aboutsummaryrefslogtreecommitdiff
path: root/openssl/crypto/sparcv9cap.c
blob: d9f986f6b9684c804ab716302f8a1b2dc4935621 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <sys/time.h>
#include <openssl/bn.h>

#define SPARCV9_TICK_PRIVILEGED (1<<0)
#define SPARCV9_PREFER_FPU      (1<<1)
#define SPARCV9_VIS1            (1<<2)
#define SPARCV9_VIS2            (1<<3) /* reserved */
#define SPARCV9_FMADD           (1<<4) /* reserved for SPARC64 V */

static int OPENSSL_sparcv9cap_P = SPARCV9_TICK_PRIVILEGED;

int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                const BN_ULONG *np, const BN_ULONG *n0, int num)
{
    int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                        const BN_ULONG *np, const BN_ULONG *n0, int num);
    int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                        const BN_ULONG *np, const BN_ULONG *n0, int num);

    if (num >= 8 && !(num & 1) &&
        (OPENSSL_sparcv9cap_P & (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) ==
        (SPARCV9_PREFER_FPU | SPARCV9_VIS1))
        return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
    else
        return bn_mul_mont_int(rp, ap, bp, np, n0, num);
}

unsigned long _sparcv9_rdtick(void);
void _sparcv9_vis1_probe(void);
unsigned long _sparcv9_vis1_instrument(void);
void _sparcv9_vis2_probe(void);
void _sparcv9_fmadd_probe(void);

unsigned long OPENSSL_rdtsc(void)
{
    if (OPENSSL_sparcv9cap_P & SPARCV9_TICK_PRIVILEGED)
#if defined(__sun) && defined(__SVR4)
        return gethrtime();
#else
        return 0;
#endif
    else
        return _sparcv9_rdtick();
}

#if 0 && defined(__sun) && defined(__SVR4)
/*
 * This code path is disabled, because of incompatibility of libdevinfo.so.1
 * and libmalloc.so.1 (see below for details)
 */
# include <malloc.h>
# include <dlfcn.h>
# include <libdevinfo.h>
# include <sys/systeminfo.h>

typedef di_node_t(*di_init_t) (const char *, uint_t);
typedef void (*di_fini_t) (di_node_t);
typedef char *(*di_node_name_t) (di_node_t);
typedef int (*di_walk_node_t) (di_node_t, uint_t, di_node_name_t,
                               int (*)(di_node_t, di_node_name_t));

# define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))

static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
{
    char *name = (*di_node_name) (node);

    /* This is expected to catch all UltraSPARC flavors prior T1 */
    if (!strcmp(name, "SUNW,UltraSPARC") ||
        /* covers II,III,IV */
        !strncmp(name, "SUNW,UltraSPARC-I", 17)) {
        OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU | SPARCV9_VIS1;

        /* %tick is privileged only on UltraSPARC-I/II, but not IIe */
        if (name[14] != '\0' && name[17] != '\0' && name[18] != '\0')
            OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;

        return DI_WALK_TERMINATE;
    }
    /* This is expected to catch remaining UltraSPARCs, such as T1 */
    else if (!strncmp(name, "SUNW,UltraSPARC", 15)) {
        OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;

        return DI_WALK_TERMINATE;
    }

    return DI_WALK_CONTINUE;
}

void OPENSSL_cpuid_setup(void)
{
    void *h;
    char *e, si[256];
    static int trigger = 0;

    if (trigger)
        return;
    trigger = 1;

    if ((e = getenv("OPENSSL_sparcv9cap"))) {
        OPENSSL_sparcv9cap_P = strtoul(e, NULL, 0);
        return;
    }

    if (sysinfo(SI_MACHINE, si, sizeof(si)) > 0) {
        if (strcmp(si, "sun4v"))
            /* FPU is preferred for all CPUs, but US-T1/2 */
            OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU;
    }

    if (sysinfo(SI_ISALIST, si, sizeof(si)) > 0) {
        if (strstr(si, "+vis"))
            OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
        if (strstr(si, "+vis2")) {
            OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
            OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
            return;
        }
    }
# ifdef M_KEEP
    /*
     * Solaris libdevinfo.so.1 is effectively incomatible with
     * libmalloc.so.1. Specifically, if application is linked with
     * -lmalloc, it crashes upon startup with SIGSEGV in
     * free(3LIBMALLOC) called by di_fini. Prior call to
     * mallopt(M_KEEP,0) somehow helps... But not always...
     */
    if ((h = dlopen(NULL, RTLD_LAZY))) {
        union {
            void *p;
            int (*f) (int, int);
        } sym;
        if ((sym.p = dlsym(h, "mallopt")))
            (*sym.f) (M_KEEP, 0);
        dlclose(h);
    }
# endif
    if ((h = dlopen("libdevinfo.so.1", RTLD_LAZY)))
        do {
            di_init_t di_init;
            di_fini_t di_fini;
            di_walk_node_t di_walk_node;
            di_node_name_t di_node_name;
            di_node_t root_node;

            if (!DLLINK(h, di_init))
                break;
            if (!DLLINK(h, di_fini))
                break;
            if (!DLLINK(h, di_walk_node))
                break;
            if (!DLLINK(h, di_node_name))
                break;

            if ((root_node = (*di_init) ("/", DINFOSUBTREE)) != DI_NODE_NIL) {
                (*di_walk_node) (root_node, DI_WALK_SIBFIRST,
                                 di_node_name, walk_nodename);
                (*di_fini) (root_node);
            }
        } while (0);

    if (h)
        dlclose(h);
}

#else

static sigjmp_buf common_jmp;
static void common_handler(int sig)
{
    siglongjmp(common_jmp, sig);
}

void OPENSSL_cpuid_setup(void)
{
    char *e;
    struct sigaction common_act, ill_oact, bus_oact;
    sigset_t all_masked, oset;
    static int trigger = 0;

    if (trigger)
        return;
    trigger = 1;

    if ((e = getenv("OPENSSL_sparcv9cap"))) {
        OPENSSL_sparcv9cap_P = strtoul(e, NULL, 0);
        return;
    }

    /* Initial value, fits UltraSPARC-I&II... */
    OPENSSL_sparcv9cap_P = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED;

    sigfillset(&all_masked);
    sigdelset(&all_masked, SIGILL);
    sigdelset(&all_masked, SIGTRAP);
# ifdef SIGEMT
    sigdelset(&all_masked, SIGEMT);
# endif
    sigdelset(&all_masked, SIGFPE);
    sigdelset(&all_masked, SIGBUS);
    sigdelset(&all_masked, SIGSEGV);
    sigprocmask(SIG_SETMASK, &all_masked, &oset);

    memset(&common_act, 0, sizeof(common_act));
    common_act.sa_handler = common_handler;
    common_act.sa_mask = all_masked;

    sigaction(SIGILL, &common_act, &ill_oact);
    sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on
                                                * Linux] */

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_rdtick();
        OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
    }

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_vis1_probe();
        OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
        /* detect UltraSPARC-Tx, see sparccpud.S for details... */
        if (_sparcv9_vis1_instrument() >= 12)
            OPENSSL_sparcv9cap_P &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
        else {
            _sparcv9_vis2_probe();
            OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
        }
    }

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_fmadd_probe();
        OPENSSL_sparcv9cap_P |= SPARCV9_FMADD;
    }

    sigaction(SIGBUS, &bus_oact, NULL);
    sigaction(SIGILL, &ill_oact, NULL);

    sigprocmask(SIG_SETMASK, &oset, NULL);
}

#endif