Line data Source code
1 : #include "fd_vm_syscall.h"
2 : #include "../../runtime/program/fd_vote_program.h"
3 : #include "../../runtime/context/fd_exec_instr_ctx.h"
4 : #include "../../runtime/fd_system_ids.h"
5 : #include "fd_vm_syscall_macros.h"
6 :
7 : /* FIXME: In the original version of this code, there was an FD_TEST
8 : to check if the VM was attached to an instruction context (that
9 : would have crashed anyway because of pointer chasing). If the VM
10 : is being run outside the Solana runtime, it should never invoke
11 : this syscall in the first place. So we treat this as a SIGCALL in
12 : a non-crashing way for the time being. */
13 :
14 : int
15 : fd_vm_syscall_sol_get_clock_sysvar( /**/ void * _vm,
16 : /**/ ulong out_vaddr,
17 : FD_PARAM_UNUSED ulong r2,
18 : FD_PARAM_UNUSED ulong r3,
19 : FD_PARAM_UNUSED ulong r4,
20 : FD_PARAM_UNUSED ulong r5,
21 0 : /**/ ulong * _ret ) {
22 0 : fd_vm_t * vm = _vm;
23 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
24 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
25 :
26 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, sizeof(fd_sol_sysvar_clock_t) ) );
27 :
28 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
29 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
30 0 : return FD_VM_ERR_INVAL;
31 0 : }
32 :
33 0 : fd_vm_haddr_query_t var_query = {
34 0 : .vaddr = out_vaddr,
35 0 : .align = FD_VM_ALIGN_RUST_SYSVAR_CLOCK,
36 0 : .sz = sizeof(fd_sol_sysvar_clock_t),
37 0 : .is_slice = 0,
38 0 : };
39 :
40 0 : fd_vm_haddr_query_t * queries[] = { &var_query };
41 0 : FD_VM_TRANSLATE_MUT( vm, queries );
42 :
43 0 : fd_sol_sysvar_clock_t clock = fd_sysvar_cache_clock_read_nofail( instr_ctx->sysvar_cache );
44 0 : memcpy( var_query.haddr, &clock, sizeof(fd_sol_sysvar_clock_t) );
45 :
46 0 : *_ret = 0UL;
47 0 : return FD_VM_SUCCESS;
48 0 : }
49 :
50 : int
51 : fd_vm_syscall_sol_get_epoch_schedule_sysvar( /**/ void * _vm,
52 : /**/ ulong out_vaddr,
53 : FD_PARAM_UNUSED ulong r2,
54 : FD_PARAM_UNUSED ulong r3,
55 : FD_PARAM_UNUSED ulong r4,
56 : FD_PARAM_UNUSED ulong r5,
57 0 : /**/ ulong * _ret ) {
58 0 : fd_vm_t * vm = _vm;
59 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
60 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
61 :
62 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, sizeof(fd_epoch_schedule_t) ) );
63 :
64 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
65 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
66 0 : return FD_VM_ERR_INVAL;
67 0 : }
68 :
69 0 : fd_vm_haddr_query_t var_query = {
70 0 : .vaddr = out_vaddr,
71 0 : .align = FD_VM_ALIGN_RUST_SYSVAR_EPOCH_SCHEDULE,
72 0 : .sz = sizeof(fd_epoch_schedule_t),
73 0 : .is_slice = 0,
74 0 : };
75 :
76 0 : fd_vm_haddr_query_t * queries[] = { &var_query };
77 0 : FD_VM_TRANSLATE_MUT( vm, queries );
78 :
79 0 : fd_epoch_schedule_t schedule;
80 0 : if( FD_UNLIKELY( !fd_sysvar_cache_epoch_schedule_read( instr_ctx->sysvar_cache, &schedule ) ) ) {
81 0 : FD_TXN_ERR_FOR_LOG_INSTR( vm->instr_ctx->txn_out, FD_EXECUTOR_INSTR_ERR_UNSUPPORTED_SYSVAR, vm->instr_ctx->txn_out->err.exec_err_idx );
82 0 : return FD_VM_ERR_INVAL;
83 0 : }
84 0 : memcpy( var_query.haddr, &schedule, sizeof(fd_epoch_schedule_t) );
85 :
86 0 : *_ret = 0UL;
87 0 : return FD_VM_SUCCESS;
88 0 : }
89 :
90 : int
91 : fd_vm_syscall_sol_get_rent_sysvar( /**/ void * _vm,
92 : /**/ ulong out_vaddr,
93 : FD_PARAM_UNUSED ulong r2,
94 : FD_PARAM_UNUSED ulong r3,
95 : FD_PARAM_UNUSED ulong r4,
96 : FD_PARAM_UNUSED ulong r5,
97 0 : /**/ ulong * _ret ) {
98 0 : fd_vm_t * vm = _vm;
99 :
100 : /* Unreachable in a real SVM, used for testing */
101 :
102 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
103 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
104 :
105 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, sizeof(fd_rent_t) ) );
106 :
107 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
108 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
109 0 : return FD_VM_ERR_INVAL;
110 0 : }
111 :
112 0 : fd_vm_haddr_query_t var_query = {
113 0 : .vaddr = out_vaddr,
114 0 : .align = FD_VM_ALIGN_RUST_SYSVAR_RENT,
115 0 : .sz = sizeof(fd_rent_t),
116 0 : .is_slice = 0,
117 0 : };
118 :
119 0 : fd_vm_haddr_query_t * queries[] = { &var_query };
120 0 : FD_VM_TRANSLATE_MUT( vm, queries );
121 :
122 0 : fd_rent_t rent = fd_sysvar_cache_rent_read_nofail( instr_ctx->sysvar_cache );
123 0 : memcpy( var_query.haddr, &rent, sizeof(fd_rent_t) );
124 :
125 0 : *_ret = 0UL;
126 0 : return FD_VM_SUCCESS;
127 0 : }
128 :
129 : /* https://github.com/anza-xyz/agave/blob/v2.3.2/programs/bpf_loader/src/syscalls/sysvar.rs#L149 */
130 : int
131 : fd_vm_syscall_sol_get_last_restart_slot_sysvar( /**/ void * _vm,
132 : /**/ ulong out_vaddr,
133 : FD_PARAM_UNUSED ulong r2,
134 : FD_PARAM_UNUSED ulong r3,
135 : FD_PARAM_UNUSED ulong r4,
136 : FD_PARAM_UNUSED ulong r5,
137 0 : /**/ ulong * _ret ) {
138 0 : fd_vm_t * vm = _vm;
139 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
140 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
141 :
142 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, sizeof(fd_sol_sysvar_last_restart_slot_t) ) );
143 :
144 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
145 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
146 0 : return FD_VM_ERR_INVAL;
147 0 : }
148 :
149 0 : fd_vm_haddr_query_t var_query = {
150 0 : .vaddr = out_vaddr,
151 0 : .align = FD_VM_ALIGN_RUST_SYSVAR_LAST_RESTART_SLOT,
152 0 : .sz = sizeof(fd_sol_sysvar_last_restart_slot_t),
153 0 : .is_slice = 0,
154 0 : };
155 :
156 0 : fd_vm_haddr_query_t * queries[] = { &var_query };
157 0 : FD_VM_TRANSLATE_MUT( vm, queries );
158 :
159 0 : fd_sol_sysvar_last_restart_slot_t last_restart_slot;
160 0 : if( FD_UNLIKELY( !fd_sysvar_cache_last_restart_slot_read( vm->instr_ctx->sysvar_cache, &last_restart_slot ) ) ) {
161 0 : FD_TXN_ERR_FOR_LOG_INSTR( vm->instr_ctx->txn_out, FD_EXECUTOR_INSTR_ERR_UNSUPPORTED_SYSVAR, vm->instr_ctx->txn_out->err.exec_err_idx );
162 0 : return FD_VM_ERR_INVAL;
163 0 : }
164 :
165 0 : memcpy( var_query.haddr, &last_restart_slot, sizeof(fd_sol_sysvar_last_restart_slot_t) );
166 :
167 0 : *_ret = 0UL;
168 0 : return FD_VM_SUCCESS;
169 0 : }
170 :
171 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L167-L232 */
172 : int
173 : fd_vm_syscall_sol_get_sysvar( /**/ void * _vm,
174 : /**/ ulong sysvar_id_vaddr,
175 : /**/ ulong out_vaddr,
176 : /**/ ulong offset,
177 : /**/ ulong sz,
178 : FD_PARAM_UNUSED ulong r5,
179 0 : /**/ ulong * _ret ) {
180 0 : fd_vm_t * vm = _vm;
181 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
182 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
183 :
184 : /* sysvar_id_cost seems to just always be 32 / 250 = 0...
