[src/trunk]: src/sys/compat/linux/arch/powerpc Fixed ptrace() so that it is n...

[manu <manu%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2c63b11d9067
branches:  trunk
changeset: 510219:2c63b11d9067
user:      manu <manu%NetBSD.org@localhost>
date:      Tue May 22 21:09:20 2001 +0000

description:
Fixed ptrace() so that it is now possible to get traced process registers.
This makes Linux gdb able to run a Linux binary

diffstat:

 sys/compat/linux/arch/powerpc/linux_ptrace.c |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (63 lines):

diff -r 188f3438e594 -r 2c63b11d9067 sys/compat/linux/arch/powerpc/linux_ptrace.c
--- a/sys/compat/linux/arch/powerpc/linux_ptrace.c      Tue May 22 21:05:49 2001 +0000
+++ b/sys/compat/linux/arch/powerpc/linux_ptrace.c      Tue May 22 21:09:20 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_ptrace.c,v 1.3 2001/02/04 22:59:26 christos Exp $ */
+/*     $NetBSD: linux_ptrace.c,v 1.4 2001/05/22 21:09:20 manu Exp $ */
 
 /*-
  * Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
@@ -87,6 +87,7 @@
 
 struct linux_user {
        struct linux_pt_regs regs;              
+#define lusr_startgdb regs
        size_t u_tsize;  
        size_t u_dsize;  
        size_t u_ssize;  
@@ -97,9 +98,9 @@
        struct linux_pt_regs *u_ar0;            /* help gdb find registers */
        unsigned long magic;              
        char u_comm[32];         
+#define lu_comm_end u_comm[31]
 };
 
-#define lusr_startgdb regs
 #define LUSR_OFF(member) offsetof(struct linux_user, member)
 #define ISSET(t, f) ((t) & (f))
 
@@ -124,7 +125,6 @@
        int addr;
        int i;
 
-
        switch (request = SCARG(uap, request)) {
        case LINUX_PTRACE_PEEKUSR:
        case LINUX_PTRACE_POKEUSR:
@@ -262,7 +262,8 @@
 
                PHOLD(t);       /* need full process info */
                error = 0;
-                if (addr < LUSR_OFF(lusr_startgdb)) { 
+               if ((addr < LUSR_OFF(lusr_startgdb)) || 
+                   (addr > LUSR_OFF(lu_comm_end))) { 
                        error = 1;
                } else if (addr == LUSR_OFF(u_tsize))
                        *retval = p->p_vmspace->vm_tsize;
@@ -274,7 +275,7 @@
                        *retval = (register_t) p->p_vmspace->vm_taddr;
                else if (addr == LUSR_OFF(start_stack))
                        *retval = (register_t) p->p_vmspace->vm_minsaddr;
-               else if (addr == LUSR_OFF(u_ar0))
+               else if ((addr >=0 ) && (addr < LUSR_OFF(u_tsize)))
                        *retval = LUSR_OFF(regs);
                else if (addr == LUSR_OFF(signal)) {
                        error = 1;
@@ -306,7 +307,6 @@
                /* never reached */
                break;
        }
-
        return EIO;
 
         out: