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
