Line data Source code
1 : #include "fd_vm_private.h"
2 : #include "../runtime/context/fd_exec_slot_ctx.h"
3 : #include "../features/fd_features.h"
4 :
5 : /* fd_vm_syscall_strerror() returns the error message corresponding to err,
6 : intended to be logged by log_collector, or an empty string if the error code
7 : should be omitted in logs for whatever reason. Omitted examples are success,
8 : panic (logged in place)...
9 : See also fd_log_collector_program_failure(). */
10 : char const *
11 0 : fd_vm_syscall_strerror( int err ) {
12 :
13 0 : switch( err ) {
14 :
15 0 : case FD_VM_SYSCALL_ERR_INVALID_STRING: return "invalid utf-8 sequence"; // truncated
16 0 : case FD_VM_SYSCALL_ERR_ABORT: return "SBF program panicked";
17 0 : case FD_VM_SYSCALL_ERR_PANIC: return "SBF program Panicked in..."; // truncated
18 0 : case FD_VM_SYSCALL_ERR_INVOKE_CONTEXT_BORROW_FAILED: return "Cannot borrow invoke context";
19 0 : case FD_VM_SYSCALL_ERR_MALFORMED_SIGNER_SEED: return "Malformed signer seed"; // truncated
20 0 : case FD_VM_SYSCALL_ERR_BAD_SEEDS: return "Could not create program address with signer seeds"; // truncated
21 0 : case FD_VM_SYSCALL_ERR_PROGRAM_NOT_SUPPORTED: return "Program not supported by inner instructions"; // truncated
22 0 : case FD_VM_SYSCALL_ERR_UNALIGNED_POINTER: return "Unaligned pointer";
23 0 : case FD_VM_SYSCALL_ERR_TOO_MANY_SIGNERS: return "Too many signers";
24 0 : case FD_VM_SYSCALL_ERR_INSTRUCTION_TOO_LARGE: return "Instruction passed to inner instruction is too large"; // truncated
25 0 : case FD_VM_SYSCALL_ERR_TOO_MANY_ACCOUNTS: return "Too many accounts passed to inner instruction";
26 0 : case FD_VM_SYSCALL_ERR_COPY_OVERLAPPING: return "Overlapping copy";
27 0 : case FD_VM_SYSCALL_ERR_RETURN_DATA_TOO_LARGE: return "Return data too large"; // truncated
28 0 : case FD_VM_SYSCALL_ERR_TOO_MANY_SLICES: return "Hashing too many sequences";
29 0 : case FD_VM_SYSCALL_ERR_INVALID_LENGTH: return "InvalidLength";
30 0 : case FD_VM_SYSCALL_ERR_MAX_INSTRUCTION_DATA_LEN_EXCEEDED: return "Invoked an instruction with data that is too large"; // truncated
31 0 : case FD_VM_SYSCALL_ERR_MAX_INSTRUCTION_ACCOUNTS_EXCEEDED: return "Invoked an instruction with too many accounts"; // truncated
32 0 : case FD_VM_SYSCALL_ERR_MAX_INSTRUCTION_ACCOUNT_INFOS_EXCEEDED: return "Invoked an instruction with too many account info's"; // truncated
33 0 : case FD_VM_SYSCALL_ERR_INVALID_ATTRIBUTE: return "InvalidAttribute";
34 0 : case FD_VM_SYSCALL_ERR_INVALID_POINTER: return "Invalid pointer";
35 0 : case FD_VM_SYSCALL_ERR_ARITHMETIC_OVERFLOW: return "Arithmetic overflow";
36 :
37 0 : case FD_VM_SYSCALL_ERR_INSTR_ERR: return "Instruction error";
38 0 : case FD_VM_SYSCALL_ERR_INVALID_PDA: return "Invalid PDA";
39 0 : case FD_VM_SYSCALL_ERR_COMPUTE_BUDGET_EXCEEDED: return "Compute budget exceeded";
40 0 : case FD_VM_SYSCALL_ERR_SEGFAULT: return "Segmentation fault";
41 0 : case FD_VM_SYSCALL_ERR_OUTSIDE_RUNTIME: return "Syscall executed outside runtime";
42 :
43 :
44 0 : case FD_VM_SYSCALL_ERR_POSEIDON_INVALID_PARAMS: return "Syscall error: Invalid parameters.";
45 0 : case FD_VM_SYSCALL_ERR_POSEIDON_INVALID_ENDIANNESS: return "Syscall error: Invalid endianness.";
46 :
47 0 : default: break;
48 0 : }
49 :
50 0 : return "";
51 0 : }
52 :
53 : /* fd_vm_ebpf_strerror() returns the error message corresponding to err,
54 : intended to be logged by log_collector, or an empty string if the error code
55 : should be omitted in logs for whatever reason.
