#ifndef UAPI_COMPEL_ASM_SIGFRAME_H__
#define UAPI_COMPEL_ASM_SIGFRAME_H__

#include <asm/ptrace.h>
#include <asm/elf.h>
#include <asm/types.h>

/*
 * sigcontext structure defined in file
 *	/usr/include/powerpc64le-linux-gnu/bits/sigcontext.h,
 * included from /usr/include/signal.h
 *
 * Kernel definition can be found in arch/powerpc/include/uapi/asm/sigcontext.h
 */
#include <signal.h>

// XXX: the identifier rt_sigcontext is expected to be struct by the CRIU code
#define rt_sigcontext sigcontext

#include <compel/sigframe-common.h>

#define RT_SIGFRAME_OFFSET(rt_sigframe) 0

/* Copied from the Linux kernel header arch/powerpc/include/asm/ptrace.h */
#define USER_REDZONE_SIZE 512
#if _CALL_ELF != 2
#error Only supporting ABIv2.
#else
#define STACK_FRAME_MIN_SIZE 32
#endif

/* Copied from the Linux kernel source file arch/powerpc/kernel/signal_64.c */
#define TRAMP_SIZE 6

/*
 * ucontext_t defined in /usr/include/powerpc64le-linux-gnu/sys/ucontext.h
 */
struct rt_sigframe {
	/* sys_rt_sigreturn requires the ucontext be the first field */
	ucontext_t uc;
	ucontext_t uc_transact; /* Transactional state	 */
	unsigned long _unused[2];
	unsigned int tramp[TRAMP_SIZE];
	struct rt_siginfo *pinfo;
	void *puc;
	struct rt_siginfo info;
	/* New 64 bit little-endian ABI allows redzone of 512 bytes below sp */
	char abigap[USER_REDZONE_SIZE];
} __attribute__((aligned(16)));

/* clang-format off */
#define ARCH_RT_SIGRETURN(new_sp, rt_sigframe)			\
        asm volatile(						\
		"mr 1, %0 \n"					\
		"li 0, "__stringify(__NR_rt_sigreturn)" \n"	\
		"sc \n"						\
		:						\
		: "r"(new_sp)					\
		: "memory")
/* clang-format on */

#if _CALL_ELF != 2
#error Only supporting ABIv2.
#else
#define FRAME_MIN_SIZE_PARM 96
#endif

#define RT_SIGFRAME_UC(rt_sigframe)	 (&(rt_sigframe)->uc)
#define RT_SIGFRAME_REGIP(rt_sigframe)	 ((long unsigned int)(rt_sigframe)->uc.uc_mcontext.gp_regs[PT_NIP])
#define RT_SIGFRAME_HAS_FPU(rt_sigframe) (1)
#define RT_SIGFRAME_FPU(rt_sigframe)	 (&(rt_sigframe)->uc.uc_mcontext)

#define rt_sigframe_erase_sigset(sigframe)	memset(&sigframe->uc.uc_sigmask, 0, sizeof(k_rtsigset_t))
#define rt_sigframe_copy_sigset(sigframe, from) memcpy(&sigframe->uc.uc_sigmask, from, sizeof(k_rtsigset_t))

#define MSR_TMA (1UL << 34) /* bit 29 Trans Mem state: Transactional */
#define MSR_TMS (1UL << 33) /* bit 30 Trans Mem state: Suspended */
#define MSR_TM	(1UL << 32) /* bit 31 Trans Mem Available */
#define MSR_VEC (1UL << 25)
#define MSR_VSX (1UL << 23)

#define MSR_TM_ACTIVE(x) ((((x)&MSR_TM) && ((x) & (MSR_TMA | MSR_TMS))) != 0)

#endif /* UAPI_COMPEL_ASM_SIGFRAME_H__ */
