Author(s): Gerhard Tonn (ton@de.ibm.com)
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 __ASMS390_ELF_H
14 #include <linux/time.h>
17 * These are used to set parameters in the core dumps.
19 #define ELF_CLASS ELFCLASS32
20 #define ELF_DATA ELFDATA2MSB
21 #define ELF_ARCH EM_S390
24 * This is used to ensure we don't load something for the wrong architecture.
26 #define elf_check_arch(x) \
27 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
28 && (x)->e_ident[EI_CLASS] == ELF_CLASS)
30 /* ELF register definitions */
35 #define TASK31_SIZE (0x80000000UL)
37 #define TASK_SIZE TASK31_SIZE
39 /* For SVR4/S390 the function pointer to be registered with `atexit` is
41 #define ELF_PLAT_INIT(_r, load_addr) \
46 #define USE_ELF_CORE_DUMP
47 #define ELF_EXEC_PAGESIZE 4096
49 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
50 use of this is to invoke "./ld.so someprog" to test out a new version of
51 the loader. We need to make sure that it is out of the way of the program
52 that it will "exec", and that there is sufficient room for the brk. */
54 #define ELF_ET_DYN_BASE (TASK31_SIZE / 3 * 2)
56 /* Wow, the "main" arch needs arch dependent functions too.. :) */
58 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
59 now struct_user_regs, they are different) */
61 #define ELF_CORE_COPY_REGS(pr_reg, regs) dump_regs32(regs, &pr_reg);
64 /* This yields a mask that user programs can use to figure out what
65 instruction set this CPU supports. */
69 /* This yields a string that ld.so will use to load implementation
70 specific libraries for optimization. This is more specific in
71 intent than poking at uname or /proc/cpuinfo.
73 For the moment, we have only optimizations for the Intel generations,
74 but that could change... */
76 #define ELF_PLATFORM (NULL)
78 #define SET_PERSONALITY(ex, ibcs2) \
81 set_personality(PER_SVR4); \
82 else if (current->personality != PER_LINUX32) \
83 set_personality(PER_LINUX); \
84 set_thread_flag(TIF_31BIT); \
87 #include "compat_linux.h"
89 typedef _s390_fp_regs32 elf_fpregset_t;
95 __u32 gprs[__NUM_GPRS];
96 __u32 acrs[__NUM_ACRS];
99 typedef s390_regs32 elf_gregset_t;
101 static inline int dump_regs32(struct pt_regs *ptregs, elf_gregset_t *regs)
105 memcpy(®s->psw.mask, &ptregs->psw.mask, 4);
106 memcpy(®s->psw.addr, &ptregs->psw.addr, 4);
107 for (i = 0; i < NUM_GPRS; i++)
108 regs->gprs[i] = ptregs->gprs[i];
109 regs->orig_gpr2 = ptregs->orig_gpr2;
113 #include <asm/processor.h>
114 #include <linux/module.h>
115 #include <linux/config.h>
116 #include <linux/elfcore.h>
117 #include <linux/binfmts.h>
118 #include <linux/compat.h>
120 int setup_arg_pages32(struct linux_binprm *bprm, int executable_stack);
122 #define elf_prstatus elf_prstatus32
123 struct elf_prstatus32
125 struct elf_siginfo pr_info; /* Info associated with signal */
126 short pr_cursig; /* Current signal */
127 u32 pr_sigpend; /* Set of pending signals */
128 u32 pr_sighold; /* Set of held signals */
133 struct compat_timeval pr_utime; /* User time */
134 struct compat_timeval pr_stime; /* System time */
135 struct compat_timeval pr_cutime; /* Cumulative user time */
136 struct compat_timeval pr_cstime; /* Cumulative system time */
137 elf_gregset_t pr_reg; /* GP registers */
138 int pr_fpvalid; /* True if math co-processor being used. */
141 #define elf_prpsinfo elf_prpsinfo32
142 struct elf_prpsinfo32
144 char pr_state; /* numeric process state */
145 char pr_sname; /* char for pr_state */
146 char pr_zomb; /* zombie */
147 char pr_nice; /* nice val */
148 u32 pr_flag; /* flags */
151 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
153 char pr_fname[16]; /* filename of executable */
154 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
157 #include <linux/highuid.h>
159 #undef NEW_TO_OLD_UID
160 #undef NEW_TO_OLD_GID
161 #define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
162 #define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
164 #define elf_addr_t u32
166 #define init_elf_binfmt init_elf32_binfmt
170 #define start_thread start_thread31
171 #define setup_arg_pages(bprm, exec) setup_arg_pages32(bprm, exec)
172 #define elf_map elf_map32
174 MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux for S390 binaries,"
175 " Copyright 2000 IBM Corporation");
176 MODULE_AUTHOR("Gerhard Tonn <ton@de.ibm.com>");
178 #undef MODULE_DESCRIPTION
181 #define jiffies_to_timeval jiffies_to_compat_timeval
182 static __inline__ void
183 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
185 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
186 value->tv_sec = jiffies / HZ;
189 #include "../../../fs/binfmt_elf.c"
192 elf_map32 (struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int prot, int type)
194 unsigned long map_addr;
197 addr = TASK_UNMAPPED_BASE;
199 down_write(¤t->mm->mmap_sem);
200 map_addr = do_mmap(filep, ELF_PAGESTART(addr),
201 eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr),
203 eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
204 up_write(¤t->mm->mmap_sem);