56 : See also fd_log_collector_program_failure(). */
57 : char const *
58 0 : fd_vm_ebpf_strerror( int err ) {
59 :
60 0 : switch( err ) {
61 :
62 0 : case FD_VM_ERR_EBPF_ELF_ERROR: return "ELF error"; // truncated
63 0 : case FD_VM_ERR_EBPF_FUNCTION_ALREADY_REGISTERED: return "function was already registered"; // truncated
64 0 : case FD_VM_ERR_EBPF_CALL_DEPTH_EXCEEDED: return "exceeded max BPF to BPF call depth";
65 0 : case FD_VM_ERR_EBPF_EXIT_ROOT_CALL_FRAME: return "attempted to exit root call frame";
66 0 : case FD_VM_ERR_EBPF_DIVIDE_BY_ZERO: return "divide by zero at BPF instruction";
67 0 : case FD_VM_ERR_EBPF_DIVIDE_OVERFLOW: return "division overflow at BPF instruction";
68 0 : case FD_VM_ERR_EBPF_EXECUTION_OVERRUN: return "attempted to execute past the end of the text segment at BPF instruction";
69 0 : case FD_VM_ERR_EBPF_CALL_OUTSIDE_TEXT_SEGMENT: return "callx attempted to call outside of the text segment";
70 0 : case FD_VM_ERR_EBPF_EXCEEDED_MAX_INSTRUCTIONS: return "exceeded CUs meter at BPF instruction";
71 0 : case FD_VM_ERR_EBPF_JIT_NOT_COMPILED: return "program has not been JIT-compiled";
72 0 : case FD_VM_ERR_EBPF_INVALID_VIRTUAL_ADDRESS: return "invalid virtual address"; // truncated
73 0 : case FD_VM_ERR_EBPF_INVALID_MEMORY_REGION: return "Invalid memory region at index"; // truncated
74 0 : case FD_VM_ERR_EBPF_ACCESS_VIOLATION: return "Access violation"; // truncated
75 0 : case FD_VM_ERR_EBPF_STACK_ACCESS_VIOLATION: return "Access violation in stack frame"; // truncated
76 0 : case FD_VM_ERR_EBPF_INVALID_INSTRUCTION: return "invalid BPF instruction";
77 0 : case FD_VM_ERR_EBPF_UNSUPPORTED_INSTRUCTION: return "unsupported BPF instruction";
78 0 : case FD_VM_ERR_EBPF_EXHAUSTED_TEXT_SEGMENT: return "Compilation exhausted text segment at BPF instruction"; // truncated
79 0 : case FD_VM_ERR_EBPF_LIBC_INVOCATION_FAILED: return "Libc calling returned error code"; // truncated
80 0 : case FD_VM_ERR_EBPF_VERIFIER_ERROR: return "Verifier error"; // truncated
81 0 : case FD_VM_ERR_EBPF_SYSCALL_ERROR: return ""; // handled explicitly via fd_vm_syscall_strerror()
82 :
83 0 : default: break;
84 0 : }
85 :
86 0 : return "";
87 0 : }
88 :
89 : /* fd_vm_strerror() returns the error message corresponding to err, used internally
90 : for system logs, NOT for log_collector / transaction logs. */
91 : char const *
92 42 : fd_vm_strerror( int err ) {
93 :
94 42 : switch( err ) {
95 :
96 : /* "Standard" Firedancer error codes */
97 :
98 3 : case FD_VM_SUCCESS: return "SUCCESS success";
99 3 : case FD_VM_ERR_INVAL: return "INVAL invalid request";
100 3 : case FD_VM_ERR_UNSUP: return "UNSUP unsupported request";
101 3 : case FD_VM_ERR_FULL: return "FULL storage full";
102 3 : case FD_VM_ERR_EMPTY: return "EMPTY nothing to do";
103 3 : case FD_VM_ERR_IO: return "IO input-output error";
104 :
105 : /* VM exec error codes */
106 :
107 0 : case FD_VM_ERR_SIGFPE: return "SIGFPE division by zero";
108 :
109 : /* VM validate error codes */
110 :
111 3 : case FD_VM_ERR_INVALID_OPCODE: return "INVALID_OPCODE detected an invalid opcode";
112 3 : case FD_VM_ERR_INVALID_SRC_REG: return "INVALID_SRC_REG detected an invalid source register";
113 3 : case FD_VM_ERR_INVALID_DST_REG: return "INVALID_DST_REG detected an invalid destination register";
114 3 : case FD_VM_ERR_JMP_OUT_OF_BOUNDS: return "JMP_OUT_OF_BOUNDS detected an out of bounds jump";
115 3 : case FD_VM_ERR_JMP_TO_ADDL_IMM: return "JMP_TO_ADDL_IMM detected a jump to an addl imm";
116 3 : case FD_VM_ERR_INVALID_END_IMM: return "INVALID_END_IMM detected an invalid immediate for an endianness conversion instruction";
117 3 : case FD_VM_ERR_INCOMPLETE_LDQ: return "INCOMPLETE_LDQ detected an incomplete ldq at program end";
118 3 : case FD_VM_ERR_LDQ_NO_ADDL_IMM: return "LDQ_NO_ADDL_IMM detected a ldq without an addl imm following it";
119 0 : case FD_VM_ERR_INVALID_REG: return "INVALID_REG detected an invalid register number in a callx instruction";
120 0 : case FD_VM_ERR_BAD_TEXT: return "BAD_TEXT detected a bad text section";
121 0 : case FD_VM_SH_OVERFLOW: return "SH_OVERFLOW detected a shift overflow in an instruction";
122 0 : case FD_VM_TEXT_SZ_UNALIGNED: return "TEXT_SZ_UNALIGNED detected an unaligned text section size (not a multiple of 8)";
123 :
124 0 : default: break;
125 42 : }
126 :
127 0 : return "UNKNOWN probably not a FD_VM_ERR code";
128 42 : }
129 :
130 : /* FIXME: add a pedantic version of this validation that does things
131 : like:
132 : - only 0 imms when the instruction does not use an imm
133 : - same as above but for src/dst reg, offset */
134 : /* FIXME: HANDLING OF LDQ ON NEWER SBPF VERSUS OLDER SBPF (AND WITH CALL
135 : REG) */
136 : /* FIXME: LINK TO SOLANA CODE VALIDATE AND DOUBLE CHECK THIS BEHAVES
137 : IDENTICALLY! */
138 :
139 : int
140 7866 : fd_vm_validate( fd_vm_t const * vm ) {
141 :
142 7866 : ulong sbpf_version = vm->sbpf_version;
143 :
144 : /* A mapping of all the possible 1-byte sBPF opcodes to their
