github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 15:12:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: debug: remove break/step handler registration infrastructure

Browse Source 
Remove all infrastructure for the dynamic registration previously used by
software breakpoints and stepping handlers.

Signed-off-by: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Tested-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20250707114109.35672-6-ada.coupriediaz@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ada Couprie Diaz 2025-07-07 12:41:01 +01:00 committed by Will Deacon
parent 403b48aad5
commit d4e0b12620
2 changed files with 0 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
arch/arm64/include/asm/debug-monitors.h
View File

@ -62,30 +62,6 @@ struct task_struct;
#define DBG_HOOK_HANDLED 0
#define DBG_HOOK_ERROR 1
struct step_hook {
struct list_head node;
int (*fn)(struct pt_regs *regs, unsigned long esr);
};
void register_user_step_hook(struct step_hook *hook);
void unregister_user_step_hook(struct step_hook *hook);
void register_kernel_step_hook(struct step_hook *hook);
void unregister_kernel_step_hook(struct step_hook *hook);
struct break_hook {
struct list_head node;
int (*fn)(struct pt_regs *regs, unsigned long esr);
u16 imm;
u16 mask; /* These bits are ignored when comparing with imm */
};
void register_user_break_hook(struct break_hook *hook);
void unregister_user_break_hook(struct break_hook *hook);
void register_kernel_break_hook(struct break_hook *hook);
void unregister_kernel_break_hook(struct break_hook *hook);
u8 debug_monitors_arch(void);
enum dbg_active_el {

63
arch/arm64/kernel/debug-monitors.c
View File

@ -159,46 +159,6 @@ NOKPROBE_SYMBOL(clear_user_regs_spsr_ss);
#define set_regs_spsr_ss(r) set_user_regs_spsr_ss(&(r)->user_regs)
#define clear_regs_spsr_ss(r) clear_user_regs_spsr_ss(&(r)->user_regs)
static DEFINE_SPINLOCK(debug_hook_lock);
static LIST_HEAD(user_step_hook);
static LIST_HEAD(kernel_step_hook);
static void register_debug_hook(struct list_head *node, struct list_head *list)
{
spin_lock(&debug_hook_lock);
list_add_rcu(node, list);
spin_unlock(&debug_hook_lock);
}
static void unregister_debug_hook(struct list_head *node)
{
spin_lock(&debug_hook_lock);
list_del_rcu(node);
spin_unlock(&debug_hook_lock);
synchronize_rcu();
}
void register_user_step_hook(struct step_hook *hook)
{
register_debug_hook(&hook->node, &user_step_hook);
}
void unregister_user_step_hook(struct step_hook *hook)
{
unregister_debug_hook(&hook->node);
}
void register_kernel_step_hook(struct step_hook *hook)
{
register_debug_hook(&hook->node, &kernel_step_hook);
}
void unregister_kernel_step_hook(struct step_hook *hook)
{
unregister_debug_hook(&hook->node);
}
/*
* Call single step handlers
* There is no Syndrome info to check for determining the handler.
@ -264,29 +224,6 @@ static int single_step_handler(unsigned long unused, unsigned long esr,
}
NOKPROBE_SYMBOL(single_step_handler);
static LIST_HEAD(user_break_hook);
static LIST_HEAD(kernel_break_hook);
void register_user_break_hook(struct break_hook *hook)
{
register_debug_hook(&hook->node, &user_break_hook);
}
void unregister_user_break_hook(struct break_hook *hook)
{
unregister_debug_hook(&hook->node);
}
void register_kernel_break_hook(struct break_hook *hook)
{
register_debug_hook(&hook->node, &kernel_break_hook);
}
void unregister_kernel_break_hook(struct break_hook *hook)
{
unregister_debug_hook(&hook->node);
}
static int call_break_hook(struct pt_regs *regs, unsigned long esr)
{
if (user_mode(regs)) {