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#define SET_PERSONALITY(ex, ibcs2) \
89	set_thread_flag(TIF_32BIT); \
90	current->thread.map_base = DEFAULT_MAP_BASE32; \
91	current->thread.task_size = DEFAULT_TASK_SIZE32 \
92
93#undef cputime_to_timeval
94#define cputime_to_timeval cputime_to_compat_timeval
95static __inline__ void
96cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
97{
98	unsigned long jiffies = cputime_to_jiffies(cputime);
99	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
100	value->tv_sec = jiffies / HZ;
101}
102
103#include "../../../fs/binfmt_elf.c"
104