Viewing file:  args.h (2.46 KB) -rw-r--r--
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#ifndef INCLUDED_ARGS_H
#define INCLUDED_ARGS_H
/* This defines the calling sequences for integers and floats. */
#define I0 eax
#define I1 edx
#define I2 ecx
typedef unsigned int size_t;
extern void (*callthis)(void);
extern unsigned long eax,ebx,ecx,edx,esi,edi,esp,ebp;
extern unsigned long sret_eax;
extern volatile unsigned long volatile_var;
extern void snapshot (void);
extern void snapshot_ret (void);
extern void *iamcu_memset (void *, int, size_t);
#define WRAP_CALL(N) \
(callthis = (void (*)()) (N), (typeof (&N)) snapshot)
#define WRAP_RET(N) \
(callthis = (void (*)()) (N), (typeof (&N)) snapshot_ret)
/* Clear all scratch integer registers. */
#define clear_int_hardware_registers \
asm __volatile__ ("xor %%eax, %%eax\n\t" \
"xor %%edx, %%edx\n\t" \
"xor %%ecx, %%ecx\n\t" \
::: "eax", "edx", "ecx");
/* Clear all scratch integer registers, excluding the one used to return
aggregate. */
#define clear_non_sret_int_hardware_registers \
asm __volatile__ ("xor %%edx, %%edx\n\t" \
"xor %%ecx, %%ecx\n\t" \
::: "edx", "ecx");
/* This is the list of registers available for passing arguments. Not all of
these are used or even really available. */
struct IntegerRegisters
{
unsigned long eax, ebx, ecx, edx, esi, edi;
};
/* Implemented in scalarargs.c */
extern struct IntegerRegisters iregs, iregbits;
extern unsigned int num_iregs;
#define check_int_arguments do { \
assert (num_iregs <= 0 || (iregs.I0 & iregbits.I0) == (I0 & iregbits.I0)); \
assert (num_iregs <= 1 || (iregs.I1 & iregbits.I1) == (I1 & iregbits.I1)); \
assert (num_iregs <= 2 || (iregs.I2 & iregbits.I2) == (I2 & iregbits.I2)); \
} while (0)
#define check_char_arguments check_int_arguments
#define check_short_arguments check_int_arguments
#define check_long_arguments check_int_arguments
#define check_float_arguments check_int_arguments
#define check_double_arguments check_int_arguments
#define check_ldouble_arguments check_int_arguments
/* Clear register struct. */
#define clear_struct_registers \
eax = edx = ecx = 0; \
iamcu_memset (&iregs, 0, sizeof iregs);
/* Clear both hardware and register structs for integers. */
#define clear_int_registers \
clear_struct_registers \
clear_int_hardware_registers
/* Clear both hardware and register structs for integers, excluding the
one used to return aggregate. */
#define clear_non_sret_int_registers \
clear_struct_registers \
clear_non_sret_int_hardware_registers
#endif /* INCLUDED_ARGS_H */
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