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-rw-r--r--arch/arc/kernel/Makefile4
-rw-r--r--arch/arc/kernel/disasm.c67
-rw-r--r--arch/arc/kernel/entry.S13
-rw-r--r--arch/arc/kernel/jump_label.c13
-rw-r--r--arch/arc/kernel/perf_event.c166
-rw-r--r--arch/arc/kernel/process.c15
-rw-r--r--arch/arc/kernel/ptrace.c141
-rw-r--r--arch/arc/kernel/signal.c6
-rw-r--r--arch/arc/kernel/smp.c14
-rw-r--r--arch/arc/kernel/unaligned.c2
-rw-r--r--arch/arc/kernel/unwind.c11
11 files changed, 391 insertions, 61 deletions
diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile
index 8c4fc4b54c14..0723d888ac44 100644
--- a/arch/arc/kernel/Makefile
+++ b/arch/arc/kernel/Makefile
@@ -3,7 +3,7 @@
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
-obj-y := arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
+obj-y := head.o arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o
obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o
obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o
@@ -31,4 +31,4 @@ else
obj-y += ctx_sw_asm.o
endif
-extra-y := vmlinux.lds head.o
+extra-y := vmlinux.lds
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c
index 03f8b1be0c3a..ccc7e8c39eb3 100644
--- a/arch/arc/kernel/disasm.c
+++ b/arch/arc/kernel/disasm.c
@@ -366,7 +366,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state,
case op_SP: /* LD_S|LDB_S b,[sp,u7], ST_S|STB_S b,[sp,u7] */
/* note: we are ignoring possibility of:
* ADD_S, SUB_S, PUSH_S, POP_S as these should not
- * cause unaliged exception anyway */
+ * cause unaligned exception anyway */
state->write = BITS(state->words[0], 6, 6);
state->zz = BITS(state->words[0], 5, 5);
if (state->zz)
@@ -434,14 +434,31 @@ long __kprobes get_reg(int reg, struct pt_regs *regs,
{
long *p;
+#if defined(CONFIG_ISA_ARCOMPACT)
if (reg <= 12) {
p = &regs->r0;
return p[-reg];
}
+#else /* CONFIG_ISA_ARCV2 */
+ if (reg <= 11) {
+ p = &regs->r0;
+ return p[reg];
+ }
+ if (reg == 12)
+ return regs->r12;
+ if (reg == 30)
+ return regs->r30;
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ if (reg == 58)
+ return regs->r58;
+ if (reg == 59)
+ return regs->r59;
+#endif
+#endif
if (cregs && (reg <= 25)) {
p = &cregs->r13;
- return p[13-reg];
+ return p[13 - reg];
}
if (reg == 26)
@@ -461,6 +478,7 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs,
{
long *p;
+#if defined(CONFIG_ISA_ARCOMPACT)
switch (reg) {
case 0 ... 12:
p = &regs->r0;
@@ -469,7 +487,7 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs,
case 13 ... 25:
if (cregs) {
p = &cregs->r13;
- p[13-reg] = val;
+ p[13 - reg] = val;
}
break;
case 26:
@@ -487,6 +505,48 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs,
default:
break;
}
+#else /* CONFIG_ISA_ARCV2 */
+ switch (reg) {
+ case 0 ... 11:
+ p = &regs->r0;
+ p[reg] = val;
+ break;
+ case 12:
+ regs->r12 = val;
+ break;
+ case 13 ... 25:
+ if (cregs) {
+ p = &cregs->r13;
+ p[13 - reg] = val;
+ }
+ break;
+ case 26:
+ regs->r26 = val;
+ break;
+ case 27:
+ regs->fp = val;
+ break;
+ case 28:
+ regs->sp = val;
+ break;
+ case 30:
+ regs->r30 = val;
+ break;
+ case 31:
+ regs->blink = val;
+ break;
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ case 58:
+ regs->r58 = val;
+ break;
+ case 59:
+ regs->r59 = val;
+ break;
+#endif
+ default:
+ break;
+ }
+#endif
}
/*
@@ -503,7 +563,6 @@ int __kprobes disasm_next_pc(unsigned long pc, struct pt_regs *regs,
{
struct disasm_state instr;
- memset(&instr, 0, sizeof(struct disasm_state));
disasm_instr(pc, &instr, 0, regs, cregs);
*next_pc = pc + instr.instr_len;
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index dd77a0c8f740..54e91df678dd 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -29,8 +29,8 @@ ENTRY(sys_clone_wrapper)
DISCARD_CALLEE_SAVED_USER
GET_CURR_THR_INFO_FLAGS r10
- btst r10, TIF_SYSCALL_TRACE
- bnz tracesys_exit
+ and.f 0, r10, _TIF_SYSCALL_WORK
+ bnz tracesys_exit
b .Lret_from_system_call
END(sys_clone_wrapper)
@@ -41,8 +41,8 @@ ENTRY(sys_clone3_wrapper)
DISCARD_CALLEE_SAVED_USER
GET_CURR_THR_INFO_FLAGS r10
- btst r10, TIF_SYSCALL_TRACE
- bnz tracesys_exit
+ and.f 0, r10, _TIF_SYSCALL_WORK
+ bnz tracesys_exit
b .Lret_from_system_call
END(sys_clone3_wrapper)
@@ -196,6 +196,7 @@ tracesys_exit:
st r0, [sp, PT_r0] ; sys call return value in pt_regs
;POST Sys Call Ptrace Hook
+ mov r0, sp ; pt_regs needed
bl @syscall_trace_exit
b ret_from_exception ; NOT ret_from_system_call at is saves r0 which
; we'd done before calling post hook above
@@ -246,8 +247,8 @@ ENTRY(EV_Trap)
; If syscall tracing ongoing, invoke pre-post-hooks
GET_CURR_THR_INFO_FLAGS r10
- btst r10, TIF_SYSCALL_TRACE
- bnz tracesys ; this never comes back
+ and.f 0, r10, _TIF_SYSCALL_WORK
+ bnz tracesys ; this never comes back
;============ Normal syscall case
diff --git a/arch/arc/kernel/jump_label.c b/arch/arc/kernel/jump_label.c
index b8600dc325b5..70b74a5d047b 100644
--- a/arch/arc/kernel/jump_label.c
+++ b/arch/arc/kernel/jump_label.c
@@ -96,19 +96,6 @@ void arch_jump_label_transform(struct jump_entry *entry,
flush_icache_range(entry->code, entry->code + JUMP_LABEL_NOP_SIZE);
}
-void arch_jump_label_transform_static(struct jump_entry *entry,
- enum jump_label_type type)
-{
- /*
- * We use only one NOP type (1x, 4 byte) in arch_static_branch, so
- * there's no need to patch an identical NOP over the top of it here.
- * The generic code calls 'arch_jump_label_transform' if the NOP needs
- * to be replaced by a branch, so 'arch_jump_label_transform_static' is
- * never called with type other than JUMP_LABEL_NOP.
- */
- BUG_ON(type != JUMP_LABEL_NOP);
-}
-
#ifdef CONFIG_ARC_DBG_JUMP_LABEL
#define SELFTEST_MSG "ARC: instruction generation self-test: "
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 145722f80c9b..adff957962da 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -17,6 +17,168 @@
/* HW holds 8 symbols + one for null terminator */
#define ARCPMU_EVENT_NAME_LEN 9
+/*
+ * Some ARC pct quirks:
+ *
+ * PERF_COUNT_HW_STALLED_CYCLES_BACKEND
+ * PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
+ * The ARC 700 can either measure stalls per pipeline stage, or all stalls
+ * combined; for now we assign all stalls to STALLED_CYCLES_BACKEND
+ * and all pipeline flushes (e.g. caused by mispredicts, etc.) to
+ * STALLED_CYCLES_FRONTEND.
+ *
+ * We could start multiple performance counters and combine everything
+ * afterwards, but that makes it complicated.
+ *
+ * Note that I$ cache misses aren't counted by either of the two!
+ */
+
+/*
+ * ARC PCT has hardware conditions with fixed "names" but variable "indexes"
+ * (based on a specific RTL build)
+ * Below is the static map between perf generic/arc specific event_id and
+ * h/w condition names.
+ * At the time of probe, we loop thru each index and find it's name to
+ * complete the mapping of perf event_id to h/w index as latter is needed
+ * to program the counter really
+ */
+static const char * const arc_pmu_ev_hw_map[] = {
+ /* count cycles */
+ [PERF_COUNT_HW_CPU_CYCLES] = "crun",
+ [PERF_COUNT_HW_REF_CPU_CYCLES] = "crun",
+ [PERF_COUNT_HW_BUS_CYCLES] = "crun",
+
+ [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = "bflush",
+ [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = "bstall",
+
+ /* counts condition */
+ [PERF_COUNT_HW_INSTRUCTIONS] = "iall",
+ /* All jump instructions that are taken */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmptak",
+#ifdef CONFIG_ISA_ARCV2
+ [PERF_COUNT_HW_BRANCH_MISSES] = "bpmp",
+#else
+ [PERF_COUNT_ARC_BPOK] = "bpok", /* NP-NT, PT-T, PNT-NT */
+ [PERF_COUNT_HW_BRANCH_MISSES] = "bpfail", /* NP-T, PT-NT, PNT-T */
+#endif
+ [PERF_COUNT_ARC_LDC] = "imemrdc", /* Instr: mem read cached */
+ [PERF_COUNT_ARC_STC] = "imemwrc", /* Instr: mem write cached */
+
+ [PERF_COUNT_ARC_DCLM] = "dclm", /* D-cache Load Miss */
+ [PERF_COUNT_ARC_DCSM] = "dcsm", /* D-cache Store Miss */
+ [PERF_COUNT_ARC_ICM] = "icm", /* I-cache Miss */
+ [PERF_COUNT_ARC_EDTLB] = "edtlb", /* D-TLB Miss */
+ [PERF_COUNT_ARC_EITLB] = "eitlb", /* I-TLB Miss */
+
+ [PERF_COUNT_HW_CACHE_REFERENCES] = "imemrdc", /* Instr: mem read cached */
+ [PERF_COUNT_HW_CACHE_MISSES] = "dclm", /* D-cache Load Miss */
+};
+
+#define C(_x) PERF_COUNT_HW_CACHE_##_x
+#define CACHE_OP_UNSUPPORTED 0xffff
+
+static const unsigned int arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = PERF_COUNT_ARC_LDC,
+ [C(RESULT_MISS)] = PERF_COUNT_ARC_DCLM,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = PERF_COUNT_ARC_STC,
+ [C(RESULT_MISS)] = PERF_COUNT_ARC_DCSM,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = PERF_COUNT_HW_INSTRUCTIONS,
+ [C(RESULT_MISS)] = PERF_COUNT_ARC_ICM,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = PERF_COUNT_ARC_LDC,
+ [C(RESULT_MISS)] = PERF_COUNT_ARC_EDTLB,
+ },
+ /* DTLB LD/ST Miss not segregated by h/w*/
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = PERF_COUNT_ARC_EITLB,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = PERF_COUNT_HW_BRANCH_INSTRUCTIONS,
+ [C(RESULT_MISS)] = PERF_COUNT_HW_BRANCH_MISSES,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(NODE)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
enum arc_pmu_attr_groups {
ARCPMU_ATTR_GR_EVENTS,
ARCPMU_ATTR_GR_FORMATS,
@@ -328,7 +490,7 @@ static void arc_pmu_stop(struct perf_event *event, int flags)
}
if (!(event->hw.state & PERF_HES_STOPPED)) {
- /* stop ARC pmu here */
+ /* stop hw counter here */
write_aux_reg(ARC_REG_PCT_INDEX, idx);
/* condition code #0 is always "never" */
@@ -361,7 +523,7 @@ static int arc_pmu_add(struct perf_event *event, int flags)
{
struct arc_pmu_cpu *pmu_cpu = this_cpu_ptr(&arc_pmu_cpu);
struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
+ int idx;
idx = ffz(pmu_cpu->used_mask[0]);
if (idx == arc_pmu->n_counters)
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index 8e90052f6f05..3369f0700702 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -43,7 +43,7 @@ SYSCALL_DEFINE0(arc_gettls)
return task_thread_info(current)->thr_ptr;
}
-SYSCALL_DEFINE3(arc_usr_cmpxchg, int *, uaddr, int, expected, int, new)
+SYSCALL_DEFINE3(arc_usr_cmpxchg, int __user *, uaddr, int, expected, int, new)
{
struct pt_regs *regs = current_pt_regs();
u32 uval;
@@ -162,10 +162,11 @@ asmlinkage void ret_from_fork(void);
* | user_r25 |
* ------------------ <===== END of PAGE
*/
-int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long kthread_arg, struct task_struct *p,
- unsigned long tls)
+int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
{
+ unsigned long clone_flags = args->flags;
+ unsigned long usp = args->stack;
+ unsigned long tls = args->tls;
struct pt_regs *c_regs; /* child's pt_regs */
unsigned long *childksp; /* to unwind out of __switch_to() */
struct callee_regs *c_callee; /* child's callee regs */
@@ -191,11 +192,11 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childksp[0] = 0; /* fp */
childksp[1] = (unsigned long)ret_from_fork; /* blink */
- if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
+ if (unlikely(args->fn)) {
memset(c_regs, 0, sizeof(struct pt_regs));
- c_callee->r13 = kthread_arg;
- c_callee->r14 = usp; /* function */
+ c_callee->r13 = (unsigned long)args->fn_arg;
+ c_callee->r14 = (unsigned long)args->fn;
return 0;
}
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index 883391977fdf..da7542cea0d8 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -4,12 +4,97 @@
*/
#include <linux/ptrace.h>
-#include <linux/tracehook.h>
#include <linux/sched/task_stack.h>
#include <linux/regset.h>
#include <linux/unistd.h>
#include <linux/elf.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/syscalls.h>
+
+struct pt_regs_offset {
+ const char *name;
+ int offset;
+};
+
+#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+#ifdef CONFIG_ISA_ARCOMPACT
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_NAME(bta),
+ REG_OFFSET_NAME(lp_start),
+ REG_OFFSET_NAME(lp_end),
+ REG_OFFSET_NAME(lp_count),
+ REG_OFFSET_NAME(status32),
+ REG_OFFSET_NAME(ret),
+ REG_OFFSET_NAME(blink),
+ REG_OFFSET_NAME(fp),
+ REG_OFFSET_NAME(r26),
+ REG_OFFSET_NAME(r12),
+ REG_OFFSET_NAME(r11),
+ REG_OFFSET_NAME(r10),
+ REG_OFFSET_NAME(r9),
+ REG_OFFSET_NAME(r8),
+ REG_OFFSET_NAME(r7),
+ REG_OFFSET_NAME(r6),
+ REG_OFFSET_NAME(r5),
+ REG_OFFSET_NAME(r4),
+ REG_OFFSET_NAME(r3),
+ REG_OFFSET_NAME(r2),
+ REG_OFFSET_NAME(r1),
+ REG_OFFSET_NAME(r0),
+ REG_OFFSET_NAME(sp),
+ REG_OFFSET_NAME(orig_r0),
+ REG_OFFSET_NAME(event),
+ REG_OFFSET_NAME(user_r25),
+ REG_OFFSET_END,
+};
+
+#else
+
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_NAME(orig_r0),
+ REG_OFFSET_NAME(event),
+ REG_OFFSET_NAME(bta),
+ REG_OFFSET_NAME(user_r25),
+ REG_OFFSET_NAME(r26),
+ REG_OFFSET_NAME(fp),
+ REG_OFFSET_NAME(sp),
+ REG_OFFSET_NAME(r12),
+ REG_OFFSET_NAME(r30),
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ REG_OFFSET_NAME(r58),
+ REG_OFFSET_NAME(r59),
+#endif
+#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
+ REG_OFFSET_NAME(DSP_CTRL),
+#endif
+ REG_OFFSET_NAME(r0),
+ REG_OFFSET_NAME(r1),
+ REG_OFFSET_NAME(r2),
+ REG_OFFSET_NAME(r3),
+ REG_OFFSET_NAME(r4),
+ REG_OFFSET_NAME(r5),
+ REG_OFFSET_NAME(r6),
+ REG_OFFSET_NAME(r7),
+ REG_OFFSET_NAME(r8),
+ REG_OFFSET_NAME(r9),
+ REG_OFFSET_NAME(r10),
+ REG_OFFSET_NAME(r11),
+ REG_OFFSET_NAME(blink),
+ REG_OFFSET_NAME(lp_end),
+ REG_OFFSET_NAME(lp_start),
+ REG_OFFSET_NAME(lp_count),
+ REG_OFFSET_NAME(ei),
+ REG_OFFSET_NAME(ldi),
+ REG_OFFSET_NAME(jli),
+ REG_OFFSET_NAME(ret),
+ REG_OFFSET_NAME(status32),
+ REG_OFFSET_END,
+};
+#endif
+
static struct callee_regs *task_callee_regs(struct task_struct *tsk)
{
struct callee_regs *tmp = (struct callee_regs *)tsk->thread.callee_reg;
@@ -258,13 +343,61 @@ long arch_ptrace(struct task_struct *child, long request,
asmlinkage int syscall_trace_entry(struct pt_regs *regs)
{
- if (tracehook_report_syscall_entry(regs))
- return ULONG_MAX;
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ if (ptrace_report_syscall_entry(regs))
+ return ULONG_MAX;
+
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+ if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+ trace_sys_enter(regs, syscall_get_nr(current, regs));
+#endif
return regs->r8;
}
asmlinkage void syscall_trace_exit(struct pt_regs *regs)
{
- tracehook_report_syscall_exit(regs, 0);
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ ptrace_report_syscall_exit(regs, 0);
+
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+ if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+ trace_sys_exit(regs, regs_return_value(regs));
+#endif
+}
+
+int regs_query_register_offset(const char *name)
+{
+ const struct pt_regs_offset *roff;
+
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (!strcmp(roff->name, name))
+ return roff->offset;
+ return -EINVAL;
+}
+
+const char *regs_query_register_name(unsigned int offset)
