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f05995cc6d
The recent kstack erase changes appear to have uncovered an existing
issue with a missing header inclusion:
In file included from drivers/misc/lkdtm/kstack_erase.c:12:
In file included from include/linux/kstack_erase.h:16:
arch/arm/include/asm/stacktrace.h:48:21: error: call to undeclared function 'in_entry_text'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
48 | frame->ex_frame = in_entry_text(frame->pc);
| ^
Include asm/sections.h here so the compiler can see the in_entry_text()
declaration.
Fixes: 752ec621ef ("ARM: 9234/1: stacktrace: Avoid duplicate saving of exception PC value")
Cc: Kees Cook <kees@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250807071902.4077714-1-arnd@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_STACKTRACE_H
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#define __ASM_STACKTRACE_H
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#include <linux/llist.h>
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#include <asm/ptrace.h>
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#include <asm/sections.h>
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struct stackframe {
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/*
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* FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
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* and R11 otherwise.
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*/
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unsigned long fp;
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unsigned long sp;
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unsigned long lr;
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unsigned long pc;
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/* address of the LR value on the stack */
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unsigned long *lr_addr;
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#ifdef CONFIG_KRETPROBES
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struct llist_node *kr_cur;
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struct task_struct *tsk;
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#endif
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#ifdef CONFIG_UNWINDER_FRAME_POINTER
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bool ex_frame;
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#endif
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};
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static inline bool on_thread_stack(void)
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{
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unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack;
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return delta < THREAD_SIZE;
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}
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static __always_inline
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void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
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{
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frame->fp = frame_pointer(regs);
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frame->sp = regs->ARM_sp;
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frame->lr = regs->ARM_lr;
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frame->pc = regs->ARM_pc;
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#ifdef CONFIG_KRETPROBES
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frame->kr_cur = NULL;
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frame->tsk = current;
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#endif
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#ifdef CONFIG_UNWINDER_FRAME_POINTER
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frame->ex_frame = in_entry_text(frame->pc);
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#endif
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}
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extern int unwind_frame(struct stackframe *frame);
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extern void walk_stackframe(struct stackframe *frame,
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bool (*fn)(void *, unsigned long), void *data);
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extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
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unsigned long top);
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extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
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const char *loglvl);
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#endif /* __ASM_STACKTRACE_H */
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