Loading crypto/x86cpuid.pl +39 −0 Original line number Diff line number Diff line Loading @@ -153,6 +153,45 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } &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 (&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"); &initseg("OPENSSL_cpuid_setup"); &asm_finish(); Loading
crypto/x86cpuid.pl +39 −0 Original line number Diff line number Diff line Loading @@ -153,6 +153,45 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); } &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 (&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"); &initseg("OPENSSL_cpuid_setup"); &asm_finish();