x86_64-mont5.pl: add missing Win64 support.

diff --git a/crypto/bn/asm/x86_64-mont5.pl b/crypto/bn/asm/x86_64-mont5.pl
index b7b1ef616112f5c38feeb73d835f48aaa83ee38e..fe335dfd44eb7314d326f35736ffece568bbb483 100755 (executable)
--- a/crypto/bn/asm/x86_64-mont5.pl
+++ b/crypto/bn/asm/x86_64-mont5.pl
@@ -64,6 +64,7 @@ bn_mul_mont_gather5:
 
 .align 16
 .Lmul_enter:
+       mov     ${num}d,${num}d
        mov     `($win64?56:8)`(%rsp),%r10d     # load 7th argument
        push    %rbx
        push    %rbp
@@ -71,10 +72,16 @@ bn_mul_mont_gather5:
        push    %r13
        push    %r14
        push    %r15
-
-       mov     ${num}d,${num}d
-       lea     2($num),%r11
+___
+$code.=<<___ if ($win64);
+       lea     -0x28(%rsp),%rsp
+       movaps  %xmm6,(%rsp)
+       movaps  %xmm7,0x10(%rsp)
+.Lmul_alloca:
+___
+$code.=<<___;
        mov     %rsp,%rax
+       lea     2($num),%r11
        neg     %r11
        lea     (%rsp,%r11,8),%rsp      # tp=alloca(8*(num+2))
        and     \$-1024,%rsp            # minimize TLB usage
@@ -313,6 +320,13 @@ $code.=<<___;
 
        mov     8(%rsp,$num,8),%rsi     # restore %rsp
        mov     \$1,%rax
+___
+$code.=<<___ if ($win64);
+       movaps  (%rsi),%xmm6
+       movaps  0x10(%rsi),%xmm7
+       lea     0x28(%rsi),%rsi
+___
+$code.=<<___;
        mov     (%rsi),%r15
        mov     8(%rsi),%r14
        mov     16(%rsi),%r13
@@ -332,6 +346,7 @@ $code.=<<___;
 .align 16
 bn_mul4x_mont_gather5:
 .Lmul4x_enter:
+       mov     ${num}d,${num}d
        mov     `($win64?56:8)`(%rsp),%r10d     # load 7th argument
        push    %rbx
        push    %rbp
@@ -339,10 +354,16 @@ bn_mul4x_mont_gather5:
        push    %r13
        push    %r14
        push    %r15
-
-       mov     ${num}d,${num}d
+___
+$code.=<<___ if ($win64);
+       lea     -0x28(%rsp),%rsp
+       movaps  %xmm6,(%rsp)
+       movaps  %xmm7,0x10(%rsp)
+.Lmul4x_alloca:
+___
+$code.=<<___;
+       mov     %rsp,%rax
        lea     4($num),%r11
-       mov     %rsp,%rax               # !!!!
        neg     %r11
        lea     (%rsp,%r11,8),%rsp      # tp=alloca(8*(num+4))
        and     \$-1024,%rsp            # minimize TLB usage
@@ -787,6 +808,13 @@ ___
 $code.=<<___;
        mov     8(%rsp,$num,8),%rsi     # restore %rsp
        mov     \$1,%rax
+___
+$code.=<<___ if ($win64);
+       movaps  (%rsi),%xmm6
+       movaps  0x10(%rsi),%xmm7
+       lea     0x28(%rsi),%rsi
+___
+$code.=<<___;
        mov     (%rsi),%r15
        mov     8(%rsi),%r14
        mov     16(%rsi),%r13
@@ -828,6 +856,142 @@ $code.=<<___;
 .asciz "Montgomery Multiplication with scatter/gather for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
 ___
 
+# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
+#              CONTEXT *context,DISPATCHER_CONTEXT *disp)
+if ($win64) {
+$rec="%rcx";
+$frame="%rdx";
+$context="%r8";
+$disp="%r9";
+
+$code.=<<___;
+.extern        __imp_RtlVirtualUnwind
+.type  mul_handler,\@abi-omnipotent
+.align 16
+mul_handler:
+       push    %rsi
+       push    %rdi
+       push    %rbx
+       push    %rbp
+       push    %r12
+       push    %r13
+       push    %r14
+       push    %r15
+       pushfq
+       sub     \$64,%rsp
+
+       mov     120($context),%rax      # pull context->Rax
+       mov     248($context),%rbx      # pull context->Rip
+
+       mov     8($disp),%rsi           # disp->ImageBase
+       mov     56($disp),%r11          # disp->HandlerData
+
+       mov     0(%r11),%r10d           # HandlerData[0]
+       lea     (%rsi,%r10),%r10        # end of prologue label
+       cmp     %r10,%rbx               # context->Rip<end of prologue label
+       jb      .Lcommon_seh_tail
+
+       lea     `40+48`(%rax),%rax
+
+       mov     4(%r11),%r10d           # HandlerData[1]
+       lea     (%rsi,%r10),%r10        # end of alloca label
+       cmp     %r10,%rbx               # context->Rip<end of alloca label
+       jb      .Lcommon_seh_tail
+
+       mov     152($context),%rax      # pull context->Rsp
+
+       mov     8(%r11),%r10d           # HandlerData[2]
+       lea     (%rsi,%r10),%r10        # epilogue label
+       cmp     %r10,%rbx               # context->Rip>=epilogue label
+       jae     .Lcommon_seh_tail
+
+       mov     192($context),%r10      # pull $num
+       mov     8(%rax,%r10,8),%rax     # pull saved stack pointer
+
+       movaps  (%rax),%xmm0
+       movaps  16(%rax),%xmm1
+       lea     `40+48`(%rax),%rax
+
+       mov     -8(%rax),%rbx
+       mov     -16(%rax),%rbp
+       mov     -24(%rax),%r12
+       mov     -32(%rax),%r13
+       mov     -40(%rax),%r14
+       mov     -48(%rax),%r15
+       mov     %rbx,144($context)      # restore context->Rbx
+       mov     %rbp,160($context)      # restore context->Rbp
+       mov     %r12,216($context)      # restore context->R12
+       mov     %r13,224($context)      # restore context->R13
+       mov     %r14,232($context)      # restore context->R14
+       mov     %r15,240($context)      # restore context->R15
+       movups  %xmm0,512($context)     # restore context->Xmm6
+       movups  %xmm1,528($context)     # restore context->Xmm7
+
+.Lcommon_seh_tail:
+       mov     8(%rax),%rdi
+       mov     16(%rax),%rsi
+       mov     %rax,152($context)      # restore context->Rsp
+       mov     %rsi,168($context)      # restore context->Rsi
+       mov     %rdi,176($context)      # restore context->Rdi
+
+       mov     40($disp),%rdi          # disp->ContextRecord
+       mov     $context,%rsi           # context
+       mov     \$154,%ecx              # sizeof(CONTEXT)
+       .long   0xa548f3fc              # cld; rep movsq
+
+       mov     $disp,%rsi
+       xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
+       mov     8(%rsi),%rdx            # arg2, disp->ImageBase
+       mov     0(%rsi),%r8             # arg3, disp->ControlPc
+       mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
+       mov     40(%rsi),%r10           # disp->ContextRecord
+       lea     56(%rsi),%r11           # &disp->HandlerData
+       lea     24(%rsi),%r12           # &disp->EstablisherFrame
+       mov     %r10,32(%rsp)           # arg5
+       mov     %r11,40(%rsp)           # arg6
+       mov     %r12,48(%rsp)           # arg7
+       mov     %rcx,56(%rsp)           # arg8, (NULL)
+       call    *__imp_RtlVirtualUnwind(%rip)
+
+       mov     \$1,%eax                # ExceptionContinueSearch
+       add     \$64,%rsp
+       popfq
+       pop     %r15
+       pop     %r14
+       pop     %r13
+       pop     %r12
+       pop     %rbp
+       pop     %rbx
+       pop     %rdi
+       pop     %rsi
+       ret
+.size  mul_handler,.-mul_handler
+
+.section       .pdata
+.align 4
+       .rva    .LSEH_begin_bn_mul_mont_gather5
+       .rva    .LSEH_end_bn_mul_mont_gather5
+       .rva    .LSEH_info_bn_mul_mont_gather5
+
+       .rva    .LSEH_begin_bn_mul4x_mont_gather5
+       .rva    .LSEH_end_bn_mul4x_mont_gather5
+       .rva    .LSEH_info_bn_mul4x_mont_gather5
+
+.section       .xdata
+.align 8
+.LSEH_info_bn_mul_mont_gather5:
+       .byte   9,0,0,0
+       .rva    mul_handler
+       .rva    .Lmul_alloca,.Lmul_body,.Lmul_epilogue          # HandlerData[]
+.align 8
+.LSEH_info_bn_mul4x_mont_gather5:
+       .byte   9,0,0,0
+       .rva    mul_handler
+       .rva    .Lmul4x_alloca,.Lmul4x_body,.Lmul4x_epilogue    # HandlerData[]
+.align 8
+___
+}
+
 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
 
 print $code;