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  • Committer: Bazaar Package Importer
  • Author(s): Kurt Roeckx
  • Date: 2006-05-15 16:00:58 UTC
  • mto: (11.1.1 lenny)
  • mto: This revision was merged to the branch mainline in revision 6.
  • Revision ID: james.westby@ubuntu.com-20060515160058-pg6lnbkkpkwpdj2e
Tags: upstream-0.9.8b
Import upstream version 0.9.8b

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crypto/x86cpuid.pl
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        &ret    ();
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&function_end_B("OPENSSL_atomic_add");
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# This function can become handy under Win32 in situations when
 
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# we don't know which calling convention, __stdcall or __cdecl(*),
 
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# indirect callee is using. In C it can be deployed as
 
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#
 
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#ifdef OPENSSL_CPUID_OBJ
 
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#       type OPENSSL_indirect_call(void *f,...);
 
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#       ...
 
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#       OPENSSL_indirect_call(func,[up to $max arguments]);
 
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#endif
 
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#
 
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# (*)   it's designed to work even for __fastcall if number of
 
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#       arguments is 1 or 2!
 
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&function_begin_B("OPENSSL_indirect_call");
 
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        {
 
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        my $i,$max=7;           # $max has to be chosen as 4*n-1
 
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                                # in order to preserve eventual
 
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                                # stack alignment
 
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        &push   ("ebp");
 
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        &mov    ("ebp","esp");
 
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        &sub    ("esp",$max*4);
 
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        &mov    ("ecx",&DWP(12,"ebp"));
 
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        &mov    (&DWP(0,"esp"),"ecx");
 
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        &mov    ("edx",&DWP(16,"ebp"));
 
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        &mov    (&DWP(4,"esp"),"edx");
 
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        for($i=2;$i<$max;$i++)
 
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                {
 
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                # Some copies will be redundant/bogus...
 
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                &mov    ("eax",&DWP(12+$i*4,"ebp"));
 
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                &mov    (&DWP(0+$i*4,"esp"),"eax");
 
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                }
 
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        &call_ptr       (&DWP(8,"ebp"));# make the call...
 
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        &mov    ("esp","ebp");  # ... and just restore the stack pointer
 
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                                # without paying attention to what we called,
 
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                                # (__cdecl *func) or (__stdcall *one).
 
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        &pop    ("ebp");
 
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        &ret    ();
 
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        }
 
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&function_end_B("OPENSSL_indirect_call");
 
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&initseg("OPENSSL_cpuid_setup");
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&asm_finish();