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-rw-r--r--include/asm-generic/vmlinux.lds.h22
-rw-r--r--include/asm-i386/unwind.h91
-rw-r--r--include/asm-x86_64/unwind.h96
-rw-r--r--include/linux/unwind.h63
4 files changed, 2 insertions, 270 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 7437ccaada77..1587121730c5 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -119,8 +119,6 @@
*(__ksymtab_strings) \
} \
\
- EH_FRAME \
- \
/* Built-in module parameters. */ \
__param : AT(ADDR(__param) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start___param) = .; \
@@ -160,26 +158,6 @@
*(.kprobes.text) \
VMLINUX_SYMBOL(__kprobes_text_end) = .;
-#ifdef CONFIG_STACK_UNWIND
-#define EH_FRAME \
- /* Unwind data binary search table */ \
- . = ALIGN(8); \
- .eh_frame_hdr : AT(ADDR(.eh_frame_hdr) - LOAD_OFFSET) { \
- VMLINUX_SYMBOL(__start_unwind_hdr) = .; \
- *(.eh_frame_hdr) \
- VMLINUX_SYMBOL(__end_unwind_hdr) = .; \
- } \
- /* Unwind data */ \
- . = ALIGN(8); \
- .eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) { \
- VMLINUX_SYMBOL(__start_unwind) = .; \
- *(.eh_frame) \
- VMLINUX_SYMBOL(__end_unwind) = .; \
- }
-#else
-#define EH_FRAME
-#endif
-
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to
the beginning of the section so we begin them at 0. */
diff --git a/include/asm-i386/unwind.h b/include/asm-i386/unwind.h
index aa2c931e30db..43c70c3de2f9 100644
--- a/include/asm-i386/unwind.h
+++ b/include/asm-i386/unwind.h
@@ -1,95 +1,6 @@
#ifndef _ASM_I386_UNWIND_H
#define _ASM_I386_UNWIND_H
-/*
- * Copyright (C) 2002-2006 Novell, Inc.
- * Jan Beulich <jbeulich@novell.com>
- * This code is released under version 2 of the GNU GPL.
- */
-
-#ifdef CONFIG_STACK_UNWIND
-
-#include <linux/sched.h>
-#include <asm/fixmap.h>
-#include <asm/ptrace.h>
-#include <asm/uaccess.h>
-
-struct unwind_frame_info
-{
- struct pt_regs regs;
- struct task_struct *task;
- unsigned call_frame:1;
-};
-
-#define UNW_PC(frame) (frame)->regs.eip
-#define UNW_SP(frame) (frame)->regs.esp
-#ifdef CONFIG_FRAME_POINTER
-#define UNW_FP(frame) (frame)->regs.ebp
-#define FRAME_RETADDR_OFFSET 4
-#define FRAME_LINK_OFFSET 0
-#define STACK_BOTTOM(tsk) STACK_LIMIT((tsk)->thread.esp0)
-#define STACK_TOP(tsk) ((tsk)->thread.esp0)
-#else
-#define UNW_FP(frame) ((void)(frame), 0)
-#endif
-#define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
-
-#define UNW_REGISTER_INFO \
- PTREGS_INFO(eax), \
- PTREGS_INFO(ecx), \
- PTREGS_INFO(edx), \
- PTREGS_INFO(ebx), \
- PTREGS_INFO(esp), \
- PTREGS_INFO(ebp), \
- PTREGS_INFO(esi), \
- PTREGS_INFO(edi), \
- PTREGS_INFO(eip)
-
-#define UNW_DEFAULT_RA(raItem, dataAlign) \
- ((raItem).where == Memory && \
- !((raItem).value * (dataAlign) + 4))
-
-static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
- /*const*/ struct pt_regs *regs)
-{
- if (user_mode_vm(regs))
- info->regs = *regs;
- else {
- memcpy(&info->regs, regs, offsetof(struct pt_regs, esp));
- info->regs.esp = (unsigned long)&regs->esp;
- info->regs.xss = __KERNEL_DS;
- }
-}
-
-static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
-{
- memset(&info->regs, 0, sizeof(info->regs));
