1/*
  2 * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
  3 *
  4 * Copyright (C) 2000 John Marvin
  5 * Copyright (C) 2000 Hewlett Packard Co.
  6 *
  7 * Heavily inspired from various other efforts to do the same thing
  8 * (ia64,sparc64/mips64)
  9 */
 10
 11/* Make sure include/asm-parisc/elf.h does the right thing */
 12
 13#define ELF_CLASS	ELFCLASS32
 14
 15#define ELF_CORE_COPY_REGS(dst, pt)	\
 16	memset(dst, 0, sizeof(dst));	/* don't leak any "random" bits */ \
 17	{	int i; \
 18		for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
 19		for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
 20	} \
 21	dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
 22	dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
 23	dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
 24	dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
 25	dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
 26	dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
 27	dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
 28	dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
 29	dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
 30	dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
 31	dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
 32	dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);
 33
 34
 35typedef unsigned int elf_greg_t;
 36
 37#include <linux/spinlock.h>
 38#include <asm/processor.h>
 39#include <linux/module.h>
 40#include <linux/elfcore.h>
 41#include <linux/compat.h>		/* struct compat_timeval */
 42
 43#define elf_prstatus elf_prstatus32
 44struct elf_prstatus32
 45{
 46	struct elf_siginfo pr_info;	/* Info associated with signal */
 47	short	pr_cursig;		/* Current signal */
 48	unsigned int pr_sigpend;	/* Set of pending signals */
 49	unsigned int pr_sighold;	/* Set of held signals */
 50	pid_t	pr_pid;
 51	pid_t	pr_ppid;
 52	pid_t	pr_pgrp;
 53	pid_t	pr_sid;
 54	struct compat_timeval pr_utime;		/* User time */
 55	struct compat_timeval pr_stime;		/* System time */
 56	struct compat_timeval pr_cutime;	/* Cumulative user time */
 57	struct compat_timeval pr_cstime;	/* Cumulative system time */
 58	elf_gregset_t pr_reg;	/* GP registers */
 59	int pr_fpvalid;		/* True if math co-processor being used.  */
 60};
 61
 62#define elf_prpsinfo elf_prpsinfo32
 63struct elf_prpsinfo32
 64{
 65	char	pr_state;	/* numeric process state */
 66	char	pr_sname;	/* char for pr_state */
 67	char	pr_zomb;	/* zombie */
 68	char	pr_nice;	/* nice val */
 69	unsigned int pr_flag;	/* flags */
 70	u16	pr_uid;
 71	u16	pr_gid;
 72	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
 73	/* Lots missing */
 74	char	pr_fname[16];	/* filename of executable */
 75	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
 76};
 77
 78#define init_elf_binfmt init_elf32_binfmt
 79
 80#define ELF_PLATFORM  ("PARISC32\0")
 81
 82/*
 83 * We should probably use this macro to set a flag somewhere to indicate
 84 * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we
 85 * could set a processor dependent flag in the thread_struct.
 86 */
 87
 88#undef SET_PERSONALITY
 89#define SET_PERSONALITY(ex) \
 90	set_thread_flag(TIF_32BIT); \
 91	current->thread.map_base = DEFAULT_MAP_BASE32; \
 92	current->thread.task_size = DEFAULT_TASK_SIZE32 \
 93
 94#undef cputime_to_timeval
 95#define cputime_to_timeval cputime_to_compat_timeval
 96static __inline__ void
 97cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
 98{
 99	unsigned long jiffies = cputime_to_jiffies(cputime);
100	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
101	value->tv_sec = jiffies / HZ;
102}
103
104#include "../../../fs/binfmt_elf.c"