ref: e969575d2e55eec89d3a2765b974e023123d8fa5
dir: /sys/src/cmd/5i/syscall.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
#define EXTERN
#include "arm.h"
#define ODIRLEN 116 /* compatibility; used in _stat etc. */
#define OERRLEN 64 /* compatibility; used in _stat etc. */
char errbuf[ERRMAX];
ulong nofunc;
#include "/sys/src/libc/9syscall/sys.h"
char* sysctab[] =
{
[SYSR1] "Running",
[_ERRSTR] "_errstr",
[BIND] "Bind",
[CHDIR] "Chdir",
[CLOSE] "Close",
[DUP] "Dup",
[ALARM] "Alarm",
[EXEC] "Exec",
[EXITS] "Exits",
[_FSESSION] "_Fsession",
[FAUTH] "Fauth",
[_FSTAT] "_fstat",
[SEGBRK] "Segbrk",
[MOUNT] "Mount",
[OPEN] "Open",
[_READ] "_Read",
[OSEEK] "Oseek",
[SLEEP] "Sleep",
[_STAT] "_Stat",
[RFORK] "Rfork",
[_WRITE] "_Write",
[PIPE] "Pipe",
[CREATE] "Create",
[FD2PATH] "Fd2path",
[BRK_] "Brk_",
[REMOVE] "Remove",
[_WSTAT] "_Wstat",
[_FWSTAT] "_Fwstat",
[NOTIFY] "Notify",
[NOTED] "Noted",
[SEGATTACH] "Segattach",
[SEGDETACH] "Segdetach",
[SEGFREE] "Segfree",
[SEGFLUSH] "Segflush",
[RENDEZVOUS] "Rendezvous",
[UNMOUNT] "Unmount",
[_WAIT] "_Wait",
[SEEK] "Seek",
[FVERSION] "Fversion",
[ERRSTR] "Errstr",
[STAT] "Stat",
[FSTAT] "Fstat",
[WSTAT] "Wstat",
[FWSTAT] "Fwstat",
[PREAD] "Pread",
[PWRITE] "Pwrite",
[AWAIT] "Await",
};
void
sys1(void)
{
Bprint(bioout, "no system call %s\n", sysctab[reg.r[1]]);
exits(0);
}
void
sys_errstr(void)
{
ulong str;
str = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("errstr(0x%lux)", str);
memio(errbuf, str, OERRLEN, MemWrite);
strcpy(errbuf, "no error");
reg.r[REGRET] = 0;
}
void
syserrstr(void)
{
ulong str;
int n;
str = getmem_w(reg.r[13]+4);
n = getmem_w(reg.r[13]+8);
if(sysdbg)
itrace("errstr(0x%lux, 0x%lux)", str, n);
if(n > strlen(errbuf)+1)
n = strlen(errbuf)+1;
memio(errbuf, str, n, MemWrite);
strcpy(errbuf, "no error");
reg.r[REGRET] = n;
}
void
sysbind(void)
{
ulong pname, pold, flags;
char name[1024], old[1024];
int n;
pname = getmem_w(reg.r[13]+4);
pold = getmem_w(reg.r[13]+8);
flags = getmem_w(reg.r[13]+12);
memio(name, pname, sizeof(name), MemReadstring);
memio(old, pold, sizeof(old), MemReadstring);
if(sysdbg)
itrace("bind(0x%lux='%s', 0x%lux='%s', 0x%lux)", name, name, old, old, flags);
n = bind(name, old, flags);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysfd2path(void)
{
int n;
uint fd;
ulong str;
char buf[1024];
fd = getmem_w(reg.r[13]+4);
str = getmem_w(reg.r[13]+8);
n = getmem_w(reg.r[13]+12);
if(sysdbg)
itrace("fd2path(0x%lux, 0x%lux, 0x%lux)", fd, str, n);
reg.r[1] = -1;
if(n > sizeof buf){
strcpy(errbuf, "buffer too big");
return;
}
n = fd2path(fd, buf, sizeof buf);
if(n < 0)
errstr(buf, sizeof buf);
else
memio(errbuf, str, n, MemWrite);
reg.r[REGRET] = n;
}
void
syschdir(void)
{
char file[1024];
int n;
ulong name;
name = getmem_w(reg.r[13]+4);
memio(file, name, sizeof(file), MemReadstring);
if(sysdbg)
itrace("chdir(0x%lux='%s', 0x%lux)", name, file);
n = chdir(file);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysclose(void)
{
int n;
ulong fd;
