[SPARC]: Move over to arch_ptrace().
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
@ -26,215 +26,6 @@
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#define MAGIC_CONSTANT 0x80000000
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/* Returning from ptrace is a bit tricky because the syscall return
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* low level code assumes any value returned which is negative and
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* is a valid errno will mean setting the condition codes to indicate
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* an error return. This doesn't work, so we have this hook.
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*/
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static inline void pt_error_return(struct pt_regs *regs, unsigned long error)
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{
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regs->u_regs[UREG_I0] = error;
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regs->psr |= PSR_C;
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regs->pc = regs->npc;
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regs->npc += 4;
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}
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static inline void pt_succ_return(struct pt_regs *regs, unsigned long value)
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{
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regs->u_regs[UREG_I0] = value;
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regs->psr &= ~PSR_C;
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regs->pc = regs->npc;
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regs->npc += 4;
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}
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static void
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pt_succ_return_linux(struct pt_regs *regs, unsigned long value, long __user *addr)
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{
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if (put_user(value, addr)) {
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pt_error_return(regs, EFAULT);
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return;
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}
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regs->u_regs[UREG_I0] = 0;
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regs->psr &= ~PSR_C;
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regs->pc = regs->npc;
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regs->npc += 4;
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}
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static void
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pt_os_succ_return (struct pt_regs *regs, unsigned long val, long __user *addr)
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{
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if (current->personality == PER_SUNOS)
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pt_succ_return (regs, val);
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else
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pt_succ_return_linux (regs, val, addr);
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}
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/* Fuck me gently with a chainsaw... */
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static inline void read_sunos_user(struct pt_regs *regs, unsigned long offset,
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struct task_struct *tsk, long __user *addr)
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{
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struct pt_regs *cregs = tsk->thread.kregs;
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struct thread_info *t = task_thread_info(tsk);
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int v;
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if(offset >= 1024)
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offset -= 1024; /* whee... */
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if(offset & ((sizeof(unsigned long) - 1))) {
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pt_error_return(regs, EIO);
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return;
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}
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if(offset >= 16 && offset < 784) {
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offset -= 16; offset >>= 2;
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pt_os_succ_return(regs, *(((unsigned long *)(&t->reg_window[0]))+offset), addr);
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return;
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}
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if(offset >= 784 && offset < 832) {
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offset -= 784; offset >>= 2;
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pt_os_succ_return(regs, *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset), addr);
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return;
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}
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switch(offset) {
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case 0:
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v = t->ksp;
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break;
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case 4:
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v = t->kpc;
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break;
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case 8:
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v = t->kpsr;
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break;
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case 12:
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v = t->uwinmask;
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break;
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case 832:
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v = t->w_saved;
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break;
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case 896:
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v = cregs->u_regs[UREG_I0];
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break;
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case 900:
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v = cregs->u_regs[UREG_I1];
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break;
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case 904:
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v = cregs->u_regs[UREG_I2];
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break;
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case 908:
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v = cregs->u_regs[UREG_I3];
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break;
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case 912:
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v = cregs->u_regs[UREG_I4];
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break;
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case 916:
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v = cregs->u_regs[UREG_I5];
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break;
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case 920:
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v = cregs->u_regs[UREG_I6];
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break;
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case 924:
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if(tsk->thread.flags & MAGIC_CONSTANT)
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v = cregs->u_regs[UREG_G1];
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else
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v = 0;
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break;
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case 940:
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v = cregs->u_regs[UREG_I0];
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break;
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case 944:
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v = cregs->u_regs[UREG_I1];
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break;
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case 948:
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/* Isn't binary compatibility _fun_??? */
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if(cregs->psr & PSR_C)
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v = cregs->u_regs[UREG_I0] << 24;
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else
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v = 0;
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break;
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/* Rest of them are completely unsupported. */
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default:
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printk("%s [%d]: Wants to read user offset %ld\n",
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current->comm, task_pid_nr(current), offset);
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pt_error_return(regs, EIO);
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return;
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}
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if (current->personality == PER_SUNOS)
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pt_succ_return (regs, v);
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else
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pt_succ_return_linux (regs, v, addr);
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return;
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}
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static inline void write_sunos_user(struct pt_regs *regs, unsigned long offset,
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struct task_struct *tsk)
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{
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struct pt_regs *cregs = tsk->thread.kregs;
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struct thread_info *t = task_thread_info(tsk);
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unsigned long value = regs->u_regs[UREG_I3];
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if(offset >= 1024)
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offset -= 1024; /* whee... */
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if(offset & ((sizeof(unsigned long) - 1)))
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goto failure;
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if(offset >= 16 && offset < 784) {
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offset -= 16; offset >>= 2;
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*(((unsigned long *)(&t->reg_window[0]))+offset) = value;
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goto success;
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}
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if(offset >= 784 && offset < 832) {
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offset -= 784; offset >>= 2;