185 : https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L190-L197 */
186 0 : ulong sysvar_buf_cost = sz / FD_VM_CPI_BYTES_PER_UNIT;
187 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, fd_ulong_max( sysvar_buf_cost, FD_VM_MEM_OP_BASE_COST ) ) );
188 :
189 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
190 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
191 0 : return FD_VM_ERR_INVAL;
192 0 : }
193 :
194 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/sysvar.rs#L207-L211 */
195 0 : fd_vm_haddr_query_t var_query = {
196 0 : .vaddr = out_vaddr,
197 0 : .align = FD_VM_ALIGN_RUST_U8,
198 0 : .sz = sz,
199 0 : .is_slice = 1,
200 0 : };
201 :
202 0 : fd_vm_haddr_query_t * queries[] = { &var_query };
203 0 : FD_VM_TRANSLATE_MUT( vm, queries );
204 :
205 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L199-L200 */
206 0 : const fd_pubkey_t * sysvar_id = FD_VM_MEM_HADDR_LD( vm, sysvar_id_vaddr, FD_VM_ALIGN_RUST_PUBKEY, FD_PUBKEY_FOOTPRINT );
207 :
208 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L205-L208 */
209 0 : ulong offset_length;
210 0 : int err = fd_int_if( __builtin_uaddl_overflow( offset, sz, &offset_length ), FD_EXECUTOR_INSTR_ERR_ARITHMETIC_OVERFLOW, FD_EXECUTOR_INSTR_SUCCESS );
211 0 : if( FD_UNLIKELY( err ) ) {
212 0 : FD_VM_ERR_FOR_LOG_INSTR( vm, err );
213 0 : return FD_VM_SYSCALL_ERR_ABORT;
214 0 : }
215 :
216 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L210-L213
217 : We don't need this, we already checked we can store in out_vaddr with requested sz. */
218 :
219 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L215-L221 */
220 0 : if( FD_UNLIKELY( memcmp( sysvar_id->uc, fd_sysvar_clock_id.uc, FD_PUBKEY_FOOTPRINT ) &&
221 0 : memcmp( sysvar_id->uc, fd_sysvar_epoch_schedule_id.uc, FD_PUBKEY_FOOTPRINT ) &&
222 0 : memcmp( sysvar_id->uc, fd_sysvar_epoch_rewards_id.uc, FD_PUBKEY_FOOTPRINT ) &&
223 0 : memcmp( sysvar_id->uc, fd_sysvar_rent_id.uc, FD_PUBKEY_FOOTPRINT ) &&
224 0 : memcmp( sysvar_id->uc, fd_sysvar_slot_hashes_id.uc, FD_PUBKEY_FOOTPRINT ) &&
225 0 : memcmp( sysvar_id->uc, fd_sysvar_stake_history_id.uc, FD_PUBKEY_FOOTPRINT ) &&
226 0 : memcmp( sysvar_id->uc, fd_sysvar_last_restart_slot_id.uc, FD_PUBKEY_FOOTPRINT ) ) ) {
227 0 : *_ret = 2UL;
228 0 : return FD_VM_SUCCESS;
229 0 : }
230 :
231 0 : ulong sysvar_buf_len;
232 0 : uchar const * sysvar_buf =
233 0 : fd_sysvar_cache_data_query( vm->instr_ctx->sysvar_cache, sysvar_id, &sysvar_buf_len );
234 0 : if( FD_UNLIKELY( !sysvar_buf ) ) {
235 0 : *_ret = 2UL;
236 0 : return FD_VM_SUCCESS;
237 0 : }
238 :
239 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/sysvar.rs#L223-L228
240 : Note the length check is at the very end to fail after performing sufficient checks. */
241 :
242 0 : if( FD_UNLIKELY( offset_length>sysvar_buf_len ) ) {
243 0 : *_ret = 1UL;
244 0 : return FD_VM_SUCCESS;
245 0 : }
246 :
247 0 : if( FD_UNLIKELY( sz==0UL ) ) {
248 0 : *_ret = 0UL;
249 0 : return FD_VM_SUCCESS;
