I am looking at following code from arm64 and riscv64.
ARM64:
https://github.com/openbsd/src/blob/master/sys/arch/arm64/include/signal.h#L51
--------------------------------------------------
struct sigcontext {
int __sc_unused;
int sc_mask; /* signal mask to restore */
unsigned long sc_sp;
unsigned long sc_lr;
unsigned long sc_elr;
unsigned long sc_spsr;
unsigned long sc_x[30];
long sc_cookie;
};
--------------------------------------------------
RISCV64:
https://github.com/openbsd/src/blob/master/sys/arch/riscv64/include/signal.h#L48
--------------------------------------------------
struct sigcontext {
int __sc_unused;
int sc_mask;
__register_t sc_ra;
__register_t sc_sp;
__register_t sc_gp;
__register_t sc_tp;
__register_t sc_t[7];
__register_t sc_s[12];
__register_t sc_a[8];
__register_t sc_sepc;
/* 64 bit floats as well as integer registers */
__register_t sc_f[32]; /* floating-point registers */
__register_t sc_fcsr; /* floating-point control register */
long sc_cookie;
};
--------------------------------------------------
I would like to know what these registers "mean".
Maybe someone knows and can tell me ?
Thank you.
