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#ifndef MELVIX_SYSCALL_H
#define MELVIX_SYSCALL_H
#include <stdint.h>
#define DECL_SYSCALL0(fn) int syscall_##fn()
#define DECL_SYSCALL1(fn, p1) int syscall_##fn(p1)
#define DECL_SYSCALL2(fn, p1, p2) int syscall_##fn(p1,p2)
#define DECL_SYSCALL3(fn, p1, p2, p3) int syscall_##fn(p1,p2,p3)
#define DECL_SYSCALL4(fn, p1, p2, p3, p4) int syscall_##fn(p1,p2,p3,p4)
#define DECL_SYSCALL5(fn, p1, p2, p3, p4, p5) int syscall_##fn(p1,p2,p3,p4,p5)
#define DEFN_SYSCALL0(fn, num) \
int syscall_##fn() { \
int a; __asm__ __volatile__("int $0x80" : "=a" (a) : "0" (num)); \
return a; \
}
#define DEFN_SYSCALL1(fn, num, P1) \
int syscall_##fn(P1 p1) { \
int __res; __asm__ __volatile__("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (num), "r" ((int)(p1)) \
: "memory"); \
return __res; \
}
#define DEFN_SYSCALL2(fn, num, P1, P2) \
int syscall_##fn(P1 p1, P2 p2) { \
int __res; __asm__ __volatile__("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (num), "r" ((int)(p1)), "c"((int)(p2)) \
: "memory"); \
return __res; \
}
#define DEFN_SYSCALL3(fn, num, P1, P2, P3) \
int syscall_##fn(P1 p1, P2 p2, P3 p3) { \
int __res; __asm__ __volatile__("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (num), "b" ((int)(p1)), "c"((p2)), "d"((int)(p3)) \
: "memory"); \
return __res; \
}
#define DEFN_SYSCALL4(fn, num, P1, P2, P3, P4) \
int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4) { \
int __res; __asm__ __volatile__("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (num), "b" ((int)(p1)), "c"((int)(p2)), "d"((int)(p3)), "S"((int)(p4)) \
: "memory"); \
return __res; \
}
#define DEFN_SYSCALL5(fn, num, P1, P2, P3, P4, P5) \
int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5) { \
int __res; __asm__ __volatile__("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (num), "b" ((int)(p1)), "c"((int)(p2)), "d"((int)(p3)), "S"((int)(p4)), "D"((int)(p5)) \
: "memory"); \
return __res; \
}
/**
* DECLARATIONS
*/
DECL_SYSCALL0(halt);
DECL_SYSCALL1(write, char *);
DECL_SYSCALL1(read, char *);
DECL_SYSCALL1(writec, char);
DECL_SYSCALL0(readc);
DECL_SYSCALL0(get_pointers);
DECL_SYSCALL1(paging_alloc, uint32_t);
DECL_SYSCALL2(paging_free, uint32_t, uint32_t);
#endif
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