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LoongArch: ftrace: Abstract DYNAMIC_FTRACE_WITH_ARGS accesses

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Add new ftrace_regs_{get,set}_*() helpers which can be used to manipulate
ftrace_regs. When CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y, these can always
be used on any ftrace_regs, and when CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
=n these can be used when regs are available.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Qing Zhang 2023-05-01 17:19:52 +08:00 committed by Huacai Chen
parent 8b5ee2c66d
commit 6fbff14a63
1 changed files with 25 additions and 0 deletions
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25
arch/loongarch/include/asm/ftrace.h
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@ -54,6 +54,31 @@ static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *
return &fregs->regs;
}
static __always_inline unsigned long
ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs)
{
return instruction_pointer(&fregs->regs);
}
static __always_inline void
ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, unsigned long ip)
{
regs_set_return_value(&fregs->regs, ip);
}
#define ftrace_regs_get_argument(fregs, n) \
regs_get_kernel_argument(&(fregs)->regs, n)
#define ftrace_regs_get_stack_pointer(fregs) \
kernel_stack_pointer(&(fregs)->regs)
#define ftrace_regs_return_value(fregs) \
regs_return_value(&(fregs)->regs)
#define ftrace_regs_set_return_value(fregs, ret) \
regs_set_return_value(&(fregs)->regs, ret)
#define ftrace_override_function_with_return(fregs) \
override_function_with_return(&(fregs)->regs)
#define ftrace_regs_query_register_offset(name) \
regs_query_register_offset(name)
#define ftrace_graph_func ftrace_graph_func
void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct ftrace_regs *fregs);