direct-io.hg

changeset 372:93721e4cec72

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bitkeeper revision 1.174.1.1 (3e9da471qg3yz_feoqPtr18G7aJ8UA)

ptrace.h, traps.c:
Fix ring privilege checking in Xenolinux (OS runs in ring 1, not ring 0).
author kaf24@scramble.cl.cam.ac.uk
date Wed Apr 16 18:44:01 2003 +0000 (2003-04-16)
parents 95c43a4b6685
children c3eb2a837ee5
files xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/traps.c xenolinux-2.4.21-pre4-sparse/include/asm-xeno/ptrace.h
line diff
     1.1 --- a/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/traps.c	Wed Apr 16 17:45:20 2003 +0000
     1.2 +++ b/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/traps.c	Wed Apr 16 18:44:01 2003 +0000
     1.3 @@ -364,7 +364,7 @@ asmlinkage void do_debug(struct pt_regs 
     1.4      /* If this is a kernel mode trap, save the user PC on entry to 
     1.5       * the kernel, that's what the debugger can make sense of.
     1.6       */
     1.7 -    info.si_addr = ((regs->xcs & 3) == 0) ? (void *)tsk->thread.eip : 
     1.8 +    info.si_addr = ((regs->xcs & 2) == 0) ? (void *)tsk->thread.eip : 
     1.9                                              (void *)regs->eip;
    1.10      force_sig_info(SIGTRAP, &info, tsk);
    1.11  

     2.1 --- a/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/ptrace.h	Wed Apr 16 17:45:20 2003 +0000
     2.2 +++ b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/ptrace.h	Wed Apr 16 18:44:01 2003 +0000
     2.3 @@ -55,7 +55,7 @@ struct pt_regs {
     2.4  #define PTRACE_O_TRACESYSGOOD     0x00000001
     2.5  
     2.6  #ifdef __KERNEL__
     2.7 -#define user_mode(regs) ((regs) && (3 & (regs)->xcs))
     2.8 +#define user_mode(regs) ((regs) && (2 & (regs)->xcs))
     2.9  #define instruction_pointer(regs) ((regs) ? (regs)->eip : NULL)
    2.10  extern void show_regs(struct pt_regs *);
    2.11  #endif