T0b1/test-repo
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

decode: Don't fall back to memory encoding with 72-table

Browse Source
This commit is contained in:
Alexis Engelke
2020-06-17 20:18:26 +02:00
parent f978785df3
commit ab5e0c67c1
2 changed files with 116 additions and 116 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
decode.c
View File

@@ -371,19 +371,10 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
// Then, walk through ModR/M-encoded opcode extensions.
if ((kind == ENTRY_TABLE8 || kind == ENTRY_TABLE72) && LIKELY(off < len))
{
uint16_t entry = 0;
if (kind == ENTRY_TABLE72 && (buffer[off] & 0xc0) == 0xc0)
{
entry = table[buffer[off] - 0xb8];
if ((entry & ENTRY_MASK) != ENTRY_NONE)
off++;
else
entry = table[(buffer[off] >> 3) & 7];
}
ENTRY_UNPACK(table, kind, table[buffer[off++] - 0xb8]);
else
entry = table[(buffer[off] >> 3) & 7];
ENTRY_UNPACK(table, kind, entry);
ENTRY_UNPACK(table, kind, table[(buffer[off] >> 3) & 7]);
}
// Handle mandatory prefixes (which behave like an opcode ext.).