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user: implement mlibc as the libc, finally.

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It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>
This commit is contained in:
kaguya
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
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user/include/mlibc/sysdeps/kirkos/syscall.cpp
+124
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@@ -0,0 +1,124 @@
#include <bits/syscall.h>
#include <errno.h>
extern "C" long __do_syscall_ret(unsigned long ret) {
return ret;
}
using sc_word_t = long;
sc_word_t __do_syscall0(long sc) {
register long sc_reg asm("rax") = sc;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) : "r"(sc_reg) : "rcx", "r11", "memory");
return ret;
}
sc_word_t __do_syscall1(long sc, sc_word_t arg1) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg)
: "rcx", "r11", "memory");
return ret;
}
sc_word_t __do_syscall2(long sc, sc_word_t arg1, sc_word_t arg2) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t arg2_reg asm("rsi") = arg2;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg),
"r"(arg2_reg)
: "rcx", "r11", "memory");
return ret;
}
sc_word_t __do_syscall3(long sc, sc_word_t arg1, sc_word_t arg2, sc_word_t arg3) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t arg2_reg asm("rsi") = arg2;
register sc_word_t arg3_reg asm("rdx") = arg3;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg),
"r"(arg2_reg),
"r"(arg3_reg)
: "rcx", "r11", "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) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t arg2_reg asm("rsi") = arg2;
register sc_word_t arg3_reg asm("rdx") = arg3;
register sc_word_t arg4_reg asm("r10") = arg4; // arg4 must be in r10 on x86_64
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg),
"r"(arg2_reg),
"r"(arg3_reg),
"r"(arg4_reg)
: "rcx", "r11", "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) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t arg2_reg asm("rsi") = arg2;
register sc_word_t arg3_reg asm("rdx") = arg3;
register sc_word_t arg4_reg asm("r10") = arg4;
register sc_word_t arg5_reg asm("r8") = arg5;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg),
"r"(arg2_reg),
"r"(arg3_reg),
"r"(arg4_reg),
"r"(arg5_reg)
: "rcx", "r11", "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) {
register long sc_reg asm("rax") = sc;
register sc_word_t arg1_reg asm("rdi") = arg1;
register sc_word_t arg2_reg asm("rsi") = arg2;
register sc_word_t arg3_reg asm("rdx") = arg3;
register sc_word_t arg4_reg asm("r10") = arg4;
register sc_word_t arg5_reg asm("r8") = arg5;
register sc_word_t arg6_reg asm("r9") = arg6;
register sc_word_t ret asm("rax");
asm volatile ("syscall" : "=r"(ret) :
"r"(sc_reg),
"r"(arg1_reg),
"r"(arg2_reg),
"r"(arg3_reg),
"r"(arg4_reg),
"r"(arg5_reg),
"r"(arg6_reg)
: "rcx", "r11", "memory");
return ret;
}
/* x86_64 only supports 6 arguments in the syscall ABI. The 7th argument is ignored
* (no syscall in Linux or your kernel uses 7 scalar arguments). */
sc_word_t __do_syscall7(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 arg7) {
(void)arg7;
return __do_syscall6(sc, arg1, arg2, arg3, arg4, arg5, arg6);
}