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*(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset) = value;
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goto success;
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}
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switch(offset) {
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case 896:
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cregs->u_regs[UREG_I0] = value;
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break;
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case 900:
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cregs->u_regs[UREG_I1] = value;
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break;
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case 904:
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cregs->u_regs[UREG_I2] = value;
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break;
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case 908:
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cregs->u_regs[UREG_I3] = value;
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break;
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case 912:
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cregs->u_regs[UREG_I4] = value;
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break;
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case 916:
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cregs->u_regs[UREG_I5] = value;
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break;
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case 920:
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cregs->u_regs[UREG_I6] = value;
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break;
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case 924:
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cregs->u_regs[UREG_I7] = value;
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break;
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case 940:
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cregs->u_regs[UREG_I0] = value;
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break;
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case 944:
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cregs->u_regs[UREG_I1] = value;
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break;
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/* Rest of them are completely unsupported or "no-touch". */
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default:
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printk("%s [%d]: Wants to write user offset %ld\n",
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current->comm, task_pid_nr(current), offset);
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goto failure;
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}
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success:
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pt_succ_return(regs, 0);
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return;
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failure:
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pt_error_return(regs, EIO);
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return;
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}
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/* #define ALLOW_INIT_TRACING */
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/*
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@ -528,113 +319,42 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
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return &user_sparc32_view;
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}
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asmlinkage void do_ptrace(struct pt_regs *regs)
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long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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{
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unsigned long request = regs->u_regs[UREG_I0];
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unsigned long pid = regs->u_regs[UREG_I1];
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unsigned long addr = regs->u_regs[UREG_I2];
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unsigned long data = regs->u_regs[UREG_I3];
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unsigned long addr2 = regs->u_regs[UREG_I4];
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struct task_struct *child;
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int ret;
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lock_kernel();
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if (request == PTRACE_TRACEME) {
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ret = ptrace_traceme();
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if (ret < 0)
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pt_error_return(regs, -ret);
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else
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pt_succ_return(regs, 0);
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goto out;
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}
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child = ptrace_get_task_struct(pid);
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if (IS_ERR(child)) {
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ret = PTR_ERR(child);
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pt_error_return(regs, -ret);
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goto out;
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}
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if (request == PTRACE_ATTACH) {
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if (ptrace_attach(child)) {
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pt_error_return(regs, EPERM);
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goto out_tsk;
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}
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pt_succ_return(regs, 0);
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goto out_tsk;
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}
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ret = ptrace_check_attach(child, request == PTRACE_KILL);
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if (ret < 0) {
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pt_error_return(regs, -ret);
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goto out_tsk;
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}
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unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
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int i, ret;
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switch(request) {
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case PTRACE_PEEKTEXT: /* read word at location addr. */
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case PTRACE_PEEKDATA: {
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unsigned long tmp;
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if (access_process_vm(child, addr,
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&tmp, sizeof(tmp), 0) == sizeof(tmp))
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pt_os_succ_return(regs, tmp, (long __user *)data);
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else
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pt_error_return(regs, EIO);
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goto out_tsk;
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}
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case PTRACE_PEEKUSR:
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read_sunos_user(regs, addr, child, (long __user *) data);
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goto out_tsk;
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case PTRACE_POKEUSR:
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write_sunos_user(regs, addr, child);
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goto out_tsk;
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case PTRACE_POKETEXT: /* write the word at location addr. */
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case PTRACE_POKEDATA: {
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if (access_process_vm(child, addr,
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&data, sizeof(data), 1) == sizeof(data))
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pt_succ_return(regs, 0);
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else
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pt_error_return(regs, EIO);
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goto out_tsk;
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}
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case PTRACE_GETREGS: {
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struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
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struct pt_regs *cregs = child->thread.kregs;
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int rval;
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if (!access_ok(VERIFY_WRITE, pregs, sizeof(struct pt_regs))) {
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rval = -EFAULT;
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pt_error_return(regs, -rval);
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goto out_tsk;
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}
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ret = -EFAULT;
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if (!access_ok(VERIFY_WRITE, pregs, sizeof(struct pt_regs)))
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break;
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__put_user(cregs->psr, (&pregs->psr));
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__put_user(cregs->pc, (&pregs->pc));
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__put_user(cregs->npc, (&pregs->npc));
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__put_user(cregs->y, (&pregs->y));
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for(rval = 1; rval < 16; rval++)
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__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]));
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pt_succ_return(regs, 0);
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goto out_tsk;
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for (i = 1; i < 16; i++)
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__put_user(cregs->u_regs[i], &pregs->u_regs[i - 1]);
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ret = 0;
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break;
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}
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case PTRACE_SETREGS: {
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struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
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struct pt_regs *cregs = child->thread.kregs;
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unsigned long psr, pc, npc, y;
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int i;
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/* Must be careful, tracing process can only set certain
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* bits in the psr.
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*/
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if (!access_ok(VERIFY_READ, pregs, sizeof(struct pt_regs))) {
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pt_error_return(regs, EFAULT);
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goto out_tsk;
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}
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ret = -EFAULT;
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if (!access_ok(VERIFY_READ, pregs, sizeof(struct pt_regs)))
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break;
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__get_user(psr, (&pregs->psr));
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__get_user(pc, (&pregs->pc));
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__get_user(npc, (&pregs->npc));
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@ -647,10 +367,10 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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cregs->npc =npc;
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}
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cregs->y = y;
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for(i = 1; i < 16; i++)
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__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]));
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pt_succ_return(regs, 0);
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goto out_tsk;
|
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for (i = 1; i < 16; i++)
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__get_user(cregs->u_regs[i], &pregs->u_regs[i-1]);
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ret = 0;
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break;
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}
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case PTRACE_GETFPREGS: {
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@ -666,26 +386,25 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
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} fpq[16];
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};
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struct fps __user *fps = (struct fps __user *) addr;
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int i;
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|
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if (!access_ok(VERIFY_WRITE, fps, sizeof(struct fps))) {
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i = -EFAULT;
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pt_error_return(regs, -i);
|
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goto out_tsk;
|
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}
|
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for(i = 0; i < 32; i++)
|
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__put_user(child->thread.float_regs[i], (&fps->regs[i]));
|
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ret = -EFAULT;
|
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if (!access_ok(VERIFY_WRITE, fps, sizeof(struct fps)))
|
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break;
|
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|
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for (i = 0; i < 32; i++)
|
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__put_user(child->thread.float_regs[i], &fps->regs[i]);
|
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__put_user(child->thread.fsr, (&fps->fsr));
|
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__put_user(child->thread.fpqdepth, (&fps->fpqd));
|
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__put_user(0, (&fps->flags));
|
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__put_user(0, (&fps->extra));
|
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for(i = 0; i < 16; i++) {
|
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for (i = 0; i < 16; i++) {
|
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__put_user(child->thread.fpqueue[i].insn_addr,
|
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(&fps->fpq[i].insnaddr));
|
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__put_user(child->thread.fpqueue[i].insn, (&fps->fpq[i].insn));
|
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__put_user(child->thread.fpqueue[i].insn,
|
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&fps->fpq[i].insn);
|
||||
}
|
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pt_succ_return(regs, 0);
|
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goto out_tsk;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case PTRACE_SETFPREGS: {
|
||||
@ -701,107 +420,53 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
|
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} 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)));
|
||||
ret = -EFAULT;
|
||||
if (!access_ok(VERIFY_READ, fps, sizeof(struct fps)))
|
||||
break;
|
||||
|
||||
copy_from_user(&child->thread.float_regs[0], &fps->regs[0],
|
||||
(32 * sizeof(unsigned long)));
|
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__get_user(child->thread.fsr, (&fps->fsr));
|
||||
__get_user(child->thread.fpqdepth, (&fps->fpqd));
|
||||
for(i = 0; i < 16; i++) {
|
||||
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));
|
||||
__get_user(child->thread.fpqueue[i].insn,
|
||||
&fps->fpq[i].insn);
|
||||
}
|
||||
pt_succ_return(regs, 0);
|
||||
goto out_tsk;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case PTRACE_READTEXT:
|
||||
case PTRACE_READDATA: {
|
||||
int res = ptrace_readdata(child, addr,
|
||||
(void __user *) addr2, data);
|
||||
case PTRACE_READDATA:
|
||||
ret = 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;
|
||||
}
|
||||
if (ret == data)
|
||||
ret = 0;
|
||||
else if (ret >= 0)
|
||||
ret = -EIO;
|
||||
break;
|
||||
|
||||
case PTRACE_WRITETEXT:
|
||||
case PTRACE_WRITEDATA: {
|
||||
int res = ptrace_writedata(child, (void __user *) addr2,
|
||||
addr, data);
|
||||
case PTRACE_WRITEDATA:
|
||||
ret = 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;
|
||||
if (ret == data)
|
||||
ret = 0;
|
||||
else if (ret >= 0)
|
||||
ret = -EIO;
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = ptrace_request(child, request, addr, data);
|
||||
break;
|
||||
}
|
||||
|
||||
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;
|
||||
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;
|
||||
}
|
||||
|
||||
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();
|
||||
return ret;
|
||||
}
|
||||
|
||||
asmlinkage void syscall_trace(void)
|
||||
@ -810,7 +475,6 @@ asmlinkage void syscall_trace(void)
|
||||
return;
|
||||
if (!(current->ptrace & PT_PTRACED))
|
||||
return;
|
||||
current->thread.flags ^= MAGIC_CONSTANT;
|
||||
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
|
||||
? 0x80 : 0));
|
||||
/*
|
||||
|
||||
Reference in New Issue
Block a user