1*cf84ac9aSAndroid Build Coastguard Worker /*
2*cf84ac9aSAndroid Build Coastguard Worker * Check decoding of s390_guarded_storage syscall.
3*cf84ac9aSAndroid Build Coastguard Worker *
4*cf84ac9aSAndroid Build Coastguard Worker * Copyright (c) 2018 The strace developers.
5*cf84ac9aSAndroid Build Coastguard Worker * All rights reserved.
6*cf84ac9aSAndroid Build Coastguard Worker *
7*cf84ac9aSAndroid Build Coastguard Worker * Redistribution and use in source and binary forms, with or without
8*cf84ac9aSAndroid Build Coastguard Worker * modification, are permitted provided that the following conditions
9*cf84ac9aSAndroid Build Coastguard Worker * are met:
10*cf84ac9aSAndroid Build Coastguard Worker * 1. Redistributions of source code must retain the above copyright
11*cf84ac9aSAndroid Build Coastguard Worker * notice, this list of conditions and the following disclaimer.
12*cf84ac9aSAndroid Build Coastguard Worker * 2. Redistributions in binary form must reproduce the above copyright
13*cf84ac9aSAndroid Build Coastguard Worker * notice, this list of conditions and the following disclaimer in the
14*cf84ac9aSAndroid Build Coastguard Worker * documentation and/or other materials provided with the distribution.
15*cf84ac9aSAndroid Build Coastguard Worker * 3. The name of the author may not be used to endorse or promote products
16*cf84ac9aSAndroid Build Coastguard Worker * derived from this software without specific prior written permission.
17*cf84ac9aSAndroid Build Coastguard Worker *
18*cf84ac9aSAndroid Build Coastguard Worker * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19*cf84ac9aSAndroid Build Coastguard Worker * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20*cf84ac9aSAndroid Build Coastguard Worker * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21*cf84ac9aSAndroid Build Coastguard Worker * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22*cf84ac9aSAndroid Build Coastguard Worker * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23*cf84ac9aSAndroid Build Coastguard Worker * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24*cf84ac9aSAndroid Build Coastguard Worker * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25*cf84ac9aSAndroid Build Coastguard Worker * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26*cf84ac9aSAndroid Build Coastguard Worker * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27*cf84ac9aSAndroid Build Coastguard Worker * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*cf84ac9aSAndroid Build Coastguard Worker */
29*cf84ac9aSAndroid Build Coastguard Worker
30*cf84ac9aSAndroid Build Coastguard Worker #include "tests.h"
31*cf84ac9aSAndroid Build Coastguard Worker #include <asm/unistd.h>
32*cf84ac9aSAndroid Build Coastguard Worker
33*cf84ac9aSAndroid Build Coastguard Worker #if defined __NR_s390_guarded_storage && defined HAVE_ASM_GUARDED_STORAGE_H
34*cf84ac9aSAndroid Build Coastguard Worker
35*cf84ac9aSAndroid Build Coastguard Worker # include <inttypes.h>
36*cf84ac9aSAndroid Build Coastguard Worker # include <stdint.h>
37*cf84ac9aSAndroid Build Coastguard Worker # include <stdio.h>
38*cf84ac9aSAndroid Build Coastguard Worker # include <unistd.h>
39*cf84ac9aSAndroid Build Coastguard Worker
40*cf84ac9aSAndroid Build Coastguard Worker # include <asm/guarded_storage.h>