145 : validation criteria. */
146 :
147 645025644 : # define FD_VALID ((uchar)0) /* Valid opcode */
148 7866 : # define FD_CHECK_JMP_V3 ((uchar)1) /* Validation should check that the instruction is a valid jump (v3+) */
149 11712 : # define FD_CHECK_END ((uchar)2) /* Validation should check that the instruction is a valid endianness conversion */
150 199710 : # define FD_CHECK_ST ((uchar)3) /* Validation should check that the instruction is a valid store */
151 7866 : # define FD_CHECK_LDQ ((uchar)4) /* Validation should check that the instruction is a valid load-quad */
152 64549290 : # define FD_CHECK_DIV ((uchar)5) /* Validation should check that the instruction is a valid division by immediate */
153 48331878 : # define FD_CHECK_SH32 ((uchar)6) /* Validation should check that the immediate is a valid 32-bit shift exponent */
154 48357849 : # define FD_CHECK_SH64 ((uchar)7) /* Validation should check that the immediate is a valid 64-bit shift exponent */
155 1639590 : # define FD_INVALID ((uchar)8) /* The opcode is invalid */
156 12003 : # define FD_CHECK_CALL_REG ((uchar)9) /* Validation should check that callx has valid register number */
157 13095 : # define FD_CHECK_CALL_REG_DEPR ((uchar)10) /* Older / deprecated FD_CHECK_CALLX */
158 7866 : # define FD_CHECK_CALL_IMM ((uchar)11) /* Check call against functions registry */
159 7866 : # define FD_CHECK_SYSCALL ((uchar)12) /* Check call against syscalls registry */
160 31683 : # define FD_CHECK_JMP_V0 ((uchar)13) /* Validation should check that the instruction is a valid jump (v0..v2) */
161 :
162 7866 : uchar FD_CHECK_JMP = FD_VM_SBPF_STATIC_SYSCALLS (sbpf_version) ? FD_CHECK_JMP_V3 : FD_CHECK_JMP_V0;
163 :
164 7866 : uchar validation_map[ 256 ] = {
165 7866 : /* 0x00 */ FD_INVALID, /* 0x01 */ FD_INVALID, /* 0x02 */ FD_INVALID, /* 0x03 */ FD_INVALID,
166 7866 : /* 0x04 */ FD_VALID, /* 0x05 */ FD_CHECK_JMP, /* 0x06 */ FD_INVALID, /* 0x07 */ FD_VALID,
167 7866 : /* 0x08 */ FD_INVALID, /* 0x09 */ FD_INVALID, /* 0x0a */ FD_INVALID, /* 0x0b */ FD_INVALID,
168 7866 : /* 0x0c */ FD_VALID, /* 0x0d */ FD_INVALID, /* 0x0e */ FD_INVALID, /* 0x0f */ FD_VALID,
169 7866 : /* 0x10 */ FD_INVALID, /* 0x11 */ FD_INVALID, /* 0x12 */ FD_INVALID, /* 0x13 */ FD_INVALID,
170 7866 : /* 0x14 */ FD_VALID, /* 0x15 */ FD_CHECK_JMP, /* 0x16 */ FD_INVALID, /* 0x17 */ FD_VALID,
171 7866 : /* 0x18 */ FD_INVALID, /* 0x19 */ FD_INVALID, /* 0x1a */ FD_INVALID, /* 0x1b */ FD_INVALID,
172 7866 : /* 0x1c */ FD_VALID, /* 0x1d */ FD_CHECK_JMP, /* 0x1e */ FD_INVALID, /* 0x1f */ FD_VALID,
173 7866 : /* 0x20 */ FD_INVALID, /* 0x21 */ FD_INVALID, /* 0x22 */ FD_INVALID, /* 0x23 */ FD_INVALID,
174 7866 : /* 0x24 */ FD_INVALID, /* 0x25 */ FD_CHECK_JMP, /* 0x26 */ FD_INVALID, /* 0x27 */ FD_CHECK_ST,
175 7866 : /* 0x28 */ FD_INVALID, /* 0x29 */ FD_INVALID, /* 0x2a */ FD_INVALID, /* 0x2b */ FD_INVALID,
176 7866 : /* 0x2c */ FD_VALID, /* 0x2d */ FD_CHECK_JMP, /* 0x2e */ FD_INVALID, /* 0x2f */ FD_CHECK_ST,
177 7866 : /* 0x30 */ FD_INVALID, /* 0x31 */ FD_INVALID, /* 0x32 */ FD_INVALID, /* 0x33 */ FD_INVALID,
178 7866 : /* 0x34 */ FD_INVALID, /* 0x35 */ FD_CHECK_JMP, /* 0x36 */ FD_VALID, /* 0x37 */ FD_CHECK_ST,
179 7866 : /* 0x38 */ FD_INVALID, /* 0x39 */ FD_INVALID, /* 0x3a */ FD_INVALID, /* 0x3b */ FD_INVALID,
180 7866 : /* 0x3c */ FD_VALID, /* 0x3d */ FD_CHECK_JMP, /* 0x3e */ FD_VALID, /* 0x3f */ FD_CHECK_ST,
181 7866 : /* 0x40 */ FD_INVALID, /* 0x41 */ FD_INVALID, /* 0x42 */ FD_INVALID, /* 0x43 */ FD_INVALID,
182 7866 : /* 0x44 */ FD_VALID, /* 0x45 */ FD_CHECK_JMP, /* 0x46 */ FD_CHECK_DIV, /* 0x47 */ FD_VALID,
183 7866 : /* 0x48 */ FD_INVALID, /* 0x49 */ FD_INVALID, /* 0x4a */ FD_INVALID, /* 0x4b */ FD_INVALID,
184 7866 : /* 0x4c */ FD_VALID, /* 0x4d */ FD_CHECK_JMP, /* 0x4e */ FD_VALID, /* 0x4f */ FD_VALID,
185 7866 : /* 0x50 */ FD_INVALID, /* 0x51 */ FD_INVALID, /* 0x52 */ FD_INVALID, /* 0x53 */ FD_INVALID,
186 7866 : /* 0x54 */ FD_VALID, /* 0x55 */ FD_CHECK_JMP, /* 0x56 */ FD_CHECK_DIV, /* 0x57 */ FD_VALID,
187 7866 : /* 0x58 */ FD_INVALID, /* 0x59 */ FD_INVALID, /* 0x5a */ FD_INVALID, /* 0x5b */ FD_INVALID,
188 7866 : /* 0x5c */ FD_VALID, /* 0x5d */ FD_CHECK_JMP, /* 0x5e */ FD_VALID, /* 0x5f */ FD_VALID,
189 7866 : /* 0x60 */ FD_INVALID, /* 0x61 */ FD_INVALID, /* 0x62 */ FD_INVALID, /* 0x63 */ FD_INVALID,
190 7866 : /* 0x64 */ FD_CHECK_SH32, /* 0x65 */ FD_CHECK_JMP, /* 0x66 */ FD_CHECK_DIV, /* 0x67 */ FD_CHECK_SH64,
191 7866 : /* 0x68 */ FD_INVALID, /* 0x69 */ FD_INVALID, /* 0x6a */ FD_INVALID, /* 0x6b */ FD_INVALID,
192 7866 : /* 0x6c */ FD_VALID, /* 0x6d */ FD_CHECK_JMP, /* 0x6e */ FD_VALID, /* 0x6f */ FD_VALID,
193 7866 : /* 0x70 */ FD_INVALID, /* 0x71 */ FD_INVALID, /* 0x72 */ FD_INVALID, /* 0x73 */ FD_INVALID,
194 7866 : /* 0x74 */ FD_CHECK_SH32, /* 0x75 */ FD_CHECK_JMP, /* 0x76 */ FD_CHECK_DIV, /* 0x77 */ FD_CHECK_SH64,
195 7866 : /* 0x78 */ FD_INVALID, /* 0x79 */ FD_INVALID, /* 0x7a */ FD_INVALID, /* 0x7b */ FD_INVALID,
196 7866 : /* 0x7c */ FD_VALID, /* 0x7d */ FD_CHECK_JMP, /* 0x7e */ FD_VALID, /* 0x7f */ FD_VALID,
197 7866 : /* 0x80 */ FD_INVALID, /* 0x81 */ FD_INVALID, /* 0x82 */ FD_INVALID, /* 0x83 */ FD_INVALID,
198 7866 : /* 0x84 */ FD_INVALID, /* 0x85 */ FD_CHECK_CALL_IMM,/*0x86*/FD_VALID, /* 0x87 */ FD_CHECK_ST,
199 7866 : /* 0x88 */ FD_INVALID, /* 0x89 */ FD_INVALID, /* 0x8a */ FD_INVALID, /* 0x8b */ FD_INVALID,
200 7866 : /* 0x8c */ FD_VALID, /* 0x8d */ FD_CHECK_CALL_REG,/*0x8e*/FD_VALID, /* 0x8f */ FD_CHECK_ST,
201 7866 : /* 0x90 */ FD_INVALID, /* 0x91 */ FD_INVALID, /* 0x92 */ FD_INVALID, /* 0x93 */ FD_INVALID,
202 7866 : /* 0x94 */ FD_INVALID, /* 0x95 */ FD_CHECK_SYSCALL,/*0x96*/ FD_VALID, /* 0x97 */ FD_CHECK_ST,
203 7866 : /* 0x98 */ FD_INVALID, /* 0x99 */ FD_INVALID, /* 0x9a */ FD_INVALID, /* 0x9b */ FD_INVALID,
204 7866 : /* 0x9c */ FD_VALID, /* 0x9d */ FD_VALID, /* 0x9e */ FD_VALID, /* 0x9f */ FD_CHECK_ST,
205 7866 : /* 0xa0 */ FD_INVALID, /* 0xa1 */ FD_INVALID, /* 0xa2 */ FD_INVALID, /* 0xa3 */ FD_INVALID,
206 7866 : /* 0xa4 */ FD_VALID, /* 0xa5 */ FD_CHECK_JMP, /* 0xa6 */ FD_INVALID, /* 0xa7 */ FD_VALID,
207 7866 : /* 0xa8 */ FD_INVALID, /* 0xa9 */ FD_INVALID, /* 0xaa */ FD_INVALID, /* 0xab */ FD_INVALID,
208 7866 : /* 0xac */ FD_VALID, /* 0xad */ FD_CHECK_JMP, /* 0xae */ FD_INVALID, /* 0xaf */ FD_VALID,
209 7866 : /* 0xb0 */ FD_INVALID, /* 0xb1 */ FD_INVALID, /* 0xb2 */ FD_INVALID, /* 0xb3 */ FD_INVALID,
210 7866 : /* 0xb4 */ FD_VALID, /* 0xb5 */ FD_CHECK_JMP, /* 0xb6 */ FD_VALID, /* 0xb7 */ FD_VALID,
211 7866 : /* 0xb8 */ FD_INVALID, /* 0xb9 */ FD_INVALID, /* 0xba */ FD_INVALID, /* 0xbb */ FD_INVALID,
212 7866 : /* 0xbc */ FD_VALID, /* 0xbd */ FD_CHECK_JMP, /* 0xbe */ FD_VALID, /* 0xbf */ FD_VALID,
213 7866 : /* 0xc0 */ FD_INVALID, /* 0xc1 */ FD_INVALID, /* 0xc2 */ FD_INVALID, /* 0xc3 */ FD_INVALID,
214 7866 : /* 0xc4 */ FD_CHECK_SH32, /* 0xc5 */ FD_CHECK_JMP, /* 0xc6 */ FD_CHECK_DIV, /* 0xc7 */ FD_CHECK_SH64,
215 7866 : /* 0xc8 */ FD_INVALID, /* 0xc9 */ FD_INVALID, /* 0xca */ FD_INVALID, /* 0xcb */ FD_INVALID,
216 7866 : /* 0xcc */ FD_VALID, /* 0xcd */ FD_CHECK_JMP, /* 0xce */ FD_VALID, /* 0xcf */ FD_VALID,
217 7866 : /* 0xd0 */ FD_INVALID, /* 0xd1 */ FD_INVALID, /* 0xd2 */ FD_INVALID, /* 0xd3 */ FD_INVALID,
218 7866 : /* 0xd4 */ FD_INVALID, /* 0xd5 */ FD_CHECK_JMP, /* 0xd6 */ FD_CHECK_DIV, /* 0xd7 */ FD_INVALID,
219 7866 : /* 0xd8 */ FD_INVALID, /* 0xd9 */ FD_INVALID, /* 0xda */ FD_INVALID, /* 0xdb */ FD_INVALID,
220 7866 : /* 0xdc */ FD_CHECK_END, /* 0xdd */ FD_CHECK_JMP, /* 0xde */ FD_VALID, /* 0xdf */ FD_INVALID,
221 7866 : /* 0xe0 */ FD_INVALID, /* 0xe1 */ FD_INVALID, /* 0xe2 */ FD_INVALID, /* 0xe3 */ FD_INVALID,
222 7866 : /* 0xe4 */ FD_INVALID, /* 0xe5 */ FD_INVALID, /* 0xe6 */ FD_CHECK_DIV, /* 0xe7 */ FD_INVALID,
223 7866 : /* 0xe8 */ FD_INVALID, /* 0xe9 */ FD_INVALID, /* 0xea */ FD_INVALID, /* 0xeb */ FD_INVALID,
224 7866 : /* 0xec */ FD_INVALID, /* 0xed */ FD_INVALID, /* 0xee */ FD_VALID, /* 0xef */ FD_INVALID,
225 7866 : /* 0xf0 */ FD_INVALID, /* 0xf1 */ FD_INVALID, /* 0xf2 */ FD_INVALID, /* 0xf3 */ FD_INVALID,
226 7866 : /* 0xf4 */ FD_INVALID, /* 0xf5 */ FD_INVALID, /* 0xf6 */ FD_CHECK_DIV, /* 0xf7 */ FD_VALID,
227 7866 : /* 0xf8 */ FD_INVALID, /* 0xf9 */ FD_INVALID, /* 0xfa */ FD_INVALID, /* 0xfb */ FD_INVALID,
228 7866 : /* 0xfc */ FD_INVALID, /* 0xfd */ FD_INVALID, /* 0xfe */ FD_VALID, /* 0xff */ FD_INVALID,
229 7866 : };
230 :
231 : /* SIMD-0173: LDDW */
232 7866 : validation_map[ 0x18 ] = FD_VM_SBPF_ENABLE_LDDW(sbpf_version) ? FD_CHECK_LDQ : FD_INVALID;
233 7866 : validation_map[ 0xf7 ] = FD_VM_SBPF_ENABLE_LDDW(sbpf_version) ? FD_INVALID : FD_VALID; /* HOR64 */
234 :
235 : /* SIMD-0173: LE */
236 7866 : validation_map[ 0xd4 ] = FD_VM_SBPF_ENABLE_LE (sbpf_version) ? FD_CHECK_END : FD_INVALID;
237 :
238 : /* SIMD-0173: LDXW, STW, STXW */
239 7866 : validation_map[ 0x61 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_VALID;
240 7866 : validation_map[ 0x62 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
241 7866 : validation_map[ 0x63 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
242 7866 : validation_map[ 0x8c ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_VALID : FD_INVALID;
243 7866 : validation_map[ 0x87 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_VALID; /* VALID because it's NEG64 */
244 7866 : validation_map[ 0x8f ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_INVALID;
245 :
246 : /* SIMD-0173: LDXH, STH, STXH */
247 7866 : validation_map[ 0x69 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_VALID;
248 7866 : validation_map[ 0x6a ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
249 7866 : validation_map[ 0x6b ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
250 7866 : validation_map[ 0x3c ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_VALID : FD_VALID;
251 7866 : validation_map[ 0x37 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_CHECK_DIV;
252 7866 : validation_map[ 0x3f ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_VALID;
253 :
254 : /* SIMD-0173: LDXB, STB, STXB */
