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#include <bits/syscall.h>
#include <sys/syscall.h>
using sc_word_t = __sc_word_t;
// Note: ebx is used for PIC (it holds a reference to the GOT), so we can't clobber it with gcc apparently,
// and also need to make sure to restore it after a syscall
sc_word_t __do_syscall0(long sc) {
sc_word_t ret;
asm volatile("int $0x80" : "=a"(ret) : "a"(sc) : "memory");
return ret;
}
sc_word_t __do_syscall1(long sc, sc_word_t arg1) {
sc_word_t ret;
asm volatile("xchg %%ebx, %%edi;"
"int $0x80;"
"xchg %%edi, %%ebx;"
: "=a"(ret)
: "a"(sc), "D"(arg1)
: "memory");
return ret;
}
sc_word_t __do_syscall2(long sc, sc_word_t arg1, sc_word_t arg2) {
sc_word_t ret;
asm volatile("xchg %%ebx, %%edi;"
"int $0x80;"
"xchg %%edi, %%ebx;"
: "=a"(ret)
: "a"(sc), "D"(arg1), "c"(arg2)
: "memory");
return ret;
}
sc_word_t __do_syscall3(long sc, sc_word_t arg1, sc_word_t arg2, sc_word_t arg3) {
sc_word_t ret;
asm volatile("xchg %%ebx, %%edi;"
"int $0x80;"
"xchg %%edi, %%ebx;"
: "=a"(ret)
: "a"(sc), "D"(arg1), "c"(arg2), "d"(arg3)
: "memory");
return ret;
}
sc_word_t __do_syscall4(long sc, sc_word_t arg1, sc_word_t arg2, sc_word_t arg3, sc_word_t arg4) {
sc_word_t ret;
asm volatile("xchg %%ebx, %%edi;"
"int $0x80;"
"xchg %%edi, %%ebx;"
: "=a"(ret)
: "a"(sc), "D"(arg1), "c"(arg2), "d"(arg3), "S"(arg4)
: "memory");
return ret;
}
sc_word_t __do_syscall5(long sc, sc_word_t arg1, sc_word_t arg2, sc_word_t arg3, sc_word_t arg4,
sc_word_t arg5) {
sc_word_t ret;
asm volatile("pushl %2;"
"push %%ebx;"
"mov 4(%%esp), %%ebx;"
"int $0x80;"
"pop %%ebx;"
"add $4, %%esp;"
: "=a"(ret)
: "a"(sc), "g"(arg1), "c"(arg2), "d"(arg3), "S"(arg4), "D"(arg5)
: "memory");
return ret;
}
sc_word_t __do_syscall6(long sc, sc_word_t arg1, sc_word_t arg2, sc_word_t arg3, sc_word_t arg4,
sc_word_t arg5, sc_word_t arg6) {
sc_word_t ret;
sc_word_t a1a6[2] = { arg1, arg6 };
asm volatile ("pushl %1;"
"push %%ebx;"
"push %%ebp;"
"mov 8(%%esp),%%ebx;"
"mov 4(%%ebx),%%ebp;"
"mov (%%ebx),%%ebx;"
"int $0x80;"
"pop %%ebp;"
"pop %%ebx;"
"add $4,%%esp;"
: "=a"(ret) : "g"(&a1a6), "a"(sc), "c"(arg2), "d"(arg3), "S"(arg4), "D"(arg5) : "memory");
return ret;
}
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