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Auto merge with /home/aegl/GIT/ia64-test

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This commit is contained in:
Tony Luck
2005-06-28 08:24:49 -07:00
parent 99f95e5286 f2cbb4f019
commit 54522b6613
6 changed files with 308 additions and 233 deletions
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22
arch/ia64/kernel/ptrace.c
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@@ -725,12 +725,32 @@ convert_to_non_syscall (struct task_struct *child, struct pt_regs *pt,
break;
}
/*
* Note: at the time of this call, the target task is blocked
* in notify_resume_user() and by clearling PRED_LEAVE_SYSCALL
* (aka, "pLvSys") we redirect execution from
* .work_pending_syscall_end to .work_processed_kernel.
*/
unw_get_pr(&prev_info, &pr);
pr &= ~(1UL << PRED_SYSCALL);
pr &= ~((1UL << PRED_SYSCALL) | (1UL << PRED_LEAVE_SYSCALL));
pr |= (1UL << PRED_NON_SYSCALL);
unw_set_pr(&prev_info, pr);
pt->cr_ifs = (1UL << 63) | cfm;
/*
* Clear the memory that is NOT written on syscall-entry to
* ensure we do not leak kernel-state to user when execution
* resumes.
*/
pt->r2 = 0;
pt->r3 = 0;
pt->r14 = 0;
memset(&pt->r16, 0, 16*8); /* clear r16-r31 */
memset(&pt->f6, 0, 6*16); /* clear f6-f11 */
pt->b7 = 0;
pt->ar_ccv = 0;
pt->ar_csd = 0;
pt->ar_ssd = 0;
}
static int