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Diffstat (limited to 'arch/sparc64/kernel/ptrace.c')
-rw-r--r--arch/sparc64/kernel/ptrace.c222
1 files changed, 189 insertions, 33 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index 9a1ba1fe859d..e9fc0aa2da38 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -35,6 +35,9 @@
#include <asm/spitfire.h>
#include <asm/page.h>
#include <asm/cpudata.h>
+#include <asm/cacheflush.h>
+
+#include "entry.h"
/* #define ALLOW_INIT_TRACING */
@@ -67,6 +70,8 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
if (tlb_type == hypervisor)
return;
+ preempt_disable();
+
#ifdef DCACHE_ALIASING_POSSIBLE
/* If bit 13 of the kernel address we used to access the
* user page is the same as the virtual address that page
@@ -105,6 +110,87 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
for (; start < end; start += icache_line_size)
flushi(start);
}
+
+ preempt_enable();
+}
+
+static int get_from_target(struct task_struct *target, unsigned long uaddr,
+ void *kbuf, int len)
+{
+ if (target == current) {
+ if (copy_from_user(kbuf, (void __user *) uaddr, len))
+ return -EFAULT;
+ } else {
+ int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
+ if (len2 != len)
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int set_to_target(struct task_struct *target, unsigned long uaddr,
+ void *kbuf, int len)
+{
+ if (target == current) {
+ if (copy_to_user((void __user *) uaddr, kbuf, len))
+ return -EFAULT;
+ } else {
+ int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
+ if (len2 != len)
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int regwindow64_get(struct task_struct *target,
+ const struct pt_regs *regs,
+ struct reg_window *wbuf)
+{
+ unsigned long rw_addr = regs->u_regs[UREG_I6];
+
+ if (test_tsk_thread_flag(current, TIF_32BIT)) {
+ struct reg_window32 win32;
+ int i;
+
+ if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
+ return -EFAULT;
+ for (i = 0; i < 8; i++)
+ wbuf->locals[i] = win32.locals[i];
+ for (i = 0; i < 8; i++)
+ wbuf->ins[i] = win32.ins[i];
+ } else {
+ rw_addr += STACK_BIAS;
+ if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int regwindow64_set(struct task_struct *target,
+ const struct pt_regs *regs,
+ struct reg_window *wbuf)
+{
+ unsigned long rw_addr = regs->u_regs[UREG_I6];
+
+ if (test_tsk_thread_flag(current, TIF_32BIT)) {
+ struct reg_window32 win32;
+ int i;
+
+ for (i = 0; i < 8; i++)
+ win32.locals[i] = wbuf->locals[i];
+ for (i = 0; i < 8; i++)
+ win32.ins[i] = wbuf->ins[i];
+
+ if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
+ return -EFAULT;
+ } else {
+ rw_addr += STACK_BIAS;
+ if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
+ return -EFAULT;
+ }
+
+ return 0;
}
enum sparc_regset {
@@ -126,16 +212,13 @@ static int genregs64_get(struct task_struct *target,
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->u_regs,
0, 16 * sizeof(u64));
- if (!ret) {
- unsigned long __user *reg_window = (unsigned long __user *)
- (regs->u_regs[UREG_I6] + STACK_BIAS);
- unsigned long window[16];
+ if (!ret && count && pos < (32 * sizeof(u64))) {
+ struct reg_window window;
- if (copy_from_user(window, reg_window, sizeof(window)))
+ if (regwindow64_get(target, regs, &window))
return -EFAULT;
-
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- window,
+ &window,
16 * sizeof(u64),
32 * sizeof(u64));
}
@@ -157,10 +240,11 @@ static int genregs64_get(struct task_struct *target,
36 * sizeof(u64));
}
- if (!ret)
+ if (!ret) {
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
36 * sizeof(u64), -1);
+ }
return ret;
}
@@ -178,20 +262,19 @@ static int genregs64_set(struct task_struct *target,
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs->u_regs,
0, 16 * sizeof(u64));
- if (!ret && count > 0) {
- unsigned long __user *reg_window = (unsigned long __user *)
- (regs->u_regs[UREG_I6] + STACK_BIAS);
- unsigned long window[16];
+ if (!ret && count && pos < (32 * sizeof(u64))) {
+ struct reg_window window;
- if (copy_from_user(window, reg_window, sizeof(window)))
+ if (regwindow64_get(target, regs, &window))
return -EFAULT;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- window,
+ &window,
16 * sizeof(u64),
