77 lines
1.6 KiB
Raku
77 lines
1.6 KiB
Raku
#!/usr/bin/env perl
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push(@INC,"perlasm");
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require "x86asm.pl";
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&asm_init($ARGV[0],"x86cpuid");
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&function_begin("OPENSSL_ia32_cpuid");
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&xor ("edx","edx");
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&pushf ();
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&pop ("eax");
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&mov ("ecx","eax");
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&xor ("eax",1<<21);
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&push ("eax");
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&popf ();
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&pushf ();
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&pop ("eax");
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&xor ("ecx","eax");
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&bt ("ecx",21);
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&jnc (&label("nocpuid"));
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&mov ("eax",1);
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&cpuid ();
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&set_label("nocpuid");
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&mov ("eax","edx");
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&mov ("edx","ecx");
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&function_end("OPENSSL_ia32_cpuid");
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&external_label("OPENSSL_ia32cap_P");
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&function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
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&xor ("eax","eax");
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&xor ("edx","edx");
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&picmeup("ecx","OPENSSL_ia32cap_P");
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&bt (&DWP(0,"ecx"),4);
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&jnc (&label("notsc"));
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&rdtsc ();
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&set_label("notsc");
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&ret ();
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&function_end_B("OPENSSL_rdtsc");
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# This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host],
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# but it's safe to call it on any [supported] 32-bit platform...
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# Just check for [non-]zero return value...
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&function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
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&picmeup("ecx","OPENSSL_ia32cap_P");
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&bt (&DWP(0,"ecx"),4);
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&jnc (&label("nohalt")); # no TSC
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&data_word(0x9058900e); # push %cs; pop %eax
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&and ("eax",3);
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&jnz (&label("nohalt")); # not enough privileges
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&pushf ();
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&pop ("eax")
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&bt ("eax",9);
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&jnc (&label("nohalt")); # interrupts are disabled
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&rdtsc ();
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&push ("edx");
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&push ("eax");
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&halt ();
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&rdtsc ();
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&sub ("eax",&DWP(0,"esp"));
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&sbb ("edx",&DWP(4,"esp"));
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&add ("esp",8);
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&ret ();
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&set_label("nohalt");
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&xor ("eax","eax");
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&xor ("edx","edx");
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&ret ();
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&function_end_B("OPENSSL_instrument_halt");
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&initseg("OPENSSL_cpuid_setup");
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&asm_finish();
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