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x86/ptrace: Always inline trivial accessors 

A KASAN build bloats these single load/store helpers such that
it fails to inline them:

  vmlinux.o: error: objtool: irqentry_exit+0x5e8: call to instruction_pointer_set() with UACCESS enabled

Make sure the compiler isn't allowed to do stupid.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/20251031105435.GU4068168@noisy.programming.kicks-ass.net
This commit is contained in:
Peter Zijlstra 2025-10-31 12:04:24 +01:00 committed by Ingo Molnar
parent 323d93f043
commit 1fe4002cf7
1 changed files with 10 additions and 10 deletions
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20
arch/x86/include/asm/ptrace.h
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@ -187,12 +187,12 @@ convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
extern void send_sigtrap(struct pt_regs *regs, int error_code, int si_code);
static inline unsigned long regs_return_value(struct pt_regs *regs)
static __always_inline unsigned long regs_return_value(struct pt_regs *regs)
{
return regs->ax;
}
static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
static __always_inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
{
regs->ax = rc;
}
@ -277,34 +277,34 @@ static __always_inline bool ip_within_syscall_gap(struct pt_regs *regs)
}
#endif
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
static __always_inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
return regs->sp;
}
static inline unsigned long instruction_pointer(struct pt_regs *regs)
static __always_inline unsigned long instruction_pointer(struct pt_regs *regs)
{
return regs->ip;
}
static inline void instruction_pointer_set(struct pt_regs *regs,
unsigned long val)
static __always_inline
void instruction_pointer_set(struct pt_regs *regs, unsigned long val)
{
regs->ip = val;
}
static inline unsigned long frame_pointer(struct pt_regs *regs)
static __always_inline unsigned long frame_pointer(struct pt_regs *regs)
{
return regs->bp;
}
static inline unsigned long user_stack_pointer(struct pt_regs *regs)
static __always_inline unsigned long user_stack_pointer(struct pt_regs *regs)
{
return regs->sp;
}
static inline void user_stack_pointer_set(struct pt_regs *regs,
unsigned long val)
static __always_inline
void user_stack_pointer_set(struct pt_regs *regs, unsigned long val)
{
regs->sp = val;
}