1/*
2 * binfmt_elf32.c: Support 32-bit Sparc ELF binaries on Ultra.
3 *
4 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller	(davem@redhat.com)
5 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek	(jj@ultra.linux.cz)
6 */
7
8#define ELF_ARCH		EM_SPARC
9#define ELF_CLASS		ELFCLASS32
10#define ELF_DATA		ELFDATA2MSB;
11
12/* For the most part we present code dumps in the format
13 * Solaris does.
14 */
15typedef unsigned int elf_greg_t;
16#define ELF_NGREG 38
17typedef elf_greg_t elf_gregset_t[ELF_NGREG];
18
19/* Format is:
20 * 	G0 --> G7
21 *	O0 --> O7
22 *	L0 --> L7
23 *	I0 --> I7
24 *	PSR, PC, nPC, Y, WIM, TBR
25 */
26#include <asm/psrcompat.h>
27#define ELF_CORE_COPY_REGS(__elf_regs, __pt_regs)	\
28do {	unsigned int *dest = &(__elf_regs[0]);		\
29	struct pt_regs *src = (__pt_regs);		\
30	unsigned int __user *sp;			\
31	int i;						\
32	for(i = 0; i < 16; i++)				\
33		dest[i] = (unsigned int) src->u_regs[i];\
34	/* Don't try this at home kids... */		\
35	sp = (unsigned int __user *) (src->u_regs[14] &	\
36		0x00000000fffffffc);			\
37	for(i = 0; i < 16; i++)				\
38		__get_user(dest[i+16], &sp[i]);		\
39	dest[32] = tstate_to_psr(src->tstate);		\
40	dest[33] = (unsigned int) src->tpc;		\
41	dest[34] = (unsigned int) src->tnpc;		\
42	dest[35] = src->y;				\
43	dest[36] = dest[37] = 0;		\
44} while(0);
45
46typedef struct {
47	union {
48		unsigned int	pr_regs[32];
49		unsigned long	pr_dregs[16];
50	} pr_fr;
51	unsigned int __unused;
52	unsigned int	pr_fsr;
53	unsigned char	pr_qcnt;
54	unsigned char	pr_q_entrysize;
55	unsigned char	pr_en;
56	unsigned int	pr_q[64];
57} elf_fpregset_t;
58
59/* UltraSparc extensions.  Still unused, but will be eventually.  */
60typedef struct {
61	unsigned int pr_type;
62	unsigned int pr_align;
63	union {
64		struct {
65			union {
66				unsigned int	pr_regs[32];
67				unsigned long	pr_dregs[16];
68				long double	pr_qregs[8];
69			} pr_xfr;
70		} pr_v8p;
71		unsigned int	pr_xfsr;
72		unsigned int	pr_fprs;
73		unsigned int	pr_xg[8];
74		unsigned int	pr_xo[8];
75		unsigned long	pr_tstate;
76		unsigned int	pr_filler[8];
77	} pr_un;
78} elf_xregset_t;
79
80#define elf_check_arch(x)	(((x)->e_machine == EM_SPARC) || ((x)->e_machine == EM_SPARC32PLUS))
81
82#define ELF_ET_DYN_BASE         0x70000000
83
84
85#include <asm/processor.h>
86#include <linux/module.h>
87#include <linux/elfcore.h>
88#include <linux/compat.h>
89
90#define elf_prstatus elf_prstatus32
91struct elf_prstatus32
92{
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 */
97	pid_t	pr_pid;
98	pid_t	pr_ppid;
99	pid_t	pr_pgrp;
100	pid_t	pr_sid;
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.  */
107};
108
109#define elf_prpsinfo elf_prpsinfo32
110struct elf_prpsinfo32
111{
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	u16	pr_uid;
118	u16	pr_gid;
119	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
120	/* Lots missing */
121	char	pr_fname[16];	/* filename of executable */
122	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
123};
124
125#include <linux/highuid.h>
126
127#undef NEW_TO_OLD_UID
128#undef NEW_TO_OLD_GID
129#define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
130#define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
131
132#include <linux/time.h>
133
134#undef cputime_to_timeval
135#define cputime_to_timeval cputime_to_compat_timeval
136static __inline__ void
137cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
138{
139	unsigned long jiffies = cputime_to_jiffies(cputime);
140	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
141	value->tv_sec = jiffies / HZ;
142}
143
144#undef start_thread
145#define start_thread start_thread32
146#define init_elf_binfmt init_elf32_binfmt
147
148MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit SparcLinux binaries on the Ultra");
149MODULE_AUTHOR("Eric Youngdale, David S. Miller, Jakub Jelinek");
150
151#undef MODULE_DESCRIPTION
152#undef MODULE_AUTHOR
153
154#include <asm/a.out.h>
155
156#undef TASK_SIZE
157#define TASK_SIZE STACK_TOP32
158
159#include "../../../fs/binfmt_elf.c"
160