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Bug 22932 – -vasm: wrong registers shown for calls to C-style variadic functions

Status: NEW
Severity: normal
Priority: P3
Component: dmd
Product: D
Version: D2
Platform: x86_64
OS: Linux
Creation time: 2022-03-25T12:31:40Z
Last change time: 2024-12-13T19:21:41Z
Keywords: disassembler
Assigned to: No Owner
Creator: duser

Moved to GitHub: dmd#20073 →

Comments

Comment #0 by duser — 2022-03-25T12:31:40Z

import core.stdc.stdarg; extern(C) void fn(int, ...) {} void main() { fn(1, 2, 3, 4, 5); } -vasm output on 64-bit linux: _Dmain: 0000: 55 push RBP 0001: 48 8B EC mov RBP,RSP 0004: 41 B8 05 00 00 00 mov EAX,5 000a: B9 04 00 00 00 mov EAX,4 000f: BA 03 00 00 00 mov EAX,3 0014: BE 02 00 00 00 mov EAX,2 0019: BF 01 00 00 00 mov EAX,1 001e: 31 C0 xor EAX,EAX 0020: E8 00 00 00 00 call L0 0025: 31 C0 xor EAX,EAX 0027: 5D pop RBP 0028: C3 ret

Comment #1 by maxhaton — 2022-06-07T11:37:59Z

Why is this a bug exactly?

Comment #2 by robert.schadek — 2024-12-13T19:21:41Z

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/20073 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB