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/linux/drivers/misc/altera-stapl/
H A Daltera.c213 long *stack = astate->stack; in altera_execute() local
528 stack[stack_ptr] = stack[stack_ptr - 1]; in altera_execute()
534 swap(stack[stack_ptr - 2], stack[stack_ptr - 1]); in altera_execute()
539 stack[stack_ptr - 1] += stack[stack_ptr]; in altera_execute()
545 stack[stack_ptr - 1] -= stack[stack_ptr]; in altera_execute()
551 stack[stack_ptr - 1] *= stack[stack_ptr]; in altera_execute()
557 stack[stack_ptr - 1] /= stack[stack_ptr]; in altera_execute()
563 stack[stack_ptr - 1] %= stack[stack_ptr]; in altera_execute()
569 stack[stack_ptr - 1] <<= stack[stack_ptr]; in altera_execute()
575 stack[stack_ptr - 1] >>= stack[stack_ptr]; in altera_execute()
[all …]
/linux/lib/
H A Dstackdepot.c364 struct stack_record *stack; in depot_pop_free_pool() local
382 stack = current_pool + pool_offset; in depot_pop_free_pool()
385 stack->handle.pool_index_plus_1 = pool_index + 1; in depot_pop_free_pool()
386 stack->handle.offset = pool_offset >> DEPOT_STACK_ALIGN; in depot_pop_free_pool()
387 stack->handle.extra = 0; in depot_pop_free_pool()
388 INIT_LIST_HEAD(&stack->hash_list); in depot_pop_free_pool()
392 return stack; in depot_pop_free_pool()
399 struct stack_record *stack; in depot_pop_free() local
412 stack = list_first_entry(&free_stacks, struct stack_record, free_list); in depot_pop_free()
413 if (!poll_state_synchronize_rcu(stack->rcu_state)) in depot_pop_free()
[all …]
/linux/tools/testing/selftests/bpf/progs/
H A Dtest_global_func_ctx_args.c11 static long stack[256]; variable
19 return bpf_get_stack(ctx, &stack, sizeof(stack), 0); in kprobe_typedef_ctx_subprog()
50 return bpf_get_stack((void *)ctx, &stack, sizeof(stack), 0); in kprobe_struct_ctx_subprog()
67 return bpf_get_stack(ctx, &stack, sizeof(stack), 0); in kprobe_workaround_ctx_subprog()
83 return bpf_get_stack(ctx, &stack, sizeof(stack), 0); in raw_tp_ctx_subprog()
99 return bpf_get_stack(ctx, &stack, sizeof(stack), 0); in raw_tp_writable_ctx_subprog()
115 return bpf_get_stack(ctx, &stack, sizeof(stack), 0); in perf_event_ctx_subprog()
130 return bpf_get_stack(ctx, stack, sizeof(stack), 0); in subprog_ctx_tag()
142 return bpf_get_stack(ctx1, stack, sizeof(stack), 0) + in subprog_multi_ctx_tags()
144 bpf_get_stack(ctx2, stack, sizeof(stack), 0); in subprog_multi_ctx_tags()
/linux/arch/x86/kernel/
H A Ddumpstack_32.c38 static bool in_hardirq_stack(unsigned long *stack, struct stack_info *info) in in_hardirq_stack() argument
47 if (stack < begin || stack > end) in in_hardirq_stack()
63 static bool in_softirq_stack(unsigned long *stack, struct stack_info *info) in in_softirq_stack() argument
72 if (stack < begin || stack > end) in in_softirq_stack()
88 static bool in_doublefault_stack(unsigned long *stack, struct stack_info *info) in in_doublefault_stack() argument
93 void *begin = ss->stack; in in_doublefault_stack()
94 void *end = begin + sizeof(ss->stack); in in_doublefault_stack()
96 if ((void *)stack < begin || (void *)stack >= end) in in_doublefault_stack()
108 int get_stack_info(unsigned long *stack, struct task_struct *task, in get_stack_info() argument
111 if (!stack) in get_stack_info()
[all …]
H A Ddumpstack.c30 bool noinstr in_task_stack(unsigned long *stack, struct task_struct *task, in in_task_stack() argument
36 if (stack < begin || stack >= end) in in_task_stack()
48 bool noinstr in_entry_stack(unsigned long *stack, struct stack_info *info) in in_entry_stack() argument
55 if ((void *)stack < begin || (void *)stack >= end) in in_entry_stack()
185 unsigned long *stack, const char *log_lvl) in __show_trace_log_lvl() argument
195 unwind_start(&state, task, regs, stack); in __show_trace_log_lvl()
196 stack = stack ?: get_stack_pointer(task, regs); in __show_trace_log_lvl()
215 for (; stack; stack = stack_info.next_sp) { in __show_trace_log_lvl()
218 stack = PTR_ALIGN(stack, sizeof(long)); in __show_trace_log_lvl()
220 if (get_stack_info(stack, task, &stack_info, &visit_mask)) { in __show_trace_log_lvl()
[all …]
H A Ddumpstack_64.c94 static __always_inline bool in_exception_stack(unsigned long *stack, struct stack_info *info) in in_exception_stack() argument
96 unsigned long begin, end, stk = (unsigned long)stack; in in_exception_stack()
135 static __always_inline bool in_irq_stack(unsigned long *stack, struct stack_info *info) in in_irq_stack() argument
153 if (stack < begin || stack >= end) in in_irq_stack()
170 bool noinstr get_stack_info_noinstr(unsigned long *stack, struct task_struct *task, in get_stack_info_noinstr() argument
173 if (in_task_stack(stack, task, info)) in get_stack_info_noinstr()
179 if (in_exception_stack(stack, info)) in get_stack_info_noinstr()
182 if (in_irq_stack(stack, info)) in get_stack_info_noinstr()
185 if (in_entry_stack(stack, info)) in get_stack_info_noinstr()
191 int get_stack_info(unsigned long *stack, struct task_struct *task, in get_stack_info() argument
[all …]
/linux/Documentation/arch/riscv/
H A Dzicfiss.rst7 Shadow stack to protect function returns on RISC-V Linux
22 stack. chaining them together to perform return oriented programming
26 Return addresses live on the stack in read-write memory. Therefore
29 provides an alternate stack (the "shadow stack") on which return
34 - PTE encodings for shadow stack virtual memory
36 PTE.R=0, PTE.W=1, PTE.X=0 becomes the PTE encoding for shadow stack pages.
38 - The ``sspush x1/x5`` instruction pushes (stores) ``x1/x5`` to shadow stack.
40 - The ``sspopchk x1/x5`` instruction pops (loads) from shadow stack and compares
45 x1/x5`` to save the return address on shadow stack in addition to the
46 regular stack. Similarly, function epilogues have ``ld x5,
[all …]
/linux/tools/testing/selftests/bpf/prog_tests/
H A Dbuild_id.c10 static void print_stack(struct bpf_stack_build_id *stack, int frame_cnt) in print_stack() argument
16 switch (stack[i].status) { in print_stack()
23 printf("%02hhx", (unsigned)stack[i].build_id[j]); in print_stack()
24 printf(" OFFSET = %llx", (unsigned long long)stack[i].offset); in print_stack()
27 printf("IP = %llx", (unsigned long long)stack[i].ip); in print_stack()
30 printf("UNEXPECTED STATUS %d ", stack[i].status); in print_stack()
40 struct bpf_stack_build_id *stack; in subtest_nofault() local
59 stack = skel->bss->stack_nofault; in subtest_nofault()
62 print_stack(stack, frame_cnt); in subtest_nofault()
65 ASSERT_EQ(stack[0].status, BPF_STACK_BUILD_ID_VALID, "build_id_status"); in subtest_nofault()
[all …]
/linux/Documentation/arch/x86/
H A Dshstk.rst14 CET introduces shadow stack and indirect branch tracking (IBT). A shadow stack
15 is a secondary stack allocated from memory which cannot be directly modified by
17 return address to both the normal stack and the shadow stack. Upon
18 function return, the processor pops the shadow stack copy and compares it
19 to the normal stack copy. If the two differ, the processor raises a
23 shadow stack and kernel IBT are supported.