41*cf84ac9aSAndroid Build Coastguard Worker
42*cf84ac9aSAndroid Build Coastguard Worker # ifndef VERBOSE
43*cf84ac9aSAndroid Build Coastguard Worker # define VERBOSE 0
44*cf84ac9aSAndroid Build Coastguard Worker # endif
45*cf84ac9aSAndroid Build Coastguard Worker
46*cf84ac9aSAndroid Build Coastguard Worker static void
gs_no_arg(kernel_ulong_t val,const char * val_str)47*cf84ac9aSAndroid Build Coastguard Worker gs_no_arg(kernel_ulong_t val, const char *val_str)
48*cf84ac9aSAndroid Build Coastguard Worker {
49*cf84ac9aSAndroid Build Coastguard Worker static const kernel_ulong_t bogus_addr =
50*cf84ac9aSAndroid Build Coastguard Worker (kernel_ulong_t) 0xcaffeedadeadbed5ULL;
51*cf84ac9aSAndroid Build Coastguard Worker static const kernel_ulong_t bogus_cmd_mask =
52*cf84ac9aSAndroid Build Coastguard Worker (kernel_ulong_t) 0xbadc0ded00000000ULL;
53*cf84ac9aSAndroid Build Coastguard Worker long rc;
54*cf84ac9aSAndroid Build Coastguard Worker
55*cf84ac9aSAndroid Build Coastguard Worker rc = syscall(__NR_s390_guarded_storage, val | bogus_cmd_mask,
56*cf84ac9aSAndroid Build Coastguard Worker bogus_addr);
57*cf84ac9aSAndroid Build Coastguard Worker printf("s390_guarded_storage(%s) = %s\n", val_str, sprintrc(rc));
58*cf84ac9aSAndroid Build Coastguard Worker }
59*cf84ac9aSAndroid Build Coastguard Worker
60*cf84ac9aSAndroid Build Coastguard Worker static void
gs_print_epl(uint64_t addr,bool valid,const char * str)61*cf84ac9aSAndroid Build Coastguard Worker gs_print_epl(uint64_t addr, bool valid, const char *str)
62*cf84ac9aSAndroid Build Coastguard Worker {
63*cf84ac9aSAndroid Build Coastguard Worker if (!valid) {
64*cf84ac9aSAndroid Build Coastguard Worker if (str)
65*cf84ac9aSAndroid Build Coastguard Worker printf("%s", str);
66*cf84ac9aSAndroid Build Coastguard Worker else
67*cf84ac9aSAndroid Build Coastguard Worker printf("%#" PRIx64, addr);
68*cf84ac9aSAndroid Build Coastguard Worker
69*cf84ac9aSAndroid Build Coastguard Worker return;
70*cf84ac9aSAndroid Build Coastguard Worker }
71*cf84ac9aSAndroid Build Coastguard Worker
72*cf84ac9aSAndroid Build Coastguard Worker struct gs_epl *gsepl = (struct gs_epl *) (uintptr_t) addr;
73*cf84ac9aSAndroid Build Coastguard Worker
74*cf84ac9aSAndroid Build Coastguard Worker printf("[{");
75*cf84ac9aSAndroid Build Coastguard Worker
76*cf84ac9aSAndroid Build Coastguard Worker # if VERBOSE
77*cf84ac9aSAndroid Build Coastguard Worker if (gsepl->pad1)
78*cf84ac9aSAndroid Build Coastguard Worker printf("pad1=%#02x, ", gsepl->pad1);
79*cf84ac9aSAndroid Build Coastguard Worker
80*cf84ac9aSAndroid Build Coastguard Worker printf("gs_eam=%#02x /* extended addressing mode: %u, "
81*cf84ac9aSAndroid Build Coastguard Worker "basic addressing mode: %u */"
82*cf84ac9aSAndroid Build Coastguard Worker ", gs_eci=%#02x /* CPU in TX: %u, CPU in CX: %u, "
83*cf84ac9aSAndroid Build Coastguard Worker "instruction: %s */"
84*cf84ac9aSAndroid Build Coastguard Worker ", gs_eai=%#02x /* DAT: %u, address space indication: %u, "
85*cf84ac9aSAndroid Build Coastguard Worker "AR number: %u */, ",
86*cf84ac9aSAndroid Build Coastguard Worker gsepl->gs_eam, gsepl->e, gsepl->b,
87*cf84ac9aSAndroid Build Coastguard Worker gsepl->gs_eci, gsepl->tx, gsepl->cx,