fd = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("close(%d)", fd);
n = close(fd);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysdup(void)
{
int oldfd, newfd;
int n;
oldfd = getmem_w(reg.r[13]+4);
newfd = getmem_w(reg.r[13]+8);
if(sysdbg)
itrace("dup(%d, %d)", oldfd, newfd);
n = dup(oldfd, newfd);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysexits(void)
{
char buf[OERRLEN];
ulong str;
str = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("exits(0x%lux)", str);
count = 1;
if(str != 0) {
memio(buf, str, sizeof buf, MemRead);
Bprint(bioout, "exits(%s)\n", buf);
}
else
Bprint(bioout, "exits(0)\n");
}
void
sysopen(void)
{
char file[1024];
int n;
ulong mode, name;
name = getmem_w(reg.r[13]+4);
mode = getmem_w(reg.r[13]+8);
memio(file, name, sizeof(file), MemReadstring);
n = open(file, mode);
if(n < 0)
errstr(errbuf, sizeof errbuf);
if(sysdbg)
itrace("open(0x%lux='%s', 0x%lux) = %d", name, file, mode, n);
reg.r[REGRET] = n;
};
void
sysread(vlong offset)
{
int fd;
ulong size, a;
char *buf, *p;
int n, cnt, c;
fd = getmem_w(reg.r[13]+4);
a = getmem_w(reg.r[13]+8);
size = getmem_w(reg.r[13]+12);
buf = emalloc(size);
if(fd == 0) {
print("\nstdin>>");
p = buf;
n = 0;
cnt = size;
while(cnt) {
c = Bgetc(bin);
if(c <= 0)
break;
*p++ = c;
n++;
cnt--;
if(c == '\n')
break;
}
}
else
n = pread(fd, buf, size, offset);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else
memio(buf, a, n, MemWrite);
if(sysdbg)
itrace("read(%d, 0x%lux, %d, 0x%llx) = %d", fd, a, size, offset, n);
free(buf);
reg.r[REGRET] = n;
}
void
sys_read(void)
{
sysread(-1LL);
}
void
syspread(void)
{
sysread(getmem_v(reg.r[13]+16));
}
void
sysseek(void)
{
int fd;
ulong mode;
ulong retp;
vlong v;
retp = getmem_w(reg.r[13]+4);
fd = getmem_w(reg.r[13]+8);
v = getmem_v(reg.r[13]+16);
mode = getmem_w(reg.r[13]+20);
if(sysdbg)
itrace("seek(%d, %lld, %d)", fd, v, mode);
v = seek(fd, v, mode);
if(v < 0)
errstr(errbuf, sizeof errbuf);
putmem_v(retp, v);
}
void
sysoseek(void)
{
int fd, n;
ulong off, mode;
fd = getmem_w(reg.r[13]+4);
off = getmem_w(reg.r[13]+8);
mode = getmem_w(reg.r[13]+12);
if(sysdbg)
itrace("seek(%d, %lud, %d)", fd, off, mode);
n = seek(fd, off, mode);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
syssleep(void)
{
ulong len;
int n;
len = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("sleep(%d)", len);
n = sleep(len);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sys_stat(void)
{
char nambuf[1024];
char buf[ODIRLEN];
ulong edir, name;
extern int _stat(char*, char*); /* old system call */
int n;
name = getmem_w(reg.r[13]+4);
edir = getmem_w(reg.r[13]+8);
memio(nambuf, name, sizeof(nambuf), MemReadstring);
if(sysdbg)
itrace("stat(0x%lux='%s', 0x%lux)", name, nambuf, edir);
n = _stat(nambuf, buf);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else
memio(buf, edir, ODIRLEN, MemWrite);
reg.r[REGRET] = n;
}
void
sysstat(void)
{
char nambuf[1024];
uchar buf[STATMAX];
ulong edir, name;
int n;
name = getmem_w(reg.r[13]+4);
edir = getmem_w(reg.r[13]+8);