28 To use userspace shadow stack you need HW that supports it, a kernel
34 To build a user shadow stack enabled kernel, Binutils v2.29 or LLVM v6 or later
38 CET. "user_shstk" means that userspace shadow stack is supported on the current
98 ARCH_SHSTK_SHSTK - Shadow stack
[all …]
H A Dkernel-stacks.rst14 Like all other architectures, x86_64 has a kernel stack for every
17 zombie. While the thread is in user space the kernel stack is empty
25 * Interrupt stack. IRQ_STACK_SIZE
29 kernel switches from the current task to the interrupt stack. Like
32 of every per thread stack.
34 The interrupt stack is also used when processing a softirq.
36 Switching to the kernel interrupt stack is done by software based on a
41 to automatically switch to a new stack for designated events such as
46 point to dedicated stacks; each stack can be a different size.
50 loads such a descriptor, the hardware automatically sets the new stack
[all …]
/linux/tools/testing/selftests/arm64/gcs/
H A Dlibc-gcs.c303 unsigned long *stack; in FIXTURE() local
434 self->stack = (void *)syscall(__NR_map_shadow_stack, 0, in FIXTURE_SETUP()
437 ASSERT_FALSE(self->stack == MAP_FAILED); in FIXTURE_SETUP()
438 ksft_print_msg("Allocated stack from %p-%p\n", self->stack, in FIXTURE_SETUP()
439 self->stack + variant->stack_size); in FIXTURE_SETUP()
446 if (self->stack != MAP_FAILED) { in FIXTURE_TEARDOWN()
447 ret = munmap(self->stack, variant->stack_size); in FIXTURE_TEARDOWN()
455 unsigned long *stack = self->stack; in TEST_F() local
473 ASSERT_EQ(stack[cap_index], GCS_CAP(&stack[cap_index])); in TEST_F()
479 unsigned long *stack = self->stack; in TEST_F() local
[all …]
/linux/arch/s390/kernel/
H A Ddumpstack.c45 enum stack_type type, unsigned long stack) in in_stack() argument
47 if (sp < stack || sp >= stack + THREAD_SIZE) in in_stack()
50 info->begin = stack; in in_stack()
51 info->end = stack + THREAD_SIZE; in in_stack()
58 unsigned long stack = (unsigned long)task_stack_page(task); in in_task_stack() local
60 return in_stack(sp, info, STACK_TYPE_TASK, stack); in in_task_stack()
65 unsigned long stack = get_lowcore()->async_stack - STACK_INIT_OFFSET; in in_irq_stack() local
67 return in_stack(sp, info, STACK_TYPE_IRQ, stack); in in_irq_stack()
72 unsigned long stack = get_lowcore()->nodat_stack - STACK_INIT_OFFSET; in in_nodat_stack() local
74 return in_stack(sp, info, STACK_TYPE_NODAT, stack); in in_nodat_stack()
[all …]
/linux/Documentation/mm/
H A Dvmalloced-kernel-stacks.rst21 Kernel stack overflows are often hard to debug and make the kernel
25 Virtually mapped kernel stacks with guard pages cause kernel stack
31 causes reliable faults when the stack overflows. The usability of
32 the stack trace after overflow and response to the overflow itself
49 needs to work while the stack points to a virtual address with
51 most likely) needs to ensure that the stack's page table entries
52 are populated before running on a possibly unpopulated stack.
53 - If the stack overflows into a guard page, something reasonable
64 with guard pages. This causes kernel stack overflows to be caught
75 VMAP_STACK is enabled, it is not possible to run DMA on stack
[all …]
/linux/mm/
H A Dpage_owner.c39 struct stack { struct
41 struct stack *next; argument
43 static struct stack dummy_stack;
44 static struct stack failure_stack;
45 static struct stack *stack_list;
53 struct stack *stack; member
178 struct stack *stack; in add_stack_record_to_list() local
184 stack = kmalloc_obj(*stack, gfp_nested_mask(gfp_mask)); in add_stack_record_to_list()
185 if (!stack) { in add_stack_record_to_list()
191 stack->stack_record = stack_record; in add_stack_record_to_list()
[all …]
/linux/arch/nios2/kernel/
H A Dtraps.c60 void show_stack(struct task_struct *task, unsigned long *stack, in show_stack() argument
66 if (!stack) { in show_stack()
68 stack = (unsigned long *)task->thread.ksp; in show_stack()
70 stack = (unsigned long *)&stack; in show_stack()
73 addr = (unsigned long) stack; in show_stack()
76 printk("%sStack from %08lx:", loglvl, (unsigned long)stack); in show_stack()
78 if (stack + 1 > endstack) in show_stack()
82 printk("%s %08lx", loglvl, *stack++); in show_stack()
87 while (stack + 1 <= endstack) { in show_stack()
88 addr = *stack++; in show_stack()
/linux/mm/kmsan/
H A Dinit.c149 static void smallstack_push(struct smallstack *stack, struct page *pages) in smallstack_push() argument
151 KMSAN_WARN_ON(stack->index == MAX_BLOCKS); in smallstack_push()
152 stack->items[stack->index] = pages; in smallstack_push()
153 stack->index++; in smallstack_push()
157 static struct page *smallstack_pop(struct smallstack *stack) in smallstack_pop() argument
161 KMSAN_WARN_ON(stack->index == 0); in smallstack_pop()
162 stack->index--; in smallstack_pop()
163 ret = stack->items[stack->index]; in smallstack_pop()
164 stack->items[stack->index] = NULL; in smallstack_pop()
/linux/arch/openrisc/kernel/
H A Dunwinder.c60 void unwind_stack(void *data, unsigned long *stack, in unwind_stack() argument
67 while (!kstack_end(stack)) { in unwind_stack()
68 frameinfo = container_of(stack, in unwind_stack()
83 stack++; in unwind_stack()
93 void unwind_stack(void *data, unsigned long *stack, in unwind_stack() argument
98 while (!kstack_end(stack)) { in unwind_stack()
99 addr = *stack++; in unwind_stack()
/linux/tools/testing/selftests/mm/
H A Dpkey_sighandler_tests.c80 static inline long clone_raw(unsigned long flags, void *stack, in clone_raw() argument
84 long a2 = (long)stack; in clone_raw()
179 stack_t *stack = ptr; in thread_segv_maperr_ptr() local
187 syscall_raw(SYS_sigaltstack, (long)stack, 0, 0, 0, 0, 0); in thread_segv_maperr_ptr()
286 void *stack; in test_sigsegv_handler_with_different_pkey_for_stack() local
302 stack = mmap(0, STACK_SIZE, PROT_READ | PROT_WRITE, in test_sigsegv_handler_with_different_pkey_for_stack()
305 assert(stack != MAP_FAILED); in test_sigsegv_handler_with_different_pkey_for_stack()
315 sys_mprotect_pkey(stack, STACK_SIZE, PROT_READ | PROT_WRITE, pkey); in test_sigsegv_handler_with_different_pkey_for_stack()
330 stack + STACK_SIZE, in test_sigsegv_handler_with_different_pkey_for_stack()
405 stack_t *stack = ptr; in thread_sigusr2_self() local
[all …]
/linux/scripts/kconfig/
H A Dsymbol.c1089 static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym) in dep_stack_insert() argument
1091 memset(stack, 0, sizeof(*stack)); in dep_stack_insert()
