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Diffstat (limited to 'arch/csky/kernel/ptrace.c')
-rw-r--r--arch/csky/kernel/ptrace.c197
1 files changed, 147 insertions, 50 deletions
diff --git a/arch/csky/kernel/ptrace.c b/arch/csky/kernel/ptrace.c
index 944ca2fdcdd9..6bb685a2646b 100644
--- a/arch/csky/kernel/ptrace.c
+++ b/arch/csky/kernel/ptrace.c
@@ -12,7 +12,6 @@
#include <linux/sched/task_stack.h>
#include <linux/signal.h>
#include <linux/smp.h>
-#include <linux/tracehook.h>
#include <linux/uaccess.h>
#include <linux/user.h>
@@ -22,6 +21,7 @@
#include <asm/asm-offsets.h>
#include <abi/regdef.h>
+#include <abi/ckmmu.h>
#define CREATE_TRACE_POINTS
#include <trace/events/syscalls.h>
@@ -76,17 +76,14 @@ enum csky_regset {
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 membuf to)
{
- struct pt_regs *regs;
-
- regs = task_pt_regs(target);
+ struct pt_regs *regs = task_pt_regs(target);
/* Abiv1 regs->tls is fake and we need sync here. */
regs->tls = task_thread_info(target)->tp_value;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs, 0, -1);
+ return membuf_write(&to, regs, sizeof(*regs));
}
static int gpr_set(struct task_struct *target,
@@ -101,7 +98,8 @@ static int gpr_set(struct task_struct *target,
if (ret)
return ret;
- regs.sr = task_pt_regs(target)->sr;
+ /* BIT(0) of regs.sr is Condition Code/Carry bit */
+ regs.sr = (regs.sr & BIT(0)) | (task_pt_regs(target)->sr & ~BIT(0));
#ifdef CONFIG_CPU_HAS_HILO
regs.dcsr = task_pt_regs(target)->dcsr;
#endif
@@ -114,8 +112,7 @@ static int gpr_set(struct task_struct *target,
static int fpr_get(struct task_struct *target,
const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
+ struct membuf to)
{
struct user_fp *regs = (struct user_fp *)&target->thread.user_fp;
@@ -131,9 +128,9 @@ static int fpr_get(struct task_struct *target,
for (i = 0; i < 32; i++)
tmp.vr[64 + i] = regs->vr[32 + i];
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &tmp, 0, -1);
+ return membuf_write(&to, &tmp, sizeof(tmp));
#else
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs, 0, -1);
+ return membuf_write(&to, regs, sizeof(*regs));
#endif
}
@@ -169,20 +166,20 @@ static int fpr_set(struct task_struct *target,
static const struct user_regset csky_regsets[] = {
[REGSET_GPR] = {
- .core_note_type = NT_PRSTATUS,
+ USER_REGSET_NOTE_TYPE(PRSTATUS),
.n = sizeof(struct pt_regs) / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
- .get = &gpr_get,
- .set = &gpr_set,
+ .regset_get = gpr_get,
+ .set = gpr_set,
},
[REGSET_FPR] = {
- .core_note_type = NT_PRFPREG,
+ USER_REGSET_NOTE_TYPE(PRFPREG),
.n = sizeof(struct user_fp) / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
- .get = &fpr_get,
- .set = &fpr_set,
+ .regset_get = fpr_get,
+ .set = fpr_set,
},
};
@@ -320,16 +317,20 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
-asmlinkage void syscall_trace_enter(struct pt_regs *regs)
+asmlinkage int syscall_trace_enter(struct pt_regs *regs)
{
if (test_thread_flag(TIF_SYSCALL_TRACE))
- if (tracehook_report_syscall_entry(regs))
- syscall_set_nr(current, regs, -1);
+ if (ptrace_report_syscall_entry(regs))
+ return -1;
+
+ if (secure_computing() == -1)
+ return -1;
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, syscall_get_nr(current, regs));
audit_syscall_entry(regs_syscallid(regs), regs->a0, regs->a1, regs->a2, regs->a3);
+ return 0;
}
asmlinkage void syscall_trace_exit(struct pt_regs *regs)
@@ -337,19 +338,132 @@ asmlinkage void syscall_trace_exit(struct pt_regs *regs)
audit_syscall_exit(regs);
if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
+ ptrace_report_syscall_exit(regs, 0);
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_exit(regs, syscall_get_return_value(current, regs));
}
-extern void show_stack(struct task_struct *task, unsigned long *stack, const char *loglvl);
-void show_regs(struct pt_regs *fp)
+#ifdef CONFIG_CPU_CK860
+static void show_iutlb(void)
{
- unsigned long *sp;
- unsigned char *tp;
- int i;