n = getmem_w(reg.r[13]+12);
memio(nambuf, name, sizeof(nambuf), MemReadstring);
if(sysdbg)
itrace("stat(0x%lux='%s', 0x%lux, 0x%lux)", name, nambuf, edir, n);
if(n > sizeof buf)
errstr(errbuf, sizeof errbuf);
else{
n = stat(nambuf, buf, n);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else
memio((char*)buf, edir, n, MemWrite);
}
reg.r[REGRET] = n;
}
void
sys_fstat(void)
{
char buf[ODIRLEN];
extern int _fstat(int, char*); /* old system call */
ulong edir;
int n, fd;
fd = getmem_w(reg.r[13]+4);
edir = getmem_w(reg.r[13]+8);
if(sysdbg)
itrace("fstat(%d, 0x%lux)", fd, edir);
n = _fstat(fd, buf);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else
memio(buf, edir, ODIRLEN, MemWrite);
reg.r[REGRET] = n;
}
void
sysfstat(void)
{
uchar buf[STATMAX];
ulong edir;
int n, fd;
fd = getmem_w(reg.r[13]+4);
edir = getmem_w(reg.r[13]+8);
n = getmem_w(reg.r[13]+12);
if(sysdbg)
itrace("fstat(%d, 0x%lux, 0x%lux)", fd, edir, n);
reg.r[REGRET] = -1;
if(n > sizeof buf){
strcpy(errbuf, "stat buffer too big");
return;
}
n = fstat(fd, buf, n);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else
memio((char*)buf, edir, n, MemWrite);
reg.r[REGRET] = n;
}
void
syswrite(vlong offset)
{
int fd;
ulong size, a;
char *buf;
int n;
fd = getmem_w(reg.r[13]+4);
a = getmem_w(reg.r[13]+8);
size = getmem_w(reg.r[13]+12);
Bflush(bioout);
buf = memio(0, a, size, MemRead);
n = pwrite(fd, buf, size, offset);
if(n < 0)
errstr(errbuf, sizeof errbuf);
if(sysdbg)
itrace("write(%d, %lux, %d, 0x%llx) = %d", fd, a, size, offset, n);
free(buf);
reg.r[REGRET] = n;
}
void
sys_write(void)
{
syswrite(-1LL);
}
void
syspwrite(void)
{
syswrite(getmem_v(reg.r[13]+16));
}
void
syspipe(void)
{
int n, p[2];
ulong fd;
fd = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("pipe(%lux)", fd);
n = pipe(p);
if(n < 0)
errstr(errbuf, sizeof errbuf);
else {
putmem_w(fd, p[0]);
putmem_w(fd+4, p[1]);
}
reg.r[REGRET] = n;
}
void
syscreate(void)
{
char file[1024];
int n;
ulong mode, name, perm;
name = getmem_w(reg.r[13]+4);
mode = getmem_w(reg.r[13]+8);
perm = getmem_w(reg.r[13]+12);
memio(file, name, sizeof(file), MemReadstring);
if(sysdbg)
itrace("create(0x%lux='%s', 0x%lux, 0x%lux)", name, file, mode, perm);
n = create(file, mode, perm);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysbrk_(void)
{
ulong addr, osize, nsize;
Segment *s;
addr = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("brk_(0x%lux)", addr);
reg.r[REGRET] = -1;
if(addr < memory.seg[Data].base+datasize) {
strcpy(errbuf, "address below segment");
return;
}
if(addr > memory.seg[Stack].base) {
strcpy(errbuf, "segment too big");
return;
}
s = &memory.seg[Bss];
if(addr > s->end) {
osize = ((s->end-s->base)/BY2PG)*sizeof(uchar*);
addr = ((addr)+(BY2PG-1))&~(BY2PG-1);
s->end = addr;
nsize = ((s->end-s->base)/BY2PG)*sizeof(uchar*);
s->table = erealloc(s->table, osize, nsize);
}
reg.r[REGRET] = 0;
}
void
sysremove(void)
{
char nambuf[1024];
ulong name;
int n;
name = getmem_w(reg.r[13]+4);
memio(nambuf, name, sizeof(nambuf), MemReadstring);
