From: Daniel Jacobowitz <dan@debian.org>
To: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Subject: MIPS64 syscall trace patch
Date: Thu, 4 Dec 2003 11:53:29 -0500 [thread overview]
Message-ID: <20031204165329.GA4655@nevyn.them.org> (raw)
You need this do use PTRACE_SYSCALL on a 64-bit process. Otherwise mmap()'s
last argument gets corrupted by syscall_trace(). Strace itself doesn't work
yet, but I'm making progress...
This is for 2.4. 2.6 patch will follow in a sec.
Index: arch/mips64/kernel/scall_64.S
===================================================================
RCS file: /home/cvs/linux/arch/mips64/kernel/Attic/scall_64.S,v
retrieving revision 1.20.2.18
diff -u -p -r1.20.2.18 scall_64.S
--- arch/mips64/kernel/scall_64.S 28 Oct 2003 13:39:37 -0000 1.20.2.18
+++ arch/mips64/kernel/scall_64.S 4 Dec 2003 16:51:01 -0000
@@ -108,6 +108,8 @@ trace_a_syscall:
ld a1, PT_R5(sp)
ld a2, PT_R6(sp)
ld a3, PT_R7(sp)
+ ld a4, PT_R8(sp)
+ ld a5, PT_R9(sp)
jalr t2
li t0, -EMAXERRNO - 1 # error?
Index: arch/mips64/kernel/scall_n32.S
===================================================================
RCS file: /home/cvs/linux/arch/mips64/kernel/Attic/scall_n32.S,v
retrieving revision 1.2.2.14
diff -u -p -r1.2.2.14 scall_n32.S
--- arch/mips64/kernel/scall_n32.S 9 Oct 2003 15:42:33 -0000 1.2.2.14
+++ arch/mips64/kernel/scall_n32.S 4 Dec 2003 16:51:01 -0000
@@ -111,6 +111,8 @@ trace_a_syscall:
ld a1, PT_R5(sp)
ld a2, PT_R6(sp)
ld a3, PT_R7(sp)
+ ld a4, PT_R8(sp)
+ ld a5, PT_R9(sp)
jalr t2
li t0, -EMAXERRNO - 1 # error?
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
reply other threads:[~2003-12-04 16:53 UTC|newest]
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