diff options
Diffstat (limited to 'emu/Linux')
| -rw-r--r-- | emu/Linux/asm-386.S | 52 | ||||
| -rw-r--r-- | emu/Linux/asm-arm.S | 53 | ||||
| -rw-r--r-- | emu/Linux/asm-mips.S | 30 | ||||
| -rw-r--r-- | emu/Linux/asm-power.S | 33 | ||||
| -rw-r--r-- | emu/Linux/asm-spim.S | 29 | ||||
| -rw-r--r-- | emu/Linux/os-clone.c | 531 |
6 files changed, 0 insertions, 728 deletions
diff --git a/emu/Linux/asm-386.S b/emu/Linux/asm-386.S index 31946335..fe5ce6c1 100644 --- a/emu/Linux/asm-386.S +++ b/emu/Linux/asm-386.S @@ -1,59 +1,7 @@ .file "asm-Linux-386.S" -#include "syscall.h" .text /* - * executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) - */ - - .type executeonnewstack,@function - .global executeonnewstack -executeonnewstack: - pushl %ebp - movl %esp, %ebp - pushl %esi - - movl 8(%ebp), %esi /* get tos */ - subl $4, %esi - movl 16(%ebp), %eax - movl %eax, (%esi) /* stash arg on new stack */ - subl $4, %esi - movl 12(%ebp), %eax - movl %eax, (%esi) /* stash tramp on new stack */ - mov %esi, %esp /* swap stacks pronto */ - popl %eax /* recover the tramp address */ - subl %ebp, %ebp /* stop stack traceback here */ - call *%eax /* and jump to it (ho ho) */ - - /* if we return here, tramp didn't do its job */ - - addl $8, %esp /* clean up for pose value */ - - leal SYS_exit, %eax - int $0x80 - -/* - * unlockandexit(int *key) - * - * NB: the return status may be garbaged if the stack is reused - * between the unlock and the system call, but this should - * not matter since no task is waiting for the result - */ - - .type unlockandexit,@function - .global unlockandexit -unlockandexit: - pushl %ebp - movl %esp, %ebp - - movl 8(%ebp), %esi /* get the key address */ - pushl $0 /* exit status 0 */ - movl $0, %eax /* unlock the stack allocator */ - movl %eax, (%esi) - leal SYS_exit, %eax /* call exit */ - int $0x80 - -/* * umult(ulong m1, ulong m2, ulong *hi) */ diff --git a/emu/Linux/asm-arm.S b/emu/Linux/asm-arm.S index 90a337ff..5446dde6 100644 --- a/emu/Linux/asm-arm.S +++ b/emu/Linux/asm-arm.S @@ -1,60 +1,7 @@ .file "asm-Linux-arm.S" -#include "syscall.h" .text /* - * void executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) - */ - - .align 2 - .global executeonnewstack - .type executeonnewstack, %function -executeonnewstack: - @ args = 0, pretend = 0, frame = 12 - @ frame_needed = 1, uses_anonymous_args = 0 - mov ip, sp - stmfd sp!, {fp, ip, lr, pc} - sub fp, ip, #4 - sub sp, sp, #12 - str r0, [fp, #-16] /* store tos */ - str r1, [fp, #-20] /* store tramp */ - str r2, [fp, #-24] /* store arg */ - ldr r0, [fp, #-24] /* get arg */ - ldr r2, [fp, #-16] /* get tos */ - mov sp, r2 /* set new stack */ - mov lr, pc - blx r1 /* call tramp*/ - - /* if we return here, tramp didn't do it's job */ - mov r0, #0 - mov r7, #SYS_exit - swi 0x0 - ldmea fp, {fp, sp, pc} - .size executeonnewstack, .-executeonnewstack - -/* - * void unlockandexit(int *key) - */ - - .align 2 - .global unlockandexit - .type unlockandexit, %function -unlockandexit: - @ args = 0, pretend = 0, frame = 4 - @ frame_needed = 1, uses_anonymous_args = 0 - mov ip, sp - stmfd sp!, {fp, ip, lr, pc} - sub fp, ip, #4 - sub sp, sp, #4 - mov r1, #0 - str r1, [r0] - mov r0, #0 - mov r7, #SYS_exit - swi 0x0 - ldmea fp, {fp, sp, pc} - .size unlockandexit, .-unlockandexit - -/* * ulong umult(ulong m1, ulong m2, ulong *hi) */ diff --git a/emu/Linux/asm-mips.S b/emu/Linux/asm-mips.S index 087b8550..d2780f6a 100644 --- a/emu/Linux/asm-mips.S +++ b/emu/Linux/asm-mips.S @@ -1,37 +1,7 @@ -#include "syscall.h" #include <sys/asm.h> #include <sys/regdef.h> #include <asm/cachectl.h> -/* - * executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) - */ - -LEAF(executeonnewstack) - and a0,a0,~7 - addu sp,a0,-16 - move a0,a2 - move t9,a1 - jalr t9 - - li v0,SYS_exit - li a0,0 - syscall - - END(executeonnewstack) - -/* - * unlockandexit(int *key) - */ - -LEAF(unlockandexit) - lw a1,0(a0) - li v0,SYS_exit - li a0,0 - sw a0,0(a1) - syscall - END(unlockandexit) - LEAF(FPsave) cfc1 t0, $31 sw t0, 0(a0) /* a0 is argument */ diff --git a/emu/Linux/asm-power.S b/emu/Linux/asm-power.S index 6af21fba..7187f938 100644 --- a/emu/Linux/asm-power.S +++ b/emu/Linux/asm-power.S @@ -59,36 +59,3 @@ _tas: 2: sync blr - -/* - * void - * executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) - */ - .align 2 - .global executeonnewstack -executeonnewstack: - mr %r1,%r3 /* change stacks */ - stwu %lr,-16(%r1) /* save lr to aid the traceback */ - li %r0,0 - stw %r0,20(%r1) - mr %r3,%r5 - mtctr %r4 - bctrl /* tramp(arg) */ - br - -/* - * void unlockandexit(int *key) - * - * NB: the return status may be garbaged if the stack is reused - * between the unlock and the system call, but this should - * not matter since no task is waiting for the result - */ - .align 2 - .globl unlockandexit -unlockandexit: - li %r0,0x0 - stw %r0,0(%r3) /* unlock */ - li %r0,1 /* sys exit; 234 is exit group */ - li %r3,0 /* exit status */ - sc - br diff --git a/emu/Linux/asm-spim.S b/emu/Linux/asm-spim.S index 087b8550..77ae3d4c 100644 --- a/emu/Linux/asm-spim.S +++ b/emu/Linux/asm-spim.S @@ -1,36 +1,7 @@ -#include "syscall.h" #include <sys/asm.h> #include <sys/regdef.h> #include <asm/cachectl.h> -/* - * executeonnewstack(void *tos, void (*tramp)(void *arg), void *arg) - */ - -LEAF(executeonnewstack) - and a0,a0,~7 - addu sp,a0,-16 - move a0,a2 - move t9,a1 - jalr t9 - - li v0,SYS_exit - li a0,0 - syscall - - END(executeonnewstack) - -/* - * unlockandexit(int *key) - */ - -LEAF(unlockandexit) - lw a1,0(a0) - li v0,SYS_exit - li a0,0 - sw a0,0(a1) - syscall - END(unlockandexit) LEAF(FPsave) cfc1 t0, $31 diff --git a/emu/Linux/os-clone.c b/emu/Linux/os-clone.c deleted file mode 100644 index 992235d4..00000000 --- a/emu/Linux/os-clone.c +++ /dev/null @@ -1,531 +0,0 @@ -#include <sys/types.h> -#include <time.h> -#include <termios.h> -#include <signal.h> -#include <pwd.h> -#include <sched.h> -#include <sys/resource.h> -#include <sys/wait.h> -#include <sys/time.h> - -#include <stdint.h> - -#include "dat.h" -#include "fns.h" -#include "error.h" - -#include <semaphore.h> - -#include <raise.h> - -/* glibc 2.3.3-NTPL messes up getpid() by trying to cache the result, so we'll do it ourselves */ -#include <sys/syscall.h> -#define getpid() syscall(SYS_getpid) - -/* temporarily suppress CLONE_PTRACE so it works on broken Linux kernels */ -#undef CLONE_PTRACE -#define CLONE_PTRACE 0 - -enum -{ - DELETE = 0x7f, - CTRLC = 'C'-'@', - NSTACKSPERALLOC = 16, - X11STACK= 256*1024 -}; -char *hosttype = "Linux"; - -extern void unlockandexit(int*); -extern void executeonnewstack(void*, void (*f)(void*), void*); - -static void *stackalloc(Proc *p, void **tos); -static void stackfreeandexit(void *stack); - -typedef sem_t Sem; - -extern int dflag; - -int gidnobody = -1; -int uidnobody = -1; -static struct termios tinit; - -void -pexit(char *msg, int t) -{ - Osenv *e; - Proc *p; - Sem *sem; - void *kstack; - - lock(&procs.l); - p = up; - if(p->prev) - p->prev->next = p->next; - else - procs.head = p->next; - - if(p->next) - p->next->prev = p->prev; - else - procs.tail = p->prev; - unlock(&procs.l); - - if(0) - print("pexit: %s: %s\n", p->text, msg); - - e = p->env; - if(e != nil) { - closefgrp(e->fgrp); - closepgrp(e->pgrp); - closeegrp(e->egrp); - closesigs(e->sigs); - free(e->user); - } - kstack = p->kstack; - free(p->prog); - sem = p->os; - if(sem != nil) - sem_destroy(sem); - free(p->os); - free(p); - if(kstack != nil) - stackfreeandexit(kstack); -} - -int -tramp(void *arg) -{ - Proc *p; - p = arg; - p->pid = p->sigid = getpid(); - (*p->func)(p->arg); - pexit("{Tramp}", 0); - return 0; /* not reached */ -} - -void -kproc(char *name, void (*func)(void*), void *arg, int flags) -{ - Proc *p; - Pgrp *pg; - Fgrp *fg; - Egrp *eg; - void *tos; - Sem *sem; - - p = newproc(); - if(0) - print("start %s:%#p\n", name, p); - if(p == nil) - panic("kproc(%s): no memory", name); - - sem = malloc(sizeof(*sem)); - if(sem == nil) - panic("can't allocate semaphore"); - sem_init(sem, 0, 0); - p->os = sem; - - if(flags & KPDUPPG) { - pg = up->env->pgrp; - incref(&pg->r); - p->env->pgrp = pg; - } - if(flags & KPDUPFDG) { - fg = up->env->fgrp; - incref(&fg->r); - p->env->fgrp = fg; - } - if(flags & KPDUPENVG) { - eg = up->env->egrp; - incref(&eg->r); - p->env->egrp = eg; - } - - p->env->uid = up->env->uid; - p->env->gid = up->env->gid; - kstrdup(&p->env->user, up->env->user); - - strcpy(p->text, name); - - p->func = func; - p->arg = arg; - - if(flags & KPX11){ - p->kstack = nil; /* never freed; also up not defined */ - tos = (char*)mallocz(X11STACK, 0) + X11STACK - sizeof(vlong); - }else - p->kstack = stackalloc(p, &tos); - - lock(&procs.l); - if(procs.tail != nil) { - p->prev = procs.tail; - procs.tail->next = p; - } - else { - procs.head = p; - p->prev = nil; - } - procs.tail = p; - unlock(&procs.l); - - if(clone(tramp, tos, CLONE_PTRACE|CLONE_VM|CLONE_FS|CLONE_FILES|SIGCHLD, p, nil, nil, nil) <= 0) - panic("kproc: clone failed"); -} - -static void -sysfault(char *what, void *addr) -{ - char buf[64]; - - snprint(buf, sizeof(buf), "sys: %s%#p", what, addr); - disfault(nil, buf); -} - -static void -trapILL(int signo, siginfo_t *si, void *a) -{ - USED(signo); - USED(a); - sysfault("illegal instruction pc=", si->si_addr); -} - -static int -isnilref(siginfo_t *si) -{ - return si != 0 && (si->si_addr == (void*)~(uintptr_t)0 || (uintptr_t)si->si_addr < 512); -} - -static void -trapmemref(int signo, siginfo_t *si, void *a) -{ - USED(a); /* ucontext_t*, could fetch pc in machine-dependent way */ - if(isnilref(si)) - disfault(nil, exNilref); - else if(signo == SIGBUS) - sysfault("bad address addr=", si->si_addr); /* eg, misaligned */ - else - sysfault("segmentation violation addr=", si->si_addr); -} - -static void -trapFPE(int signo, siginfo_t *si, void *a) -{ - char buf[64]; - - USED(signo); - USED(a); - snprint(buf, sizeof(buf), "sys: fp: exception status=%.4lux pc=%#p", getfsr(), si->si_addr); - disfault(nil, buf); -} - -static void -trapUSR1(int signo) -{ - int intwait; - - USED(signo); - - intwait = up->intwait; - up->intwait = 0; /* clear it to let proc continue in osleave */ - - if(up->type != Interp) /* Used to unblock pending I/O */ - return; - - if(intwait == 0) /* Not posted so it's a sync error */ - disfault(nil, Eintr); /* Should never happen */ -} - -/* called to wake up kproc blocked on a syscall */ -void -oshostintr(Proc *p) -{ - kill(p->sigid, SIGUSR1); -} - -void -osblock(void) -{ - Sem *sem; - - sem = up->os; - while(sem_wait(sem)) - {} /* retry on signals (which shouldn't happen) */ -} - -void -osready(Proc *p) -{ - sem_post(p->os); -} - -void -oslongjmp(void *regs, osjmpbuf env, int val) -{ - USED(regs); - siglongjmp(env, val); -} - -static void -termset(void) -{ - struct termios t; - - tcgetattr(0, &t); - tinit = t; - t.c_lflag &= ~(ICANON|ECHO|ISIG); - t.c_cc[VMIN] = 1; - t.c_cc[VTIME] = 0; - tcsetattr(0, TCSANOW, &t); -} - -static void -termrestore(void) -{ - tcsetattr(0, TCSANOW, &tinit); -} - -void -cleanexit(int x) -{ - USED(x); - - if(up->intwait) { - up->intwait = 0; - return; - } - - if(dflag == 0) - termrestore(); - - kill(0, SIGKILL); - exit(0); -} - -void -osreboot(char *file, char **argv) -{ - if(dflag == 0) - termrestore(); - execvp(file, argv); - error("reboot failure"); -} - -void -libinit(char *imod) -{ - struct sigaction act; - struct passwd *pw; - Proc *p; - void *tos; - char sys[64]; - - setsid(); - - gethostname(sys, sizeof(sys)); - kstrdup(&ossysname, sys); - pw = getpwnam("nobody"); - if(pw != nil) { - uidnobody = pw->pw_uid; - gidnobody = pw->pw_gid; - } - - if(dflag == 0) - termset(); - - memset(&act, 0, sizeof(act)); - act.sa_handler = trapUSR1; - sigaction(SIGUSR1, &act, nil); - - act.sa_handler = SIG_IGN; - sigaction(SIGCHLD, &act, nil); - - /* - * For the correct functioning of devcmd in the - * face of exiting slaves - */ - signal(SIGPIPE, SIG_IGN); - if(signal(SIGTERM, SIG_IGN) != SIG_IGN) - signal(SIGTERM, cleanexit); - if(signal(SIGINT, SIG_IGN) != SIG_IGN) - signal(SIGINT, cleanexit); - - if(sflag == 0) { - act.sa_flags = SA_SIGINFO; - act.sa_sigaction = trapILL; - sigaction(SIGILL, &act, nil); - act.sa_sigaction = trapFPE; - sigaction(SIGFPE, &act, nil); - act.sa_sigaction = trapmemref; - sigaction(SIGBUS, &act, nil); - sigaction(SIGSEGV, &act, nil); - act.sa_flags &= ~SA_SIGINFO; - } - - p = newproc(); - p->kstack = stackalloc(p, &tos); - - pw = getpwuid(getuid()); - if(pw != nil) - kstrdup(&eve, pw->pw_name); - else - print("cannot getpwuid\n"); - - p->env->uid = getuid(); - p->env->gid = getgid(); - - executeonnewstack(tos, emuinit, imod); -} - -int -readkbd(void) -{ - int n; - char buf[1]; - - n = read(0, buf, sizeof(buf)); - if(n < 0) - print("keyboard close (n=%d, %s)\n", n, strerror(errno)); - if(n <= 0) - pexit("keyboard thread", 0); - - switch(buf[0]) { - case '\r': - buf[0] = '\n'; - break; - case DELETE: - buf[0] = 'H' - '@'; - break; - case CTRLC: - cleanexit(0); - break; - } - return buf[0]; -} - -/* - * Return an abitrary millisecond clock time - */ -long -osmillisec(void) -{ - static long sec0 = 0, usec0; - struct timeval t; - - if(gettimeofday(&t,(struct timezone*)0)<0) - return 0; - - if(sec0 == 0) { - sec0 = t.tv_sec; - usec0 = t.tv_usec; - } - return (t.tv_sec-sec0)*1000+(t.tv_usec-usec0+500)/1000; -} - -/* - * Return the time since the epoch in nanoseconds and microseconds - * The epoch is defined at 1 Jan 1970 - */ -vlong -osnsec(void) -{ - struct timeval t; - - gettimeofday(&t, nil); - return (vlong)t.tv_sec*1000000000L + t.tv_usec*1000; -} - -vlong -osusectime(void) -{ - struct timeval t; - - gettimeofday(&t, nil); - return (vlong)t.tv_sec * 1000000 + t.tv_usec; -} - -int -osmillisleep(ulong milsec) -{ - struct timespec time; - - time.tv_sec = milsec/1000; - time.tv_nsec= (milsec%1000)*1000000; - nanosleep(&time, NULL); - return 0; -} - -int -limbosleep(ulong milsec) -{ - return osmillisleep(milsec); -} - -void -osyield(void) -{ - sched_yield(); -} - -void -ospause(void) -{ - for(;;) - pause(); -} - -void -oslopri(void) -{ - setpriority(PRIO_PROCESS, 0, getpriority(PRIO_PROCESS,0)+4); -} - -static struct { - Lock l; - void *free; -} stacklist; - -static void -_stackfree(void *stack) -{ - *((void **)stack) = stacklist.free; - stacklist.free = stack; -} - -static void -stackfreeandexit(void *stack) -{ - lock(&stacklist.l); - _stackfree(stack); - unlockandexit(&stacklist.l.val); -} - -static void * -stackalloc(Proc *p, void **tos) -{ - void *rv; - lock(&stacklist.l); - if (stacklist.free == 0) { - int x; - /* - * obtain some more by using sbrk() - */ - void *more = sbrk(KSTACK * (NSTACKSPERALLOC + 1)); - if (more == 0) - panic("stackalloc: no more stacks"); - /* - * align to KSTACK - */ - more = (void *)((((unsigned long)more) + (KSTACK - 1)) & ~(KSTACK - 1)); - /* - * free all the new stacks onto the freelist - */ - for (x = 0; x < NSTACKSPERALLOC; x++) - _stackfree((char *)more + KSTACK * x); - } - rv = stacklist.free; - stacklist.free = *(void **)rv; - unlock(&stacklist.l); - *tos = rv + KSTACK - sizeof(vlong); - *(Proc **)rv = p; - return rv; -} |