if(sysdbg)
itrace("remove(0x%lux='%s')", name, nambuf);
n = remove(nambuf);
if(n < 0)
errstr(errbuf, sizeof errbuf);
reg.r[REGRET] = n;
}
void
sysnotify(void)
{
nofunc = getmem_w(reg.r[13]+4);
if(sysdbg)
itrace("notify(0x%lux)\n", nofunc);
reg.r[REGRET] = 0;
}
void
sys_wait(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysawait(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysrfork(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syswstat(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sys_wstat(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysfwstat(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sys_fwstat(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysnoted(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syssegattach(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syssegdetach(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syssegfree(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syssegflush(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysrendezvous(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysunmount(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysfork(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysforkpgrp(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
syssegbrk(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysmount(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysalarm(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysexec(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sys_fsession(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysfauth(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void
sysfversion(void)
{
Bprint(bioout, "No system call %s\n", sysctab[reg.r[REGARG]]);
exits(0);
}
void (*systab[])(void) =
{
[SYSR1] sys1,
[_ERRSTR] sys_errstr,
[BIND] sysbind,
[CHDIR] syschdir,
[CLOSE] sysclose,
[DUP] sysdup,
[ALARM] sysalarm,
[EXEC] sysexec,
[EXITS] sysexits,
[_FSESSION] sys_fsession,
[FAUTH] sysfauth,
[_FSTAT] sys_fstat,
[SEGBRK] syssegbrk,
[MOUNT] sysmount,
[OPEN] sysopen,
[_READ] sys_read,
[OSEEK] sysoseek,
[SLEEP] syssleep,
[_STAT] sys_stat,
[RFORK] sysrfork,
[_WRITE] sys_write,
[PIPE] syspipe,
[CREATE] syscreate,
[FD2PATH] sysfd2path,
[BRK_] sysbrk_,
[REMOVE] sysremove,
[_WSTAT] sys_wstat,
[_FWSTAT] sys_fwstat,
[NOTIFY] sysnotify,
[NOTED] sysnoted,
[SEGATTACH] syssegattach,
[SEGDETACH] syssegdetach,
[SEGFREE] syssegfree,
[SEGFLUSH] syssegflush,
[RENDEZVOUS] sysrendezvous,
[UNMOUNT] sysunmount,
[_WAIT] sys_wait,
[SEEK] sysseek,
[FVERSION] sysfversion,
[ERRSTR] syserrstr,
[STAT] sysstat,
[FSTAT] sysfstat,
[WSTAT] syswstat,
[FWSTAT] sysfwstat,
[PREAD] syspread,
[PWRITE] syspwrite,
[AWAIT] sysawait,
};
void
Ssyscall(ulong)
{
int call;
call = reg.r[REGARG];
if(call < 0 || call >= nelem(systab) || systab[call] == nil) {
Bprint(bioout, "bad system call %d (%#ux)\n", call, call);
dumpreg();
Bflush(bioout);
return;
}
if(trace)
itrace("SWI\t%s", sysctab[call]);
(*systab[call])();
Bflush(bioout);
}