- info->regs.eip = info->task->thread.eip;
- info->regs.xcs = __KERNEL_CS;
- __get_user(info->regs.ebp, (long *)info->task->thread.esp);
- info->regs.esp = info->task->thread.esp;
- info->regs.xss = __KERNEL_DS;
- info->regs.xds = __USER_DS;
- info->regs.xes = __USER_DS;
- info->regs.xgs = __KERNEL_PDA;
-}
-
-extern asmlinkage int arch_unwind_init_running(struct unwind_frame_info *,
- asmlinkage int (*callback)(struct unwind_frame_info *,
- void *arg),
- void *arg);
-
-static inline int arch_unw_user_mode(/*const*/ struct unwind_frame_info *info)
-{
- return user_mode_vm(&info->regs)
- || info->regs.eip < PAGE_OFFSET
- || (info->regs.eip >= __fix_to_virt(FIX_VDSO)
- && info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE)
- || info->regs.esp < PAGE_OFFSET;
-}
-
-#else
-
#define UNW_PC(frame) ((void)(frame), 0)
#define UNW_SP(frame) ((void)(frame), 0)
#define UNW_FP(frame) ((void)(frame), 0)
@@ -99,6 +10,4 @@ static inline int arch_unw_user_mode(const void *info)
return 0;
}
-#endif
-
#endif /* _ASM_I386_UNWIND_H */
diff --git a/include/asm-x86_64/unwind.h b/include/asm-x86_64/unwind.h
index 2f6349e48717..02710f6a4560 100644
--- a/include/asm-x86_64/unwind.h
+++ b/include/asm-x86_64/unwind.h
@@ -1,100 +1,6 @@
#ifndef _ASM_X86_64_UNWIND_H
#define _ASM_X86_64_UNWIND_H
-/*
- * Copyright (C) 2002-2006 Novell, Inc.
- * Jan Beulich <jbeulich@novell.com>
- * This code is released under version 2 of the GNU GPL.
- */
-
-#ifdef CONFIG_STACK_UNWIND
-
-#include <linux/sched.h>
-#include <asm/ptrace.h>
-#include <asm/uaccess.h>
-#include <asm/vsyscall.h>
-
-struct unwind_frame_info
-{
- struct pt_regs regs;
- struct task_struct *task;
- unsigned call_frame:1;
-};
-
-#define UNW_PC(frame) (frame)->regs.rip
-#define UNW_SP(frame) (frame)->regs.rsp
-#ifdef CONFIG_FRAME_POINTER
-#define UNW_FP(frame) (frame)->regs.rbp
-#define FRAME_RETADDR_OFFSET 8
-#define FRAME_LINK_OFFSET 0
-#define STACK_BOTTOM(tsk) (((tsk)->thread.rsp0 - 1) & ~(THREAD_SIZE - 1))
-#define STACK_TOP(tsk) ((tsk)->thread.rsp0)
-#endif
-/* Might need to account for the special exception and interrupt handling
- stacks here, since normally
- EXCEPTION_STACK_ORDER < THREAD_ORDER < IRQSTACK_ORDER,
- but the construct is needed only for getting across the stack switch to
- the interrupt stack - thus considering the IRQ stack itself is unnecessary,
- and the overhead of comparing against all exception handling stacks seems
- not desirable. */
-#define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
-
-#define UNW_REGISTER_INFO \
- PTREGS_INFO(rax), \
- PTREGS_INFO(rdx), \
- PTREGS_INFO(rcx), \
- PTREGS_INFO(rbx), \
- PTREGS_INFO(rsi), \
- PTREGS_INFO(rdi), \
- PTREGS_INFO(rbp), \
- PTREGS_INFO(rsp), \
- PTREGS_INFO(r8), \
- PTREGS_INFO(r9), \
- PTREGS_INFO(r10), \
- PTREGS_INFO(r11), \
- PTREGS_INFO(r12), \
- PTREGS_INFO(r13), \
- PTREGS_INFO(r14), \
- PTREGS_INFO(r15), \
- PTREGS_INFO(rip)
-
-#define UNW_DEFAULT_RA(raItem, dataAlign) \
- ((raItem).where == Memory && \
- !((raItem).value * (dataAlign) + 8))
-
-static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
