diff options
Diffstat (limited to 'gold/int_encoding.cc')
| -rw-r--r-- | gold/int_encoding.cc | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/gold/int_encoding.cc b/gold/int_encoding.cc index 6d635ac..7887477 100644 --- a/gold/int_encoding.cc +++ b/gold/int_encoding.cc @@ -32,19 +32,20 @@ namespace gold { // Read an unsigned LEB128 number. Each byte contains 7 bits of // information, plus one bit saying whether the number continues or -// not. +// not. BYTE contains the first byte of the number, and is guaranteed +// to have the continuation bit set. uint64_t -read_unsigned_LEB_128(const unsigned char* buffer, size_t* len) +read_unsigned_LEB_128_x(const unsigned char* buffer, size_t* len, + unsigned char byte) { - uint64_t result = 0; - size_t num_read = 0; - unsigned int shift = 0; - unsigned char byte; + uint64_t result = static_cast<uint64_t>(byte & 0x7f); + size_t num_read = 1; + unsigned int shift = 7; do { - if (num_read >= 64 / 7) + if (num_read > 64 / 7 + 1) { gold_warning(_("Unusually large LEB128 decoded, " "debug information may be corrupted")); @@ -64,18 +65,20 @@ read_unsigned_LEB_128(const unsigned char* buffer, size_t* len) // Read a signed LEB128 number. These are like regular LEB128 // numbers, except the last byte may have a sign bit set. +// BYTE contains the first byte of the number, and is guaranteed +// to have the continuation bit set. int64_t -read_signed_LEB_128(const unsigned char* buffer, size_t* len) +read_signed_LEB_128_x(const unsigned char* buffer, size_t* len, + unsigned char byte) { - int64_t result = 0; - int shift = 0; - size_t num_read = 0; - unsigned char byte; + int64_t result = static_cast<uint64_t>(byte & 0x7f); + int shift = 7; + size_t num_read = 1; do { - if (num_read >= 64 / 7) + if (num_read > 64 / 7 + 1) { gold_warning(_("Unusually large LEB128 decoded, " "debug information may be corrupted")); |