aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/ptrace.c130
1 files changed, 128 insertions, 2 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 509804957f5..d56aa18309f 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -215,14 +215,14 @@ static int set_segment_reg(struct task_struct *task,
#ifdef CONFIG_IA32_EMULATION
if (test_tsk_thread_flag(task, TIF_IA32))
task_pt_regs(task)->cs = value;
- break;
#endif
+ break;
case offsetof(struct user_regs_struct,ss):
#ifdef CONFIG_IA32_EMULATION
if (test_tsk_thread_flag(task, TIF_IA32))
task_pt_regs(task)->ss = value;
- break;
#endif
+ break;
}
return 0;
@@ -634,6 +634,132 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
return ret;
}
+#ifdef CONFIG_IA32_EMULATION
+
+#include <asm/user32.h>
+
+#define R32(l,q) \
+ case offsetof(struct user32, regs.l): \
+ regs->q = value; break
+
+#define SEG32(rs) \
+ case offsetof(struct user32, regs.rs): \
+ return set_segment_reg(child, \
+ offsetof(struct user_regs_struct, rs), \
+ value); \
+ break
+
+static int putreg32(struct task_struct *child, unsigned regno, u32 value)
+{
+ struct pt_regs *regs = task_pt_regs(child);
+
+ switch (regno) {
+
+ SEG32(cs);
+ SEG32(ds);
+ SEG32(es);
+ SEG32(fs);
+ SEG32(gs);
+ SEG32(ss);
+
+ R32(ebx, bx);
+ R32(ecx, cx);
+ R32(edx, dx);
+ R32(edi, di);
+ R32(esi, si);
+ R32(ebp, bp);
+ R32(eax, ax);
+ R32(orig_eax, orig_ax);
+ R32(eip, ip);
+ R32(esp, sp);
+
+ case offsetof(struct user32, regs.eflags):
+ return set_flags(child, value);
+
+ case offsetof(struct user32, u_debugreg[0]) ...
+ offsetof(struct user32, u_debugreg[7]):
+ regno -= offsetof(struct user32, u_debugreg[0]);
+ return ptrace_set_debugreg(child, regno / 4, value);
+
+ default:
+ if (regno > sizeof(struct user32) || (regno & 3))
+ return -EIO;
+
+ /*
+ * Other dummy fields in the virtual user structure
+ * are ignored
+ */
+ break;
+ }
+ return 0;
+}
+
+#undef R32
+#undef SEG32
+
+#define R32(l,q) \
+ case offsetof(struct user32, regs.l): \
+ *val = regs->q; break
+
+#define SEG32(rs) \
+ case offsetof(struct user32, regs.rs): \
+ *val = get_segment_reg(child, \
+ offsetof(struct user_regs_struct, rs)); \
+ break
+
+static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
+{
+ struct pt_regs *regs = task_pt_regs(child);
+
+ switch (regno) {
+
+ SEG32(ds);
+ SEG32(es);
+ SEG32(fs);
+ SEG32(gs);
+
+ R32(cs, cs);
+ R32(ss, ss);
+ R32(ebx, bx);
+ R32(ecx, cx);
+ R32(edx, dx);
+ R32(edi, di);
+ R32(esi, si);
+ R32(ebp, bp);
+ R32(eax, ax);
+ R32(orig_eax, orig_ax);
+ R32(eip, ip);
+ R32(esp, sp);
+
+ case offsetof(struct user32, regs.eflags):
+ *val = get_flags(child);
+ break;
+
+ case offsetof(struct user32, u_debugreg[0]) ...
+ offsetof(struct user32, u_debugreg[7]):
+ regno -= offsetof(struct user32, u_debugreg[0]);
+ *val = ptrace_get_debugreg(child, regno / 4);
+ break;
+
+ default:
+ if (regno > sizeof(struct user32) || (regno & 3))
+ return -EIO;
+
+ /*
+ * Other dummy fields in the virtual user structure
+ * are ignored
+ */
+ *val = 0;
+ break;
+ }
+ return 0;
+}
+
+#undef R32
+#undef SEG32
+
+#endif /* CONFIG_IA32_EMULATION */
+
#ifdef CONFIG_X86_32
void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)