| #!/usr/bin/env perl |
| |
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; |
| push(@INC, "${dir}perlasm", "perlasm"); |
| require "x86asm.pl"; |
| |
| &asm_init($ARGV[0],"x86cpuid"); |
| |
| for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } |
| |
| &function_begin("OPENSSL_ia32_cpuid"); |
| &xor ("edx","edx"); |
| &pushf (); |
| &pop ("eax"); |
| &mov ("ecx","eax"); |
| &xor ("eax",1<<21); |
| &push ("eax"); |
| &popf (); |
| &pushf (); |
| &pop ("eax"); |
| &xor ("ecx","eax"); |
| &xor ("eax","eax"); |
| &bt ("ecx",21); |
| &jnc (&label("nocpuid")); |
| &cpuid (); |
| &mov ("edi","eax"); # max value for standard query level |
| |
| &xor ("eax","eax"); |
| &cmp ("ebx",0x756e6547); # "Genu" |
| &setne (&LB("eax")); |
| &mov ("ebp","eax"); |
| &cmp ("edx",0x49656e69); # "ineI" |
| &setne (&LB("eax")); |
| &or ("ebp","eax"); |
| &cmp ("ecx",0x6c65746e); # "ntel" |
| &setne (&LB("eax")); |
| &or ("ebp","eax"); # 0 indicates Intel CPU |
| &jz (&label("intel")); |
| |
| &cmp ("ebx",0x68747541); # "Auth" |
| &setne (&LB("eax")); |
| &mov ("esi","eax"); |
| &cmp ("edx",0x69746E65); # "enti" |
| &setne (&LB("eax")); |
| &or ("esi","eax"); |
| &cmp ("ecx",0x444D4163); # "cAMD" |
| &setne (&LB("eax")); |
| &or ("esi","eax"); # 0 indicates AMD CPU |
| &jnz (&label("intel")); |
| |
| # AMD specific |
| &mov ("eax",0x80000000); |
| &cpuid (); |
| &cmp ("eax",0x80000001); |
| &jb (&label("intel")); |
| &mov ("esi","eax"); |
| &mov ("eax",0x80000001); |
| &cpuid (); |
| &or ("ebp","ecx"); |
| &and ("ebp",1<<11|1); # isolate XOP bit |
| &cmp ("esi",0x80000008); |
| &jb (&label("intel")); |
| |
| &mov ("eax",0x80000008); |
| &cpuid (); |
| &movz ("esi",&LB("ecx")); # number of cores - 1 |
| &inc ("esi"); # number of cores |
| |
| &mov ("eax",1); |
| &cpuid (); |
| &bt ("edx",28); |
| &jnc (&label("generic")); |
| &shr ("ebx",16); |
| &and ("ebx",0xff); |
| &cmp ("ebx","esi"); |
| &ja (&label("generic")); |
| &and ("edx",0xefffffff); # clear hyper-threading bit |
| &jmp (&label("generic")); |
| |
| &set_label("intel"); |
| &cmp ("edi",4); |
| &mov ("edi",-1); |
| &jb (&label("nocacheinfo")); |
| |
| &mov ("eax",4); |
| &mov ("ecx",0); # query L1D |
| &cpuid (); |
| &mov ("edi","eax"); |
| &shr ("edi",14); |
| &and ("edi",0xfff); # number of cores -1 per L1D |
| |
| &set_label("nocacheinfo"); |
| &mov ("eax",1); |
| &cpuid (); |
| &and ("edx",0xbfefffff); # force reserved bits #20, #30 to 0 |
| &cmp ("ebp",0); |
| &jne (&label("notintel")); |
| &or ("edx",1<<30); # set reserved bit#30 on Intel CPUs |
| &and (&HB("eax"),15); # familiy ID |
| &cmp (&HB("eax"),15); # P4? |
| &jne (&label("notintel")); |
| &or ("edx",1<<20); # set reserved bit#20 to engage RC4_CHAR |
| &set_label("notintel"); |
| &bt ("edx",28); # test hyper-threading bit |
| &jnc (&label("generic")); |
| &and ("edx",0xefffffff); |
| &cmp ("edi",0); |
| &je (&label("generic")); |
| |
| &or ("edx",0x10000000); |
| &shr ("ebx",16); |
| &cmp (&LB("ebx"),1); |
| &ja (&label("generic")); |
| &and ("edx",0xefffffff); # clear hyper-threading bit if not |
| |
| &set_label("generic"); |
| &and ("ebp",1<<11); # isolate AMD XOP flag |
| &and ("ecx",0xfffff7ff); # force 11th bit to 0 |
| &mov ("esi","edx"); |
| &or ("ebp","ecx"); # merge AMD XOP flag |
| |
| &bt ("ecx",27); # check OSXSAVE bit |
| &jnc (&label("clear_avx")); |
