trap.c (1aa77e716c6f2332f2d4664f747ff4eba731825b) trap.c (36ef159f4408b08eae7f2af6d62bedd3f4343758)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
5
6#include <linux/mm.h>
7#include <linux/sched/signal.h>
8#include <linux/hardirq.h>

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82 } else if (fault & VM_FAULT_SIGSEGV) {
83 goto out;
84 } else if (fault & VM_FAULT_SIGBUS) {
85 err = -EACCES;
86 goto out;
87 }
88 BUG();
89 }
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
5
6#include <linux/mm.h>
7#include <linux/sched/signal.h>
8#include <linux/hardirq.h>

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82 } else if (fault & VM_FAULT_SIGSEGV) {
83 goto out;
84 } else if (fault & VM_FAULT_SIGBUS) {
85 err = -EACCES;
86 goto out;
87 }
88 BUG();
89 }
90 if (flags & FAULT_FLAG_ALLOW_RETRY) {
91 if (fault & VM_FAULT_RETRY) {
92 flags |= FAULT_FLAG_TRIED;
90 if (fault & VM_FAULT_RETRY) {
91 flags |= FAULT_FLAG_TRIED;
93
92
94 goto retry;
95 }
93 goto retry;
96 }
97
98 pmd = pmd_off(mm, address);
99 pte = pte_offset_kernel(pmd, address);
100 } while (!pte_present(*pte));
101 err = 0;
102 /*
103 * The below warning was added in place of

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122 * (which will retry the fault, or kill us if we got oom-killed).
123 */
124 mmap_read_unlock(mm);
125 if (!is_user)
126 goto out_nosemaphore;
127 pagefault_out_of_memory();
128 return 0;
129}
94 }
95
96 pmd = pmd_off(mm, address);
97 pte = pte_offset_kernel(pmd, address);
98 } while (!pte_present(*pte));
99 err = 0;
100 /*
101 * The below warning was added in place of

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120 * (which will retry the fault, or kill us if we got oom-killed).
121 */
122 mmap_read_unlock(mm);
123 if (!is_user)
124 goto out_nosemaphore;
125 pagefault_out_of_memory();
126 return 0;
127}
128EXPORT_SYMBOL(handle_page_fault);
130
131static void show_segv_info(struct uml_pt_regs *regs)
132{
133 struct task_struct *tsk = current;
134 struct faultinfo *fi = UPT_FAULTINFO(regs);
135
136 if (!unhandled_signal(tsk, SIGSEGV))
137 return;

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130static void show_segv_info(struct uml_pt_regs *regs)
131{
132 struct task_struct *tsk = current;
133 struct faultinfo *fi = UPT_FAULTINFO(regs);
134
135 if (!unhandled_signal(tsk, SIGSEGV))
136 return;

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