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Diffstat (limited to 'arch/sparc/kernel/ptrace.c')
-rw-r--r--arch/sparc/kernel/ptrace.c621
1 files changed, 0 insertions, 621 deletions
diff --git a/arch/sparc/kernel/ptrace.c b/arch/sparc/kernel/ptrace.c
deleted file mode 100644
index 475c4c13462..00000000000
--- a/arch/sparc/kernel/ptrace.c
+++ /dev/null
@@ -1,621 +0,0 @@
-/* ptrace.c: Sparc process tracing support.
- *
- * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
- *
- * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
- * and David Mosberger.
- *
- * Added Linux support -miguel (weird, eh?, the orignal code was meant
- * to emulate SunOS).
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/security.h>
-#include <linux/signal.h>
-
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#define MAGIC_CONSTANT 0x80000000
-
-
-/* Returning from ptrace is a bit tricky because the syscall return
- * low level code assumes any value returned which is negative and
- * is a valid errno will mean setting the condition codes to indicate
- * an error return. This doesn't work, so we have this hook.
- */
-static inline void pt_error_return(struct pt_regs *regs, unsigned long error)
-{
- regs->u_regs[UREG_I0] = error;
- regs->psr |= PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static inline void pt_succ_return(struct pt_regs *regs, unsigned long value)
-{
- regs->u_regs[UREG_I0] = value;
- regs->psr &= ~PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static void
-pt_succ_return_linux(struct pt_regs *regs, unsigned long value, long __user *addr)
-{
- if (put_user(value, addr)) {
- pt_error_return(regs, EFAULT);
- return;
- }
- regs->u_regs[UREG_I0] = 0;
- regs->psr &= ~PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static void
-pt_os_succ_return (struct pt_regs *regs, unsigned long val, long __user *addr)
-{
- if (current->personality == PER_SUNOS)
- pt_succ_return (regs, val);
- else
- pt_succ_return_linux (regs, val, addr);
-}
-
-/* Fuck me gently with a chainsaw... */
-static inline void read_sunos_user(struct pt_regs *regs, unsigned long offset,
- struct task_struct *tsk, long __user *addr)
-{
- struct pt_regs *cregs = tsk->thread.kregs;
- struct thread_info *t = tsk->thread_info;
- int v;
-
- if(offset >= 1024)
- offset -= 1024; /* whee... */
- if(offset & ((sizeof(unsigned long) - 1))) {
- pt_error_return(regs, EIO);
- return;
- }
- if(offset >= 16 && offset < 784) {
- offset -= 16; offset >>= 2;
- pt_os_succ_return(regs, *(((unsigned long *)(&t->reg_window[0]))+offset), addr);
- return;
- }
- if(offset >= 784 && offset < 832) {
- offset -= 784; offset >>= 2;
- pt_os_succ_return(regs, *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset), addr);
- return;
- }
- switch(offset) {
- case 0:
- v = t->ksp;
- break;
- case 4:
- v = t->kpc;
- break;
- case 8:
- v = t->kpsr;
- break;
- case 12:
- v = t->uwinmask;
- break;
- case 832:
- v = t->w_saved;
- break;
- case 896:
- v = cregs->u_regs[UREG_I0];
- break;
- case 900:
- v = cregs->u_regs[UREG_I1];
- break;
- case 904:
- v = cregs->u_regs[UREG_I2];
- break;
- case 908:
- v = cregs->u_regs[UREG_I3];
- break;
- case 912:
- v = cregs->u_regs[UREG_I4];
- break;
- case 916:
- v = cregs->u_regs[UREG_I5];
- break;
- case 920:
- v = cregs->u_regs[UREG_I6];
- break;
- case 924:
- if(tsk->thread.flags & MAGIC_CONSTANT)
- v = cregs->u_regs[UREG_G1];
- else
- v = 0;
- break;
- case 940:
- v = cregs->u_regs[UREG_I0];
- break;
- case 944:
- v = cregs->u_regs[UREG_I1];
- break;
-
- case 948:
- /* Isn't binary compatibility _fun_??? */
- if(cregs->psr & PSR_C)
- v = cregs->u_regs[UREG_I0] << 24;
- else
- v = 0;
- break;
-
- /* Rest of them are completely unsupported. */
- default:
- printk("%s [%d]: Wants to read user offset %ld\n",
- current->comm, current->pid, offset);
- pt_error_return(regs, EIO);
- return;
- }
- if (current->personality == PER_SUNOS)
- pt_succ_return (regs, v);
- else
- pt_succ_return_linux (regs, v, addr);
- return;
-}
-
-static inline void write_sunos_user(struct pt_regs *regs, unsigned long offset,
- struct task_struct *tsk)
-{
- struct pt_regs *cregs = tsk->thread.kregs;
- struct thread_info *t = tsk->thread_info;
- unsigned long value = regs->u_regs[UREG_I3];
-
- if(offset >= 1024)
- offset -= 1024; /* whee... */
- if(offset & ((sizeof(unsigned long) - 1)))
- goto failure;
- if(offset >= 16 && offset < 784) {
- offset -= 16; offset >>= 2;
- *(((unsigned long *)(&t->reg_window[0]))+offset) = value;
- goto success;
- }
- if(offset >= 784 && offset < 832) {
- offset -= 784; offset >>= 2;
- *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset) = value;
- goto success;
- }
- switch(offset) {
- case 896:
- cregs->u_regs[UREG_I0] = value;
- break;
- case 900:
- cregs->u_regs[UREG_I1] = value;
- break;
- case 904:
- cregs->u_regs[UREG_I2] = value;
- break;
- case 908:
- cregs->u_regs[UREG_I3] = value;
- break;
- case 912:
- cregs->u_regs[UREG_I4] = value;
- break;
- case 916:
- cregs->u_regs[UREG_I5] = value;
- break;
- case 920:
- cregs->u_regs[UREG_I6] = value;
- break;
- case 924:
- cregs->u_regs[UREG_I7] = value;
- break;
- case 940:
- cregs->u_regs[UREG_I0] = value;
- break;
- case 944:
- cregs->u_regs[UREG_I1] = value;
- break;
-
- /* Rest of them are completely unsupported or "no-touch". */
- default:
- printk("%s [%d]: Wants to write user offset %ld\n",
- current->comm, current->pid, offset);
- goto failure;
- }
-success:
- pt_succ_return(regs, 0);
- return;
-failure:
- pt_error_return(regs, EIO);
- return;
-}
-
-/* #define ALLOW_INIT_TRACING */
-/* #define DEBUG_PTRACE */
-
-#ifdef DEBUG_PTRACE
-char *pt_rq [] = {
- /* 0 */ "TRACEME", "PEEKTEXT", "PEEKDATA", "PEEKUSR",
- /* 4 */ "POKETEXT", "POKEDATA", "POKEUSR", "CONT",
- /* 8 */ "KILL", "SINGLESTEP", "SUNATTACH", "SUNDETACH",
- /* 12 */ "GETREGS", "SETREGS", "GETFPREGS", "SETFPREGS",
- /* 16 */ "READDATA", "WRITEDATA", "READTEXT", "WRITETEXT",
- /* 20 */ "GETFPAREGS", "SETFPAREGS", "unknown", "unknown",
- /* 24 */ "SYSCALL", ""
-};
-#endif
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do */
-}
-
-asmlinkage void do_ptrace(struct pt_regs *regs)
-{
- unsigned long request = regs->u_regs[UREG_I0];
- unsigned long pid = regs->u_regs[UREG_I1];
- unsigned long addr = regs->u_regs[UREG_I2];
- unsigned long data = regs->u_regs[UREG_I3];
- unsigned long addr2 = regs->u_regs[UREG_I4];
- struct task_struct *child;
- int ret;
-
- lock_kernel();
-#ifdef DEBUG_PTRACE
- {
- char *s;
-
- if ((request >= 0) && (request <= 24))
- s = pt_rq [request];
- else
- s = "unknown";
-
- if (request == PTRACE_POKEDATA && data == 0x91d02001){
- printk ("do_ptrace: breakpoint pid=%d, addr=%08lx addr2=%08lx\n",
- pid, addr, addr2);
- } else
- printk("do_ptrace: rq=%s(%d) pid=%d addr=%08lx data=%08lx addr2=%08lx\n",
- s, (int) request, (int) pid, addr, data, addr2);
- }
-#endif
- if (request == PTRACE_TRACEME) {
- int my_ret;
-
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED) {
- pt_error_return(regs, EPERM);
- goto out;
- }
- my_ret = security_ptrace(current->parent, current);
- if (my_ret) {
- pt_error_return(regs, -my_ret);
- goto out;
- }
-
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
- pt_succ_return(regs, 0);
- goto out;
- }
-#ifndef ALLOW_INIT_TRACING
- if (pid == 1) {
- /* Can't dork with init. */
- pt_error_return(regs, EPERM);
- goto out;
- }
-#endif
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
-
- if (!child) {
- pt_error_return(regs, ESRCH);
- goto out;
- }
-
- if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
- || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
- if (ptrace_attach(child)) {
- pt_error_return(regs, EPERM);
- goto out_tsk;
- }
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0) {
- pt_error_return(regs, -ret);
- goto out_tsk;
- }
-
- switch(request) {
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA: {
- unsigned long tmp;
-
- if (access_process_vm(child, addr,
- &tmp, sizeof(tmp), 0) == sizeof(tmp))
- pt_os_succ_return(regs, tmp, (long __user *)data);
- else
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
- case PTRACE_PEEKUSR:
- read_sunos_user(regs, addr, child, (long __user *) data);
- goto out_tsk;
-
- case PTRACE_POKEUSR:
- write_sunos_user(regs, addr, child);
- goto out_tsk;
-
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA: {
- if (access_process_vm(child, addr,
- &data, sizeof(data), 1) == sizeof(data))
- pt_succ_return(regs, 0);
- else
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
- case PTRACE_GETREGS: {
- struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
- struct pt_regs *cregs = child->thread.kregs;
- int rval;
-
- if (!access_ok(VERIFY_WRITE, pregs, sizeof(struct pt_regs))) {
- rval = -EFAULT;
- pt_error_return(regs, -rval);
- goto out_tsk;
- }
- __put_user(cregs->psr, (&pregs->psr));
- __put_user(cregs->pc, (&pregs->pc));
- __put_user(cregs->npc, (&pregs->npc));
- __put_user(cregs->y, (&pregs->y));
- for(rval = 1; rval < 16; rval++)
- __put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]));
- pt_succ_return(regs, 0);
-#ifdef DEBUG_PTRACE
- printk ("PC=%x nPC=%x o7=%x\n", cregs->pc, cregs->npc, cregs->u_regs [15]);
-#endif
- goto out_tsk;
- }
-
- case PTRACE_SETREGS: {
- struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
- struct pt_regs *cregs = child->thread.kregs;
- unsigned long psr, pc, npc, y;
- int i;
-
- /* Must be careful, tracing process can only set certain
- * bits in the psr.