| &xor ("ecx","ecx"); |
| &data_byte(0x0f,0x01,0xd0); # xgetbv |
| &and ("eax",6); |
| &cmp ("eax",6); |
| &je (&label("done")); |
| &cmp ("eax",2); |
| &je (&label("clear_avx")); |
| &set_label("clear_xmm"); |
| &and ("ebp",0xfdfffffd); # clear AESNI and PCLMULQDQ bits |
| &and ("esi",0xfeffffff); # clear FXSR |
| &set_label("clear_avx"); |
| &and ("ebp",0xefffe7ff); # clear AVX, FMA and AMD XOP bits |
| &set_label("done"); |
| &mov ("eax","esi"); |
| &mov ("edx","ebp"); |
| &set_label("nocpuid"); |
| &function_end("OPENSSL_ia32_cpuid"); |
| |
| &external_label("OPENSSL_ia32cap_P"); |
| |
| &function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); |
| &xor ("eax","eax"); |
| &xor ("edx","edx"); |
| &picmeup("ecx","OPENSSL_ia32cap_P"); |
| &bt (&DWP(0,"ecx"),4); |
| &jnc (&label("notsc")); |
| &rdtsc (); |
| &set_label("notsc"); |
| &ret (); |
| &function_end_B("OPENSSL_rdtsc"); |
| |
| # This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host], |
| # but it's safe to call it on any [supported] 32-bit platform... |
| # Just check for [non-]zero return value... |
| &function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); |
| &picmeup("ecx","OPENSSL_ia32cap_P"); |
| &bt (&DWP(0,"ecx"),4); |
| &jnc (&label("nohalt")); # no TSC |
| |
| &data_word(0x9058900e); # push %cs; pop %eax |
| &and ("eax",3); |
| &jnz (&label("nohalt")); # not enough privileges |
| |
| &pushf (); |
| &pop ("eax") |
| &bt ("eax",9); |
| &jnc (&label("nohalt")); # interrupts are disabled |
| |
| &rdtsc (); |
| &push ("edx"); |
| &push ("eax"); |
| &halt (); |
| &rdtsc (); |
| |
| &sub ("eax",&DWP(0,"esp")); |
| &sbb ("edx",&DWP(4,"esp")); |
| &add ("esp",8); |
| &ret (); |
| |
| &set_label("nohalt"); |
| &xor ("eax","eax"); |
| &xor ("edx","edx"); |
| &ret (); |
| &function_end_B("OPENSSL_instrument_halt"); |
| |
| # Essentially there is only one use for this function. Under DJGPP: |
| # |
| # #include <go32.h> |
| # ... |
| # i=OPENSSL_far_spin(_dos_ds,0x46c); |
| # ... |
| # to obtain the number of spins till closest timer interrupt. |
| |
| &function_begin_B("OPENSSL_far_spin"); |
| &pushf (); |
| &pop ("eax") |
| &bt ("eax",9); |
| &jnc (&label("nospin")); # interrupts are disabled |
| |
| &mov ("eax",&DWP(4,"esp")); |
| &mov ("ecx",&DWP(8,"esp")); |
| &data_word (0x90d88e1e); # push %ds, mov %eax,%ds |
| &xor ("eax","eax"); |
| &mov ("edx",&DWP(0,"ecx")); |
| &jmp (&label("spin")); |
| |
| &align (16); |
| &set_label("spin"); |
| &inc ("eax"); |
| &cmp ("edx",&DWP(0,"ecx")); |
| &je (&label("spin")); |
| |
| &data_word (0x1f909090); # pop %ds |
| &ret (); |
| |
| &set_label("nospin"); |
| &xor ("eax","eax"); |
| &xor ("edx","edx"); |
| &ret (); |
| &function_end_B("OPENSSL_far_spin"); |
| |
| &function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD"); |
| &xor ("eax","eax"); |
| &xor ("edx","edx"); |
| &picmeup("ecx","OPENSSL_ia32cap_P"); |
| &mov ("ecx",&DWP(0,"ecx")); |
| &bt (&DWP(0,"ecx"),1); |
| &jnc (&label("no_x87")); |
| if ($sse2) { |
| &and ("ecx",1<<26|1<<24); # check SSE2 and FXSR bits |
| &cmp ("ecx",1<<26|1<<24); |
| &jne (&label("no_sse2")); |
| &pxor ("xmm0","xmm0"); |
| &pxor ("xmm1","xmm1"); |
| &pxor ("xmm2","xmm2"); |
| &pxor ("xmm3","xmm3"); |
| &pxor ("xmm4","xmm4"); |
| &pxor ("xmm5","xmm5"); |
| &pxor ("xmm6","xmm6"); |
| &pxor ("xmm7","xmm7"); |
