1 #!/usr/bin/env perl 2 3 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; 4 push(@INC, "${dir}perlasm", "perlasm"); 5 require "x86asm.pl"; 6 7 &asm_init($ARGV[0],"x86cpuid"); 8 9 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } 10 11 &function_begin("OPENSSL_ia32_cpuid"); 12 &xor ("edx","edx"); 13 &pushf (); 14 &pop ("eax"); 15 &mov ("ecx","eax"); 16 &xor ("eax",1<<21); 17 &push ("eax"); 18 &popf (); 19 &pushf (); 20 &pop ("eax"); 21 &xor ("ecx","eax"); 22 &bt ("ecx",21); 23 &jnc (&label("done")); 24 &xor ("eax","eax"); 25 &cpuid (); 26 &mov ("edi","eax"); # max value for standard query level 27 28 &xor ("eax","eax"); 29 &cmp ("ebx",0x756e6547); # "Genu" 30 &setne (&LB("eax")); 31 &mov ("ebp","eax"); 32 &cmp ("edx",0x49656e69); # "ineI" 33 &setne (&LB("eax")); 34 &or ("ebp","eax"); 35 &cmp ("ecx",0x6c65746e); # "ntel" 36 &setne (&LB("eax")); 37 &or ("ebp","eax"); # 0 indicates Intel CPU 38 &jz (&label("intel")); 39 40 &cmp ("ebx",0x68747541); # "Auth" 41 &setne (&LB("eax")); 42 &mov ("esi","eax"); 43 &cmp ("edx",0x69746E65); # "enti" 44 &setne (&LB("eax")); 45 &or ("esi","eax"); 46 &cmp ("ecx",0x444D4163); # "cAMD" 47 &setne (&LB("eax")); 48 &or ("esi","eax"); # 0 indicates AMD CPU 49 &jnz (&label("intel")); 50 51 # AMD specific 52 &mov ("eax",0x80000000); 53 &cpuid (); 54 &cmp ("eax",0x80000008); 55 &jb (&label("intel")); 56 57 &mov ("eax",0x80000008); 58 &cpuid (); 59 &movz ("esi",&LB("ecx")); # number of cores - 1 60 &inc ("esi"); # number of cores 61 62 &mov ("eax",1); 63 &cpuid (); 64 &bt ("edx",28); 65 &jnc (&label("done")); 66 &shr ("ebx",16); 67 &and ("ebx",0xff); 68 &cmp ("ebx","esi"); 69 &ja (&label("done")); 70 &and ("edx",0xefffffff); # clear hyper-threading bit 71 &jmp (&label("done")); 72 73 &set_label("intel"); 74 &cmp ("edi",4); 75 &mov ("edi",-1); 76 &jb (&label("nocacheinfo")); 77 78 &mov ("eax",4); 79 &mov ("ecx",0); # query L1D 80 &cpuid (); 81 &mov ("edi","eax"); 82 &shr ("edi",14); 83 &and ("edi",0xfff); # number of cores -1 per L1D 84 85 &set_label("nocacheinfo"); 86 &mov ("eax",1); 87 &cpuid (); 88 &cmp ("ebp",0); 89 &jne (&label("notP4")); 90 &and (&HB("eax"),15); # familiy ID 91 &cmp (&HB("eax"),15); # P4? 92 &jne (&label("notP4")); 93 &or ("edx",1<<20); # use reserved bit to engage RC4_CHAR 94 &set_label("notP4"); 95 &bt ("edx",28); # test hyper-threading bit 96 &jnc (&label("done")); 97 &and ("edx",0xefffffff); 98 &cmp ("edi",0); 99 &je (&label("done")); 100 101 &or ("edx",0x10000000); 102 &shr ("ebx",16); 103 &cmp (&LB("ebx"),1); 104 &ja (&label("done")); 105 &and ("edx",0xefffffff); # clear hyper-threading bit if not 106 &set_label("done"); 107 &mov ("eax","edx"); 108 &mov ("edx","ecx"); 109 &function_end("OPENSSL_ia32_cpuid"); 110 111 &external_label("OPENSSL_ia32cap_P"); 112 113 &function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); 114 &xor ("eax","eax"); 115 &xor ("edx","edx"); 116 &picmeup("ecx","OPENSSL_ia32cap_P"); 117 &bt (&DWP(0,"ecx"),4); 118 &jnc (&label("notsc")); 119 &rdtsc (); 120 &set_label("notsc"); 121 &ret (); 122 &function_end_B("OPENSSL_rdtsc"); 123 124 # This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host], 125 # but it's safe to call it on any [supported] 32-bit platform... 126 # Just check for [non-]zero return value... 127 &function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); 128 &picmeup("ecx","OPENSSL_ia32cap_P"); 129 &bt (&DWP(0,"ecx"),4); 130 &jnc (&label("nohalt")); # no TSC 131 132 &data_word(0x9058900e); # push %cs; pop %eax 133 &and ("eax",3); 134 &jnz (&label("nohalt")); # not enough privileges 135 136 &pushf (); 137 &pop ("eax") 138 &bt ("eax",9); 139 &jnc (&label("nohalt")); # interrupts are disabled 140 141 &rdtsc (); 142 &push ("edx"); 143 &push ("eax"); 144 &halt (); 145 &rdtsc (); 146 147 &sub ("eax",&DWP(0,"esp")); 148 &sbb ("edx",&DWP(4,"esp")); 149 &add ("esp",8); 150 &ret (); 151 152 &set_label("nohalt"); 153 &xor ("eax","eax"); 154 &xor ("edx","edx"); 155 &ret (); 156 &function_end_B("OPENSSL_instrument_halt"); 157 158 # Essentially there is only one use for this function. Under DJGPP: 159 # 160 # #include <go32.h> 161 # ... 162 # i=OPENSSL_far_spin(_dos_ds,0x46c); 163 # ... 164 # to obtain the number of spins till closest timer interrupt. 165 166 &function_begin_B("OPENSSL_far_spin"); 167 &pushf (); 168 &pop ("eax") 169 &bt ("eax",9); 170 &jnc (&label("nospin")); # interrupts are disabled 171 172 &mov ("eax",&DWP(4,"esp")); 173 &mov ("ecx",&DWP(8,"esp")); 174 &data_word (0x90d88e1e); # push %ds, mov %eax,%ds 175 &xor ("eax","eax"); 176 &mov ("edx",&DWP(0,"ecx")); 177 &jmp (&label("spin")); 178 179 &align (16); 180 &set_label("spin"); 181 &inc ("eax"); 182 &cmp ("edx",&DWP(0,"ecx")); 183 &je (&label("spin")); 184 185 &data_word (0x1f909090); # pop %ds 186 &ret (); 187 188 &set_label("nospin"); 189 &xor ("eax","eax"); 190 &xor ("edx","edx"); 191 &ret (); 192 &function_end_B("OPENSSL_far_spin"); 193 194 &function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); 195 &xor ("eax","eax"); 196 &xor ("edx","edx"); 197 &picmeup("ecx","OPENSSL_ia32cap_P"); 198 &mov ("ecx",&DWP(0,"ecx")); 199 &bt (&DWP(0,"ecx"),1); 200 &jnc (&label("no_x87")); 201 if ($sse2) { 202 &bt (&DWP(0,"ecx"),26); 203 &jnc (&label("no_sse2")); 204 &pxor ("xmm0","xmm0"); 205 &pxor ("xmm1","xmm1"); 206 &pxor ("xmm2","xmm2"); 207 &pxor ("xmm3","xmm3"); 208 &pxor ("xmm4","xmm4"); 209 &pxor ("xmm5","xmm5"); 210 &pxor ("xmm6","xmm6"); 211 &pxor ("xmm7","xmm7"); 212 &set_label("no_sse2"); 213 } 214 # just a bunch of fldz to zap the fp/mm bank followed by finit... 215 &data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b); 216 &set_label("no_x87"); 217 &lea ("eax",&DWP(4,"esp")); 218 &ret (); 219 &function_end_B("OPENSSL_wipe_cpu"); 220 221 &function_begin_B("OPENSSL_atomic_add"); 222 &mov ("edx",&DWP(4,"esp")); # fetch the pointer, 1st arg 223 &mov ("ecx",&DWP(8,"esp")); # fetch the increment, 2nd arg 224 &push ("ebx"); 225 &nop (); 226 &mov ("eax",&DWP(0,"edx")); 227 &set_label("spin"); 228 &lea ("ebx",&DWP(0,"eax","ecx")); 229 &nop (); 230 &data_word(0x1ab10ff0); # lock; cmpxchg %ebx,(%edx) # %eax is envolved and is always reloaded 231 &jne (&label("spin")); 232 &mov ("eax","ebx"); # OpenSSL expects the new value 233 &pop ("ebx"); 234 &ret (); 235 &function_end_B("OPENSSL_atomic_add"); 236 237 # This function can become handy under Win32 in situations when 238 # we don't know which calling convention, __stdcall or __cdecl(*), 239 # indirect callee is using. In C it can be deployed as 240 # 241 #ifdef OPENSSL_CPUID_OBJ 242 # type OPENSSL_indirect_call(void *f,...); 243 # ... 244 # OPENSSL_indirect_call(func,[up to $max arguments]); 245 #endif 246 # 247 # (*) it's designed to work even for __fastcall if number of 248 # arguments is 1 or 2! 249 &function_begin_B("OPENSSL_indirect_call"); 250 { 251 my $i,$max=7; # $max has to be chosen as 4*n-1 252 # in order to preserve eventual 253 # stack alignment 254 &push ("ebp"); 255 &mov ("ebp","esp"); 256 &sub ("esp",$max*4); 257 &mov ("ecx",&DWP(12,"ebp")); 258 &mov (&DWP(0,"esp"),"ecx"); 259 &mov ("edx",&DWP(16,"ebp")); 260 &mov (&DWP(4,"esp"),"edx"); 261 for($i=2;$i<$max;$i++) 262 { 263 # Some copies will be redundant/bogus... 264 &mov ("eax",&DWP(12+$i*4,"ebp")); 265 &mov (&DWP(0+$i*4,"esp"),"eax"); 266 } 267 &call_ptr (&DWP(8,"ebp"));# make the call... 268 &mov ("esp","ebp"); # ... and just restore the stack pointer 269 # without paying attention to what we called, 270 # (__cdecl *func) or (__stdcall *one). 271 &pop ("ebp"); 272 &ret (); 273 } 274 &function_end_B("OPENSSL_indirect_call"); 275 276 &function_begin_B("OPENSSL_cleanse"); 277 &mov ("edx",&wparam(0)); 278 &mov ("ecx",&wparam(1)); 279 &xor ("eax","eax"); 280 &cmp ("ecx",7); 281 &jae (&label("lot")); 282 &cmp ("ecx",0); 283 &je (&label("ret")); 284 &set_label("little"); 285 &mov (&BP(0,"edx"),"al"); 286 &sub ("ecx",1); 287 &lea ("edx",&DWP(1,"edx")); 288 &jnz (&label("little")); 289 &set_label("ret"); 290 &ret (); 291 292 &set_label("lot",16); 293 &test ("edx",3); 294 &jz (&label("aligned")); 295 &mov (&BP(0,"edx"),"al"); 296 &lea ("ecx",&DWP(-1,"ecx")); 297 &lea ("edx",&DWP(1,"edx")); 298 &jmp (&label("lot")); 299 &set_label("aligned"); 300 &mov (&DWP(0,"edx"),"eax"); 301 &lea ("ecx",&DWP(-4,"ecx")); 302 &test ("ecx",-4); 303 &lea ("edx",&DWP(4,"edx")); 304 &jnz (&label("aligned")); 305 &cmp ("ecx",0); 306 &jne (&label("little")); 307 &ret (); 308 &function_end_B("OPENSSL_cleanse"); 309 310 &initseg("OPENSSL_cpuid_setup"); 311 312 &asm_finish(); 313
