On Tue, Jan 17, 2006 at 06:00:09AM +0100, Herbert Poetzl wrote: > stumbled over a strange issue (no patches available yet) > dietlibc has on hppa (or parisc), and it seems to me > that other archs could (should?) be affected too ... > > syscalls.s/_llseek.S defines the llseek function as > direct branch/call to the unified syscall wrapper > (which I think is wrong too, but to that later) > > now, on hppa/parisc the calling convention uses r26-r23 > for the first four arguments, the rest is spilled onto > the stack. however the Linux kernel passes the first > six arguments in the registers r26-r21. > > as the llseek syscall takes five arguments, this leads > to random arguments for the r22 (whence argument) and > strange failures like this: > > _llseek(3, 0, 0xc00202d0, 0x4047f444 /* SEEK_??? */) = > -1 EINVAL (Invalid argument)
Hi, I had a similar problem with recvfrom() and sendto() syscalls, and applied the patch below to the dietlibc Debian package. I can't provide a real solution though, I'm afraid. Regards, Gerrit. Index: parisc/recvfrom.S =================================================================== RCS file: /cvs/dietlibc/parisc/recvfrom.S,v retrieving revision 1.1 diff -u -r1.1 recvfrom.S --- parisc/recvfrom.S 20 Jul 2002 13:29:27 -0000 1.1 +++ parisc/recvfrom.S 20 Dec 2005 12:29:14 -0000 @@ -1,3 +1,12 @@ #include "syscalls.h" -syscall(recvfrom, recvfrom); +.level 1.1 +.globl recvfrom +.type recvfrom,@function +recvfrom: + /* Just load the arguments from the + stack into %r21 and %r22 */ + ldw -56(%sr0, %sp), %r21 ; 0x78 + ldw -52(%sr0, %sp), %r22 ; 0x74 + b __unified_syscall + ldi __NR_recvfrom, %r20 Index: parisc/sendto.S =================================================================== RCS file: /cvs/dietlibc/parisc/sendto.S,v retrieving revision 1.1 diff -u -r1.1 sendto.S --- parisc/sendto.S 20 Jul 2002 13:29:27 -0000 1.1 +++ parisc/sendto.S 20 Dec 2005 12:29:15 -0000 @@ -1,3 +1,12 @@ #include "syscalls.h" -syscall(sendto, sendto); +.level 1.1 +.globl sendto +.type sendto,@function +sendto: + /* Just load the arguments from the + stack into %r21 and %r22 */ + ldw -56(%sr0, %sp), %r21 ; 0x78 + ldw -52(%sr0, %sp), %r22 ; 0x74 + b __unified_syscall + ldi __NR_sendto, %r20 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
