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path: root/arch/um/sys-x86_64/ptrace.c
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Diffstat (limited to 'arch/um/sys-x86_64/ptrace.c')
-rw-r--r--arch/um/sys-x86_64/ptrace.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c
index 8c146b2a1e0..b593bb256f2 100644
--- a/arch/um/sys-x86_64/ptrace.c
+++ b/arch/um/sys-x86_64/ptrace.c
@@ -62,6 +62,27 @@ int putreg(struct task_struct *child, int regno, unsigned long value)
return 0;
}
+int poke_user(struct task_struct *child, long addr, long data)
+{
+ if ((addr & 3) || addr < 0)
+ return -EIO;
+
+ if (addr < MAX_REG_OFFSET)
+ return putreg(child, addr, data);
+
+#if 0 /* Need x86_64 debugregs handling */
+ else if((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))){
+ addr -= offsetof(struct user, u_debugreg[0]);
+ addr = addr >> 2;
+ if((addr == 4) || (addr == 5)) return -EIO;
+ child->thread.arch.debugregs[addr] = data;
+ return 0;
+ }
+#endif
+ return -EIO;
+}
+
unsigned long getreg(struct task_struct *child, int regno)
{
unsigned long retval = ~0UL;
@@ -84,6 +105,29 @@ unsigned long getreg(struct task_struct *child, int regno)
return retval;
}
+int peek_user(struct task_struct *child, long addr, long data)
+{
+ /* read the word at location addr in the USER area. */
+ unsigned long tmp;
+
+ if ((addr & 3) || addr < 0)
+ return -EIO;
+
+ tmp = 0; /* Default return condition */
+ if(addr < MAX_REG_OFFSET){
+ tmp = getreg(child, addr);
+ }
+#if 0 /* Need x86_64 debugregs handling */
+ else if((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))){
+ addr -= offsetof(struct user, u_debugreg[0]);
+ addr = addr >> 2;
+ tmp = child->thread.arch.debugregs[addr];
+ }
+#endif
+ return put_user(tmp, (unsigned long *) data);
+}
+
void arch_switch(void)
{
/* XXX