From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/binfmt_elf_fdpic.c | 443 +++++++++++++++++++------------------------------------
1 files changed, 152 insertions(+), 291 deletions(-)
diff --git a/kernel/fs/binfmt_elf_fdpic.c b/kernel/fs/binfmt_elf_fdpic.c
index b53bb37..f4f146f 100644
--- a/kernel/fs/binfmt_elf_fdpic.c
+++ b/kernel/fs/binfmt_elf_fdpic.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* binfmt_elf_fdpic.c: FDPIC ELF binary format
*
* Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
* Derived from binfmt_elf.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
@@ -39,10 +35,10 @@
#include <linux/elfcore.h>
#include <linux/coredump.h>
#include <linux/dax.h>
+#include <linux/regset.h>
#include <linux/uaccess.h>
#include <asm/param.h>
-#include <asm/pgalloc.h>
typedef char *elf_caddr_t;
@@ -342,17 +338,16 @@
interp_params.flags |= ELF_FDPIC_FLAG_CONSTDISP;
/* flush all traces of the currently running executable */
- retval = flush_old_exec(bprm);
+ retval = begin_new_exec(bprm);
if (retval)
goto error;
/* there's now no turning back... the old userspace image is dead,
* defunct, deceased, etc.
*/
+ SET_PERSONALITY(exec_params.hdr);
if (elf_check_fdpic(&exec_params.hdr))
- set_personality(PER_LINUX_FDPIC);
- else
- set_personality(PER_LINUX);
+ current->personality |= PER_LINUX_FDPIC;
if (elf_read_implies_exec(&exec_params.hdr, executable_stack))
current->personality |= READ_IMPLIES_EXEC;
@@ -438,9 +433,9 @@
current->mm->start_stack = current->mm->start_brk + stack_size;
#endif
- install_exec_creds(bprm);
- if (create_elf_fdpic_tables(bprm, current->mm,
- &exec_params, &interp_params) < 0)
+ retval = create_elf_fdpic_tables(bprm, current->mm, &exec_params,
+ &interp_params);
+ if (retval < 0)
goto error;
kdebug("- start_code %lx", current->mm->start_code);
@@ -541,7 +536,7 @@
platform_len = strlen(k_platform) + 1;
sp -= platform_len;
u_platform = (char __user *) sp;
- if (__copy_to_user(u_platform, k_platform, platform_len) != 0)
+ if (copy_to_user(u_platform, k_platform, platform_len) != 0)
return -EFAULT;
}
@@ -556,7 +551,7 @@
platform_len = strlen(k_base_platform) + 1;
sp -= platform_len;
u_base_platform = (char __user *) sp;
- if (__copy_to_user(u_base_platform, k_base_platform, platform_len) != 0)
+ if (copy_to_user(u_base_platform, k_base_platform, platform_len) != 0)
return -EFAULT;
}
@@ -593,7 +588,7 @@
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) +
(k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH;
- if (bprm->interp_flags & BINPRM_FLAGS_EXECFD)
+ if (bprm->have_execfd)
nitems++;
csp = sp;
@@ -608,11 +603,13 @@
/* put the ELF interpreter info on the stack */
#define NEW_AUX_ENT(id, val) \
do { \
- struct { unsigned long _id, _val; } __user *ent; \
+ struct { unsigned long _id, _val; } __user *ent, v; \
\
ent = (void __user *) csp; \
- __put_user((id), &ent[nr]._id); \
- __put_user((val), &ent[nr]._val); \
+ v._id = (id); \
+ v._val = (val); \
+ if (copy_to_user(ent + nr, &v, sizeof(v))) \
+ return -EFAULT; \
nr++; \
} while (0)
@@ -633,10 +630,10 @@
(elf_addr_t) (unsigned long) u_base_platform);
}
- if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
+ if (bprm->have_execfd) {
nr = 0;
csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
+ NEW_AUX_ENT(AT_EXECFD, bprm->execfd);
}
nr = 0;
@@ -679,7 +676,8 @@
/* stack argc */
csp -= sizeof(unsigned long);
- __put_user(bprm->argc, (unsigned long __user *) csp);
+ if (put_user(bprm->argc, (unsigned long __user *) csp))
+ return -EFAULT;
BUG_ON(csp != sp);
@@ -693,25 +691,29 @@
p = (char __user *) current->mm->arg_start;
for (loop = bprm->argc; loop > 0; loop--) {
- __put_user((elf_caddr_t) p, argv++);
+ if (put_user((elf_caddr_t) p, argv++))
+ return -EFAULT;
len = strnlen_user(p, MAX_ARG_STRLEN);
if (!len || len > MAX_ARG_STRLEN)
return -EINVAL;
p += len;
}
- __put_user(NULL, argv);
+ if (put_user(NULL, argv))
+ return -EFAULT;
current->mm->arg_end = (unsigned long) p;
/* fill in the envv[] array */
current->mm->env_start = (unsigned long) p;
for (loop = bprm->envc; loop > 0; loop--) {
- __put_user((elf_caddr_t)(unsigned long) p, envp++);
+ if (put_user((elf_caddr_t)(unsigned long) p, envp++))
+ return -EFAULT;
len = strnlen_user(p, MAX_ARG_STRLEN);
if (!len || len > MAX_ARG_STRLEN)
return -EINVAL;
p += len;
}
- __put_user(NULL, envp);
+ if (put_user(NULL, envp))
+ return -EFAULT;
current->mm->env_end = (unsigned long) p;
mm->start_stack = (unsigned long) sp;
@@ -853,8 +855,8 @@
tmp = phdr->p_memsz / sizeof(Elf32_Dyn);
dyn = (Elf32_Dyn __user *)params->dynamic_addr;
- __get_user(d_tag, &dyn[tmp - 1].d_tag);
- if (d_tag != 0)
+ if (get_user(d_tag, &dyn[tmp - 1].d_tag) ||
+ d_tag != 0)
goto dynamic_error;
break;
}
@@ -1187,75 +1189,31 @@
*/
#ifdef CONFIG_ELF_CORE
-/*
- * Decide whether a segment is worth dumping; default is yes to be
- * sure (missing info is worse than too much; etc).
- * Personally I'd include everything, and use the coredump limit...
- *
- * I think we should skip something. But I am not sure how. H.J.
- */
-static int maydump(struct vm_area_struct *vma, unsigned long mm_flags)
+struct elf_prstatus_fdpic
{
- int dump_ok;
-
- /* Do not dump I/O mapped devices or special mappings */
- if (vma->vm_flags & VM_IO) {
- kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags);
- return 0;
- }
-
- /* If we may not read the contents, don't allow us to dump
- * them either. "dump_write()" can't handle it anyway.
+ struct elf_siginfo pr_info; /* Info associated with signal */
+ short pr_cursig; /* Current signal */
+ unsigned long pr_sigpend; /* Set of pending signals */
+ unsigned long pr_sighold; /* Set of held signals */
+ pid_t pr_pid;
+ pid_t pr_ppid;
+ pid_t pr_pgrp;
+ pid_t pr_sid;
+ struct __kernel_old_timeval pr_utime; /* User time */
+ struct __kernel_old_timeval pr_stime; /* System time */
+ struct __kernel_old_timeval pr_cutime; /* Cumulative user time */
+ struct __kernel_old_timeval pr_cstime; /* Cumulative system time */
+ elf_gregset_t pr_reg; /* GP registers */
+ /* When using FDPIC, the loadmap addresses need to be communicated
+ * to GDB in order for GDB to do the necessary relocations. The
+ * fields (below) used to communicate this information are placed
+ * immediately after ``pr_reg'', so that the loadmap addresses may
+ * be viewed as part of the register set if so desired.
*/
- if (!(vma->vm_flags & VM_READ)) {
- kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags);
- return 0;
- }
-
- /* support for DAX */
- if (vma_is_dax(vma)) {
- if (vma->vm_flags & VM_SHARED) {
- dump_ok = test_bit(MMF_DUMP_DAX_SHARED, &mm_flags);
- kdcore("%08lx: %08lx: %s (DAX shared)", vma->vm_start,
- vma->vm_flags, dump_ok ? "yes" : "no");
- } else {
- dump_ok = test_bit(MMF_DUMP_DAX_PRIVATE, &mm_flags);
- kdcore("%08lx: %08lx: %s (DAX private)", vma->vm_start,
- vma->vm_flags, dump_ok ? "yes" : "no");
- }
- return dump_ok;
- }
-
- /* By default, dump shared memory if mapped from an anonymous file. */
- if (vma->vm_flags & VM_SHARED) {
- if (file_inode(vma->vm_file)->i_nlink == 0) {
- dump_ok = test_bit(MMF_DUMP_ANON_SHARED, &mm_flags);
- kdcore("%08lx: %08lx: %s (share)", vma->vm_start,
- vma->vm_flags, dump_ok ? "yes" : "no");
- return dump_ok;
- }
-
- dump_ok = test_bit(MMF_DUMP_MAPPED_SHARED, &mm_flags);
- kdcore("%08lx: %08lx: %s (share)", vma->vm_start,
- vma->vm_flags, dump_ok ? "yes" : "no");
- return dump_ok;
- }
-
-#ifdef CONFIG_MMU
- /* By default, if it hasn't been written to, don't write it out */
- if (!vma->anon_vma) {
- dump_ok = test_bit(MMF_DUMP_MAPPED_PRIVATE, &mm_flags);
- kdcore("%08lx: %08lx: %s (!anon)", vma->vm_start,
- vma->vm_flags, dump_ok ? "yes" : "no");
- return dump_ok;
- }
-#endif
-
- dump_ok = test_bit(MMF_DUMP_ANON_PRIVATE, &mm_flags);
- kdcore("%08lx: %08lx: %s", vma->vm_start, vma->vm_flags,
- dump_ok ? "yes" : "no");
- return dump_ok;
-}
+ unsigned long pr_exec_fdpic_loadmap;
+ unsigned long pr_interp_fdpic_loadmap;
+ int pr_fpvalid; /* True if math co-processor being used. */
+};
/* An ELF note in memory */
struct memelfnote
@@ -1343,7 +1301,7 @@
* fill up all the fields in prstatus from the given task struct, except
* registers which need to be filled up separately.
*/
-static void fill_prstatus(struct elf_prstatus *prstatus,
+static void fill_prstatus(struct elf_prstatus_fdpic *prstatus,
struct task_struct *p, long signr)
{
prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
@@ -1363,17 +1321,17 @@
* group-wide total, not its individual thread total.
*/
thread_group_cputime(p, &cputime);
- prstatus->pr_utime = ns_to_timeval(cputime.utime);
- prstatus->pr_stime = ns_to_timeval(cputime.stime);
+ prstatus->pr_utime = ns_to_kernel_old_timeval(cputime.utime);
+ prstatus->pr_stime = ns_to_kernel_old_timeval(cputime.stime);
} else {
u64 utime, stime;
task_cputime(p, &utime, &stime);
- prstatus->pr_utime = ns_to_timeval(utime);
- prstatus->pr_stime = ns_to_timeval(stime);
+ prstatus->pr_utime = ns_to_kernel_old_timeval(utime);
+ prstatus->pr_stime = ns_to_kernel_old_timeval(stime);
}
- prstatus->pr_cutime = ns_to_timeval(p->signal->cutime);
- prstatus->pr_cstime = ns_to_timeval(p->signal->cstime);
+ prstatus->pr_cutime = ns_to_kernel_old_timeval(p->signal->cutime);
+ prstatus->pr_cstime = ns_to_kernel_old_timeval(p->signal->cstime);
prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap;
prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap;
@@ -1425,14 +1383,10 @@
/* Here is the structure in which status of each thread is captured. */
struct elf_thread_status
{
- struct list_head list;
- struct elf_prstatus prstatus; /* NT_PRSTATUS */
+ struct elf_thread_status *next;
+ struct elf_prstatus_fdpic prstatus; /* NT_PRSTATUS */
elf_fpregset_t fpu; /* NT_PRFPREG */
- struct task_struct *thread;
-#ifdef ELF_CORE_COPY_XFPREGS
- elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
-#endif
- struct memelfnote notes[3];
+ struct memelfnote notes[2];
int num_notes;
};
@@ -1441,38 +1395,44 @@
* we need to keep a linked list of every thread's pr_status and then create
* a single section for them in the final core file.
*/
-static int elf_dump_thread_status(long signr, struct elf_thread_status *t)
+static struct elf_thread_status *elf_dump_thread_status(long signr, struct task_struct *p, int *sz)
{
- struct task_struct *p = t->thread;
- int sz = 0;
+ const struct user_regset_view *view = task_user_regset_view(p);
+ struct elf_thread_status *t;
+ int i, ret;
- t->num_notes = 0;
+ t = kzalloc(sizeof(struct elf_thread_status), GFP_KERNEL);
+ if (!t)
+ return t;
fill_prstatus(&t->prstatus, p, signr);
- elf_core_copy_task_regs(p, &t->prstatus.pr_reg);
+ regset_get(p, &view->regsets[0],
+ sizeof(t->prstatus.pr_reg), &t->prstatus.pr_reg);
fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus),
&t->prstatus);
t->num_notes++;
- sz += notesize(&t->notes[0]);
+ *sz += notesize(&t->notes[0]);
- t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu);
+ for (i = 1; i < view->n; ++i) {
+ const struct user_regset *regset = &view->regsets[i];
+ if (regset->core_note_type != NT_PRFPREG)
+ continue;
+ if (regset->active && regset->active(p, regset) <= 0)
+ continue;
+ ret = regset_get(p, regset, sizeof(t->fpu), &t->fpu);
+ if (ret >= 0)
+ t->prstatus.pr_fpvalid = 1;
+ break;
+ }
+
if (t->prstatus.pr_fpvalid) {
fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu),
&t->fpu);
t->num_notes++;
- sz += notesize(&t->notes[1]);
+ *sz += notesize(&t->notes[1]);
}
-
-#ifdef ELF_CORE_COPY_XFPREGS
- if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
- fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
- sizeof(t->xfpu), &t->xfpu);
- t->num_notes++;
- sz += notesize(&t->notes[2]);
- }
-#endif
- return sz;
+ return t;
}
static void fill_extnum_info(struct elfhdr *elf, struct elf_shdr *shdr4extnum,
@@ -1494,52 +1454,19 @@
/*
* dump the segments for an MMU process
*/
-static bool elf_fdpic_dump_segments(struct coredump_params *cprm)
+static bool elf_fdpic_dump_segments(struct coredump_params *cprm,
+ struct core_vma_metadata *vma_meta,
+ int vma_count)
{
- struct vm_area_struct *vma;
+ int i;
- for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
-#ifdef CONFIG_MMU
- unsigned long addr;
-#endif
+ for (i = 0; i < vma_count; i++) {
+ struct core_vma_metadata *meta = vma_meta + i;
- if (!maydump(vma, cprm->mm_flags))
- continue;
-
-#ifdef CONFIG_MMU
- for (addr = vma->vm_start; addr < vma->vm_end;
- addr += PAGE_SIZE) {
- bool res;
- struct page *page = get_dump_page(addr);
- if (page) {
- void *kaddr = kmap(page);
- res = dump_emit(cprm, kaddr, PAGE_SIZE);
- kunmap(page);
- put_page(page);
- } else {
- res = dump_skip(cprm, PAGE_SIZE);
- }
- if (!res)
- return false;
- }
-#else
- if (!dump_emit(cprm, (void *) vma->vm_start,
- vma->vm_end - vma->vm_start))
+ if (!dump_user_range(cprm, meta->start, meta->dump_size))
return false;
-#endif
}
return true;
-}
-
-static size_t elf_core_vma_data_size(unsigned long mm_flags)
-{
- struct vm_area_struct *vma;
- size_t size = 0;
-
- for (vma = current->mm->mmap; vma; vma = vma->vm_next)
- if (maydump(vma, mm_flags))
- size += vma->vm_end - vma->vm_start;
- return size;
}
/*
@@ -1551,24 +1478,14 @@
*/
static int elf_fdpic_core_dump(struct coredump_params *cprm)
{
-#define NUM_NOTES 6
int has_dumped = 0;
- mm_segment_t fs;
- int segs;
+ int vma_count, segs;
int i;
- struct vm_area_struct *vma;
struct elfhdr *elf = NULL;
loff_t offset = 0, dataoff;
- int numnote;
- struct memelfnote *notes = NULL;
- struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */
+ struct memelfnote psinfo_note, auxv_note;
struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */
- LIST_HEAD(thread_list);
- struct list_head *t;
- elf_fpregset_t *fpu = NULL;
-#ifdef ELF_CORE_COPY_XFPREGS
- elf_fpxregset_t *xfpu = NULL;
-#endif
+ struct elf_thread_status *thread_list = NULL;
int thread_status_size = 0;
elf_addr_t *auxv;
struct elf_phdr *phdr4note = NULL;
@@ -1577,67 +1494,40 @@
elf_addr_t e_shoff;
struct core_thread *ct;
struct elf_thread_status *tmp;
-
- /*
- * We no longer stop all VM operations.
- *
- * This is because those proceses that could possibly change map_count
- * or the mmap / vma pages are now blocked in do_exit on current
- * finishing this core dump.
- *
- * Only ptrace can touch these memory addresses, but it doesn't change
- * the map_count or the pages allocated. So no possibility of crashing
- * exists while dumping the mm->vm_next areas to the core file.
- */
+ struct core_vma_metadata *vma_meta = NULL;
+ size_t vma_data_size;
/* alloc memory for large data structures: too large to be on stack */
elf = kmalloc(sizeof(*elf), GFP_KERNEL);
if (!elf)
- goto cleanup;
- prstatus = kzalloc(sizeof(*prstatus), GFP_KERNEL);
- if (!prstatus)
- goto cleanup;
+ goto end_coredump;
psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
if (!psinfo)
- goto cleanup;
- notes = kmalloc_array(NUM_NOTES, sizeof(struct memelfnote),
- GFP_KERNEL);
- if (!notes)
- goto cleanup;
- fpu = kmalloc(sizeof(*fpu), GFP_KERNEL);
- if (!fpu)
- goto cleanup;
-#ifdef ELF_CORE_COPY_XFPREGS
- xfpu = kmalloc(sizeof(*xfpu), GFP_KERNEL);
- if (!xfpu)
- goto cleanup;
-#endif
+ goto end_coredump;
+
+ if (dump_vma_snapshot(cprm, &vma_count, &vma_meta, &vma_data_size))
+ goto end_coredump;
for (ct = current->mm->core_state->dumper.next;
ct; ct = ct->next) {
- tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+ tmp = elf_dump_thread_status(cprm->siginfo->si_signo,
+ ct->task, &thread_status_size);
if (!tmp)
- goto cleanup;
+ goto end_coredump;
- tmp->thread = ct->task;
- list_add(&tmp->list, &thread_list);
- }
-
- list_for_each(t, &thread_list) {
- struct elf_thread_status *tmp;
- int sz;
-
- tmp = list_entry(t, struct elf_thread_status, list);
- sz = elf_dump_thread_status(cprm->siginfo->si_signo, tmp);
- thread_status_size += sz;
+ tmp->next = thread_list;
+ thread_list = tmp;
}
/* now collect the dump for the current */
- fill_prstatus(prstatus, current, cprm->siginfo->si_signo);
- elf_core_copy_regs(&prstatus->pr_reg, cprm->regs);
+ tmp = elf_dump_thread_status(cprm->siginfo->si_signo,
+ current, &thread_status_size);
+ if (!tmp)
+ goto end_coredump;
+ tmp->next = thread_list;
+ thread_list = tmp;
- segs = current->mm->map_count;
- segs += elf_core_extra_phdrs();
+ segs = vma_count + elf_core_extra_phdrs();
/* for notes section */
segs++;
@@ -1656,59 +1546,33 @@
* with info from their /proc.
*/
- fill_note(notes + 0, "CORE", NT_PRSTATUS, sizeof(*prstatus), prstatus);
fill_psinfo(psinfo, current->group_leader, current->mm);
- fill_note(notes + 1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
-
- numnote = 2;
+ fill_note(&psinfo_note, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
+ thread_status_size += notesize(&psinfo_note);
auxv = (elf_addr_t *) current->mm->saved_auxv;
-
i = 0;
do
i += 2;
while (auxv[i - 2] != AT_NULL);
- fill_note(¬es[numnote++], "CORE", NT_AUXV,
- i * sizeof(elf_addr_t), auxv);
+ fill_note(&auxv_note, "CORE", NT_AUXV, i * sizeof(elf_addr_t), auxv);
+ thread_status_size += notesize(&auxv_note);
- /* Try to dump the FPU. */
- if ((prstatus->pr_fpvalid =
- elf_core_copy_task_fpregs(current, cprm->regs, fpu)))
- fill_note(notes + numnote++,
- "CORE", NT_PRFPREG, sizeof(*fpu), fpu);
-#ifdef ELF_CORE_COPY_XFPREGS
- if (elf_core_copy_task_xfpregs(current, xfpu))
- fill_note(notes + numnote++,
- "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
-#endif
-
- fs = get_fs();
- set_fs(KERNEL_DS);
-
- offset += sizeof(*elf); /* Elf header */
+ offset = sizeof(*elf); /* Elf header */
offset += segs * sizeof(struct elf_phdr); /* Program headers */
/* Write notes phdr entry */
- {
- int sz = 0;
+ phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL);
+ if (!phdr4note)
+ goto end_coredump;
- for (i = 0; i < numnote; i++)
- sz += notesize(notes + i);
-
- sz += thread_status_size;
-
- phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL);
- if (!phdr4note)
- goto end_coredump;
-
- fill_elf_note_phdr(phdr4note, sz, offset);
- offset += sz;
- }
+ fill_elf_note_phdr(phdr4note, thread_status_size, offset);
+ offset += thread_status_size;
/* Page-align dumped data */
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
- offset += elf_core_vma_data_size(cprm->mm_flags);
+ offset += vma_data_size;
offset += elf_core_extra_data_size();
e_shoff = offset;
@@ -1728,23 +1592,26 @@
goto end_coredump;
/* write program headers for segments dump */
- for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
+ for (i = 0; i < vma_count; i++) {
+ struct core_vma_metadata *meta = vma_meta + i;
struct elf_phdr phdr;
size_t sz;
- sz = vma->vm_end - vma->vm_start;
+ sz = meta->end - meta->start;
phdr.p_type = PT_LOAD;
phdr.p_offset = offset;
- phdr.p_vaddr = vma->vm_start;
+ phdr.p_vaddr = meta->start;
phdr.p_paddr = 0;
- phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0;
+ phdr.p_filesz = meta->dump_size;
phdr.p_memsz = sz;
offset += phdr.p_filesz;
- phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
- if (vma->vm_flags & VM_WRITE)
+ phdr.p_flags = 0;
+ if (meta->flags & VM_READ)
+ phdr.p_flags |= PF_R;
+ if (meta->flags & VM_WRITE)
phdr.p_flags |= PF_W;
- if (vma->vm_flags & VM_EXEC)
+ if (meta->flags & VM_EXEC)
phdr.p_flags |= PF_X;
phdr.p_align = ELF_EXEC_PAGESIZE;
@@ -1756,15 +1623,18 @@
goto end_coredump;
/* write out the notes section */
- for (i = 0; i < numnote; i++)
- if (!writenote(notes + i, cprm))
+ if (!writenote(thread_list->notes, cprm))
+ goto end_coredump;
+ if (!writenote(&psinfo_note, cprm))
+ goto end_coredump;
+ if (!writenote(&auxv_note, cprm))
+ goto end_coredump;
+ for (i = 1; i < thread_list->num_notes; i++)
+ if (!writenote(thread_list->notes + i, cprm))
goto end_coredump;
/* write out the thread status notes section */
- list_for_each(t, &thread_list) {
- struct elf_thread_status *tmp =
- list_entry(t, struct elf_thread_status, list);
-
+ for (tmp = thread_list->next; tmp; tmp = tmp->next) {
for (i = 0; i < tmp->num_notes; i++)
if (!writenote(&tmp->notes[i], cprm))
goto end_coredump;
@@ -1773,7 +1643,7 @@
if (!dump_skip(cprm, dataoff - cprm->pos))
goto end_coredump;
- if (!elf_fdpic_dump_segments(cprm))
+ if (!elf_fdpic_dump_segments(cprm, vma_meta, vma_count))
goto end_coredump;
if (!elf_core_write_extra_data(cprm))
@@ -1792,26 +1662,17 @@
}
end_coredump:
- set_fs(fs);
-
-cleanup:
- while (!list_empty(&thread_list)) {
- struct list_head *tmp = thread_list.next;
- list_del(tmp);
- kfree(list_entry(tmp, struct elf_thread_status, list));
+ while (thread_list) {
+ tmp = thread_list;
+ thread_list = thread_list->next;
+ kfree(tmp);
}
+ kvfree(vma_meta);
kfree(phdr4note);
kfree(elf);
- kfree(prstatus);
kfree(psinfo);
- kfree(notes);
- kfree(fpu);
kfree(shdr4extnum);
-#ifdef ELF_CORE_COPY_XFPREGS
- kfree(xfpu);
-#endif
return has_dumped;
-#undef NUM_NOTES
}
#endif /* CONFIG_ELF_CORE */
--
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