250 0 : }
251 :
252 0 : fd_memcpy( var_query.haddr, sysvar_buf + offset, sz );
253 0 : *_ret = 0;
254 0 : return FD_VM_SUCCESS;
255 0 : }
256 :
257 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2043-L2118 */
258 : int
259 : fd_vm_syscall_sol_get_epoch_stake( /**/ void * _vm,
260 : /**/ ulong var_addr,
261 : FD_PARAM_UNUSED ulong r2,
262 : FD_PARAM_UNUSED ulong r3,
263 : FD_PARAM_UNUSED ulong r4,
264 : FD_PARAM_UNUSED ulong r5,
265 0 : /**/ ulong * _ret ) {
266 0 : fd_vm_t * vm = (fd_vm_t *)_vm;
267 :
268 : /* Var addr of 0 returns the total active stake on the cluster.
269 :
270 : https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2057-L2075 */
271 0 : if( FD_UNLIKELY( var_addr==0UL ) ) {
272 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2065-L2066 */
273 0 : FD_VM_CU_UPDATE( vm, FD_VM_SYSCALL_BASE_COST );
274 :
275 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2074 */
276 0 : *_ret = fd_bank_total_epoch_stake_get( vm->instr_ctx->bank );
277 0 : return FD_VM_SUCCESS;
278 0 : }
279 :
280 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2083-L2091
281 : FD_PUBKEY_FOOTPRINT/FD_VM_CPI_BYTES_PER_UNIT is always 32/250 = 0,
282 : so we can omit it */
283 :
284 0 : FD_VM_CU_UPDATE( vm, FD_VM_MEM_OP_BASE_COST + FD_VM_SYSCALL_BASE_COST );
285 :
286 : /* https://github.com/anza-xyz/agave/blob/v2.1.0/programs/bpf_loader/src/syscalls/mod.rs#L2103-L2104 */
287 0 : const fd_pubkey_t * vote_address = FD_VM_MEM_HADDR_LD( vm, var_addr, FD_VM_ALIGN_RUST_PUBKEY, FD_PUBKEY_FOOTPRINT );
288 :
289 : /* https://github.com/anza-xyz/agave/blob/v2.2.14/runtime/src/bank.rs#L6954 */
290 0 : fd_vote_states_t const * vote_states = fd_bank_vote_states_prev_locking_query( vm->instr_ctx->bank );
291 0 : fd_vote_state_ele_t const * vote_state_ele = fd_vote_states_query_const( vote_states, vote_address );
292 0 : *_ret = vote_state_ele ? vote_state_ele->stake : 0UL;
293 0 : fd_bank_vote_states_prev_end_locking_query( vm->instr_ctx->bank );
294 :
295 0 : return FD_VM_SUCCESS;
296 0 : }
297 :
298 : int
299 : fd_vm_syscall_sol_get_stack_height( /**/ void * _vm,
300 : FD_PARAM_UNUSED ulong r1,
301 : FD_PARAM_UNUSED ulong r2,
302 : FD_PARAM_UNUSED ulong r3,
303 : FD_PARAM_UNUSED ulong r4,
304 : FD_PARAM_UNUSED ulong r5,
305 0 : /**/ ulong * _ret ) {
306 : /* https://github.com/anza-xyz/agave/blob/v2.0.8/programs/bpf_loader/src/syscalls/mod.rs#L1547 */
307 0 : fd_vm_t * vm = (fd_vm_t *)_vm;
308 :
309 0 : FD_VM_CU_UPDATE( vm, FD_VM_SYSCALL_BASE_COST );
310 :
311 0 : *_ret = vm->instr_ctx->runtime->instr.stack_sz;
312 0 : return FD_VM_SUCCESS;
313 0 : }
314 :
315 : int
316 : fd_vm_syscall_sol_get_return_data( /**/ void * _vm,
317 : /**/ ulong return_data_vaddr,
318 : /**/ ulong sz,
319 : /**/ ulong program_id_vaddr,
320 : FD_PARAM_UNUSED ulong r4,
321 : FD_PARAM_UNUSED ulong r5,
322 0 : /**/ ulong * _ret ) {
323 0 : fd_vm_t * vm = (fd_vm_t *)_vm;
324 :
325 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1465 */
326 0 : FD_VM_CU_UPDATE( vm, FD_VM_SYSCALL_BASE_COST );
327 :
328 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1467 */
329 0 : fd_txn_return_data_t const * return_data = &vm->instr_ctx->txn_out->details.return_data;
330 :
331 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1468 */
332 0 : ulong length = fd_ulong_min( return_data->len, sz );
333 :
334 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1469-L1492 */
335 0 : if( FD_LIKELY( length ) ) {
336 :
337 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1470-L1474 */
338 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( length, sizeof(fd_pubkey_t) ) / FD_VM_CPI_BYTES_PER_UNIT );
339 :
340 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1476-L1481 */
341 0 : fd_vm_haddr_query_t return_data_query = {
342 0 : .vaddr = return_data_vaddr,
343 0 : .align = FD_VM_ALIGN_RUST_U8,
344 0 : .sz = length,
345 0 : .is_slice = 1
346 0 : };
347 :
348 0 : fd_vm_haddr_query_t program_id_query = {
349 0 : .vaddr = program_id_vaddr,
350 0 : .align = FD_VM_ALIGN_RUST_PUBKEY,
351 0 : .sz = sizeof(fd_pubkey_t),
352 0 : .is_slice = 0
353 0 : };
354 :
355 0 : fd_vm_haddr_query_t * queries[] = { &return_data_query, &program_id_query };
356 0 : FD_VM_TRANSLATE_MUT( vm, queries );
357 :
358 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1490-L1491 */
359 0 : memcpy( return_data_query.haddr, return_data->data, length );
360 0 : memcpy( program_id_query.haddr, &return_data->program_id, sizeof(fd_pubkey_t) );
361 0 : }
362 :
363 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1495 */
364 0 : *_ret = return_data->len;
365 0 : return FD_VM_SUCCESS;
366 0 : }
367 :
368 : int
369 : fd_vm_syscall_sol_set_return_data( /**/ void * _vm,
370 : /**/ ulong src_vaddr,
371 : /**/ ulong src_sz,
372 : FD_PARAM_UNUSED ulong r3,
373 : FD_PARAM_UNUSED ulong r4,
374 : FD_PARAM_UNUSED ulong r5,
375 0 : /**/ ulong * _ret ) {
376 : /* https://github.com/anza-xyz/agave/blob/v2.0.8/programs/bpf_loader/src/syscalls/mod.rs#L1297 */
377 0 : fd_vm_t * vm = (fd_vm_t *)_vm;
378 :
379 : /* In the original version of this code, there was an FD_TEST
380 : to check if the VM was attached to an instruction context (that
381 : would have crashed anyway because of pointer chasing). If the VM
382 : is being run outside the Solana runtime, it should never invoke
383 : this syscall in the first place. So we treat this as a SIGCALL in
384 : a non-crashing way for the time being. */
385 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
386 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
387 :
388 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSCALL_BASE_COST, src_sz / FD_VM_CPI_BYTES_PER_UNIT ) );
389 :
390 : /* https://github.com/anza-xyz/agave/blob/v2.0.8/programs/bpf_loader/src/syscalls/mod.rs#L1316 */
391 0 : if( FD_UNLIKELY( src_sz>FD_VM_RETURN_DATA_MAX ) ) {
392 : /* TODO: this is a bit annoying, we may want to unify return codes...
