sh: Add ptrace support for NOMMU debugging

[safe/jmp/linux-2.6] / arch / sh / kernel / ptrace_32.c

diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 20b103f..3392e83 100644 (file)
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -32,6 +32,7 @@
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
 #include <asm/syscalls.h>
+#include <asm/fpu.h>
 
 /*
  * This routine will get a word off of the process kernel stack.
@@ -145,13 +146,62 @@ static int genregs_set(struct task_struct *target,
        return ret;
 }
 
+#ifdef CONFIG_SH_FPU
+int fpregs_get(struct task_struct *target,
+              const struct user_regset *regset,
+              unsigned int pos, unsigned int count,
+              void *kbuf, void __user *ubuf)
+{
+       int ret;
+
+       ret = init_fpu(target);
+       if (ret)
+               return ret;
+
+       if ((boot_cpu_data.flags & CPU_HAS_FPU))
+               return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+                                          &target->thread.fpu.hard, 0, -1);
+
+       return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+                                  &target->thread.fpu.soft, 0, -1);
+}
+
+static int fpregs_set(struct task_struct *target,
+                      const struct user_regset *regset,
+                      unsigned int pos, unsigned int count,
+                      const void *kbuf, const void __user *ubuf)
+{
+       int ret;
+
+       ret = init_fpu(target);
+       if (ret)
+               return ret;
+
+       set_stopped_child_used_math(target);
+
+       if ((boot_cpu_data.flags & CPU_HAS_FPU))
+               return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+                                         &target->thread.fpu.hard, 0, -1);
+
+       return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+                                 &target->thread.fpu.soft, 0, -1);
+}
+
+static int fpregs_active(struct task_struct *target,
+                        const struct user_regset *regset)
+{
+       return tsk_used_math(target) ? regset->n : 0;
+}
+#endif
+
 #ifdef CONFIG_SH_DSP
 static int dspregs_get(struct task_struct *target,
                       const struct user_regset *regset,
                       unsigned int pos, unsigned int count,
                       void *kbuf, void __user *ubuf)
 {
-       const struct pt_dspregs *regs = task_pt_dspregs(target);
+       const struct pt_dspregs *regs =
+               (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
        int ret;
 
        ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
@@ -168,7 +218,8 @@ static int dspregs_set(struct task_struct *target,
                       unsigned int pos, unsigned int count,
                       const void *kbuf, const void __user *ubuf)
 {
-       struct pt_dspregs *regs = task_pt_dspregs(target);
+       struct pt_dspregs *regs =
+               (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
        int ret;
 
        ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
@@ -179,6 +230,14 @@ static int dspregs_set(struct task_struct *target,
 
        return ret;
 }
+
+static int dspregs_active(struct task_struct *target,
+                         const struct user_regset *regset)
+{
+       struct pt_regs *regs = task_pt_regs(target);
+
+       return regs->sr & SR_DSP ? regset->n : 0;
+}
 #endif
 
 /*
@@ -186,6 +245,9 @@ static int dspregs_set(struct task_struct *target,
  */
 enum sh_regset {
        REGSET_GENERAL,
+#ifdef CONFIG_SH_FPU
+       REGSET_FPU,
+#endif
 #ifdef CONFIG_SH_DSP
        REGSET_DSP,
 #endif
@@ -206,6 +268,18 @@ static const struct user_regset sh_regsets[] = {
                .set            = genregs_set,
        },
 
+#ifdef CONFIG_SH_FPU
+       [REGSET_FPU] = {
+               .core_note_type = NT_PRFPREG,
+               .n              = sizeof(struct user_fpu_struct) / sizeof(long),
+               .size           = sizeof(long),
+               .align          = sizeof(long),
+               .get            = fpregs_get,
+               .set            = fpregs_set,
+               .active         = fpregs_active,
+       },
+#endif
+
 #ifdef CONFIG_SH_DSP
        [REGSET_DSP] = {
                .n              = sizeof(struct pt_dspregs) / sizeof(long),
@@ -213,6 +287,7 @@ static const struct user_regset sh_regsets[] = {
                .align          = sizeof(long),
                .get            = dspregs_get,
                .set            = dspregs_set,
+               .active         = dspregs_active,
        },
 #endif
 };
@@ -224,6 +299,11 @@ static const struct user_regset_view user_sh_native_view = {
        .n              = ARRAY_SIZE(sh_regsets),
 };
 
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+       return &user_sh_native_view;
+}
+
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
        struct user * dummy = NULL;
@@ -254,6 +334,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                        [(addr - (long)&dummy->fpu) >> 2];
                } else if (addr == (long) &dummy->u_fpvalid)
                        tmp = !!tsk_used_math(child);
+               else if (addr == PT_TEXT_ADDR)
+                       tmp = child->mm->start_code;
+               else if (addr == PT_DATA_ADDR)
+                       tmp = child->mm->start_data;
+               else if (addr == PT_TEXT_END_ADDR)
+                       tmp = child->mm->end_code;
+               else if (addr == PT_TEXT_LEN)
+                       tmp = child->mm->end_code - child->mm->start_code;
                else
                        tmp = 0;
                ret = put_user(tmp, datap);
@@ -290,6 +378,18 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                             REGSET_GENERAL,
                                             0, sizeof(struct pt_regs),
                                             (const void __user *)data);
+#ifdef CONFIG_SH_FPU
+       case PTRACE_GETFPREGS:
+               return copy_regset_to_user(child, &user_sh_native_view,
+                                          REGSET_FPU,
+                                          0, sizeof(struct user_fpu_struct),
+                                          (void __user *)data);
+       case PTRACE_SETFPREGS:
+               return copy_regset_from_user(child, &user_sh_native_view,
+                                            REGSET_FPU,
+                                            0, sizeof(struct user_fpu_struct),
+                                            (const void __user *)data);
+#endif
 #ifdef CONFIG_SH_DSP
        case PTRACE_GETDSPREGS:
                return copy_regset_to_user(child, &user_sh_native_view,