255 7866 : validation_map[ 0x71 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_VALID;
256 7866 : validation_map[ 0x72 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
257 7866 : validation_map[ 0x73 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
258 7866 : validation_map[ 0x2c ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_VALID : FD_VALID;
259 7866 : validation_map[ 0x27 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_VALID;
260 7866 : validation_map[ 0x2f ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_VALID;
261 :
262 : /* SIMD-0173: LDXDW, STDW, STXDW */
263 7866 : validation_map[ 0x79 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_VALID;
264 7866 : validation_map[ 0x7a ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
265 7866 : validation_map[ 0x7b ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_INVALID : FD_CHECK_ST;
266 7866 : validation_map[ 0x9c ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_VALID : FD_VALID;
267 7866 : validation_map[ 0x97 ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_CHECK_DIV;
268 7866 : validation_map[ 0x9f ] = FD_VM_SBPF_MOVE_MEMORY_IX_CLASSES(sbpf_version) ? FD_CHECK_ST : FD_VALID;
269 :
270 : /* SIMD-0173: CALLX */
271 7866 : validation_map[ 0x8d ] = FD_VM_SBPF_CALLX_USES_SRC_REG(sbpf_version) ? FD_CHECK_CALL_REG : FD_CHECK_CALL_REG_DEPR;
272 :
273 : /* SIMD-0174: MUL, DIV, MOD */
274 7866 : validation_map[ 0x24 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_INVALID : FD_VALID;
275 7866 : validation_map[ 0x34 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_INVALID : FD_CHECK_DIV;
276 7866 : validation_map[ 0x94 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_INVALID : FD_CHECK_DIV;
277 : /* note: 0x?c, 0x?7, 0x?f should not be overwritten because they're now load/store ix */
278 :
279 : /* SIMD-0174: NEG */
280 7866 : validation_map[ 0x84 ] = FD_VM_SBPF_ENABLE_NEG (sbpf_version) ? FD_VALID : FD_INVALID;
281 : /* note: 0x87 should not be overwritten because it was NEG64 and it becomes STW */
282 :
283 : /* SIMD-0174: MUL, DIV, MOD */
284 7866 : validation_map[ 0x36 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID; /* UHMUL64 */
285 7866 : validation_map[ 0x3e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
286 7866 : validation_map[ 0x46 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* UDIV32 */
287 7866 : validation_map[ 0x4e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
288 7866 : validation_map[ 0x56 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* UDIV64 */
289 7866 : validation_map[ 0x5e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
290 7866 : validation_map[ 0x66 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* UREM32 */
291 7866 : validation_map[ 0x6e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
292 7866 : validation_map[ 0x76 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* UREM64 */
293 7866 : validation_map[ 0x7e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
294 7866 : validation_map[ 0x86 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID; /* LMUL32 */
295 7866 : validation_map[ 0x8e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
296 7866 : validation_map[ 0x96 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID; /* LMUL64 */
297 7866 : validation_map[ 0x9e ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
298 7866 : validation_map[ 0xb6 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID; /* SHMUL64 */
299 7866 : validation_map[ 0xbe ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
300 7866 : validation_map[ 0xc6 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* SDIV32 */
301 7866 : validation_map[ 0xce ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
302 7866 : validation_map[ 0xd6 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* SDIV64 */
303 7866 : validation_map[ 0xde ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
304 7866 : validation_map[ 0xe6 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* SREM32 */
305 7866 : validation_map[ 0xee ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
306 7866 : validation_map[ 0xf6 ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_CHECK_DIV : FD_INVALID; /* SREM64 */
307 7866 : validation_map[ 0xfe ] = FD_VM_SBPF_ENABLE_PQR (sbpf_version) ? FD_VALID : FD_INVALID;
308 :
309 : /* SIMD-0178: static syscalls */
310 7866 : validation_map[ 0x85 ] = FD_VM_SBPF_STATIC_SYSCALLS (sbpf_version) ? FD_CHECK_CALL_IMM : FD_VALID;
311 7866 : validation_map[ 0x95 ] = FD_VM_SBPF_STATIC_SYSCALLS (sbpf_version) ? FD_CHECK_SYSCALL : FD_VALID;
312 7866 : validation_map[ 0x9d ] = FD_VM_SBPF_STATIC_SYSCALLS (sbpf_version) ? FD_VALID : FD_INVALID;
313 :
314 : /* FIXME: These checks are not necessary assuming fd_vm_t is populated by metadata
315 : generated in fd_sbpf_elf_peek (which performs these checks). But there is no guarantee, and
316 : this non-guarantee is (rightfully) exploited by the fuzz harnesses.