1093 check_top->next = stack; in dep_stack_insert()
1094 stack->prev = check_top; in dep_stack_insert()
1095 stack->sym = sym; in dep_stack_insert()
1096 check_top = stack; in dep_stack_insert()
1113 struct dep_stack *stack; in sym_check_print_recursive() local
1125 for (stack = check_top; stack != NULL; stack = stack->prev) in sym_check_print_recursive()
1126 if (stack->sym == last_sym) in sym_check_print_recursive()
1128 if (!stack) { in sym_check_print_recursive()
[all …]
/linux/include/linux/sched/
H A Dtask_stack.h23 return task->stack; in task_stack_page()
31 return (unsigned long *)((unsigned long)task->stack + THREAD_SIZE) - 1; in end_of_stack()
33 return task->stack; in end_of_stack()
39 #define task_stack_page(task) ((void *)(task)->stack)
91 void *stack = task_stack_page(current); in object_is_on_stack() local
94 return (obj >= stack) && (obj < (stack + THREAD_SIZE)); in object_is_on_stack()
/linux/tools/perf/scripts/python/
H A Dstackcollapse.py97 stack = list()
103 stack.append(tidy_function_name(entry['sym']['name'],
108 stack.append(tidy_function_name(param_dict['symbol'],
119 stack.append(comm)
121 stack_string = ';'.join(reversed(stack))
126 for stack in list:
127 print("%s %d" % (stack, lines[stack]))
/linux/arch/um/kernel/
H A Dsysrq.c29 void show_stack(struct task_struct *task, unsigned long *stack, in show_stack() argument
35 if (!stack) in show_stack()
36 stack = get_stack_pointer(task, segv_regs); in show_stack()
40 if (kstack_end(stack)) in show_stack()
44 pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack)); in show_stack()
45 stack++; in show_stack()
/linux/arch/um/os-Linux/
H A Dhelper.c47 unsigned long stack, sp; in run_helper() local
50 stack = alloc_stack(0, __uml_cant_sleep()); in run_helper()
51 if (stack == 0) in run_helper()
69 sp = stack + UM_KERN_PAGE_SIZE; in run_helper()
115 free_stack(stack, 0); in run_helper()
122 unsigned long stack, sp; in run_helper_thread() local
129 stack = alloc_stack(0, __uml_cant_sleep()); in run_helper_thread()
130 if (stack == 0) in run_helper_thread()
133 sp = stack + UM_KERN_PAGE_SIZE; in run_helper_thread()
152 free_stack(stack, 0); in run_helper_thread()
[all …]
/linux/arch/x86/include/asm/
H A Dstacktrace.h31 bool in_task_stack(unsigned long *stack, struct task_struct *task,
34 bool in_entry_stack(unsigned long *stack, struct stack_info *info);
36 int get_stack_info(unsigned long *stack, struct task_struct *task,
38 bool get_stack_info_noinstr(unsigned long *stack, struct task_struct *task,
42 bool get_stack_guard_info(unsigned long *stack, struct stack_info *info) in get_stack_guard_info() argument
45 if (get_stack_info_noinstr(stack, current, info)) in get_stack_guard_info()
48 return get_stack_info_noinstr((void *)stack + PAGE_SIZE, current, info); in get_stack_guard_info()
/linux/arch/powerpc/kernel/
H A Dstacktrace.c44 unsigned long *stack = (unsigned long *) sp; in arch_stack_walk() local
50 newsp = stack[0]; in arch_stack_walk()
51 ip = stack[STACK_FRAME_LR_SAVE]; in arch_stack_walk()
96 unsigned long *stack = (unsigned long *) sp; in arch_stack_walk_reliable() local
103 newsp = stack[0]; in arch_stack_walk_reliable()
123 stack[STACK_INT_FRAME_MARKER_LONGS] == STACK_FRAME_REGS_MARKER) { in arch_stack_walk_reliable()
128 ip = stack[STACK_FRAME_LR_SAVE]; in arch_stack_walk_reliable()
136 ip = ftrace_graph_ret_addr(task, &graph_idx, ip, stack); in arch_stack_walk_reliable()

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