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-rw-r--r--arch/openrisc/kernel/entry.S6
-rw-r--r--arch/openrisc/kernel/head.S32
-rw-r--r--arch/openrisc/kernel/ptrace.c96
-rw-r--r--arch/openrisc/kernel/signal.c2
-rw-r--r--arch/openrisc/kernel/vmlinux.lds.S3
5 files changed, 122 insertions, 17 deletions
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S
index 440711d7bf40..c7e90b09645e 100644
--- a/arch/openrisc/kernel/entry.S
+++ b/arch/openrisc/kernel/entry.S
@@ -239,6 +239,8 @@ handler: ;\
/* =====================================================[ exceptions] === */
+ __REF
+
/* ---[ 0x100: RESET exception ]----------------------------------------- */
EXCEPTION_ENTRY(_tng_kernel_start)
@@ -712,6 +714,10 @@ _syscall_check_trace_leave:
* interrupts that set NEED_RESCHED or SIGNALPENDING... really true? */
_syscall_check_work:
+#ifdef CONFIG_DEBUG_RSEQ
+ l.jal rseq_syscall
+ l.ori r3,r1,0
+#endif
/* Here we need to disable interrupts */
DISABLE_INTERRUPTS(r27,r29)
TRACE_IRQS_OFF
diff --git a/arch/openrisc/kernel/head.S b/arch/openrisc/kernel/head.S
index 439e00f81e5d..bd760066f1cd 100644
--- a/arch/openrisc/kernel/head.S
+++ b/arch/openrisc/kernel/head.S
@@ -26,15 +26,15 @@
#include <asm/asm-offsets.h>
#include <linux/of_fdt.h>
-#define tophys(rd,rs) \
- l.movhi rd,hi(-KERNELBASE) ;\
+#define tophys(rd,rs) \
+ l.movhi rd,hi(-KERNELBASE) ;\
l.add rd,rd,rs
-#define CLEAR_GPR(gpr) \
+#define CLEAR_GPR(gpr) \
l.movhi gpr,0x0
-#define LOAD_SYMBOL_2_GPR(gpr,symbol) \
- l.movhi gpr,hi(symbol) ;\
+#define LOAD_SYMBOL_2_GPR(gpr,symbol) \
+ l.movhi gpr,hi(symbol) ;\
l.ori gpr,gpr,lo(symbol)
@@ -326,21 +326,21 @@
l.addi r1,r1,-(INT_FRAME_SIZE) ;\
/* r1 is KSP, r30 is __pa(KSP) */ ;\
tophys (r30,r1) ;\
- l.sw PT_GPR12(r30),r12 ;\
+ l.sw PT_GPR12(r30),r12 ;\
l.mfspr r12,r0,SPR_EPCR_BASE ;\
l.sw PT_PC(r30),r12 ;\
l.mfspr r12,r0,SPR_ESR_BASE ;\
l.sw PT_SR(r30),r12 ;\
/* save r31 */ ;\
EXCEPTION_T_LOAD_GPR30(r12) ;\
- l.sw PT_GPR30(r30),r12 ;\
+ l.sw PT_GPR30(r30),r12 ;\
/* save r10 as was prior to exception */ ;\
EXCEPTION_T_LOAD_GPR10(r12) ;\
- l.sw PT_GPR10(r30),r12 ;\
- /* save PT_SP as was prior to exception */ ;\
+ l.sw PT_GPR10(r30),r12 ;\
+ /* save PT_SP as was prior to exception */ ;\
EXCEPTION_T_LOAD_SP(r12) ;\
l.sw PT_SP(r30),r12 ;\
- l.sw PT_GPR13(r30),r13 ;\
+ l.sw PT_GPR13(r30),r13 ;\
/* --> */ ;\
/* save exception r4, set r4 = EA */ ;\
l.sw PT_GPR4(r30),r4 ;\
@@ -357,6 +357,8 @@
/* =====================================================[ exceptions] === */
+ __HEAD
+
/* ---[ 0x100: RESET exception ]----------------------------------------- */
.org 0x100
/* Jump to .init code at _start which lives in the .head section
@@ -394,7 +396,7 @@ _dispatch_do_ipage_fault:
.org 0x500
EXCEPTION_HANDLE(_timer_handler)
-/* ---[ 0x600: Alignment exception ]-------------------------------------- */
+/* ---[ 0x600: Alignment exception ]------------------------------------- */
.org 0x600
EXCEPTION_HANDLE(_alignment_handler)
@@ -424,7 +426,7 @@ _dispatch_do_ipage_fault:
.org 0xc00
EXCEPTION_HANDLE(_sys_call_handler)
-/* ---[ 0xd00: Floating point exception ]--------------------------------- */
+/* ---[ 0xd00: Floating point exception ]-------------------------------- */
.org 0xd00
EXCEPTION_HANDLE(_fpe_trap_handler)
@@ -506,10 +508,10 @@ _dispatch_do_ipage_fault:
/* .text*/
-/* This early stuff belongs in HEAD, but some of the functions below definitely
+/* This early stuff belongs in the .init.text section, but some of the functions below definitely
* don't... */
- __HEAD
+ __INIT
.global _start
_start:
/* Init r0 to zero as per spec */
@@ -816,7 +818,7 @@ secondary_start:
#endif
-/* ========================================[ cache ]=== */
+/* ==========================================================[ cache ]=== */
/* alignment here so we don't change memory offsets with
* memory controller defined
diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c
index 5091b18eab4c..8430570d0620 100644
--- a/arch/openrisc/kernel/ptrace.c
+++ b/arch/openrisc/kernel/ptrace.c
@@ -160,6 +160,102 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
* in exit.c or in signal.c.
*/
+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}
+
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_NAME(sr),
+ REG_OFFSET_NAME(sp),
+ REG_OFFSET_NAME(gpr2),
+ REG_OFFSET_NAME(gpr3),
+ REG_OFFSET_NAME(gpr4),
+ REG_OFFSET_NAME(gpr5),
+ REG_OFFSET_NAME(gpr6),
+ REG_OFFSET_NAME(gpr7),
+ REG_OFFSET_NAME(gpr8),
+ REG_OFFSET_NAME(gpr9),
+ REG_OFFSET_NAME(gpr10),
+ REG_OFFSET_NAME(gpr11),
+ REG_OFFSET_NAME(gpr12),
+ REG_OFFSET_NAME(gpr13),
+ REG_OFFSET_NAME(gpr14),
+ REG_OFFSET_NAME(gpr15),
+ REG_OFFSET_NAME(gpr16),
+ REG_OFFSET_NAME(gpr17),
+ REG_OFFSET_NAME(gpr18),
+ REG_OFFSET_NAME(gpr19),
+ REG_OFFSET_NAME(gpr20),
+ REG_OFFSET_NAME(gpr21),
+ REG_OFFSET_NAME(gpr22),
+ REG_OFFSET_NAME(gpr23),
+ REG_OFFSET_NAME(gpr24),
+ REG_OFFSET_NAME(gpr25),
+ REG_OFFSET_NAME(gpr26),
+ REG_OFFSET_NAME(gpr27),
+ REG_OFFSET_NAME(gpr28),
+ REG_OFFSET_NAME(gpr29),
+ REG_OFFSET_NAME(gpr30),
+ REG_OFFSET_NAME(gpr31),
+ REG_OFFSET_NAME(pc),
+ REG_OFFSET_NAME(orig_gpr11),
+ REG_OFFSET_END,
+};
+
+/**
+ * regs_query_register_offset() - query register offset from its name
+ * @name: the name of a register
+ *
+ * regs_query_register_offset() returns the offset of a register in struct
+ * pt_regs from its name. If the name is invalid, this returns -EINVAL;
+ */
+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;
+}
+
+/**
+ * regs_within_kernel_stack() - check the address in the stack
+ * @regs: pt_regs which contains kernel stack pointer.
+ * @addr: address which is checked.
+ *
+ * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
+ * If @addr is within the kernel stack, it returns true. If not, returns false.
+ */
+static bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr)
+{
+ return (addr & ~(THREAD_SIZE - 1)) ==
+ (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1));
+}
+
+/**
+ * regs_get_kernel_stack_nth() - get Nth entry of the stack
+ * @regs: pt_regs which contains kernel stack pointer.
+ * @n: stack entry number.
+ *
+ * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
+ * is specified by @regs. If the @n th entry is NOT in the kernel stack,
+ * this returns 0.
+ */
+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;
+}
/*
* Called by kernel/ptrace.c when detaching..
diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index c7ab42e2cb7a..f70a13ee0593 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -244,6 +244,8 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
int ret;
+ rseq_signal_deliver(ksig, regs);
+
ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
diff --git a/arch/openrisc/kernel/vmlinux.lds.S b/arch/openrisc/kernel/vmlinux.lds.S
index bc1306047837..049bff45f612 100644
--- a/arch/openrisc/kernel/vmlinux.lds.S
+++ b/arch/openrisc/kernel/vmlinux.lds.S
@@ -50,6 +50,7 @@ SECTIONS
.text : AT(ADDR(.text) - LOAD_OFFSET)
{
_stext = .;
+ HEAD_TEXT
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
@@ -83,8 +84,6 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__init_begin = .;
- HEAD_TEXT_SECTION
-
/* Page aligned */
INIT_TEXT_SECTION(PAGE_SIZE)
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-08-21 18:23:43 +0000