- */
- if (!access_ok(VERIFY_READ, pregs, sizeof(struct pt_regs))) {
- pt_error_return(regs, EFAULT);
- goto out_tsk;
- }
- __get_user(psr, (&pregs->psr));
- __get_user(pc, (&pregs->pc));
- __get_user(npc, (&pregs->npc));
- __get_user(y, (&pregs->y));
- psr &= PSR_ICC;
- cregs->psr &= ~PSR_ICC;
- cregs->psr |= psr;
- if (!((pc | npc) & 3)) {
- cregs->pc = pc;
- cregs->npc =npc;
- }
- cregs->y = y;
- for(i = 1; i < 16; i++)
- __get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]));
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- case PTRACE_GETFPREGS: {
- struct fps {
- unsigned long regs[32];
- unsigned long fsr;
- unsigned long flags;
- unsigned long extra;
- unsigned long fpqd;
- struct fq {
- unsigned long *insnaddr;
- unsigned long insn;
- } fpq[16];
- };
- struct fps __user *fps = (struct fps __user *) addr;
- int i;
-
- if (!access_ok(VERIFY_WRITE, fps, sizeof(struct fps))) {
- i = -EFAULT;
- pt_error_return(regs, -i);
- goto out_tsk;
- }
- for(i = 0; i < 32; i++)
- __put_user(child->thread.float_regs[i], (&fps->regs[i]));
- __put_user(child->thread.fsr, (&fps->fsr));
- __put_user(child->thread.fpqdepth, (&fps->fpqd));
- __put_user(0, (&fps->flags));
- __put_user(0, (&fps->extra));
- for(i = 0; i < 16; i++) {
- __put_user(child->thread.fpqueue[i].insn_addr,
- (&fps->fpq[i].insnaddr));
- __put_user(child->thread.fpqueue[i].insn, (&fps->fpq[i].insn));
- }
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- case PTRACE_SETFPREGS: {
- struct fps {
- unsigned long regs[32];
- unsigned long fsr;
- unsigned long flags;
- unsigned long extra;
- unsigned long fpqd;
- struct fq {
- unsigned long *insnaddr;
- unsigned long insn;
- } fpq[16];
- };
- struct fps __user *fps = (struct fps __user *) addr;
- int i;
-
- if (!access_ok(VERIFY_READ, fps, sizeof(struct fps))) {
- i = -EFAULT;
- pt_error_return(regs, -i);
- goto out_tsk;
- }
- copy_from_user(&child->thread.float_regs[0], &fps->regs[0], (32 * sizeof(unsigned long)));
- __get_user(child->thread.fsr, (&fps->fsr));
- __get_user(child->thread.fpqdepth, (&fps->fpqd));
- for(i = 0; i < 16; i++) {
- __get_user(child->thread.fpqueue[i].insn_addr,
- (&fps->fpq[i].insnaddr));
- __get_user(child->thread.fpqueue[i].insn, (&fps->fpq[i].insn));
- }
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- case PTRACE_READTEXT:
- case PTRACE_READDATA: {
- int res = ptrace_readdata(child, addr,
- (void __user *) addr2, data);
-
- if (res == data) {
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- /* Partial read is an IO failure */
- if (res >= 0)
- res = -EIO;
- pt_error_return(regs, -res);
- goto out_tsk;
- }
-
- case PTRACE_WRITETEXT:
- case PTRACE_WRITEDATA: {
- int res = ptrace_writedata(child, (void __user *) addr2,
- addr, data);
-
- if (res == data) {
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- /* Partial write is an IO failure */
- if (res >= 0)
- res = -EIO;
- pt_error_return(regs, -res);
- goto out_tsk;
- }
-
- case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
- addr = 1;
-
- case PTRACE_CONT: { /* restart after signal. */
- if (!valid_signal(data)) {
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-
- child->exit_code = data;
-#ifdef DEBUG_PTRACE
- printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n",
- child->comm, child->pid, child->exit_code,
- child->thread.kregs->pc,
- child->thread.kregs->npc);
-#endif
- wake_up_process(child);
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
-/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL: {
- if (child->exit_state == EXIT_ZOMBIE) { /* already dead */
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- wake_up_process(child);
- child->exit_code = SIGKILL;
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- case PTRACE_SUNDETACH: { /* detach a process that was attached. */
- int err = ptrace_detach(child, data);
- if (err) {
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- /* PTRACE_DUMPCORE unsupported... */
-
- default: {
- int err = ptrace_request(child, request, addr, data);
- if (err)
- pt_error_return(regs, -err);
- else
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- }
-out_tsk:
- if (child)
- put_task_struct(child);
-out:
- unlock_kernel();
-}
-
-asmlinkage void syscall_trace(void)
-{
-#ifdef DEBUG_PTRACE
- printk("%s [%d]: syscall_trace\n", current->comm, current->pid);
-#endif
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
- if (!(current->ptrace & PT_PTRACED))
- return;
- current->thread.flags ^= MAGIC_CONSTANT;
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
-#ifdef DEBUG_PTRACE
- printk("%s [%d]: syscall_trace exit= %x\n", current->comm,
- current->pid, current->exit_code);
-#endif
- if (current->exit_code) {
- send_sig (current->exit_code, current, 1);
- current->exit_code = 0;
- }
-}
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