diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s')
-rw-r--r-- | xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s b/xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s new file mode 100644 index 0000000000..5cc19b4c57 --- /dev/null +++ b/xpcom/reflect/xptcall/md/win32/xptcinvoke_asm_x86_64_gnu.s @@ -0,0 +1,110 @@ +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +.extern invoke_copy_to_stack + + +.text +.intel_syntax noprefix + +# +#_XPTC__InvokebyIndex(nsISupports* that, uint32_t methodIndex, +# uint32_t paramCount, nsXPTCVariant* params) +# + +.globl XPTC__InvokebyIndex +.def XPTC__InvokebyIndex + .scl 2 + .type 46 +.endef +XPTC__InvokebyIndex: + + # store register parameters + + mov qword ptr [rsp+32], r9 # params + mov dword ptr [rsp+24], r8d # paramCount + mov dword ptr [rsp+16], edx # methodIndex + mov qword ptr [rsp+8], rcx # that + + push rbp + # .PUSHREG rbp + mov rbp, rsp # store current RSP to RBP + # .SETFRAME rbp, 0 + # .ENDPROLOG + + sub rsp, 32 + + # maybe we don't have any parameters to copy + + test r8d, r8d + jz noparams + + # + # Build stack for stdcall + # + + # 1st parameter is space for parameters + + mov eax, r8d + or eax, 1 + shl rax, 3 # *= 8 + sub rsp, rax + mov rcx, rsp + + # 2nd parameter is parameter count + + mov edx, r8d + + # 3rd parameter is params + + mov r8, r9 + + sub rsp, 40 + call invoke_copy_to_stack # rcx = d + # edx = paramCount + # r8 = s + add rsp, 32 + + # Current stack is the following. + # + # 0h: [space (for this)] + # 8h: [1st parameter] + # 10h: [2nd parameter] + # 18h: [3rd parameter] + # 20h: [4th parameter] + # ... + # + # On Win64 ABI, the first 4 parameters are passed using registers, + # and others are on stack. + + # 1st, 2nd and 3rd arguments are passed via registers + + mov rdx, qword ptr [rsp+8] # 1st parameter + movsd xmm1, qword ptr [rsp+8] # for double + + mov r8, qword ptr [rsp+16] # 2nd parameter + movsd xmm2, qword ptr [rsp+16] # for double + + mov r9, qword ptr [rsp+24] # 3rd parameter + movsd xmm3, qword ptr [rsp+24] # for double + + # rcx register is this + + mov rcx, qword ptr [rbp+8+8] # that + +noparams: + + # calculate call address + + mov r11, qword ptr [rcx] + mov eax, dword ptr [rbp+16+8] # methodIndex + + call qword ptr [r11+rax*8] # stdcall, i.e. callee cleans up stack. + + mov rsp, rbp + pop rbp + + ret + + |