* binaries.
*/
#include <linux/compiler.h>
+#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/user.h>
#include <linux/security.h>
-#include <linux/signal.h>
#include <asm/cpu.h>
+#include <asm/dsp.h>
#include <asm/fpu.h>
#include <asm/mipsregs.h>
+#include <asm/mipsmtregs.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
* Tracing a 32-bit process with a 64-bit strace and vice versa will not
* work. I don't know how to fix this.
*/
-asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+ compat_ulong_t caddr, compat_ulong_t cdata)
{
- struct task_struct *child;
+ int addr = caddr;
+ int data = cdata;
int ret;
-#if 0
- printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
- (int) request, (int) pid, (unsigned long) addr,
- (unsigned long) data);
-#endif
- lock_kernel();
- ret = -EPERM;
- if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED)
- goto out;
- if ((ret = security_ptrace(current->parent, current)))
- goto out;
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
- ret = 0;
- goto out;
- }
- ret = -ESRCH;
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child)
- goto out;
-
- ret = -EPERM;
- if (pid == 1) /* you may not mess with init */
- goto out_tsk;
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- goto out_tsk;
-
switch (request) {
- /* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA: {
- unsigned int tmp;
+
+ /*
+ * Read 4 bytes of the other process' storage
+ * data is a pointer specifying where the user wants the
+ * 4 bytes copied into
+ * addr is a pointer in the user's storage that contains an 8 byte
+ * address in the other process of the 4 bytes that is to be read
+ * (this is run in a 32-bit process looking at a 64-bit process)
+ * when I and D space are separate, these will need to be fixed.
+ */
+ case PTRACE_PEEKTEXT_3264:
+ case PTRACE_PEEKDATA_3264: {
+ u32 tmp;
int copied;
+ u32 __user * addrOthers;
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
ret = -EIO;
+
+ /* Get the addr in the other process that we want to read */
+ if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
+ break;
+
+ copied = access_process_vm(child, (u64)addrOthers, &tmp,
+ sizeof(tmp), 0);
if (copied != sizeof(tmp))
break;
- ret = put_user(tmp, (unsigned int *) (unsigned long) data);
+ ret = put_user(tmp, (u32 __user *) (unsigned long) data);
break;
}
struct pt_regs *regs;
unsigned int tmp;
- regs = (struct pt_regs *) ((unsigned long) child->thread_info +
- THREAD_SIZE - 32 - sizeof(struct pt_regs));
+ regs = task_pt_regs(child);
ret = 0; /* Default return value. */
switch (addr) {
tmp = regs->lo;
break;
case FPC_CSR:
- if (cpu_has_fpu)
- tmp = child->thread.fpu.hard.fcr31;
- else
- tmp = child->thread.fpu.soft.fcr31;
+ tmp = child->thread.fpu.fcr31;
break;
case FPC_EIR: { /* implementation / version register */
unsigned int flags;
+#ifdef CONFIG_MIPS_MT_SMTC
+ unsigned int irqflags;
+ unsigned int mtflags;
+#endif /* CONFIG_MIPS_MT_SMTC */
- if (!cpu_has_fpu)
+ preempt_disable();
+ if (!cpu_has_fpu) {
+ preempt_enable();
+ tmp = 0;
break;
+ }
+
+#ifdef CONFIG_MIPS_MT_SMTC
+ /* Read-modify-write of Status must be atomic */
+ local_irq_save(irqflags);
+ mtflags = dmt();
+#endif /* CONFIG_MIPS_MT_SMTC */
+
+ if (cpu_has_mipsmt) {
+ unsigned int vpflags = dvpe();
+ flags = read_c0_status();
+ __enable_fpu();
+ __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
+ write_c0_status(flags);
+ evpe(vpflags);
+ } else {
+ flags = read_c0_status();
+ __enable_fpu();
+ __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
+ write_c0_status(flags);
+ }
+#ifdef CONFIG_MIPS_MT_SMTC
+ emt(mtflags);
+ local_irq_restore(irqflags);
+#endif /* CONFIG_MIPS_MT_SMTC */
+ preempt_enable();
+ break;
+ }
+ case DSP_BASE ... DSP_BASE + 5: {
+ dspreg_t *dregs;
- flags = read_c0_status();
- __enable_fpu();
- __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
- write_c0_status(flags);
+ if (!cpu_has_dsp) {
+ tmp = 0;
+ ret = -EIO;
+ goto out;
+ }
+ dregs = __get_dsp_regs(child);
+ tmp = (unsigned long) (dregs[addr - DSP_BASE]);
break;
}
+ case DSP_CONTROL:
+ if (!cpu_has_dsp) {
+ tmp = 0;
+ ret = -EIO;
+ goto out;
+ }
+ tmp = child->thread.dsp.dspcontrol;
+ break;
default:
tmp = 0;
ret = -EIO;
- goto out_tsk;
+ goto out;
}
- ret = put_user(tmp, (unsigned *) (unsigned long) data);
+ ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
break;
}
- /* when I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA:
+ /*
+ * Write 4 bytes into the other process' storage
+ * data is the 4 bytes that the user wants written
+ * addr is a pointer in the user's storage that contains an
+ * 8 byte address in the other process where the 4 bytes
+ * that is to be written
+ * (this is run in a 32-bit process looking at a 64-bit process)
+ * when I and D space are separate, these will need to be fixed.
+ */
+ case PTRACE_POKETEXT_3264:
+ case PTRACE_POKEDATA_3264: {
+ u32 __user * addrOthers;
+
+ /* Get the addr in the other process that we want to write into */
+ ret = -EIO;
+ if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
+ break;
ret = 0;
- if (access_process_vm(child, addr, &data, sizeof(data), 1)
- == sizeof(data))
+ if (access_process_vm(child, (u64)addrOthers, &data,
+ sizeof(data), 1) == sizeof(data))
break;
ret = -EIO;
break;
+ }
case PTRACE_POKEUSR: {
struct pt_regs *regs;
ret = 0;
- regs = (struct pt_regs *) ((unsigned long) child->thread_info +
- THREAD_SIZE - 32 - sizeof(struct pt_regs));
+ regs = task_pt_regs(child);
switch (addr) {
case 0 ... 31:
if (!tsk_used_math(child)) {
/* FP not yet used */
- memset(&child->thread.fpu.hard, ~0,
- sizeof(child->thread.fpu.hard));
- child->thread.fpu.hard.fcr31 = 0;
+ memset(&child->thread.fpu, ~0,
+ sizeof(child->thread.fpu));
+ child->thread.fpu.fcr31 = 0;
}
/*
* The odd registers are actually the high order bits
regs->lo = data;
break;
case FPC_CSR:
- if (cpu_has_fpu)
- child->thread.fpu.hard.fcr31 = data;
- else
- child->thread.fpu.soft.fcr31 = data;
+ child->thread.fpu.fcr31 = data;
+ break;
+ case DSP_BASE ... DSP_BASE + 5: {
+ dspreg_t *dregs;
+
+ if (!cpu_has_dsp) {
+ ret = -EIO;
+ break;
+ }
+
+ dregs = __get_dsp_regs(child);
+ dregs[addr - DSP_BASE] = data;
+ break;
+ }
+ case DSP_CONTROL:
+ if (!cpu_has_dsp) {
+ ret = -EIO;
+ break;
+ }
+ child->thread.dsp.dspcontrol = data;
break;
default:
/* The rest are not allowed. */
break;
}
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- 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;
- wake_up_process(child);
- ret = 0;
+ case PTRACE_GETREGS:
+ ret = ptrace_getregs(child, (__s64 __user *) (__u64) data);
break;
- }
- /*
- * 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:
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- wake_up_process(child);
+ case PTRACE_SETREGS:
+ ret = ptrace_setregs(child, (__s64 __user *) (__u64) data);
+ break;
+
+ case PTRACE_GETFPREGS:
+ ret = ptrace_getfpregs(child, (__u32 __user *) (__u64) data);
+ break;
+
+ case PTRACE_SETFPREGS:
+ ret = ptrace_setfpregs(child, (__u32 __user *) (__u64) data);
break;
- case PTRACE_DETACH: /* detach a process that was attached. */
- ret = ptrace_detach(child, data);
+ case PTRACE_GET_THREAD_AREA:
+ ret = put_user(task_thread_info(child)->tp_value,
+ (unsigned int __user *) (unsigned long) data);
+ break;
+
+ case PTRACE_GET_THREAD_AREA_3264:
+ ret = put_user(task_thread_info(child)->tp_value,
+ (unsigned long __user *) (unsigned long) data);
+ break;
+
+ case PTRACE_GET_WATCH_REGS:
+ ret = ptrace_get_watch_regs(child,
+ (struct pt_watch_regs __user *) (unsigned long) addr);
+ break;
+
+ case PTRACE_SET_WATCH_REGS:
+ ret = ptrace_set_watch_regs(child,
+ (struct pt_watch_regs __user *) (unsigned long) addr);
break;
default:
- ret = ptrace_request(child, request, addr, data);
+ ret = compat_ptrace_request(child, request, addr, data);
break;
}
-
-out_tsk:
- put_task_struct(child);
out:
- unlock_kernel();
return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff