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Diffstat (limited to 'arch/mips/kernel/ptrace.c')
-rw-r--r--arch/mips/kernel/ptrace.c192
1 files changed, 162 insertions, 30 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 7da9b76db4d9..60f48febe762 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -170,6 +170,7 @@ int ptrace_setfpregs(struct task_struct *child, __u32 __user *data)
__get_user(fregs[i], i + (__u64 __user *) data);
__get_user(child->thread.fpu.fcr31, data + 64);
+ child->thread.fpu.fcr31 &= ~FPU_CSR_ALL_X;
/* FIR may not be written. */
@@ -265,36 +266,160 @@ int ptrace_set_watch_regs(struct task_struct *child,
/* 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)
+#if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
+
+static int gpr32_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);
+ u32 uregs[ELF_NGREG] = {};
+ unsigned i;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs, 0, sizeof(*regs));
+ for (i = MIPS32_EF_R1; i <= MIPS32_EF_R31; i++) {
+ /* k0/k1 are copied as zero. */
+ if (i == MIPS32_EF_R26 || i == MIPS32_EF_R27)
+ continue;
+
+ uregs[i] = regs->regs[i - MIPS32_EF_R0];
+ }
+
+ uregs[MIPS32_EF_LO] = regs->lo;
+ uregs[MIPS32_EF_HI] = regs->hi;
+ uregs[MIPS32_EF_CP0_EPC] = regs->cp0_epc;
+ uregs[MIPS32_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
+ uregs[MIPS32_EF_CP0_STATUS] = regs->cp0_status;
+ uregs[MIPS32_EF_CP0_CAUSE] = regs->cp0_cause;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0,
+ sizeof(uregs));
}
-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)
+static int gpr32_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;
+ struct pt_regs *regs = task_pt_regs(target);
+ u32 uregs[ELF_NGREG];
+ unsigned start, num_regs, i;
+ int err;
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &newregs,
- 0, sizeof(newregs));
- if (ret)
- return ret;
+ start = pos / sizeof(u32);
+ num_regs = count / sizeof(u32);
- *task_pt_regs(target) = newregs;
+ if (start + num_regs > ELF_NGREG)
+ return -EIO;
+
+ err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0,
+ sizeof(uregs));
+ if (err)
+ return err;
+
+ for (i = start; i < num_regs; i++) {
+ /*
+ * Cast all values to signed here so that if this is a 64-bit
+ * kernel, the supplied 32-bit values will be sign extended.
+ */
+ switch (i) {
+ case MIPS32_EF_R1 ... MIPS32_EF_R25:
+ /* k0/k1 are ignored. */
+ case MIPS32_EF_R28 ... MIPS32_EF_R31:
+ regs->regs[i - MIPS32_EF_R0] = (s32)uregs[i];
+ break;
+ case MIPS32_EF_LO:
+ regs->lo = (s32)uregs[i];
+ break;
+ case MIPS32_EF_HI:
+ regs->hi = (s32)uregs[i];
+ break;
+ case MIPS32_EF_CP0_EPC:
+ regs->cp0_epc = (s32)uregs[i];
+ break;
+ }
+ }
return 0;
}
+#endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
+
+#ifdef CONFIG_64BIT
+
+static int gpr64_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);
+ u64 uregs[ELF_NGREG] = {};
+ unsigned i;
+
+ for (i = MIPS64_EF_R1; i <= MIPS64_EF_R31; i++) {
+ /* k0/k1 are copied as zero. */
+ if (i == MIPS64_EF_R26 || i == MIPS64_EF_R27)
+ continue;
+
+ uregs[i] = regs->regs[i - MIPS64_EF_R0];
+ }
+
+ uregs[MIPS64_EF_LO] = regs->lo;
+ uregs[MIPS64_EF_HI] = regs->hi;
+ uregs[MIPS64_EF_CP0_EPC] = regs->cp0_epc;
+ uregs[MIPS64_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
+ uregs[MIPS64_EF_CP0_STATUS] = regs->cp0_status;
+ uregs[MIPS64_EF_CP0_CAUSE] = regs->cp0_cause;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0,
+ sizeof(uregs));
+}
+
+static int gpr64_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 = task_pt_regs(target);
+ u64 uregs[ELF_NGREG];
+ unsigned start, num_regs, i;
+ int err;
+
+ start = pos / sizeof(u64);
+ num_regs = count / sizeof(u64);
+
+ if (start + num_regs > ELF_NGREG)
+ return -EIO;
+
+ err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0,
+ sizeof(uregs));
+ if (err)
+ return err;
+
+ for (i = start; i < num_regs; i++) {
+ switch (i) {
+ case MIPS64_EF_R1 ... MIPS64_EF_R25:
+ /* k0/k1 are ignored. */
+ case MIPS64_EF_R28 ... MIPS64_EF_R31:
+ regs->regs[i - MIPS64_EF_R0] = uregs[i];
+ break;
+ case MIPS64_EF_LO:
+ regs->lo = uregs[i];
+ break;
+ case MIPS64_EF_HI:
+ regs->hi = uregs[i];
+ break;
+ case MIPS64_EF_CP0_EPC:
+ regs->cp0_epc = uregs[i];
+ break;
+ }
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_64BIT */
+
static int fpr_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
@@ -322,14 +447,16 @@ enum mips_regset {
REGSET_FPR,
};
+#if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
+
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,
+ .get = gpr32_get,
+ .set = gpr32_set,
},
[REGSET_FPR] = {
.core_note_type = NT_PRFPREG,
@@ -349,14 +476,18 @@ static const struct user_regset_view user_mips_view = {
.n = ARRAY_SIZE(mips_regsets),
};
+#endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
+
+#ifdef CONFIG_64BIT
+
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,
+ .get = gpr64_get,
+ .set = gpr64_set,
},
[REGSET_FPR] = {
.core_note_type = NT_PRFPREG,
@@ -369,25 +500,26 @@ static const struct user_regset mips64_regsets[] = {
};
static const struct user_regset_view user_mips64_view = {
- .name = "mips",
+ .name = "mips64",
.e_machine = ELF_ARCH,
.ei_osabi = ELF_OSABI,
.regsets = mips64_regsets,
- .n = ARRAY_SIZE(mips_regsets),
+ .n = ARRAY_SIZE(mips64_regsets),
};
+#endif /* CONFIG_64BIT */
+
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
#ifdef CONFIG_32BIT
return &user_mips_view;
-#endif
-
+#else
#ifdef CONFIG_MIPS32_O32
- if (test_thread_flag(TIF_32BIT_REGS))
- return &user_mips_view;
+ if (test_tsk_thread_flag(task, TIF_32BIT_REGS))
+ return &user_mips_view;
#endif
-
return &user_mips64_view;
+#endif
}
long arch_ptrace(struct task_struct *child, long request,
@@ -593,7 +725,7 @@ long arch_ptrace(struct task_struct *child, long request,
break;
#endif
case FPC_CSR:
- child->thread.fpu.fcr31 = data;
+ child->thread.fpu.fcr31 = data & ~FPU_CSR_ALL_X;
break;
case DSP_BASE ... DSP_BASE + 5: {
dspreg_t *dregs;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 07:08:41 +0000