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| author | Alex Richardson <Alexander.Richardson@cl.cam.ac.uk> | 2021-03-16 16:09:39 +0000 |
|---|---|---|
| committer | Alex Richardson <Alexander.Richardson@cl.cam.ac.uk> | 2021-03-16 16:19:25 +0000 |
| commit | e22c803cbdcdb6565b9d8bfd6a1a2407e92e6246 (patch) | |
| tree | 183d3b5ab478ab6915a79e16b44474506e13e077 | |
| parent | 251bd0850e932e1cb36a77c5db3e55c2426f3577 (diff) | |
| download | sail-riscv-e22c803cbdcdb6565b9d8bfd6a1a2407e92e6246.zip sail-riscv-e22c803cbdcdb6565b9d8bfd6a1a2407e92e6246.tar.gz sail-riscv-e22c803cbdcdb6565b9d8bfd6a1a2407e92e6246.tar.bz2 | |
Check for overly large RVFI packets
| -rw-r--r-- | c_emulator/riscv_sim.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/c_emulator/riscv_sim.c b/c_emulator/riscv_sim.c index 71863cb..4fbeb07 100644 --- a/c_emulator/riscv_sim.c +++ b/c_emulator/riscv_sim.c @@ -683,6 +683,7 @@ static void get_and_send_rvfi_packet(packet_reader_fn *reader) { lbits packet; CREATE(lbits)(&packet); reader(&packet, UNIT); + /* Note: packet.len is the size in bits, not bytes. */ if (packet.len % 8 != 0) { fprintf(stderr, "RVFI-DII trace packet not byte aligned: %d\n", (int)packet.len); exit(1); @@ -692,6 +693,10 @@ static void get_and_send_rvfi_packet(packet_reader_fn *reader) { print_bits("packet = ", packet); fprintf(stderr, "Sending packet with length %zd... ", send_size); } + if (send_size > 4096) { + fprintf(stderr, "Unexpected large packet size (> 4KB): %zd\n", send_size); + exit(1); + } unsigned char bytes[send_size]; /* mpz_export might not write all of the null bytes */ memset(bytes, 0, sizeof(bytes)); |