secure/lib/libcrypto/asm/x86_64cpuid.s

   1
   2 .section        .init
   3         call    OPENSSL_cpuid_setup
   4
   5 .text
   6
   7 .globl  OPENSSL_atomic_add
   8 .type   OPENSSL_atomic_add,@function
   9 .align  16
  10 OPENSSL_atomic_add:
  11         movl    (%rdi),%eax
  12 .Lspin: leaq    (%rsi,%rax,1),%r8
  13 .byte   0xf0
  14         cmpxchgl        %r8d,(%rdi)
  15         jne     .Lspin
  16         movl    %r8d,%eax
  17 .byte   0x48,0x98
  18         .byte   0xf3,0xc3
  19 .size   OPENSSL_atomic_add,.-OPENSSL_atomic_add
  20
  21 .globl  OPENSSL_rdtsc
  22 .type   OPENSSL_rdtsc,@function
  23 .align  16
  24 OPENSSL_rdtsc:
  25         rdtsc
  26         shlq    $32,%rdx
  27         orq     %rdx,%rax
  28         .byte   0xf3,0xc3
  29 .size   OPENSSL_rdtsc,.-OPENSSL_rdtsc
  30
  31 .globl  OPENSSL_ia32_cpuid
  32 .type   OPENSSL_ia32_cpuid,@function
  33 .align  16
  34 OPENSSL_ia32_cpuid:
  35         movq    %rbx,%r8
  36
  37         xorl    %eax,%eax
  38         cpuid
  39         movl    %eax,%r11d
  40
  41         xorl    %eax,%eax
  42         cmpl    $1970169159,%ebx
  43         setne   %al
  44         movl    %eax,%r9d
  45         cmpl    $1231384169,%edx
  46         setne   %al
  47         orl     %eax,%r9d
  48         cmpl    $1818588270,%ecx
  49         setne   %al
  50         orl     %eax,%r9d
  51         jz      .Lintel
  52
  53         cmpl    $1752462657,%ebx
  54         setne   %al
  55         movl    %eax,%r10d
  56         cmpl    $1769238117,%edx
  57         setne   %al
  58         orl     %eax,%r10d
  59         cmpl    $1145913699,%ecx
  60         setne   %al
  61         orl     %eax,%r10d
  62         jnz     .Lintel
  63
  64
  65         movl    $2147483648,%eax
  66         cpuid
  67         cmpl    $2147483656,%eax
  68         jb      .Lintel
  69
  70         movl    $2147483656,%eax
  71         cpuid
  72         movzbq  %cl,%r10
  73         incq    %r10
  74
  75         movl    $1,%eax
  76         cpuid
  77         btl     $28,%edx
  78         jnc     .Ldone
  79         shrl    $16,%ebx
  80         cmpb    %r10b,%bl
  81         ja      .Ldone
  82         andl    $4026531839,%edx
  83         jmp     .Ldone
  84
  85 .Lintel:
  86         cmpl    $4,%r11d
  87         movl    $-1,%r10d
  88         jb      .Lnocacheinfo
  89
  90         movl    $4,%eax
  91         movl    $0,%ecx
  92         cpuid
  93         movl    %eax,%r10d
  94         shrl    $14,%r10d
  95         andl    $4095,%r10d
  96
  97 .Lnocacheinfo:
  98         movl    $1,%eax
  99         cpuid
 100         cmpl    $0,%r9d
 101         jne     .Lnotintel
 102         orl     $1048576,%edx
 103         andb    $15,%ah
 104         cmpb    $15,%ah
 105         je      .Lnotintel
 106         orl     $1073741824,%edx
 107 .Lnotintel:
 108         btl     $28,%edx
 109         jnc     .Ldone
 110         andl    $4026531839,%edx
 111         cmpl    $0,%r10d
 112         je      .Ldone
 113
 114         orl     $268435456,%edx
 115         shrl    $16,%ebx
 116         cmpb    $1,%bl
 117         ja      .Ldone
 118         andl    $4026531839,%edx
 119 .Ldone:
 120         shlq    $32,%rcx
 121         movl    %edx,%eax
 122         movq    %r8,%rbx
 123         orq     %rcx,%rax
 124         .byte   0xf3,0xc3
 125 .size   OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid
 126
 127 .globl  OPENSSL_cleanse
 128 .type   OPENSSL_cleanse,@function
 129 .align  16
 130 OPENSSL_cleanse:
 131         xorq    %rax,%rax
 132         cmpq    $15,%rsi
 133         jae     .Lot
 134         cmpq    $0,%rsi
 135         je      .Lret
 136 .Little:
 137         movb    %al,(%rdi)
 138         subq    $1,%rsi
 139         leaq    1(%rdi),%rdi
 140         jnz     .Little
 141 .Lret:
 142         .byte   0xf3,0xc3
 143 .align  16
 144 .Lot:
 145         testq   $7,%rdi
 146         jz      .Laligned
 147         movb    %al,(%rdi)
 148         leaq    -1(%rsi),%rsi
 149         leaq    1(%rdi),%rdi
 150         jmp     .Lot
 151 .Laligned:
 152         movq    %rax,(%rdi)
 153         leaq    -8(%rsi),%rsi
 154         testq   $-8,%rsi
 155         leaq    8(%rdi),%rdi
 156         jnz     .Laligned
 157         cmpq    $0,%rsi
 158         jne     .Little
 159         .byte   0xf3,0xc3
 160 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 161 .globl  OPENSSL_wipe_cpu
 162 .type   OPENSSL_wipe_cpu,@function
 163 .align  16
 164 OPENSSL_wipe_cpu:
 165         pxor    %xmm0,%xmm0
 166         pxor    %xmm1,%xmm1
 167         pxor    %xmm2,%xmm2
 168         pxor    %xmm3,%xmm3
 169         pxor    %xmm4,%xmm4
 170         pxor    %xmm5,%xmm5
 171         pxor    %xmm6,%xmm6
 172         pxor    %xmm7,%xmm7
 173         pxor    %xmm8,%xmm8
 174         pxor    %xmm9,%xmm9
 175         pxor    %xmm10,%xmm10
 176         pxor    %xmm11,%xmm11
 177         pxor    %xmm12,%xmm12
 178         pxor    %xmm13,%xmm13
 179         pxor    %xmm14,%xmm14
 180         pxor    %xmm15,%xmm15
 181         xorq    %rcx,%rcx
 182         xorq    %rdx,%rdx
 183         xorq    %rsi,%rsi
 184         xorq    %rdi,%rdi
 185         xorq    %r8,%r8
 186         xorq    %r9,%r9
 187         xorq    %r10,%r10
 188         xorq    %r11,%r11
 189         leaq    8(%rsp),%rax
 190         .byte   0xf3,0xc3
 191 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu