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| author | Andy Polyakov <appro@openssl.org> | 2005-12-03 11:56:55 +0000 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2005-12-03 11:56:55 +0000 |
| commit | 061bebc0d8889c93cb9a067679a7d675d7522929 (patch) | |
| tree | 23e464d5b2440f24870b01e7d8b0ad6437181827 /crypto/x86cpuid.pl | |
| parent | 802e1d692bd9c2019894d2d5a6064d46ec0a4da3 (diff) | |
| download | openssl-061bebc0d8889c93cb9a067679a7d675d7522929.zip openssl-061bebc0d8889c93cb9a067679a7d675d7522929.tar.gz openssl-061bebc0d8889c93cb9a067679a7d675d7522929.tar.bz2 | |
x86cpuid.pl update.
Diffstat (limited to 'crypto/x86cpuid.pl')
| -rw-r--r-- | crypto/x86cpuid.pl | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl index 4a58651..d4066e8 100644 --- a/crypto/x86cpuid.pl +++ b/crypto/x86cpuid.pl @@ -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(); |