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comparison: xpcom/reflect/xptcall/src/md/win32/xptcinvoke_asm_x86_64.asm
xpcom/reflect/xptcall/src/md/win32/xptcinvoke_asm_x86_64.asm
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:866ebc755fb2 |
|---|---|
| 1 ; This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 ; License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 ; file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 | |
| 5 extrn invoke_copy_to_stack:PROC | |
| 6 | |
| 7 | |
| 8 .CODE | |
| 9 | |
| 10 ; | |
| 11 ;XPTC__InvokebyIndex(nsISupports* that, uint32_t methodIndex, | |
| 12 ; uint32_t paramCount, nsXPTCVariant* params) | |
| 13 ; | |
| 14 | |
| 15 XPTC__InvokebyIndex PROC FRAME | |
| 16 | |
| 17 ; store register parameters | |
| 18 | |
| 19 mov qword ptr [rsp+32], r9 ; params | |
| 20 mov dword ptr [rsp+24], r8d ; paramCount | |
| 21 mov dword ptr [rsp+16], edx ; methodIndex | |
| 22 mov qword ptr [rsp+8], rcx ; that | |
| 23 | |
| 24 push rbp | |
| 25 .PUSHREG rbp | |
| 26 mov rbp, rsp ; store current RSP to RBP | |
| 27 .SETFRAME rbp, 0 | |
| 28 .ENDPROLOG | |
| 29 | |
| 30 sub rsp, 32 | |
| 31 | |
| 32 ; maybe we don't have any parameters to copy | |
| 33 | |
| 34 test r8d, r8d | |
| 35 jz noparams | |
| 36 | |
| 37 ; | |
| 38 ; Build stack for stdcall | |
| 39 ; | |
| 40 | |
| 41 ; 1st parameter is space for parameters | |
| 42 | |
| 43 mov eax, r8d | |
| 44 or eax, 1 | |
| 45 shl rax, 3 ; *= 8 | |
| 46 sub rsp, rax | |
| 47 mov rcx, rsp | |
| 48 | |
| 49 ; 2nd parameter is parameter count | |
| 50 | |
| 51 mov edx, r8d | |
| 52 | |
| 53 ; 3rd parameter is params | |
| 54 | |
| 55 mov r8, r9 | |
| 56 | |
| 57 sub rsp, 40 | |
| 58 call invoke_copy_to_stack ; rcx = d | |
| 59 ; edx = paramCount | |
| 60 ; r8 = s | |
| 61 add rsp, 32 | |
| 62 | |
| 63 ; Current stack is the following. | |
| 64 ; | |
| 65 ; 0h: [space (for this)] | |
| 66 ; 8h: [1st parameter] | |
| 67 ; 10h: [2nd parameter] | |
| 68 ; 18h: [3rd parameter] | |
| 69 ; 20h: [4th parameter] | |
| 70 ; ... | |
| 71 ; | |
| 72 ; On Win64 ABI, the first 4 parameters are passed using registers, | |
| 73 ; and others are on stack. | |
| 74 | |
| 75 ; 1st, 2nd and 3rd arguments are passed via registers | |
| 76 | |
| 77 mov rdx, qword ptr [rsp+8] ; 1st parameter | |
| 78 movsd xmm1, qword ptr [rsp+8] ; for double | |
| 79 | |
| 80 mov r8, qword ptr [rsp+16] ; 2nd parameter | |
| 81 movsd xmm2, qword ptr [rsp+16] ; for double | |
| 82 | |
| 83 mov r9, qword ptr [rsp+24] ; 3rd parameter | |
| 84 movsd xmm3, qword ptr [rsp+24] ; for double | |
| 85 | |
| 86 ; rcx register is this | |
| 87 | |
| 88 mov rcx, qword ptr [rbp+8+8] ; that | |
| 89 | |
| 90 noparams: | |
| 91 | |
| 92 ; calculate call address | |
| 93 | |
| 94 mov r11, qword ptr [rcx] | |
| 95 mov eax, dword ptr [rbp+16+8] ; methodIndex | |
| 96 | |
| 97 call qword ptr [r11+rax*8] ; stdcall, i.e. callee cleans up stack. | |
| 98 | |
| 99 mov rsp, rbp | |
| 100 pop rbp | |
| 101 | |
| 102 ret | |
| 103 | |
| 104 XPTC__InvokebyIndex ENDP | |
| 105 | |
| 106 | |
| 107 END |