| &set_label("no_sse2"); |
| } |
| # just a bunch of fldz to zap the fp/mm bank followed by finit... |
| &data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b); |
| &set_label("no_x87"); |
| &lea ("eax",&DWP(4,"esp")); |
| &ret (); |
| &function_end_B("OPENSSL_wipe_cpu"); |
| |
| &function_begin_B("OPENSSL_atomic_add"); |
| &mov ("edx",&DWP(4,"esp")); # fetch the pointer, 1st arg |
| &mov ("ecx",&DWP(8,"esp")); # fetch the increment, 2nd arg |
| &push ("ebx"); |
| &nop (); |
| &mov ("eax",&DWP(0,"edx")); |
| &set_label("spin"); |
| &lea ("ebx",&DWP(0,"eax","ecx")); |
| &nop (); |
| &data_word(0x1ab10ff0); # lock; cmpxchg %ebx,(%edx) # %eax is envolved and is always reloaded |
| &jne (&label("spin")); |
| &mov ("eax","ebx"); # OpenSSL expects the new value |
| &pop ("ebx"); |
| &ret (); |
| &function_end_B("OPENSSL_atomic_add"); |
| |
| # This function can become handy under Win32 in situations when |
| # we don't know which calling convention, __stdcall or __cdecl(*), |
| # indirect callee is using. In C it can be deployed as |
| # |
| #ifdef OPENSSL_CPUID_OBJ |
| # type OPENSSL_indirect_call(void *f,...); |
| # ... |
| # OPENSSL_indirect_call(func,[up to $max arguments]); |
| #endif |
| # |
| # (*) it's designed to work even for __fastcall if number of |
| # arguments is 1 or 2! |
| &function_begin_B("OPENSSL_indirect_call"); |
| { |
| my $i,$max=7; # $max has to be chosen as 4*n-1 |
| # in order to preserve eventual |
| # stack alignment |
| &push ("ebp"); |
| &mov ("ebp","esp"); |
| &sub ("esp",$max*4); |
| &mov ("ecx",&DWP(12,"ebp")); |
| &mov (&DWP(0,"esp"),"ecx"); |
| &mov ("edx",&DWP(16,"ebp")); |
| &mov (&DWP(4,"esp"),"edx"); |
| for($i=2;$i<$max;$i++) |
| { |
| # Some copies will be redundant/bogus... |
| &mov ("eax",&DWP(12+$i*4,"ebp")); |
| &mov (&DWP(0+$i*4,"esp"),"eax"); |
| } |
| &call_ptr (&DWP(8,"ebp"));# make the call... |
| &mov ("esp","ebp"); # ... and just restore the stack pointer |
| # without paying attention to what we called, |
| # (__cdecl *func) or (__stdcall *one). |
| &pop ("ebp"); |
| &ret (); |
| } |
| &function_end_B("OPENSSL_indirect_call"); |
| |
| &function_begin_B("OPENSSL_cleanse"); |
| &mov ("edx",&wparam(0)); |
| &mov ("ecx",&wparam(1)); |
| &xor ("eax","eax"); |
| &cmp ("ecx",7); |
| &jae (&label("lot")); |
| &cmp ("ecx",0); |
| &je (&label("ret")); |
| &set_label("little"); |
| &mov (&BP(0,"edx"),"al"); |
| &sub ("ecx",1); |
| &lea ("edx",&DWP(1,"edx")); |
| &jnz (&label("little")); |
| &set_label("ret"); |
| &ret (); |
| |
| &set_label("lot",16); |
| &test ("edx",3); |
| &jz (&label("aligned")); |
| &mov (&BP(0,"edx"),"al"); |
| &lea ("ecx",&DWP(-1,"ecx")); |
| &lea ("edx",&DWP(1,"edx")); |
| &jmp (&label("lot")); |
| &set_label("aligned"); |
| &mov (&DWP(0,"edx"),"eax"); |
| &lea ("ecx",&DWP(-4,"ecx")); |
| &test ("ecx",-4); |
| &lea ("edx",&DWP(4,"edx")); |
| &jnz (&label("aligned")); |
| &cmp ("ecx",0); |
| &jne (&label("little")); |
| &ret (); |
| &function_end_B("OPENSSL_cleanse"); |
| |
| &function_begin_B("OPENSSL_ia32_rdrand"); |
| &mov ("ecx",8); |
| &set_label("loop"); |
| &rdrand ("eax"); |
| &jc (&label("break")); |
| &loop (&label("loop")); |
| &set_label("break"); |
| &cmp ("eax",0); |
| &cmove ("eax","ecx"); |
| &ret (); |
| &function_end_B("OPENSSL_ia32_rdrand"); |
| |
| &initseg("OPENSSL_cpuid_setup"); |
| |
| &asm_finish(); |