- /*const*/ struct pt_regs *regs)
-{
- info->regs = *regs;
-}
-
-static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
-{
- extern const char thread_return[];
-
- memset(&info->regs, 0, sizeof(info->regs));
- info->regs.rip = (unsigned long)thread_return;
- info->regs.cs = __KERNEL_CS;
- __get_user(info->regs.rbp, (unsigned long *)info->task->thread.rsp);
- info->regs.rsp = info->task->thread.rsp;
- info->regs.ss = __KERNEL_DS;
-}
-
-extern int arch_unwind_init_running(struct unwind_frame_info *,
- int (*callback)(struct unwind_frame_info *,
- void *arg),
- void *arg);
-
-static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
-{
- return user_mode(&info->regs)
- || (long)info->regs.rip >= 0
- || (info->regs.rip >= VSYSCALL_START && info->regs.rip < VSYSCALL_END)
- || (long)info->regs.rsp >= 0;
-}
-
-#else
-
#define UNW_PC(frame) ((void)(frame), 0UL)
#define UNW_SP(frame) ((void)(frame), 0UL)
@@ -103,6 +9,4 @@ static inline int arch_unw_user_mode(const void *info)
return 0;
}
-#endif
-
#endif /* _ASM_X86_64_UNWIND_H */
diff --git a/include/linux/unwind.h b/include/linux/unwind.h
index 749928c161fb..7760860fa170 100644
--- a/include/linux/unwind.h
+++ b/include/linux/unwind.h
@@ -14,63 +14,6 @@
struct module;
-#ifdef CONFIG_STACK_UNWIND
-
-#include <asm/unwind.h>
-
-#ifndef ARCH_UNWIND_SECTION_NAME
-#define ARCH_UNWIND_SECTION_NAME ".eh_frame"
-#endif
-
-/*
- * Initialize unwind support.
- */
-extern void unwind_init(void);
-extern void unwind_setup(void);
-
-#ifdef CONFIG_MODULES
-
-extern void *unwind_add_table(struct module *,
- const void *table_start,
- unsigned long table_size);
-
-extern void unwind_remove_table(void *handle, int init_only);
-
-#endif
-
-extern int unwind_init_frame_info(struct unwind_frame_info *,
- struct task_struct *,
- /*const*/ struct pt_regs *);
-
-/*
- * Prepare to unwind a blocked task.
- */
-extern int unwind_init_blocked(struct unwind_frame_info *,
- struct task_struct *);
-
-/*
- * Prepare to unwind the currently running thread.
- */
-extern int unwind_init_running(struct unwind_frame_info *,
- asmlinkage int (*callback)(struct unwind_frame_info *,
- void *arg),
- void *arg);
-
-/*
- * Unwind to previous to frame. Returns 0 if successful, negative
- * number in case of an error.
- */
-extern int unwind(struct unwind_frame_info *);
-
-/*
- * Unwind until the return pointer is in user-land (or until an error
- * occurs). Returns 0 if successful, negative number in case of
- * error.
- */
-extern int unwind_to_user(struct unwind_frame_info *);
-
-#else
-
struct unwind_frame_info {};
static inline void unwind_init(void) {}
@@ -85,12 +28,12 @@ static inline void *unwind_add_table(struct module *mod,
return NULL;
}
-#endif
-
static inline void unwind_remove_table(void *handle, int init_only)
{
}
+#endif
+
static inline int unwind_init_frame_info(struct unwind_frame_info *info,
struct task_struct *tsk,
const struct pt_regs *regs)
@@ -122,6 +65,4 @@ static inline int unwind_to_user(struct unwind_frame_info *info)
return -ENOSYS;
}
-#endif
-
#endif /* _LINUX_UNWIND_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.