+ int entry, i;
+ unsigned long flags;
+ unsigned long oldpid;
+ unsigned long entryhi[16], entrylo0[16], entrylo1[16];
+
+ oldpid = read_mmu_entryhi();
+
+ entry = 0x8000;
+
+ local_irq_save(flags);
+
+ for (i = 0; i < 16; i++) {
+ write_mmu_index(entry);
+ tlb_read();
+ entryhi[i] = read_mmu_entryhi();
+ entrylo0[i] = read_mmu_entrylo0();
+ entrylo1[i] = read_mmu_entrylo1();
+
+ entry++;
+ }
+
+ local_irq_restore(flags);
+
+ write_mmu_entryhi(oldpid);
+
+ printk("\n\n\n");
+ for (i = 0; i < 16; i++)
+ printk("iutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
+ " entrylo1 - 0x%lx\n",
+ i, entryhi[i], entrylo0[i], entrylo1[i]);
+ printk("\n\n\n");
+}
+
+static void show_dutlb(void)
+{
+ int entry, i;
+ unsigned long flags;
+ unsigned long oldpid;
+ unsigned long entryhi[16], entrylo0[16], entrylo1[16];
+
+ oldpid = read_mmu_entryhi();
+
+ entry = 0x4000;
+
+ local_irq_save(flags);
+
+ for (i = 0; i < 16; i++) {
+ write_mmu_index(entry);
+ tlb_read();
+ entryhi[i] = read_mmu_entryhi();
+ entrylo0[i] = read_mmu_entrylo0();
+ entrylo1[i] = read_mmu_entrylo1();
+
+ entry++;
+ }
+
+ local_irq_restore(flags);
+
+ write_mmu_entryhi(oldpid);
+ printk("\n\n\n");
+ for (i = 0; i < 16; i++)
+ printk("dutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
+ " entrylo1 - 0x%lx\n",
+ i, entryhi[i], entrylo0[i], entrylo1[i]);
+ printk("\n\n\n");
+}
+
+static unsigned long entryhi[1024], entrylo0[1024], entrylo1[1024];
+static void show_jtlb(void)
+{
+ int entry;
+ unsigned long flags;
+ unsigned long oldpid;
+
+ oldpid = read_mmu_entryhi();
+
+ entry = 0;
+
+ local_irq_save(flags);
+ while (entry < 1024) {
+ write_mmu_index(entry);
+ tlb_read();
+ entryhi[entry] = read_mmu_entryhi();
+ entrylo0[entry] = read_mmu_entrylo0();
+ entrylo1[entry] = read_mmu_entrylo1();
+
+ entry++;
+ }
+ local_irq_restore(flags);
+
+ write_mmu_entryhi(oldpid);
+
+ printk("\n\n\n");
+
+ for (entry = 0; entry < 1024; entry++)
+ printk("jtlb[%x]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
+ " entrylo1 - 0x%lx\n",
+ entry, entryhi[entry], entrylo0[entry], entrylo1[entry]);
+ printk("\n\n\n");
+}
+
+static void show_tlb(void)
+{
+ show_iutlb();
+ show_dutlb();
+ show_jtlb();
+}
+#else
+static void show_tlb(void)
+{
+ return;
+}
+#endif
+
+void show_regs(struct pt_regs *fp)
+{
pr_info("\nCURRENT PROCESS:\n\n");
pr_info("COMM=%s PID=%d\n", current->comm, current->pid);
@@ -368,9 +482,10 @@ void show_regs(struct pt_regs *fp)
pr_info("PC: 0x%08lx (%pS)\n", (long)fp->pc, (void *)fp->pc);
pr_info("LR: 0x%08lx (%pS)\n", (long)fp->lr, (void *)fp->lr);
- pr_info("SP: 0x%08lx\n", (long)fp);
- pr_info("orig_a0: 0x%08lx\n", fp->orig_a0);
+ pr_info("SP: 0x%08lx\n", (long)fp->usp);
pr_info("PSR: 0x%08lx\n", (long)fp->sr);
+ pr_info("orig_a0: 0x%08lx\n", fp->orig_a0);
+ pr_info("PT_REGS: 0x%08lx\n", (long)fp);
pr_info(" a0: 0x%08lx a1: 0x%08lx a2: 0x%08lx a3: 0x%08lx\n",
fp->a0, fp->a1, fp->a2, fp->a3);
@@ -396,29 +511,11 @@ void show_regs(struct pt_regs *fp)
fp->regs[0], fp->regs[1], fp->regs[2], fp->regs[3]);
pr_info("r10: 0x%08lx r11: 0x%08lx r12: 0x%08lx r13: 0x%08lx\n",
fp->regs[4], fp->regs[5], fp->regs[6], fp->regs[7]);
- pr_info("r14: 0x%08lx r1: 0x%08lx r15: 0x%08lx\n",
- fp->regs[8], fp->regs[9], fp->lr);
+ pr_info("r14: 0x%08lx r1: 0x%08lx\n",
+ fp->regs[8], fp->regs[9]);
#endif
- pr_info("\nCODE:");
- tp = ((unsigned char *) fp->pc) - 0x20;
- tp += ((int)tp % 4) ? 2 : 0;
- for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
- if ((i % 0x10) == 0)
- pr_cont("\n%08x: ", (int) (tp + i));
- pr_cont("%08x ", (int) *sp++);
- }
- pr_cont("\n");
-
- pr_info("\nKERNEL STACK:");
- tp = ((unsigned char *) fp) - 0x40;
- for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
- if ((i % 0x10) == 0)
- pr_cont("\n%08x: ", (int) (tp + i));
- pr_cont("%08x ", (int) *sp++);
- }
- pr_cont("\n");
+ show_tlb();
- show_stack(NULL, (unsigned long *)fp->regs[4], KERN_INFO);
return;
}
generated by cgit (git 2.34.1) at 2025-12-25 22:18:56 +0000