musl/arch/arm/bits/user.h

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typedef struct user_fpregs {
struct fp_reg {
unsigned sign1:1;
unsigned unused:15;
unsigned sign2:1;
unsigned exponent:14;
unsigned j:1;
unsigned mantissa1:31;
unsigned mantissa0:32;
} fpregs[8];
unsigned fpsr:32;
unsigned fpcr:32;
unsigned char ftype[8];
unsigned int init_flag;
} elf_fpregset_t;
struct user_regs {
unsigned long uregs[18];
};
#define ELF_NGREG 18
typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
struct user {
struct user_regs regs;
int u_fpvalid;
unsigned long u_tsize, u_dsize, u_ssize;
unsigned long start_code, start_stack;
long signal;
int reserved;
struct user_regs *u_ar0;
unsigned long magic;
char u_comm[32];
int u_debugreg[8];
struct user_fpregs u_fp;
struct user_fpregs *u_fp0;
};