+{
+ const struct pt_regs_offset *roff;
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (roff->offset == offset)
+ return roff->name;
+ return NULL;
+}
+
+bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr)
+{
+ return (addr & ~(THREAD_SIZE - 1)) ==
+ (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1));
+}
+
+unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
+{
+ unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
+
+ addr += n;
+ if (regs_within_kernel_stack(regs, (unsigned long)addr))
+ return *addr;
+ else
+ return 0;
}
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index cb2f88502baf..3c1590c27fae 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -49,7 +49,7 @@
#include <linux/personality.h>
#include <linux/uaccess.h>
#include <linux/syscalls.h>
-#include <linux/tracehook.h>
+#include <linux/resume_user_mode.h>
#include <linux/sched/task_stack.h>
#include <asm/ucontext.h>
@@ -319,7 +319,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
regs->ret = (unsigned long)ksig->ka.sa.sa_handler;
/*
- * handler returns using sigreturn stub provided already by userpsace
+ * handler returns using sigreturn stub provided already by userspace
* If not, nuke the process right away
*/
if(!(ksig->ka.sa.sa_flags & SA_RESTORER))
@@ -438,5 +438,5 @@ void do_notify_resume(struct pt_regs *regs)
* user mode
*/
if (test_thread_flag(TIF_NOTIFY_RESUME))
- tracehook_notify_resume(regs);
+ resume_user_mode_work(regs);
}
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 78e6d069b1c1..ad93fe6e4b77 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -35,7 +35,7 @@ EXPORT_SYMBOL_GPL(smp_atomic_ops_lock);
struct plat_smp_ops __weak plat_smp_ops;
-/* XXX: per cpu ? Only needed once in early seconday boot */
+/* XXX: per cpu ? Only needed once in early secondary boot */
struct task_struct *secondary_idle_tsk;
/* Called from start_kernel */
@@ -232,14 +232,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
return 0;
}
-/*
- * not supported here
- */
-int setup_profiling_timer(unsigned int multiplier)
-{
- return -EINVAL;
-}
-
/*****************************************************************************/
/* Inter Processor Interrupt Handling */
/*****************************************************************************/
@@ -274,7 +266,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
* and read back old value
*/
do {
- new = old = READ_ONCE(*ipi_data_ptr);
+ new = old = *ipi_data_ptr;
new |= 1U << msg;
} while (cmpxchg(ipi_data_ptr, old, new) != old);
@@ -393,7 +385,7 @@ irqreturn_t do_IPI(int irq, void *dev_id)
* API called by platform code to hookup arch-common ISR to their IPI IRQ
*
* Note: If IPI is provided by platform (vs. say ARC MCIP), their intc setup/map
- * function needs to call call irq_set_percpu_devid() for IPI IRQ, otherwise
+ * function needs to call irq_set_percpu_devid() for IPI IRQ, otherwise
* request_percpu_irq() below will fail
*/
static DEFINE_PER_CPU(int, ipi_dev);
diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
index d63ebd81f1c6..99a9b92ed98d 100644
--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -237,7 +237,7 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
if (state.fault)
goto fault;
- /* clear any remanants of delay slot */
+ /* clear any remnants of delay slot */
if (delay_mode(regs)) {
regs->ret = regs->bta & ~1U;
regs->status32 &= ~STATUS_DE_MASK;
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index 9e28058cdba8..200270a94558 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -245,14 +245,9 @@ static void swap_eh_frame_hdr_table_entries(void *p1, void *p2, int size)
{
struct eh_frame_hdr_table_entry *e1 = p1;
struct eh_frame_hdr_table_entry *e2 = p2;
- unsigned long v;
-
- v = e1->start;
- e1->start = e2->start;
- e2->start = v;
- v = e1->fde;
- e1->fde = e2->fde;
- e2->fde = v;
+
+ swap(e1->start, e2->start);
+ swap(e1->fde, e2->fde);
}
static void init_unwind_hdr(struct unwind_table *table,
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