[Nasm-bugs] [Bug 3392453] New: nasm not compiling line 'call dword 0x0' correctly
no-reply at bugzilla-nasm.gorcunov.org
no-reply at bugzilla-nasm.gorcunov.org
Mon Dec 11 12:12:51 PST 2017
https://bugzilla.nasm.us/show_bug.cgi?id=3392453
Bug ID: 3392453
Summary: nasm not compiling line 'call dword 0x0' correctly
Product: NASM
Version: 2.11.xx
Hardware: All
OS: All
Status: OPEN
Severity: trivial
Priority: Medium
Component: Assembler
Assignee: nobody at nasm.us
Reporter: 96q5aavif1 at contradiction.e4ward.com
CC: gorcunov at gmail.com, hpa at zytor.com, nasm-bugs at nasm.us
Obtained from: From OS distribution
a very simple poc
$ echo 'call dword 0x0' > a.asm
$ nasm -f elf32 -o tmp.o a.asm
$ objcopy --dump-section .text=a.bin a.o
$ cat a.bin | ndisasm -b 32 -
00000000 E8FCFFFFFF call dword 0x1
I guess it should be:
$ echo e8 fb ff ff ff | xxd -ps -r | ndisasm -b 32 -
00000000 E8FBFFFFFF call dword 0x0
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