317 : Agave doesn't perform these checks explicitly due to Rust's guarantees */
318 7866 : if( FD_UNLIKELY( vm->text_sz / 8UL != vm->text_cnt ||
319 7866 : (const uchar *)vm->text < vm->rodata ||
320 7866 : (ulong)vm->text > (ulong)vm->text + vm->text_sz || /* Overflow chk */
321 7866 : (const uchar *)vm->text + vm->text_sz > vm->rodata + vm->rodata_sz ) )
322 0 : return FD_VM_ERR_BAD_TEXT;
323 :
324 7866 : if( FD_UNLIKELY( !fd_ulong_is_aligned( vm->text_sz, 8UL ) ) ) /* https://github.com/solana-labs/rbpf/blob/v0.8.0/src/verifier.rs#L109 */
325 0 : return FD_VM_TEXT_SZ_UNALIGNED;
326 :
327 7866 : if ( FD_UNLIKELY( vm->text_cnt == 0UL ) ) /* https://github.com/solana-labs/rbpf/blob/v0.8.0/src/verifier.rs#L112 */
328 0 : return FD_VM_ERR_EMPTY;
329 :
330 7866 : ulong function_start = 0UL;
331 7866 : ulong function_next = 0UL;
332 7866 : if( FD_VM_SBPF_STATIC_SYSCALLS(sbpf_version) ) {
333 0 : function_next = fd_sbpf_calldests_const_iter_init( vm->calldests );
334 0 : FD_TEST( function_next==0UL ); /* assert that the first function always starts at 0. */
335 0 : }
336 :
337 7866 : ulong const * text = vm->text;
338 7866 : ulong text_cnt = vm->text_cnt;
339 805424439 : for( ulong i=0UL; i<text_cnt; i++ ) {
340 805419027 : fd_sbpf_instr_t instr = fd_sbpf_instr( text[i] );
341 :
342 : /* Validate functions, stored in vm->calldests.
343 : https://github.com/anza-xyz/sbpf/blob/v0.11.1/src/verifier.rs#L253-L263
344 : At the start of a function, we check that the function ends with JA(0x05) or RETURN(0x9D).
345 : As a side effect, the range of the function is [function_start, function_next-1],
346 : used to validate jumps.
347 : Note that the first function always starts at 0, and similarly the last function
348 : always ends at text_cnt-1. */
349 805419027 : if( FD_UNLIKELY( FD_VM_SBPF_STATIC_SYSCALLS(sbpf_version) && i==function_next ) ) {
350 0 : function_start = function_next;
351 0 : function_next = fd_sbpf_calldests_const_iter_next( vm->calldests, function_start );
352 0 : if( fd_sbpf_calldests_const_iter_done( function_next ) ) {
353 0 : function_next = text_cnt;
354 0 : }
355 0 : fd_sbpf_instr_t end_instr = fd_sbpf_instr( text[function_next-1] );
356 0 : if( FD_UNLIKELY( end_instr.opcode.raw!=0x05 && end_instr.opcode.raw!=0x9D ) ) {
357 0 : return FD_VM_INVALID_FUNCTION;
358 0 : }
359 0 : }
360 :
361 805419027 : uchar validation_code = validation_map[ instr.opcode.raw ];
362 805419027 : switch( validation_code ) {
363 :
364 644336088 : case FD_VALID: break;
365 :
366 : /* Store ops are special because they allow dreg==r10.
367 : We use a special validation_code, used later in the
368 : "Check registers" section.
369 : But there's nothing to do at this time. */
370 10926 : case FD_CHECK_ST: break;
371 :
372 15951 : case FD_CHECK_JMP_V0: {
373 15951 : long jmp_dst = (long)i + (long)instr.offset + 1L;
374 15951 : if( FD_UNLIKELY( (jmp_dst<0) | (jmp_dst>=(long)text_cnt) ) ) return FD_VM_ERR_JMP_OUT_OF_BOUNDS;
375 : //FIXME: this shouldn't be here?
376 15813 : if( FD_UNLIKELY( fd_sbpf_instr( text[ jmp_dst ] ).opcode.raw==FD_SBPF_OP_ADDL_IMM ) ) return FD_VM_ERR_JMP_TO_ADDL_IMM;
377 15813 : break;
378 15813 : }
379 :
380 15813 : case FD_CHECK_JMP_V3: {
381 0 : long jmp_dst = (long)i + (long)instr.offset + 1L;
382 0 : if( FD_UNLIKELY( (jmp_dst<(long)function_start) | (jmp_dst>=(long)function_next) ) ) return FD_VM_ERR_JMP_OUT_OF_BOUNDS;
383 0 : break;
384 0 : }
385 :
386 96 : case FD_CHECK_END: {
387 96 : if( FD_UNLIKELY( !((instr.imm==16) | (instr.imm==32) | (instr.imm==64)) ) ) return FD_VM_ERR_INVALID_END_IMM;
388 78 : break;
389 96 : }
390 :
391 : /* https://github.com/solana-labs/rbpf/blob/b503a1867a9cfa13f93b4d99679a17fe219831de/src/verifier.rs#L244 */
392 3789 : case FD_CHECK_LDQ: {
393 : /* https://github.com/solana-labs/rbpf/blob/b503a1867a9cfa13f93b4d99679a17fe219831de/src/verifier.rs#L131 */
394 3789 : if( FD_UNLIKELY( (i+1UL)>=text_cnt ) ) return FD_VM_ERR_INCOMPLETE_LDQ;
395 :
396 : /* https://github.com/solana-labs/rbpf/blob/b503a1867a9cfa13f93b4d99679a17fe219831de/src/verifier.rs#L137-L139 */
397 3789 : fd_sbpf_instr_t addl_imm = fd_sbpf_instr( text[ i+1UL ] );
398 3789 : if( FD_UNLIKELY( addl_imm.opcode.raw!=FD_SBPF_OP_ADDL_IMM ) ) return FD_VM_ERR_LDQ_NO_ADDL_IMM;
399 :
400 : /* FIXME: SET A BIT MAP HERE OF ADDL_IMM TO DENOTE * AS FORBIDDEN
401 : BRANCH TARGETS OF CALL_REG?? */
402 :
403 3789 : i++; /* Skip the addl imm */
404 3789 : break;
405 3789 : }
406 :
407 64406970 : case FD_CHECK_DIV: {
408 64406970 : if( FD_UNLIKELY( instr.imm==0 ) ) return FD_VM_ERR_SIGFPE;
409 64406910 : break;
410 64406970 : }
411 :
412 64406910 : case FD_CHECK_SH32: {
413 48308280 : if( FD_UNLIKELY( instr.imm>=32 ) ) return FD_VM_SH_OVERFLOW;
414 48308250 : break;
415 48308280 : }
416 :
417 48334251 : case FD_CHECK_SH64: {
418 48334251 : if( FD_UNLIKELY( instr.imm>=64 ) ) return FD_VM_SH_OVERFLOW;
419 48334209 : break;
420 48334251 : }
421 :
422 : /* https://github.com/anza-xyz/sbpf/blob/v0.11.1/src/verifier.rs#L220 */
423 48334209 : case FD_CHECK_CALL_REG: {
424 21 : if( FD_UNLIKELY( instr.src_reg > 9 ) ) {
425 9 : return FD_VM_ERR_INVALID_REG;
426 9 : }
427 12 : break;
428 21 : }
429 1479 : case FD_CHECK_CALL_REG_DEPR: {
430 1479 : if( FD_UNLIKELY( instr.imm > 9 ) ) {
431 9 : return FD_VM_ERR_INVALID_REG;
432 9 : }
433 1470 : break;
434 1479 : }
435 :
436 : /* https://github.com/anza-xyz/sbpf/blob/v0.11.1/src/verifier.rs#L411-L418 */
437 1470 : case FD_CHECK_CALL_IMM: {
438 0 : ulong target_pc = (ulong)( fd_long_sat_add( (long)i, fd_long_sat_add( (long)(int)instr.imm, 1 ) ) );
439 0 : if( FD_UNLIKELY( target_pc>=text_cnt || !fd_sbpf_calldests_test( vm->calldests, target_pc ) ) ) {
440 0 : return FD_VM_INVALID_FUNCTION;
441 0 : }
442 0 : break;
443 0 : }
444 :
445 : /* https://github.com/anza-xyz/sbpf/blob/v0.11.1/src/verifier.rs#L423-L428 */
446 0 : case FD_CHECK_SYSCALL: {
447 : /* check active syscall */
448 0 : fd_sbpf_syscalls_t const * syscall = fd_sbpf_syscalls_query_const( vm->syscalls, (ulong)instr.imm, NULL );
449 0 : if( FD_UNLIKELY( !syscall ) ) {
450 0 : return FD_VM_INVALID_SYSCALL;
451 0 : }
452 0 : break;
453 0 : }
454 :
455 1176 : case FD_INVALID: default: return FD_VM_ERR_INVALID_OPCODE;
456 805419027 : }
457 :
458 : /* Check registers
459 : https://github.com/solana-labs/rbpf/blob/v0.8.5/src/verifier.rs#L177 */
460 :
461 : /* Source register */
462 805417545 : if( FD_UNLIKELY( instr.src_reg>10 ) ) return FD_VM_ERR_INVALID_SRC_REG;
463 :
464 : /* Special R10 register allowed for ADD64_IMM */
465 805417155 : if( instr.dst_reg==10U
466 805417155 : && FD_VM_SBPF_DYNAMIC_STACK_FRAMES( sbpf_version )
467 805417155 : && instr.opcode.raw == 0x07
468 805417155 : && ( instr.imm % FD_VM_SBPF_DYNAMIC_STACK_FRAMES_ALIGN )==0 )
469 9 : continue;
470 :
471 : /* Destination register. */
472 805417146 : if( FD_UNLIKELY( instr.dst_reg==10U && validation_code != FD_CHECK_ST ) ) return FD_VM_ERR_INVALID_DST_REG;
473 805416765 : if( FD_UNLIKELY( instr.dst_reg > 10U ) ) return FD_VM_ERR_INVALID_DST_REG;
474 805416765 : }
475 :
476 5412 : return FD_VM_SUCCESS;
477 7866 : }
478 :
479 : FD_FN_CONST ulong
480 447 : fd_vm_align( void ) {
481 447 : return FD_VM_ALIGN;
482 447 : }
483 :
484 : FD_FN_CONST ulong
485 219 : fd_vm_footprint( void ) {
486 219 : return FD_VM_FOOTPRINT;
487 219 : }
488 :
489 : void *
490 219 : fd_vm_new( void * shmem ) {
491 :
492 219 : if( FD_UNLIKELY( !shmem ) ) {
493 0 : FD_LOG_WARNING(( "NULL shmem" ));
494 0 : return NULL;
495 0 : }
496 :
497 219 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_vm_align() ) ) ) {
498 0 : FD_LOG_WARNING(( "misaligned shmem" ));
499 0 : return NULL;
500 0 : }
501 :
502 219 : fd_vm_t * vm = (fd_vm_t *)shmem;
503 219 : fd_memset( vm, 0, fd_vm_footprint() );
504 :
505 219 : FD_COMPILER_MFENCE();
506 219 : FD_VOLATILE( vm->magic ) = FD_VM_MAGIC;
507 219 : FD_COMPILER_MFENCE();
508 :
509 219 : return shmem;
510 219 : }
511 :
512 : fd_vm_t *
513 219 : fd_vm_join( void * shmem ) {
514 :
515 219 : if( FD_UNLIKELY( !shmem ) ) {
516 0 : FD_LOG_WARNING(( "NULL shmem" ));
517 0 : return NULL;
518 0 : }
519 :
520 219 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_vm_align() ) ) ) {
521 0 : FD_LOG_WARNING(( "misaligned shmem" ));
522 0 : return NULL;
523 0 : }
524 :
525 219 : fd_vm_t * vm = (fd_vm_t *)shmem;
526 :
527 219 : if( FD_UNLIKELY( vm->magic!=FD_VM_MAGIC ) ) {
528 0 : FD_LOG_WARNING(( "bad magic" ));
529 0 : return NULL;
530 0 : }
531 :
532 219 : return vm;
533 219 : }
534 :
535 : void *
536 9 : fd_vm_leave( fd_vm_t * vm ) {
537 :
538 9 : if( FD_UNLIKELY( !vm ) ) {
539 0 : FD_LOG_WARNING(( "NULL vm" ));
540 0 : return NULL;
541 0 : }
542 :
543 9 : return (void *)vm;
544 9 : }
545 :
546 : void *
547 9 : fd_vm_delete( void * shmem ) {
548 :
549 9 : if( FD_UNLIKELY( !shmem ) ) {
550 0 : FD_LOG_WARNING(( "NULL shmem" ));
551 0 : return NULL;
552 0 : }
553 :
554 9 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_vm_align() ) ) ) {
555 0 : FD_LOG_WARNING(( "misaligned shmem" ));
556 0 : return NULL;
557 0 : }
558 :
559 9 : fd_vm_t * vm = (fd_vm_t *)shmem;
560 :
561 9 : if( FD_UNLIKELY( vm->magic!=FD_VM_MAGIC ) ) {
562 0 : FD_LOG_WARNING(( "bad magic" ));
563 0 : return NULL;
564 0 : }
565 :
566 9 : FD_COMPILER_MFENCE();
567 9 : FD_VOLATILE( vm->magic ) = 0UL;
568 9 : FD_COMPILER_MFENCE();
569 :
570 9 : return (void *)vm;
571 9 : }
572 :
573 : fd_vm_t *
574 : fd_vm_init(
575 : fd_vm_t * vm,
576 : fd_exec_instr_ctx_t *instr_ctx,
577 : ulong heap_max,
578 : ulong entry_cu,
579 : uchar const * rodata,
580 : ulong rodata_sz,
581 : ulong const * text,
582 : ulong text_cnt,
583 : ulong text_off,
584 : ulong text_sz,
585 : ulong entry_pc,
586 : ulong * calldests,
587 : ulong sbpf_version,
588 : fd_sbpf_syscalls_t * syscalls,
589 : fd_vm_trace_t * trace,
590 : fd_sha256_t * sha,
591 : fd_vm_input_region_t * mem_regions,
592 : uint mem_regions_cnt,
593 : fd_vm_acc_region_meta_t * acc_region_metas,
594 : uchar is_deprecated,
595 : int direct_mapping,
596 7872 : int dump_syscall_to_pb ) {
597 :
598 7872 : if ( FD_UNLIKELY( vm == NULL ) ) {
599 0 : FD_LOG_WARNING(( "NULL vm" ));
600 0 : return NULL;
601 0 : }
602 :
603 7872 : if ( FD_UNLIKELY( vm->magic != FD_VM_MAGIC ) ) {
604 0 : FD_LOG_WARNING(( "bad magic" ));
605 0 : return NULL;
606 0 : }
607 :
608 7872 : if ( FD_UNLIKELY( heap_max > FD_VM_HEAP_MAX ) ) {
609 0 : FD_LOG_WARNING(( "heap_max > FD_VM_HEAP_MAX" ));
610 0 : return NULL;
611 0 : }
612 :
613 : /* We do support calldests==NULL for tests that do not require
614 : program execution, e.g. just testing some interpreter functionality
615 : or syscalls.
616 : However in v3, if calldests is specified, it must be a valid calldests.
617 : In particular, the bit 0 should be always set to 1.
618 : This property is derived from:
619 : https://github.com/anza-xyz/sbpf/blob/v0.11.1/src/elf.rs#L529
620 : and it's used by fd_vm_validate() */
621 7872 : if( FD_LIKELY( calldests && FD_VM_SBPF_STATIC_SYSCALLS(sbpf_version) ) ) {
622 0 : fd_sbpf_calldests_insert( calldests, 0 );
623 0 : }
624 :
625 : // Set the vm fields
626 7872 : vm->instr_ctx = instr_ctx;
627 7872 : vm->heap_max = heap_max;
628 7872 : vm->entry_cu = entry_cu;
629 7872 : vm->rodata = rodata;
630 7872 : vm->rodata_sz = rodata_sz;
631 7872 : vm->text = text;
632 7872 : vm->text_cnt = text_cnt;
633 7872 : vm->text_off = text_off;
634 7872 : vm->text_sz = text_sz;
635 7872 : vm->entry_pc = entry_pc;
636 7872 : vm->calldests = calldests;
637 7872 : vm->sbpf_version = sbpf_version;
638 7872 : vm->syscalls = syscalls;
639 7872 : vm->trace = trace;
640 7872 : vm->sha = sha;
641 7872 : vm->input_mem_regions = mem_regions;
642 7872 : vm->input_mem_regions_cnt = mem_regions_cnt;
643 7872 : vm->acc_region_metas = acc_region_metas;
644 7872 : vm->is_deprecated = is_deprecated;
645 7872 : vm->direct_mapping = direct_mapping;
646 7872 : vm->stack_frame_size = FD_VM_STACK_FRAME_SZ + ( direct_mapping ? 0UL : FD_VM_STACK_GUARD_SZ );
647 7872 : vm->segv_vaddr = ULONG_MAX;
648 7872 : vm->segv_access_type = 0;
649 7872 : vm->dump_syscall_to_pb = dump_syscall_to_pb;
650 :
651 : /* Unpack the configuration */
652 7872 : int err = fd_vm_setup_state_for_execution( vm );
653 7872 : if( FD_UNLIKELY( err != FD_VM_SUCCESS ) ) {
654 0 : return NULL;
655 0 : }
656 :
657 7872 : return vm;
658 7872 : }
659 :
660 : int
661 7872 : fd_vm_setup_state_for_execution( fd_vm_t * vm ) {
662 :
663 7872 : if ( FD_UNLIKELY( !vm ) ) {
664 0 : FD_LOG_WARNING(( "NULL vm" ));
665 0 : return FD_VM_ERR_INVAL;
666 0 : }
667 :
668 : /* Unpack input and rodata */
669 7872 : fd_vm_mem_cfg( vm );
670 :
671 : /* Initialize registers */
672 : /* FIXME: Zero out shadow, stack and heap here? */
673 7872 : fd_memset( vm->reg, 0, FD_VM_REG_MAX * sizeof(ulong) );
674 7872 : vm->reg[ 1] = FD_VM_MEM_MAP_INPUT_REGION_START;
675 : /* https://github.com/solana-labs/rbpf/blob/4ad935be45e5663be23b30cfc750b1ae1ad03c44/src/vm.rs#L326-L333 */
676 7872 : vm->reg[10] = FD_VM_MEM_MAP_STACK_REGION_START +
677 7872 : ( FD_VM_SBPF_DYNAMIC_STACK_FRAMES( vm->sbpf_version ) ? FD_VM_STACK_MAX : FD_VM_STACK_FRAME_SZ );
678 : /* Note: Agave uses r11 as pc, we don't */
679 :
680 : /* Set execution state */
681 7872 : vm->pc = vm->entry_pc;
682 7872 : vm->ic = 0UL;
683 7872 : vm->cu = vm->entry_cu;
684 7872 : vm->frame_cnt = 0UL;
685 :
686 7872 : vm->heap_sz = 0UL;
687 :
688 : /* Do NOT reset logs */
689 :
690 7872 : return FD_VM_SUCCESS;
691 7872 : }
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