393 : - FD_VM_SYSCALL_ERR_RETURN_DATA_TOO_LARGE is Agave's return code,
394 : also used for logging */
395 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_RETURN_DATA_TOO_LARGE );
396 0 : return FD_VM_SYSCALL_ERR_RETURN_DATA_TOO_LARGE;
397 0 : }
398 :
399 : /* src_sz == 0 is ok */
400 0 : void const * src = FD_VM_MEM_SLICE_HADDR_LD( vm, src_vaddr, FD_VM_ALIGN_RUST_U8, src_sz );
401 :
402 : /* https://github.com/anza-xyz/agave/blob/v2.2.0/programs/bpf_loader/src/syscalls/mod.rs#L1480-L1484 */
403 0 : fd_pubkey_t const * program_id = NULL;
404 0 : int err = fd_exec_instr_ctx_get_last_program_key( vm->instr_ctx, &program_id );
405 0 : if( FD_UNLIKELY( err ) ) {
406 0 : FD_VM_ERR_FOR_LOG_INSTR( vm, err );
407 0 : return err;
408 0 : }
409 :
410 0 : fd_txn_return_data_t * return_data = &instr_ctx->txn_out->details.return_data;
411 :
412 0 : return_data->len = src_sz;
413 0 : if( FD_LIKELY( src_sz!=0UL ) ) {
414 0 : fd_memcpy( return_data->data, src, src_sz );
415 0 : }
416 0 : return_data->program_id = *program_id;
417 :
418 0 : *_ret = 0;
419 0 : return FD_VM_SUCCESS;
420 0 : }
421 :
422 : /* Used to query and convey information about the sibling instruction
423 : https://github.com/anza-xyz/agave/blob/70089cce5119c9afaeb2986e2ecaa6d4505ec15d/sdk/program/src/instruction.rs#L676
424 :
425 : */
426 : struct fd_vm_syscall_processed_sibling_instruction {
427 : /* Length of the instruction data */
428 : ulong data_len;
429 : /* Number of accounts */
430 : ulong accounts_len;
431 : };
432 : typedef struct fd_vm_syscall_processed_sibling_instruction fd_vm_syscall_processed_sibling_instruction_t;
433 :
434 0 : #define FD_VM_SYSCALL_PROCESSED_SIBLING_INSTRUCTION_SIZE (16UL)
435 0 : #define FD_VM_SYSCALL_PROCESSED_SIBLING_INSTRUCTION_ALIGN (8UL )
436 :
437 : /* https://github.com/anza-xyz/agave/blob/70089cce5119c9afaeb2986e2ecaa6d4505ec15d/programs/bpf_loader/src/syscalls/mod.rs#L1402 */
438 : int
439 : fd_vm_syscall_sol_get_processed_sibling_instruction(
440 : void * _vm,
441 : ulong index,
442 : ulong result_meta_vaddr,
443 : ulong result_program_id_vaddr,
444 : ulong result_data_vaddr,
445 : ulong result_accounts_vaddr,
446 : ulong * _ret
447 0 : ) {
448 0 : fd_vm_t * vm = (fd_vm_t *)_vm;
449 :
450 : /* Consume base compute cost
451 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1513 */
452 0 : FD_VM_CU_UPDATE( vm, FD_VM_SYSCALL_BASE_COST );
453 :
454 : /* Get the current instruction stack height. This value is 1-indexed
455 : (top level instruction has a stack height of 1).
456 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1517 */
457 0 : ulong stack_height = vm->instr_ctx->runtime->instr.stack_sz;
458 :
459 : /* Reverse iterate through the instruction trace, ignoring anything except instructions on the same level.
460 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1518-L1522 */
461 0 : ulong instruction_trace_length = vm->instr_ctx->runtime->instr.trace_length;
462 0 : ulong reverse_index_at_stack_height = 0UL;
463 0 : fd_exec_instr_trace_entry_t * found_instruction_context = NULL;
464 0 : for( ulong index_in_trace=instruction_trace_length; index_in_trace>0UL; index_in_trace-- ) {
465 :
466 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1524-L1526
467 : This error can never happen */
468 :
469 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1527-L1529 */
470 0 : fd_exec_instr_trace_entry_t * instruction_context = &vm->instr_ctx->runtime->instr.trace[ index_in_trace-1UL ];
471 0 : if( FD_LIKELY( instruction_context->stack_height<stack_height ) ) {
472 0 : break;
473 0 : }
474 :
475 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1530-L1536 */
476 0 : if( FD_UNLIKELY( instruction_context->stack_height==stack_height ) ) {
477 0 : if( FD_UNLIKELY( fd_ulong_sat_add( index, 1UL )==reverse_index_at_stack_height ) ) {
478 0 : found_instruction_context = instruction_context;
479 0 : break;
480 0 : }
481 0 : reverse_index_at_stack_height = fd_ulong_sat_add( reverse_index_at_stack_height, 1UL );
482 0 : }
483 0 : }
484 :
485 : /* If we have found an entry, then copy the instruction into the
486 : result addresses.
