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Diffstat (limited to 'arch/mips/kernel/ptrace.c')
-rw-r--r--arch/mips/kernel/ptrace.c199
1 files changed, 147 insertions, 52 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 8ae1ebef8b71..b52e1d2b33e0 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -16,16 +16,20 @@
*/
#include <linux/compiler.h>
#include <linux/context_tracking.h>
+#include <linux/elf.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
+#include <linux/regset.h>
#include <linux/smp.h>
#include <linux/user.h>
#include <linux/security.h>
+#include <linux/tracehook.h>
#include <linux/audit.h>
#include <linux/seccomp.h>
+#include <linux/ftrace.h>
#include <asm/byteorder.h>
#include <asm/cpu.h>
@@ -35,10 +39,14 @@
#include <asm/mipsmtregs.h>
#include <asm/pgtable.h>
#include <asm/page.h>
+#include <asm/syscall.h>
#include <asm/uaccess.h>
#include <asm/bootinfo.h>
#include <asm/reg.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/syscalls.h>
+
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -255,6 +263,133 @@ int ptrace_set_watch_regs(struct task_struct *child,
return 0;
}
+/* regset get/set implementations */
+
+static int gpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ struct pt_regs *regs = task_pt_regs(target);
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs, 0, sizeof(*regs));
+}
+
+static int gpr_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 newregs;
+ int ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &newregs,
+ 0, sizeof(newregs));
+ if (ret)
+ return ret;
+
+ *task_pt_regs(target) = newregs;
+
+ return 0;
+}
+
+static int fpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fpu,
+ 0, sizeof(elf_fpregset_t));
+ /* XXX fcr31 */
+}
+
+static int fpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fpu,
+ 0, sizeof(elf_fpregset_t));
+ /* XXX fcr31 */
+}
+
+enum mips_regset {
+ REGSET_GPR,
+ REGSET_FPR,
+};
+
+static const struct user_regset mips_regsets[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(unsigned int),
+ .align = sizeof(unsigned int),
+ .get = gpr_get,
+ .set = gpr_set,
+ },
+ [REGSET_FPR] = {
+ .core_note_type = NT_PRFPREG,
+ .n = ELF_NFPREG,
+ .size = sizeof(elf_fpreg_t),
+ .align = sizeof(elf_fpreg_t),
+ .get = fpr_get,
+ .set = fpr_set,
+ },
+};
+
+static const struct user_regset_view user_mips_view = {
+ .name = "mips",
+ .e_machine = ELF_ARCH,
+ .ei_osabi = ELF_OSABI,
+ .regsets = mips_regsets,
+ .n = ARRAY_SIZE(mips_regsets),
+};
+
+static const struct user_regset mips64_regsets[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(unsigned long),
+ .align = sizeof(unsigned long),
+ .get = gpr_get,
+ .set = gpr_set,
+ },
+ [REGSET_FPR] = {
+ .core_note_type = NT_PRFPREG,
+ .n = ELF_NFPREG,
+ .size = sizeof(elf_fpreg_t),
+ .align = sizeof(elf_fpreg_t),
+ .get = fpr_get,
+ .set = fpr_set,
+ },
+};
+
+static const struct user_regset_view user_mips64_view = {
+ .name = "mips",
+ .e_machine = ELF_ARCH,
+ .ei_osabi = ELF_OSABI,
+ .regsets = mips64_regsets,
+ .n = ARRAY_SIZE(mips_regsets),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+#ifdef CONFIG_32BIT
+ return &user_mips_view;
+#endif
+
+#ifdef CONFIG_MIPS32_O32
+ if (test_thread_flag(TIF_32BIT_REGS))
+ return &user_mips_view;
+#endif
+
+ return &user_mips64_view;
+}
+
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
@@ -517,52 +652,27 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
-static inline int audit_arch(void)
-{
- int arch = EM_MIPS;
-#ifdef CONFIG_64BIT
- arch |= __AUDIT_ARCH_64BIT;
-#endif
-#if defined(__LITTLE_ENDIAN)
- arch |= __AUDIT_ARCH_LE;
-#endif
- return arch;
-}
-
/*
* Notification of system call entry/exit
* - triggered by current->work.syscall_trace
*/
asmlinkage void syscall_trace_enter(struct pt_regs *regs)
{
+ long ret = 0;
user_exit();
/* do the secure computing check first */
secure_computing_strict(regs->regs[2]);
- if (!(current->ptrace & PT_PTRACED))
- goto out;
-
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- goto out;
+ if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+ tracehook_report_syscall_entry(regs))
+ ret = -1;
- /* The 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ?
- 0x80 : 0));
-
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_enter(regs, regs->regs[2]);
-out:
- audit_syscall_entry(audit_arch(), regs->regs[2],
+ audit_syscall_entry(__syscall_get_arch(),
+ regs->regs[2],
regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
}
@@ -582,26 +692,11 @@ asmlinkage void syscall_trace_leave(struct pt_regs *regs)
audit_syscall_exit(regs);
- if (!(current->ptrace & PT_PTRACED))
- return;
-
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
-
- /* The 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ?
- 0x80 : 0));
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_exit(regs, regs->regs[2]);
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, 0);
user_enter();
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-02 22:20:06 +0000