1 //===- llvm/BinaryFormat/Magic.cpp - File magic identification --*- C++ -*-===//
9 #include "llvm/BinaryFormat/Magic.h"
30 static bool startswith(StringRef Magic, const char (&S)[N]) {  in startswith()  argument
31   return Magic.startswith(StringRef(S, N - 1));  in startswith()
34 /// Identify the magic in magic.
35 file_magic llvm::identify_magic(StringRef Magic) {  in identify_magic()  argument
36   if (Magic.size() < 4)  in identify_magic()
38   switch ((unsigned char)Magic[0]) {  in identify_magic()
41     if (startswith(Magic, "\0\0\xFF\xFF")) {  in identify_magic()
44       if (Magic.size() < MinSize)  in identify_magic()
47       const char *Start = Magic.data() + offsetof(COFF::BigObjHeader, UUID);  in identify_magic()
55     if (Magic.size() >= sizeof(COFF::WinResMagic) &&  in identify_magic()
56         memcmp(Magic.data(), COFF::WinResMagic, sizeof(COFF::WinResMagic)) == 0)  in identify_magic()
59     if (Magic[1] == 0)  in identify_magic()
61     if (startswith(Magic, "\0asm"))  in identify_magic()
68     if (startswith(Magic, "\x01\xDF"))  in identify_magic()
70     if (startswith(Magic, "\x01\xF7"))  in identify_magic()
75     if (startswith(Magic, "\xDE\xC0\x17\x0B"))  in identify_magic()
79     if (startswith(Magic, "BC\xC0\xDE"))  in identify_magic()
83     if (startswith(Magic, "!<arch>\n") || startswith(Magic, "!<thin>\n"))  in identify_magic()
88     if (startswith(Magic, "\177ELF") && Magic.size() >= 18) {  in identify_magic()
89       bool Data2MSB = Magic[5] == 2;  in identify_magic()
92       if (Magic[high] == 0) {  in identify_magic()
93         switch (Magic[low]) {  in identify_magic()
112     if (startswith(Magic, "\xCA\xFE\xBA\xBE") ||  in identify_magic()
113         startswith(Magic, "\xCA\xFE\xBA\xBF")) {  in identify_magic()
115       // See the Mach-O section in /usr/share/file/magic for details.  in identify_magic()
116       if (Magic.size() >= 8 && Magic[7] < 43)  in identify_magic()
121   // The two magic numbers for mach-o are:  in identify_magic()
128     if (startswith(Magic, "\xFE\xED\xFA\xCE") ||  in identify_magic()
129         startswith(Magic, "\xFE\xED\xFA\xCF")) {  in identify_magic()
132       if (Magic[3] == char(0xCE))  in identify_magic()
136       if (Magic.size() >= MinSize)  in identify_magic()
137         type = Magic[12] << 24 | Magic[13] << 12 | Magic[14] << 8 | Magic[15];  in identify_magic()
138     } else if (startswith(Magic, "\xCE\xFA\xED\xFE") ||  in identify_magic()
139                startswith(Magic, "\xCF\xFA\xED\xFE")) {  in identify_magic()
142       if (Magic[0] == char(0xCE))  in identify_magic()
146       if (Magic.size() >= MinSize)  in identify_magic()
147         type = Magic[15] << 24 | Magic[14] << 12 | Magic[13] << 8 | Magic[12];  in identify_magic()
184     if (Magic[1] == 0x01)  in identify_magic()
190     if (Magic[1] == 0x02)  in identify_magic()
196     if (startswith(Magic, "MZ") && Magic.size() >= 0x3c + 4) {  in identify_magic()
197       uint32_t off = read32le(Magic.data() + 0x3c);  in identify_magic()
199       if (Magic.substr(off).startswith(  in identify_magic()
203     if (Magic.startswith("Microsoft C/C++ MSF 7.00\r\n"))  in identify_magic()
205     if (startswith(Magic, "MDMP"))  in identify_magic()
210     if (Magic[1] == char(0x86) || Magic[1] == char(0xaa))  in identify_magic()
215     if (startswith(Magic, "--- !tapi") || startswith(Magic, "---\narchs:"))  in identify_magic()