diff options
Diffstat (limited to 'src/crypto/cpu-x86-asm.pl')
| -rw-r--r-- | src/crypto/cpu-x86-asm.pl | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/src/crypto/cpu-x86-asm.pl b/src/crypto/cpu-x86-asm.pl new file mode 100644 index 0000000..319c436 --- /dev/null +++ b/src/crypto/cpu-x86-asm.pl @@ -0,0 +1,334 @@ +#!/usr/bin/env perl + +$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; +push(@INC, "${dir}perlasm", "perlasm"); +require "x86asm.pl"; + +&asm_init($ARGV[0],"crypto/cpu-x86-asm"); + +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")); + &mov ("esi",&wparam(0)); + &mov (&DWP(8,"esi"),"eax"); # clear 3rd word + &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); + &xor ("ecx","ecx"); + &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",7); + &jb (&label("cacheinfo")); + + &mov ("esi",&wparam(0)); + &mov ("eax",7); + &xor ("ecx","ecx"); + &cpuid (); + &mov (&DWP(8,"esi"),"ebx"); + +&set_label("cacheinfo"); + &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); + &xor ("ecx","ecx"); + &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 +&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 + &mov ("edi",&wparam(0)); + &and (&DWP(8,"edi"),0xffffffdf); # clear AVX2 +&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 $max arguments]); +#endif +# +# (*) it's designed to work even for __fastcall if number of +# arguments is 1 or 2! +&function_begin_B("OPENSSL_indirect_call"); + { + my ($max,$i)=(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_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"); + +&hidden("OPENSSL_ia32cap_P"); + +&asm_finish(); |