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Diffstat (limited to 'arch/sparc/kernel/ptrace_32.c')
-rw-r--r--arch/sparc/kernel/ptrace_32.c269
1 files changed, 143 insertions, 126 deletions
diff --git a/arch/sparc/kernel/ptrace_32.c b/arch/sparc/kernel/ptrace_32.c
index 47eb315d411c..5318174a0268 100644
--- a/arch/sparc/kernel/ptrace_32.c
+++ b/arch/sparc/kernel/ptrace_32.c
@@ -83,41 +83,25 @@ static int regwindow32_set(struct task_struct *target,
static int genregs32_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
const struct pt_regs *regs = target->thread.kregs;
u32 uregs[16];
- int ret;
if (target == current)
flush_user_windows();
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->u_regs,
- 0, 16 * sizeof(u32));
- if (ret || !count)
- return ret;
-
- if (pos < 32 * sizeof(u32)) {
- if (regwindow32_get(target, regs, uregs))
- return -EFAULT;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- uregs,
- 16 * sizeof(u32), 32 * sizeof(u32));
- if (ret || !count)
- return ret;
- }
-
- uregs[0] = regs->psr;
- uregs[1] = regs->pc;
- uregs[2] = regs->npc;
- uregs[3] = regs->y;
- uregs[4] = 0; /* WIM */
- uregs[5] = 0; /* TBR */
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- uregs,
- 32 * sizeof(u32), 38 * sizeof(u32));
+ membuf_write(&to, regs->u_regs, 16 * sizeof(u32));
+ if (!to.left)
+ return 0;
+ if (regwindow32_get(target, regs, uregs))
+ return -EFAULT;
+ membuf_write(&to, uregs, 16 * sizeof(u32));
+ membuf_store(&to, regs->psr);
+ membuf_store(&to, regs->pc);
+ membuf_store(&to, regs->npc);
+ membuf_store(&to, regs->y);
+ return membuf_zero(&to, 2 * sizeof(u32));
}
static int genregs32_set(struct task_struct *target,
@@ -139,19 +123,18 @@ static int genregs32_set(struct task_struct *target,
if (ret || !count)
return ret;
- if (pos < 32 * sizeof(u32)) {
- if (regwindow32_get(target, regs, uregs))
- return -EFAULT;
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- uregs,
- 16 * sizeof(u32), 32 * sizeof(u32));
- if (ret)
- return ret;
- if (regwindow32_set(target, regs, uregs))
- return -EFAULT;
- if (!count)
- return 0;
- }
+ if (regwindow32_get(target, regs, uregs))
+ return -EFAULT;
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ uregs,
+ 16 * sizeof(u32), 32 * sizeof(u32));
+ if (ret)
+ return ret;
+ if (regwindow32_set(target, regs, uregs))
+ return -EFAULT;
+ if (!count)
+ return 0;
+
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&psr,
32 * sizeof(u32), 33 * sizeof(u32));
@@ -182,46 +165,18 @@ static int genregs32_set(struct task_struct *target,
static int fpregs32_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
- const unsigned long *fpregs = target->thread.float_regs;
- int ret = 0;
-
#if 0
if (target == current)
save_and_clear_fpu();
#endif
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- fpregs,
- 0, 32 * sizeof(u32));
-
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 32 * sizeof(u32),
- 33 * sizeof(u32));
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.fsr,
- 33 * sizeof(u32),
- 34 * sizeof(u32));
-
- if (!ret) {
- unsigned long val;
-
- val = (1 << 8) | (8 << 16);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &val,
- 34 * sizeof(u32),
- 35 * sizeof(u32));
- }
-
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 35 * sizeof(u32), -1);
-
- return ret;
+ membuf_write(&to, target->thread.float_regs, 32 * sizeof(u32));
+ membuf_zero(&to, sizeof(u32));
+ membuf_write(&to, &target->thread.fsr, sizeof(u32));
+ membuf_store(&to, (u32)((1 << 8) | (8 << 16)));
+ return membuf_zero(&to, 64 * sizeof(u32));
}
static int fpregs32_set(struct task_struct *target,
@@ -243,13 +198,11 @@ static int fpregs32_set(struct task_struct *target,
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
32 * sizeof(u32),
33 * sizeof(u32));
- if (!ret && count > 0) {
+ if (!ret)
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fsr,
33 * sizeof(u32),
34 * sizeof(u32));
- }
-
if (!ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
34 * sizeof(u32), -1);
@@ -268,7 +221,7 @@ static const struct user_regset sparc32_regsets[] = {
.core_note_type = NT_PRSTATUS,
.n = 38,
.size = sizeof(u32), .align = sizeof(u32),
- .get = genregs32_get, .set = genregs32_set
+ .regset_get = genregs32_get, .set = genregs32_set
},
/* Format is:
* F0 --> F31
@@ -284,10 +237,104 @@ static const struct user_regset sparc32_regsets[] = {
.core_note_type = NT_PRFPREG,
.n = 99,
.size = sizeof(u32), .align = sizeof(u32),
- .get = fpregs32_get, .set = fpregs32_set
+ .regset_get = fpregs32_get, .set = fpregs32_set
+ },
+};
+
+static int getregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ struct membuf to)
+{
+ const struct pt_regs *regs = target->thread.kregs;
+
+ if (target == current)
+ flush_user_windows();
+
+ membuf_store(&to, regs->psr);
+ membuf_store(&to, regs->pc);
+ membuf_store(&to, regs->npc);
+ membuf_store(&to, regs->y);
+ return membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u32));
+}
+
+static int setregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ struct pt_regs *regs = target->thread.kregs;
+ u32 v[4];
+ int ret;
+
+ if (target == current)
+ flush_user_windows();
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ v,
+ 0, 4 * sizeof(u32));
+ if (ret)
+ return ret;
+ regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
+ (v[0] & (PSR_ICC | PSR_SYSCALL));
+ regs->pc = v[1];
+ regs->npc = v[2];
+ regs->y = v[3];
+ return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->u_regs + 1,
+ 4 * sizeof(u32) , 19 * sizeof(u32));
+}
+
+static int getfpregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ struct membuf to)
+{
+#if 0
+ if (target == current)
+ save_and_clear_fpu();
+#endif
+ membuf_write(&to, &target->thread.float_regs, 32 * sizeof(u32));
+ membuf_write(&to, &target->thread.fsr, sizeof(u32));
+ return membuf_zero(&to, 35 * sizeof(u32));
+}
+
+static int setfpregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ unsigned long *fpregs = target->thread.float_regs;
+ int ret;
+
+#if 0
+ if (target == current)
+ save_and_clear_fpu();
+#endif
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ fpregs,
+ 0, 32 * sizeof(u32));
+ if (ret)
+ return ret;
+ return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fsr,
+ 32 * sizeof(u32),
+ 33 * sizeof(u32));
+}
+
+static const struct user_regset ptrace32_regsets[] = {
+ [REGSET_GENERAL] = {
+ .n = 19, .size = sizeof(u32),
+ .regset_get = getregs_get, .set = setregs_set,
+ },
+ [REGSET_FP] = {
+ .n = 68, .size = sizeof(u32),
+ .regset_get = getfpregs_get, .set = setfpregs_set,
},
};
+static const struct user_regset_view ptrace32_view = {
+ .regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
+};
+
static const struct user_regset_view user_sparc32_view = {
.name = "sparc", .e_machine = EM_SPARC,
.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
@@ -315,74 +362,44 @@ long arch_ptrace(struct task_struct *child, long request,
{
unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
void __user *addr2p;
- const struct user_regset_view *view;
struct pt_regs __user *pregs;
struct fps __user *fps;
int ret;
- view = task_user_regset_view(current);
addr2p = (void __user *) addr2;
pregs = (struct pt_regs __user *) addr;
fps = (struct fps __user *) addr;
switch(request) {
case PTRACE_GETREGS: {
- ret = copy_regset_to_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u32),
- 4 * sizeof(u32),
- &pregs->psr);
- if (!ret)
- copy_regset_to_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u32),
- 15 * sizeof(u32),
- &pregs->u_regs[0]);
+ ret = copy_regset_to_user(child, &ptrace32_view,
+ REGSET_GENERAL, 0,
+ 19 * sizeof(u32),
+ pregs);
break;
}
case PTRACE_SETREGS: {
- ret = copy_regset_from_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u32),
- 4 * sizeof(u32),
- &pregs->psr);
- if (!ret)
- copy_regset_from_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u32),
- 15 * sizeof(u32),
- &pregs->u_regs[0]);
+ ret = copy_regset_from_user(child, &ptrace32_view,
+ REGSET_GENERAL, 0,
+ 19 * sizeof(u32),
+ pregs);
break;
}
case PTRACE_GETFPREGS: {
- ret = copy_regset_to_user(child, view, REGSET_FP,
- 0 * sizeof(u32),
- 32 * sizeof(u32),
- &fps->regs[0]);
- if (!ret)
- ret = copy_regset_to_user(child, view, REGSET_FP,
- 33 * sizeof(u32),
- 1 * sizeof(u32),
- &fps->fsr);
-
- if (!ret) {
- if (__put_user(0, &fps->fpqd) ||
- __put_user(0, &fps->flags) ||
- __put_user(0, &fps->extra) ||
- clear_user(fps->fpq, sizeof(fps->fpq)))
- ret = -EFAULT;
- }
+ ret = copy_regset_to_user(child, &ptrace32_view,
+ REGSET_FP, 0,
+ 68 * sizeof(u32),
+ fps);
break;
}
case PTRACE_SETFPREGS: {
- ret = copy_regset_from_user(child, view, REGSET_FP,
- 0 * sizeof(u32),
- 32 * sizeof(u32),
- &fps->regs[0]);
- if (!ret)
- ret = copy_regset_from_user(child, view, REGSET_FP,
- 33 * sizeof(u32),
- 1 * sizeof(u32),
- &fps->fsr);
+ ret = copy_regset_from_user(child, &ptrace32_view,
+ REGSET_FP, 0,
+ 33 * sizeof(u32),
+ fps);
break;
}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-19 02:21:53 +0000