88*cf84ac9aSAndroid Build Coastguard Worker gsepl->in ? "LLGFGS": "LGG",
89*cf84ac9aSAndroid Build Coastguard Worker gsepl->gs_eai, gsepl->t, gsepl->as, gsepl->ar);
90*cf84ac9aSAndroid Build Coastguard Worker
91*cf84ac9aSAndroid Build Coastguard Worker if (gsepl->pad2)
92*cf84ac9aSAndroid Build Coastguard Worker printf("pad2=%#08x, ", gsepl->pad2);
93*cf84ac9aSAndroid Build Coastguard Worker # endif /* VERBOSE */
94*cf84ac9aSAndroid Build Coastguard Worker
95*cf84ac9aSAndroid Build Coastguard Worker printf("gs_eha=%#llx, ", (unsigned long long) gsepl->gs_eha);
96*cf84ac9aSAndroid Build Coastguard Worker
97*cf84ac9aSAndroid Build Coastguard Worker # if VERBOSE
98*cf84ac9aSAndroid Build Coastguard Worker printf("gs_eia=%#llx, gs_eoa=%#llx, gs_eir=%#llx, gs_era=%#llx",
99*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gsepl->gs_eia,
100*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gsepl->gs_eoa,
101*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gsepl->gs_eir,
102*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gsepl->gs_era);
103*cf84ac9aSAndroid Build Coastguard Worker # else /* !VERBOSE */
104*cf84ac9aSAndroid Build Coastguard Worker printf("...");
105*cf84ac9aSAndroid Build Coastguard Worker # endif /* VERBOSE */
106*cf84ac9aSAndroid Build Coastguard Worker
107*cf84ac9aSAndroid Build Coastguard Worker printf("}]");
108*cf84ac9aSAndroid Build Coastguard Worker }
109*cf84ac9aSAndroid Build Coastguard Worker
110*cf84ac9aSAndroid Build Coastguard Worker static void
gs_set_cb(kernel_ulong_t addr,bool valid,bool epl_valid,const char * bc_str,const char * epl_str)111*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb(kernel_ulong_t addr, bool valid, bool epl_valid,
112*cf84ac9aSAndroid Build Coastguard Worker const char *bc_str, const char *epl_str)
113*cf84ac9aSAndroid Build Coastguard Worker {
114*cf84ac9aSAndroid Build Coastguard Worker static const kernel_ulong_t bogus_cmd_mask =
115*cf84ac9aSAndroid Build Coastguard Worker (kernel_ulong_t) 0xda7a105700000000ULL;
116*cf84ac9aSAndroid Build Coastguard Worker
117*cf84ac9aSAndroid Build Coastguard Worker long rc;
118*cf84ac9aSAndroid Build Coastguard Worker
119*cf84ac9aSAndroid Build Coastguard Worker printf("s390_guarded_storage(GS_SET_BC_CB, ");
120*cf84ac9aSAndroid Build Coastguard Worker
121*cf84ac9aSAndroid Build Coastguard Worker if (valid) {
122*cf84ac9aSAndroid Build Coastguard Worker struct gs_cb *gscb = (struct gs_cb *) (uintptr_t) addr;
123*cf84ac9aSAndroid Build Coastguard Worker
124*cf84ac9aSAndroid Build Coastguard Worker printf("{");
125*cf84ac9aSAndroid Build Coastguard Worker
126*cf84ac9aSAndroid Build Coastguard Worker if (gscb->reserved)
127*cf84ac9aSAndroid Build Coastguard Worker printf("reserved=%#016llx, ",
128*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gscb->reserved);
129*cf84ac9aSAndroid Build Coastguard Worker
130*cf84ac9aSAndroid Build Coastguard Worker printf("gsd=%#16llx",
131*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gscb->gsd);
132*cf84ac9aSAndroid Build Coastguard Worker # if VERBOSE
133*cf84ac9aSAndroid Build Coastguard Worker printf(" /* GS origin: ");
134*cf84ac9aSAndroid Build Coastguard Worker
135*cf84ac9aSAndroid Build Coastguard Worker unsigned int gsc = gscb->gsd & 0x3F;
136*cf84ac9aSAndroid Build Coastguard Worker unsigned int gls = (gscb->gsd >> 8) & 7;
137*cf84ac9aSAndroid Build Coastguard Worker bool gsc_valid = gsc >= 25 && gsc <= 56;
138*cf84ac9aSAndroid Build Coastguard Worker
139*cf84ac9aSAndroid Build Coastguard Worker if (gsc_valid) {
140*cf84ac9aSAndroid Build Coastguard Worker uint64_t gls = gscb->gsd >> gsc;
141*cf84ac9aSAndroid Build Coastguard Worker int field_size = 2 + (67 - gsc) / 4;
142*cf84ac9aSAndroid Build Coastguard Worker
143*cf84ac9aSAndroid Build Coastguard Worker printf("%#0*" PRIx64, field_size, gls);
144*cf84ac9aSAndroid Build Coastguard Worker } else {
145*cf84ac9aSAndroid Build Coastguard Worker printf("[invalid]");
146*cf84ac9aSAndroid Build Coastguard Worker }
147*cf84ac9aSAndroid Build Coastguard Worker
148*cf84ac9aSAndroid Build Coastguard Worker printf(", guard load shift: %u, GS characteristic: %u */",
149*cf84ac9aSAndroid Build Coastguard Worker gls, gsc);
150*cf84ac9aSAndroid Build Coastguard Worker # endif /* VERBOSE */
151*cf84ac9aSAndroid Build Coastguard Worker
152*cf84ac9aSAndroid Build Coastguard Worker printf(", gssm=%#016llx, gs_epl_a=",
153*cf84ac9aSAndroid Build Coastguard Worker (unsigned long long) gscb->gssm);
154*cf84ac9aSAndroid Build Coastguard Worker
155*cf84ac9aSAndroid Build Coastguard Worker gs_print_epl(gscb->gs_epl_a, epl_valid, epl_str);
156*cf84ac9aSAndroid Build Coastguard Worker
157*cf84ac9aSAndroid Build Coastguard Worker printf("}");
158*cf84ac9aSAndroid Build Coastguard Worker } else {
159*cf84ac9aSAndroid Build Coastguard Worker if (bc_str)
160*cf84ac9aSAndroid Build Coastguard Worker printf("%s", bc_str);
161*cf84ac9aSAndroid Build Coastguard Worker else
162*cf84ac9aSAndroid Build Coastguard Worker printf("%#llx", (unsigned long long) addr);
163*cf84ac9aSAndroid Build Coastguard Worker }
164*cf84ac9aSAndroid Build Coastguard Worker
165*cf84ac9aSAndroid Build Coastguard Worker rc = syscall(__NR_s390_guarded_storage,
166*cf84ac9aSAndroid Build Coastguard Worker GS_SET_BC_CB | bogus_cmd_mask, addr);
167*cf84ac9aSAndroid Build Coastguard Worker printf(") = %s\n", sprintrc(rc));
168*cf84ac9aSAndroid Build Coastguard Worker }
169*cf84ac9aSAndroid Build Coastguard Worker
170*cf84ac9aSAndroid Build Coastguard Worker int
main(void)171*cf84ac9aSAndroid Build Coastguard Worker main(void)
172*cf84ac9aSAndroid Build Coastguard Worker {
173*cf84ac9aSAndroid Build Coastguard Worker static const kernel_ulong_t bogus_cmd =
174*cf84ac9aSAndroid Build Coastguard Worker (kernel_ulong_t) 0xdeafbeefdeadc0deULL;
175*cf84ac9aSAndroid Build Coastguard Worker static const kernel_ulong_t bogus_addr =
176*cf84ac9aSAndroid Build Coastguard Worker (kernel_ulong_t) 0xfacefeedac0ffeedULL;
177*cf84ac9aSAndroid Build Coastguard Worker
178*cf84ac9aSAndroid Build Coastguard Worker TAIL_ALLOC_OBJECT_CONST_PTR(struct gs_cb, gscb);
179*cf84ac9aSAndroid Build Coastguard Worker TAIL_ALLOC_OBJECT_CONST_PTR(struct gs_epl, gsepl);
180*cf84ac9aSAndroid Build Coastguard Worker
181*cf84ac9aSAndroid Build Coastguard Worker long rc;
182*cf84ac9aSAndroid Build Coastguard Worker
183*cf84ac9aSAndroid Build Coastguard Worker rc = syscall(__NR_s390_guarded_storage, 5, 0);
184*cf84ac9aSAndroid Build Coastguard Worker printf("s390_guarded_storage(0x5 /* GS_??? */, NULL) = %s\n",
185*cf84ac9aSAndroid Build Coastguard Worker sprintrc(rc));
186*cf84ac9aSAndroid Build Coastguard Worker
187*cf84ac9aSAndroid Build Coastguard Worker rc = syscall(__NR_s390_guarded_storage, bogus_cmd, bogus_addr);
188*cf84ac9aSAndroid Build Coastguard Worker printf("s390_guarded_storage(%#x /* GS_??? */, %#lx) = %s\n",
189*cf84ac9aSAndroid Build Coastguard Worker (unsigned) bogus_cmd, (unsigned long) bogus_addr, sprintrc(rc));
190*cf84ac9aSAndroid Build Coastguard Worker
191*cf84ac9aSAndroid Build Coastguard Worker gs_no_arg(ARG_STR(GS_BROADCAST));
192*cf84ac9aSAndroid Build Coastguard Worker gs_no_arg(ARG_STR(GS_CLEAR_BC_CB));
193*cf84ac9aSAndroid Build Coastguard Worker gs_no_arg(ARG_STR(GS_DISABLE));
194*cf84ac9aSAndroid Build Coastguard Worker gs_no_arg(ARG_STR(GS_ENABLE));
195*cf84ac9aSAndroid Build Coastguard Worker
196*cf84ac9aSAndroid Build Coastguard Worker fill_memory(gscb, sizeof(*gscb));
197*cf84ac9aSAndroid Build Coastguard Worker fill_memory_ex(gsepl, sizeof(*gsepl), 0xA5, 0x5A);
198*cf84ac9aSAndroid Build Coastguard Worker
199*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb(0, false, false, "NULL", NULL);
200*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb((uintptr_t) (gscb + 1), false, false, NULL, NULL);
201*cf84ac9aSAndroid Build Coastguard Worker
202*cf84ac9aSAndroid Build Coastguard Worker gscb->gs_epl_a = 0;
203*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb((uintptr_t) gscb, true, false, NULL, "NULL");
204*cf84ac9aSAndroid Build Coastguard Worker
205*cf84ac9aSAndroid Build Coastguard Worker fill_memory_ex(gscb, sizeof(*gscb), 0x5A, 0xA5);
206*cf84ac9aSAndroid Build Coastguard Worker gscb->gs_epl_a = (uintptr_t) (gsepl + 1) |
207*cf84ac9aSAndroid Build Coastguard Worker (sizeof(kernel_ulong_t) < sizeof(uint64_t) ?
208*cf84ac9aSAndroid Build Coastguard Worker 0xc0debad000000000ULL : 0);
209*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb((uintptr_t) gscb, true, false, NULL, NULL);
210*cf84ac9aSAndroid Build Coastguard Worker
211*cf84ac9aSAndroid Build Coastguard Worker fill_memory_ex(gscb, sizeof(*gscb), 0xA7, 0xA5);
212*cf84ac9aSAndroid Build Coastguard Worker gscb->gs_epl_a = (uintptr_t) gsepl;
213*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb((uintptr_t) gscb, true, true, NULL, NULL);
214*cf84ac9aSAndroid Build Coastguard Worker
215*cf84ac9aSAndroid Build Coastguard Worker fill_memory_ex(gscb, sizeof(*gscb), 0x55, 0xAA);
216*cf84ac9aSAndroid Build Coastguard Worker fill_memory_ex(gsepl, sizeof(*gsepl), 0x5A, 0xA5);
217*cf84ac9aSAndroid Build Coastguard Worker gscb->gs_epl_a = (uintptr_t) gsepl;
218*cf84ac9aSAndroid Build Coastguard Worker gs_set_cb((uintptr_t) gscb, true, true, NULL, NULL);
219*cf84ac9aSAndroid Build Coastguard Worker
220*cf84ac9aSAndroid Build Coastguard Worker puts("+++ exited with 0 +++");
221*cf84ac9aSAndroid Build Coastguard Worker return 0;
222*cf84ac9aSAndroid Build Coastguard Worker }
223*cf84ac9aSAndroid Build Coastguard Worker
224*cf84ac9aSAndroid Build Coastguard Worker #else
225*cf84ac9aSAndroid Build Coastguard Worker
226*cf84ac9aSAndroid Build Coastguard Worker SKIP_MAIN_UNDEFINED("__NR_s390_guarded_storage && HAVE_ASM_GUARDED_STORAGE_H")
227*cf84ac9aSAndroid Build Coastguard Worker
228*cf84ac9aSAndroid Build Coastguard Worker #endif
229