#include <linux/user.h>
#include <linux/slab.h>
#include <linux/security.h>
+#include <linux/signal.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
REG_R0 = 0, REG_F0 = 32, REG_FPCR = 63, REG_PC = 64
};
+#define PT_REG(reg) \
+ (PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
+
+#define SW_REG(reg) \
+ (PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
+ + offsetof(struct switch_stack, reg))
+
static int regoff[] = {
PT_REG( r0), PT_REG( r1), PT_REG( r2), PT_REG( r3),
PT_REG( r4), PT_REG( r5), PT_REG( r6), PT_REG( r7),
PT_REG( pc)
};
-static long zero;
+static unsigned long zero;
/*
* Get address of register REGNO in task TASK.
*/
-static long *
+static unsigned long *
get_reg_addr(struct task_struct * task, unsigned long regno)
{
- long *addr;
+ unsigned long *addr;
if (regno == 30) {
- addr = &task->thread_info->pcb.usp;
+ addr = &task_thread_info(task)->pcb.usp;
} else if (regno == 65) {
- addr = &task->thread_info->pcb.unique;
+ addr = &task_thread_info(task)->pcb.unique;
} else if (regno == 31 || regno > 65) {
zero = 0;
addr = &zero;
} else {
- addr = (long *)((long)task->thread_info + regoff[regno]);
+ addr = task_stack_page(task) + regoff[regno];
}
return addr;
}
/*
* Get contents of register REGNO in task TASK.
*/
-static long
+static unsigned long
get_reg(struct task_struct * task, unsigned long regno)
{
/* Special hack for fpcr -- combine hardware and software bits. */
if (regno == 63) {
unsigned long fpcr = *get_reg_addr(task, regno);
unsigned long swcr
- = task->thread_info->ieee_state & IEEE_SW_MASK;
+ = task_thread_info(task)->ieee_state & IEEE_SW_MASK;
swcr = swcr_update_status(swcr, fpcr);
return fpcr | swcr;
}
* Write contents of register REGNO in task TASK.
*/
static int
-put_reg(struct task_struct *task, unsigned long regno, long data)
+put_reg(struct task_struct *task, unsigned long regno, unsigned long data)
{
if (regno == 63) {
- task->thread_info->ieee_state
- = ((task->thread_info->ieee_state & ~IEEE_SW_MASK)
+ task_thread_info(task)->ieee_state
+ = ((task_thread_info(task)->ieee_state & ~IEEE_SW_MASK)
| (data & IEEE_SW_MASK));
data = (data & FPCR_DYN_MASK) | ieee_swcr_to_fpcr(data);
}
ptrace_set_bpt(struct task_struct * child)
{
int displ, i, res, reg_b, nsaved = 0;
- u32 insn, op_code;
+ unsigned int insn, op_code;
unsigned long pc;
pc = get_reg(child, REG_PC);
- res = read_int(child, pc, &insn);
+ res = read_int(child, pc, (int *) &insn);
if (res < 0)
return res;
* branch (emulation can be tricky for fp branches).
*/
displ = ((s32)(insn << 11)) >> 9;
- child->thread_info->bpt_addr[nsaved++] = pc + 4;
+ task_thread_info(child)->bpt_addr[nsaved++] = pc + 4;
if (displ) /* guard against unoptimized code */
- child->thread_info->bpt_addr[nsaved++]
+ task_thread_info(child)->bpt_addr[nsaved++]
= pc + 4 + displ;
DBG(DBG_BPT, ("execing branch\n"));
} else if (op_code == 0x1a) {
reg_b = (insn >> 16) & 0x1f;
- child->thread_info->bpt_addr[nsaved++] = get_reg(child, reg_b);
+ task_thread_info(child)->bpt_addr[nsaved++] = get_reg(child, reg_b);
DBG(DBG_BPT, ("execing jump\n"));
} else {
- child->thread_info->bpt_addr[nsaved++] = pc + 4;
+ task_thread_info(child)->bpt_addr[nsaved++] = pc + 4;
DBG(DBG_BPT, ("execing normal insn\n"));
}
/* install breakpoints: */
for (i = 0; i < nsaved; ++i) {
- res = read_int(child, child->thread_info->bpt_addr[i], &insn);
+ res = read_int(child, task_thread_info(child)->bpt_addr[i],
+ (int *) &insn);
if (res < 0)
return res;
- child->thread_info->bpt_insn[i] = insn;
+ task_thread_info(child)->bpt_insn[i] = insn;
DBG(DBG_BPT, (" -> next_pc=%lx\n",
- child->thread_info->bpt_addr[i]));
- res = write_int(child, child->thread_info->bpt_addr[i],
+ task_thread_info(child)->bpt_addr[i]));
+ res = write_int(child, task_thread_info(child)->bpt_addr[i],
BREAKINST);
if (res < 0)
return res;
}
- child->thread_info->bpt_nsaved = nsaved;
+ task_thread_info(child)->bpt_nsaved = nsaved;
return 0;
}
int
ptrace_cancel_bpt(struct task_struct * child)
{
- int i, nsaved = child->thread_info->bpt_nsaved;
+ int i, nsaved = task_thread_info(child)->bpt_nsaved;
- child->thread_info->bpt_nsaved = 0;
+ task_thread_info(child)->bpt_nsaved = 0;
if (nsaved > 2) {
printk("ptrace_cancel_bpt: bogus nsaved: %d!\n", nsaved);
}
for (i = 0; i < nsaved; ++i) {
- write_int(child, child->thread_info->bpt_addr[i],
- child->thread_info->bpt_insn[i]);
+ write_int(child, task_thread_info(child)->bpt_addr[i],
+ task_thread_info(child)->bpt_insn[i]);
}
return (nsaved != 0);
}
lock_kernel();
DBG(DBG_MEM, ("request=%ld pid=%ld addr=0x%lx data=0x%lx\n",
request, pid, addr, data));
- ret = -EPERM;
if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED)
- goto out_notsk;
- ret = security_ptrace(current->parent, current);
- if (ret)
- goto out_notsk;
- /* set the ptrace bit in the process ptrace flags. */
- current->ptrace |= PT_PTRACED;
- ret = 0;
+ ret = ptrace_traceme();
goto out_notsk;
}
- if (pid == 1) /* you may not mess with init */
- goto out_notsk;
- ret = -ESRCH;
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child)
+ child = ptrace_get_task_struct(pid);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
goto out_notsk;
+ }
+
+ if (!vx_check(vx_task_xid(child), VX_WATCH|VX_IDENT)) {
+ ret = -EPERM;
+ goto out;
+ }
if (request == PTRACE_ATTACH) {
ret = ptrace_attach(child);
/* continue and stop at next (return from) syscall */
case PTRACE_CONT: /* restart after signal. */
ret = -EIO;
- if ((unsigned long) data > _NSIG)
+ if (!valid_signal(data))
break;
if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
*/
case PTRACE_KILL:
ret = 0;
- if (child->state == TASK_ZOMBIE)
+ if (child->exit_state == EXIT_ZOMBIE)
break;
child->exit_code = SIGKILL;
/* make sure single-step breakpoint is gone. */
case PTRACE_SINGLESTEP: /* execute single instruction. */
ret = -EIO;
- if ((unsigned long) data > _NSIG)
+ if (!valid_signal(data))
break;
/* Mark single stepping. */
- child->thread_info->bpt_nsaved = -1;
+ task_thread_info(child)->bpt_nsaved = -1;
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
wake_up_process(child);
git://git.onelab.eu / linux-2.6.git / blobdiff