Would it be possible (and likely :-) to stick the 2.3.22 patch below into
2.2.x? It removes the restriction that ptrace(POKEUSER, ...) can't modify
system call numbers.
This is needed by my user-mode port and a few other apps. It would be
convenient for users to have this already in their kernels.
Thanks, Jeff
diff -u --recursive --new-file v2.3.21/linux/arch/i386/kernel/entry.S
linux/arch/i386/kernel/entry.S
--- v2.3.21/linux/arch/i386/kernel/entry.S Sat Oct 9 11:47:50 1999
+++ linux/arch/i386/kernel/entry.S Tue Oct 12 10:05:53 1999
@@ -237,8 +237,11 @@
movl $-ENOSYS,EAX(%esp)
call SYMBOL_NAME(syscall_trace)
movl ORIG_EAX(%esp),%eax
+ cmpl $(NR_syscalls),%eax
+ jae tracesys_exit
call *SYMBOL_NAME(sys_call_table)(,%eax,4)
movl %eax,EAX(%esp) # save the return value
+tracesys_exit:
call SYMBOL_NAME(syscall_trace)
jmp ret_from_sys_call
badsys:
diff -u --recursive --new-file v2.3.21/linux/arch/i386/kernel/ptrace.c
linux/arch/i386/kernel/ptrace.c
--- v2.3.21/linux/arch/i386/kernel/ptrace.c Sun Jul 11 09:11:46 1999
+++ linux/arch/i386/kernel/ptrace.c Tue Oct 12 10:05:53 1999
@@ -71,8 +71,6 @@
unsigned long regno, unsigned long value)
{
switch (regno >> 2) {
- case ORIG_EAX:
- return -EIO;
case FS:
if (value && (value & 3) != 3)
return -EIO;
-
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