487 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1539-L1588
488 : */
489 0 : if( FD_LIKELY( found_instruction_context != NULL ) ) {
490 0 : fd_instr_info_t * instr_info = found_instruction_context->instr_info;
491 :
492 0 : fd_vm_haddr_query_t result_header_query = {
493 0 : .vaddr = result_meta_vaddr,
494 0 : .align = FD_VM_SYSCALL_PROCESSED_SIBLING_INSTRUCTION_ALIGN,
495 0 : .sz = FD_VM_SYSCALL_PROCESSED_SIBLING_INSTRUCTION_SIZE,
496 0 : .is_slice = 0,
497 0 : };
498 :
499 0 : fd_vm_haddr_query_t * queries[] = { &result_header_query };
500 0 : FD_VM_TRANSLATE_MUT( vm, queries );
501 :
502 0 : fd_vm_syscall_processed_sibling_instruction_t * result_header = result_header_query.haddr;
503 :
504 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1546-L1583 */
505 0 : if( result_header->data_len==instr_info->data_sz && result_header->accounts_len==instr_info->acct_cnt ) {
506 0 : fd_vm_haddr_query_t program_id_query = {
507 0 : .vaddr = result_program_id_vaddr,
508 0 : .align = FD_VM_ALIGN_RUST_PUBKEY,
509 0 : .sz = sizeof(fd_pubkey_t),
510 0 : .is_slice = 0,
511 0 : };
512 :
513 0 : fd_vm_haddr_query_t data_query = {
514 0 : .vaddr = result_data_vaddr,
515 0 : .align = FD_VM_ALIGN_RUST_U8,
516 0 : .sz = result_header->data_len,
517 0 : .is_slice = 1,
518 0 : };
519 :
520 0 : fd_vm_haddr_query_t accounts_query = {
521 0 : .vaddr = result_accounts_vaddr,
522 0 : .align = FD_VM_RUST_ACCOUNT_META_ALIGN,
523 0 : .sz = fd_ulong_sat_mul( result_header->accounts_len, FD_VM_RUST_ACCOUNT_META_SIZE ),
524 0 : .is_slice = 1,
525 0 : };
526 :
527 0 : fd_vm_haddr_query_t * queries[] = { &program_id_query, &data_query, &accounts_query, &result_header_query };
528 0 : FD_VM_TRANSLATE_MUT( vm, queries );
529 :
530 0 : fd_pubkey_t * program_id = program_id_query.haddr;
531 0 : uchar * data = data_query.haddr;
532 0 : fd_vm_rust_account_meta_t * accounts = accounts_query.haddr;
533 :
534 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1561-L1562 */
535 0 : fd_pubkey_t const * instr_ctx_program_id = NULL;
536 0 : int err = fd_runtime_get_key_of_account_at_index( vm->instr_ctx->txn_out,
537 0 : instr_info->program_id,
538 0 : &instr_ctx_program_id );
539 0 : if( FD_UNLIKELY( err ) ) {
540 0 : FD_VM_ERR_FOR_LOG_INSTR( vm, err );
541 0 : return err;
542 0 : }
543 0 : fd_memcpy( program_id, instr_ctx_program_id, sizeof(fd_pubkey_t) );
544 :
545 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1563 */
546 0 : fd_memcpy( data, instr_info->data, instr_info->data_sz );
547 :
548 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1564-L1581 */
549 0 : for( ushort i=0; i<instr_info->acct_cnt; i++ ) {
550 0 : fd_pubkey_t const * account_key;
551 0 : ushort txn_idx = instr_info->accounts[ i ].index_in_transaction;
552 0 : err = fd_runtime_get_key_of_account_at_index( vm->instr_ctx->txn_out, txn_idx, &account_key );
553 0 : if( FD_UNLIKELY( err ) ) {
554 0 : FD_VM_ERR_FOR_LOG_INSTR( vm, err );
555 0 : return err;
556 0 : }
557 :
558 0 : fd_memcpy( accounts[ i ].pubkey, account_key, sizeof(fd_pubkey_t) );
559 0 : accounts[ i ].is_signer = !!(instr_info->accounts[ i ].is_signer );
560 0 : accounts[ i ].is_writable = !!(instr_info->accounts[ i ].is_writable );
561 0 : }
562 0 : } else {
563 : /* Copy the actual metadata into the result meta struct
564 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1584-L1586 */
565 0 : result_header->data_len = instr_info->data_sz;
566 0 : result_header->accounts_len = instr_info->acct_cnt;
567 0 : }
568 :
569 : /* Return true as we found a sibling instruction
570 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1588 */
571 0 : *_ret = 1UL;
572 0 : return FD_VM_SUCCESS;
573 0 : }
574 :
575 : /* Return false if we didn't find a sibling instruction
576 : https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/mod.rs#L1590 */
577 0 : *_ret = 0UL;
578 0 : return FD_VM_SUCCESS;
579 0 : }
580 :
581 : /* https://github.com/anza-xyz/agave/blob/v2.3.1/programs/bpf_loader/src/syscalls/sysvar.rs#L80 */
582 : int
583 : fd_vm_syscall_sol_get_epoch_rewards_sysvar( /**/ void * _vm,
584 : /**/ ulong out_vaddr,
585 : FD_PARAM_UNUSED ulong r2,
586 : FD_PARAM_UNUSED ulong r3,
587 : FD_PARAM_UNUSED ulong r4,
588 : FD_PARAM_UNUSED ulong r5,
589 0 : /**/ ulong * _ret ) {
590 0 : fd_vm_t * vm = _vm;
591 0 : fd_exec_instr_ctx_t const * instr_ctx = vm->instr_ctx;
592 0 : if( FD_UNLIKELY( !instr_ctx ) ) return FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME;
593 :
594 0 : FD_VM_CU_UPDATE( vm, fd_ulong_sat_add( FD_VM_SYSVAR_BASE_COST, sizeof(fd_sysvar_epoch_rewards_t) ) );
595 :
596 0 : if( FD_UNLIKELY( vm->stricter_abi_and_runtime_constraints && out_vaddr>=FD_VM_MEM_MAP_INPUT_REGION_START ) ) {
597 0 : FD_VM_ERR_FOR_LOG_SYSCALL( vm, FD_VM_SYSCALL_ERR_INVALID_POINTER );
598 0 : return FD_VM_ERR_INVAL;
599 0 : }
600 :
601 0 : uchar * out = FD_VM_MEM_HADDR_ST( vm, out_vaddr, FD_VM_ALIGN_RUST_SYSVAR_EPOCH_REWARDS, sizeof(fd_sysvar_epoch_rewards_t) );
602 :
603 0 : fd_sysvar_epoch_rewards_t epoch_rewards;
604 0 : if( FD_UNLIKELY( !fd_sysvar_cache_epoch_rewards_read( instr_ctx->sysvar_cache, &epoch_rewards ) ) ) {
605 0 : FD_TXN_ERR_FOR_LOG_INSTR( vm->instr_ctx->txn_out, FD_EXECUTOR_INSTR_ERR_UNSUPPORTED_SYSVAR, vm->instr_ctx->txn_out->err.exec_err_idx );
606 0 : return FD_VM_ERR_INVAL;
607 0 : }
608 0 : memcpy( out, &epoch_rewards, sizeof(fd_sysvar_epoch_rewards_t) );
609 0 : memset( out+81, 0, 7 ); /* padding */
610 :
611 0 : *_ret = 0UL;
612 0 : return FD_VM_SUCCESS;
613 0 : }
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