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Bug 164755

Summary: SysV IPC operation incorrectly handled on x86-64
Product: [Fedora] Fedora Reporter: Ulrich Drepper <drepper>
Component: straceAssignee: Roland McGrath <roland>
Status: CLOSED CURRENTRELEASE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: ldv
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: 4.5.14 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-04-03 08:34:47 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 158504    
Description Flags
Remove special linux demux handling for x86-64
strace-4.5.13-drepper-x86_64-ipc.patch none

Description Ulrich Drepper 2005-08-01 00:03:30 UTC
Description of problem:
Unlike some/most other archs, x86-64 has real syscalls for the SysV IPC
operations.  This means the special #ifdef LINUX code in the various sys_*
functions must be avoided for x86-64.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.strace any code using msgsnd, msgrcv, ...
Actual results:
[pid 19816] msgsnd(98304, {6549608, umovestr: Input/output error
0x8}, 140737484181616, 0x4 /* MSG_??? */) = 0

Expected results:
[pid 24526] msgsnd(262149, {1, "\0\0\0\0"}, 4, 0) = 0

Additional info:
Attached patch should fix it.  There are also some syscall number bugs.

2005-07-31  Ulrich Drepper  <>

	* linux/x86_64/syscallent.h: Fix syscall parameter count for msgrcv and
	* ipc.c: Don't use LINUX specific code in sys_msgctl, sys_msgsnd,
	sys_msgrcv, sys_semop, sys_shmctl, sys_shmat, sys_shmdt.  Add
	appropriate non-demux code to sys_semtimedop.

Comment 1 Ulrich Drepper 2005-08-01 00:03:30 UTC
Created attachment 117330 [details]
Remove special linux demux handling for x86-64

Comment 2 Dmitry V. Levin 2005-08-08 17:21:02 UTC
Created attachment 117546 [details]

Rediffed for strace-4.5.13.

Comment 3 Roland McGrath 2005-12-02 03:54:55 UTC
Your patch breaks it for 32-bit inferiors.
I've put in changes upstream that should do the trick.

Comment 4 Roland McGrath 2006-04-03 08:34:47 UTC
Fixed in fc4 update and in fc5.