x86_64-gf2m.pl: add Win64 SEH.

diff --git a/crypto/bn/asm/x86_64-gf2m.pl b/crypto/bn/asm/x86_64-gf2m.pl
index dfbb17772c7b2efac63ff54359f84bcc102464db..1658acbbddd61c3de50b4867d79f7d337201971e 100644 (file)
--- a/crypto/bn/asm/x86_64-gf2m.pl
+++ b/crypto/bn/asm/x86_64-gf2m.pl
@@ -153,6 +153,7 @@ $code.=<<___;
 
        add     \$128+8,%rsp
        ret
+.Lend_mul_1x1:
 .size  _mul_1x1,.-_mul_1x1
 ___
 
@@ -167,7 +168,7 @@ $code.=<<___;
 bn_GF2m_mul_2x2:
        mov     OPENSSL_ia32cap_P(%rip),%rax
        bt      \$33,%rax
-       jnc     .Lvanilla
+       jnc     .Lvanilla_mul_2x2
 
        movq            $a1,%xmm0
        movq            $b1,%xmm1
@@ -188,7 +189,7 @@ $code.=<<___;
        pclmulqdq       \$0,%xmm3,%xmm2 # a0·b0
        pclmulqdq       \$0,%xmm5,%xmm4 # (a0+a1)·(b0+b1)
        xorps           %xmm0,%xmm4
-       xorps           %xmm2,%xmm4
+       xorps           %xmm2,%xmm4     # (a0+a1)·(b0+b1)-a0·b0-a1·b1
        movdqa          %xmm4,%xmm5
        pslldq          \$8,%xmm4
        psrldq          \$8,%xmm5
@@ -199,7 +200,7 @@ $code.=<<___;
        ret
 
 .align 16
-.Lvanilla:
+.Lvanilla_mul_2x2:
        lea     -8*17(%rsp),%rsp
 ___
 $code.=<<___ if ($win64);
@@ -213,7 +214,7 @@ $code.=<<___;
        mov     %r12,8*12(%rsp)
        mov     %rbp,8*13(%rsp)
        mov     %rbx,8*14(%rsp)
-.Lbody:
+.Lbody_mul_2x2:
        mov     $rp,32(%rsp)            # save the arguments
        mov     $a1,40(%rsp)
        mov     $a0,48(%rsp)
@@ -272,9 +273,116 @@ ___
 $code.=<<___;
        lea     8*17(%rsp),%rsp
        ret
+.Lend_mul_2x2:
 .size  bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
 .asciz "GF(2^m) Multiplication for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
+.align 16
+___
+
+# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
+#               CONTEXT *context,DISPATCHER_CONTEXT *disp)
+if ($win64) {
+$rec="%rcx";
+$frame="%rdx";
+$context="%r8";
+$disp="%r9";
+
+$code.=<<___;
+.extern __imp_RtlVirtualUnwind
+
+.type  se_handler,\@abi-omnipotent
+.align 16
+se_handler:
+       push    %rsi
+       push    %rdi
+       push    %rbx
+       push    %rbp
+       push    %r12
+       push    %r13
+       push    %r14
+       push    %r15
+       pushfq
+       sub     \$64,%rsp
+
+       mov     152($context),%rax      # pull context->Rsp
+       mov     248($context),%rbx      # pull context->Rip
+
+       lea     .Lbody_mul_2x2(%rip),%r10
+       cmp     %r10,%rbx               # context->Rip<"prologue" label
+       jb      .Lin_prologue
+
+       mov     8*10(%rax),%r14         # mimic epilogue
+       mov     8*11(%rax),%r13
+       mov     8*12(%rax),%r12
+       mov     8*13(%rax),%rbp
+       mov     8*14(%rax),%rbx
+       mov     8*15(%rax),%rdi
+       mov     8*16(%rax),%rsi
+
+       mov     %rbx,144($context)      # restore context->Rbx
+       mov     %rbp,160($context)      # restore context->Rbp
+       mov     %rsi,168($context)      # restore context->Rsi
+       mov     %rdi,176($context)      # restore context->Rdi
+       mov     %r12,216($context)      # restore context->R12
+       mov     %r13,224($context)      # restore context->R13
+       mov     %r14,232($context)      # restore context->R14
+
+.Lin_prologue:
+       lea     8*17(%rax),%rax
+       mov     %rax,152($context)      # restore context->Rsp
+
+       mov     40($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  se_handler,.-se_handler
+
+.section       .pdata
+.align 4
+       .rva    _mul_1x1
+       .rva    .Lend_mul_1x1
+       .rva    .LSEH_info_1x1
+
+       .rva    .Lvanilla_mul_2x2
+       .rva    .Lend_mul_2x2
+       .rva    .LSEH_info_2x2
+.section       .xdata
+.align 8
+.LSEH_info_1x1:
+       .byte   0x01,0x07,0x02,0x00
+       .byte   0x07,0x01,0x11,0x00     # sub rsp,128+8
+.LSEH_info_2x2:
+       .byte   9,0,0,0
+       .rva    se_handler
 ___
+}
 
 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
 print $code;