32 * sizeof(u64));
+
if (!ret &&
- copy_to_user(reg_window, window, sizeof(window)))
+ regwindow64_set(target, regs, &window))
return -EFAULT;
}
@@ -382,6 +465,7 @@ static const struct user_regset_view user_sparc64_view = {
.regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
};
+#ifdef CONFIG_COMPAT
static int genregs32_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
@@ -404,9 +488,22 @@ static int genregs32_get(struct task_struct *target,
*k++ = regs->u_regs[pos++];
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(*k++, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(*k++, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ k, sizeof(*k), 0)
+ != sizeof(*k))
+ return -EFAULT;
+ k++;
+ pos++;
+ }
}
} else {
for (; count > 0 && pos < 16; count--) {
@@ -415,10 +512,28 @@ static int genregs32_get(struct task_struct *target,
}
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, &reg_window[pos++]) ||
- put_user(reg, u++))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(reg, &reg_window[pos++]) ||
+ put_user(reg, u++))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ &reg, sizeof(reg), 0)
+ != sizeof(reg))
+ return -EFAULT;
+ if (access_process_vm(target,
+ (unsigned long) u,
+ &reg, sizeof(reg), 1)
+ != sizeof(reg))
+ return -EFAULT;
+ pos++;
+ u++;
+ }
}
}
while (count > 0) {
@@ -480,9 +595,23 @@ static int genregs32_set(struct task_struct *target,
regs->u_regs[pos++] = *k++;
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (put_user(*k++, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (put_user(*k++, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ (void *) k,
+ sizeof(*k), 1)
+ != sizeof(*k))
+ return -EFAULT;
+ k++;
+ pos++;
+ }
}
} else {
for (; count > 0 && pos < 16; count--) {
@@ -492,10 +621,29 @@ static int genregs32_set(struct task_struct *target,
}
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, u++) ||
- put_user(reg, &reg_window[pos++]))
- return -EFAULT;
+ if (target == current) {
+ for (; count > 0 && pos < 32; count--) {
+ if (get_user(reg, u++) ||
+ put_user(reg, &reg_window[pos++]))
+ return -EFAULT;
+ }
+ } else {
+ for (; count > 0 && pos < 32; count--) {
+ if (access_process_vm(target,
+ (unsigned long)
+ u,
+ &reg, sizeof(reg), 0)
+ != sizeof(reg))
+ return -EFAULT;
+ if (access_process_vm(target,
+ (unsigned long)
+ &reg_window[pos],
+ &reg, sizeof(reg), 1)
+ != sizeof(reg))
+ return -EFAULT;
+ pos++;
+ u++;
+ }
}
}
while (count > 0) {
@@ -676,14 +824,18 @@ static const struct user_regset_view user_sparc32_view = {
.name = "sparc", .e_machine = EM_SPARC,
.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
};
+#endif /* CONFIG_COMPAT */
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
+#ifdef CONFIG_COMPAT
if (test_tsk_thread_flag(task, TIF_32BIT))
return &user_sparc32_view;
+#endif
return &user_sparc64_view;
}
+#ifdef CONFIG_COMPAT
struct compat_fps {
unsigned int regs[32];
unsigned int fsr;
@@ -699,7 +851,7 @@ struct compat_fps {
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
compat_ulong_t caddr, compat_ulong_t cdata)
{
- const struct user_regset_view *view = task_user_regset_view(child);
+ const struct user_regset_view *view = task_user_regset_view(current);
compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
struct pt_regs32 __user *pregs;
struct compat_fps __user *fps;
@@ -798,6 +950,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
return ret;
}
+#endif /* CONFIG_COMPAT */
struct fps {
unsigned int regs[64];
@@ -806,12 +959,15 @@ struct fps {
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
- const struct user_regset_view *view = task_user_regset_view(child);
- struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
+ const struct user_regset_view *view = task_user_regset_view(current);
unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
- struct fps __user *fps = (struct fps __user *) addr;
+ struct pt_regs __user *pregs;
+ struct fps __user *fps;
int ret;
+ pregs = (struct pt_regs __user *) (unsigned long) addr;
+ fps = (struct fps __user *) (unsigned long) addr;
+
switch (request) {
case PTRACE_PEEKUSR:
ret = (addr != 0) ? -EIO : 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.