[PATCH] FDPIC: Add coredump capability for the ELF-FDPIC binfmt (6d8c4e3b) · Commits · git / linux-net

arch/frv/kernel/process.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -371,3 +371,11 @@ int elf_check_arch(const struct elf32_hdr *hdr)

		return 1;
		}

		int dump_fpu(struct pt_regs regs, elf_fpregset_t fpregs)
		{
		memcpy(fpregs,
		&current->thread.user->f,
		sizeof(current->thread.user->f));
		return 1;
		}

fs/binfmt_elf_fdpic.c

+674 −2

Original line number	Diff line number	Diff line
		@@ -24,7 +24,9 @@
		#include <linux/file.h>
		#include <linux/fcntl.h>
		#include <linux/slab.h>
		#include <linux/pagemap.h>
		#include <linux/highmem.h>
		#include <linux/highuid.h>
		#include <linux/personality.h>
		#include <linux/ptrace.h>
		#include <linux/init.h>
		@@ -48,6 +50,12 @@ typedef char *elf_caddr_t;
		#define kdebug(fmt, ...) do {} while(0)
		#endif

		#if 0
		#define kdcore(fmt, ...) printk("FDPIC "fmt"\n" ,##__VA_ARGS__ )
		#else
		#define kdcore(fmt, ...) do {} while(0)
		#endif

		MODULE_LICENSE("GPL");

		static int load_elf_fdpic_binary(struct linux_binprm , struct pt_regs );
		@@ -70,10 +78,16 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *,
		static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *,
		struct file , struct mm_struct );

		#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
		static int elf_fdpic_core_dump(long, struct pt_regs , struct file );
		#endif

		static struct linux_binfmt elf_fdpic_format = {
		.module = THIS_MODULE,
		.load_binary = load_elf_fdpic_binary,
		// .core_dump = elf_fdpic_core_dump,
		#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
		.core_dump = elf_fdpic_core_dump,
		#endif
		.min_coredump = ELF_EXEC_PAGESIZE,
		};

		@@ -87,7 +101,7 @@ static void __exit exit_elf_fdpic_binfmt(void)
		unregister_binfmt(&elf_fdpic_format);
		}

		module_init(init_elf_fdpic_binfmt);
		core_initcall(init_elf_fdpic_binfmt);
		module_exit(exit_elf_fdpic_binfmt);

		static int is_elf_fdpic(struct elfhdr hdr, struct file file)
		@@ -1118,3 +1132,661 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,

		return 0;
		}

		/*****************************************************************************/
		/*
		* ELF-FDPIC core dumper
		*
		* Modelled on fs/exec.c:aout_core_dump()
		* Jeremy Fitzhardinge <jeremy@sw.oz.au>
		*
		* Modelled on fs/binfmt_elf.c core dumper
		*/
		#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)

		/*
		* These are the only things you should do on a core-file: use only these
		* functions to write out all the necessary info.
		*/
		static int dump_write(struct file file, const void addr, int nr)
		{
		return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
		}

		static int dump_seek(struct file *file, loff_t off)
		{
		if (file->f_op->llseek) {
		if (file->f_op->llseek(file, off, SEEK_SET) != off)
		return 0;
		} else {
		file->f_pos = off;
		}
		return 1;
		}

		/*
		* 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)
		{
		/* Do not dump I/O mapped devices or special mappings */
		if (vma->vm_flags & (VM_IO \| VM_RESERVED)) {
		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.
		*/
		if (!(vma->vm_flags & VM_READ)) {
		kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags);
		return 0;
		}

		/* Dump shared memory only if mapped from an anonymous file. */
		if (vma->vm_flags & VM_SHARED) {
		if (vma->vm_file->f_dentry->d_inode->i_nlink == 0) {
		kdcore("%08lx: %08lx: no (share)", vma->vm_start, vma->vm_flags);
		return 1;
		}

		kdcore("%08lx: %08lx: no (share)", vma->vm_start, vma->vm_flags);
		return 0;
		}

		#ifdef CONFIG_MMU
		/* If it hasn't been written to, don't write it out */
		if (!vma->anon_vma) {
		kdcore("%08lx: %08lx: no (!anon)", vma->vm_start, vma->vm_flags);
		return 0;
		}
		#endif

		kdcore("%08lx: %08lx: yes", vma->vm_start, vma->vm_flags);
		return 1;
		}

		/* An ELF note in memory */
		struct memelfnote
		{
		const char *name;
		int type;
		unsigned int datasz;
		void *data;
		};

		static int notesize(struct memelfnote *en)
		{
		int sz;

		sz = sizeof(struct elf_note);
		sz += roundup(strlen(en->name) + 1, 4);
		sz += roundup(en->datasz, 4);

		return sz;
		}

		/* #define DEBUG */

		#define DUMP_WRITE(addr, nr) \
		do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
		#define DUMP_SEEK(off) \
		do { if (!dump_seek(file, (off))) return 0; } while(0)

		static int writenote(struct memelfnote men, struct file file)
		{
		struct elf_note en;

		en.n_namesz = strlen(men->name) + 1;
		en.n_descsz = men->datasz;
		en.n_type = men->type;

		DUMP_WRITE(&en, sizeof(en));
		DUMP_WRITE(men->name, en.n_namesz);
		/* XXX - cast from long long to long to avoid need for libgcc.a */
		DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
		DUMP_WRITE(men->data, men->datasz);
		DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */

		return 1;
		}
		#undef DUMP_WRITE
		#undef DUMP_SEEK

		#define DUMP_WRITE(addr, nr) \
		if ((size += (nr)) > limit \|\| !dump_write(file, (addr), (nr))) \
		goto end_coredump;
		#define DUMP_SEEK(off) \
		if (!dump_seek(file, (off))) \
		goto end_coredump;

		static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs)
		{
		memcpy(elf->e_ident, ELFMAG, SELFMAG);
		elf->e_ident[EI_CLASS] = ELF_CLASS;
		elf->e_ident[EI_DATA] = ELF_DATA;
		elf->e_ident[EI_VERSION] = EV_CURRENT;
		elf->e_ident[EI_OSABI] = ELF_OSABI;
		memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);

		elf->e_type = ET_CORE;
		elf->e_machine = ELF_ARCH;
		elf->e_version = EV_CURRENT;
		elf->e_entry = 0;
		elf->e_phoff = sizeof(struct elfhdr);
		elf->e_shoff = 0;
		elf->e_flags = ELF_FDPIC_CORE_EFLAGS;
		elf->e_ehsize = sizeof(struct elfhdr);
		elf->e_phentsize = sizeof(struct elf_phdr);
		elf->e_phnum = segs;
		elf->e_shentsize = 0;
		elf->e_shnum = 0;
		elf->e_shstrndx = 0;
		return;
		}

		static inline void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
		{
		phdr->p_type = PT_NOTE;
		phdr->p_offset = offset;
		phdr->p_vaddr = 0;
		phdr->p_paddr = 0;
		phdr->p_filesz = sz;
		phdr->p_memsz = 0;
		phdr->p_flags = 0;
		phdr->p_align = 0;
		return;
		}

		static inline void fill_note(struct memelfnote note, const char name, int type,
		unsigned int sz, void *data)
		{
		note->name = name;
		note->type = type;
		note->datasz = sz;
		note->data = data;
		return;
		}

		/*
		* fill up all the fields in prstatus from the given task struct, except
		* registers which need to be filled up seperately.
		*/
		static void fill_prstatus(struct elf_prstatus *prstatus,
		struct task_struct *p, long signr)
		{
		prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
		prstatus->pr_sigpend = p->pending.signal.sig[0];
		prstatus->pr_sighold = p->blocked.sig[0];
		prstatus->pr_pid = p->pid;
		prstatus->pr_ppid = p->parent->pid;
		prstatus->pr_pgrp = process_group(p);
		prstatus->pr_sid = p->signal->session;
		if (thread_group_leader(p)) {
		/*
		* This is the record for the group leader. Add in the
		* cumulative times of previous dead threads. This total
		* won't include the time of each live thread whose state
		* is included in the core dump. The final total reported
		* to our parent process when it calls wait4 will include
		* those sums as well as the little bit more time it takes
		* this and each other thread to finish dying after the
		* core dump synchronization phase.
		*/
		cputime_to_timeval(cputime_add(p->utime, p->signal->utime),
		&prstatus->pr_utime);
		cputime_to_timeval(cputime_add(p->stime, p->signal->stime),
		&prstatus->pr_stime);
		} else {
		cputime_to_timeval(p->utime, &prstatus->pr_utime);
		cputime_to_timeval(p->stime, &prstatus->pr_stime);
		}
		cputime_to_timeval(p->signal->cutime, &prstatus->pr_cutime);
		cputime_to_timeval(p->signal->cstime, &prstatus->pr_cstime);

		prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap;
		prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap;
		}

		static int fill_psinfo(struct elf_prpsinfo psinfo, struct task_struct p,
		struct mm_struct *mm)
		{
		unsigned int i, len;

		/* first copy the parameters from user space */
		memset(psinfo, 0, sizeof(struct elf_prpsinfo));

		len = mm->arg_end - mm->arg_start;
		if (len >= ELF_PRARGSZ)
		len = ELF_PRARGSZ - 1;
		if (copy_from_user(&psinfo->pr_psargs,
		(const char __user *) mm->arg_start, len))
		return -EFAULT;
		for (i = 0; i < len; i++)
		if (psinfo->pr_psargs[i] == 0)
		psinfo->pr_psargs[i] = ' ';
		psinfo->pr_psargs[len] = 0;

		psinfo->pr_pid = p->pid;
		psinfo->pr_ppid = p->parent->pid;
		psinfo->pr_pgrp = process_group(p);
		psinfo->pr_sid = p->signal->session;

		i = p->state ? ffz(~p->state) + 1 : 0;
		psinfo->pr_state = i;
		psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i];
		psinfo->pr_zomb = psinfo->pr_sname == 'Z';
		psinfo->pr_nice = task_nice(p);
		psinfo->pr_flag = p->flags;
		SET_UID(psinfo->pr_uid, p->uid);
		SET_GID(psinfo->pr_gid, p->gid);
		strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));

		return 0;
		}

		/* 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 */
		elf_fpregset_t fpu; /* NT_PRFPREG */
		struct task_struct *thread;
		#ifdef ELF_CORE_COPY_XFPREGS
		elf_fpxregset_t xfpu; /* NT_PRXFPREG */
		#endif
		struct memelfnote notes[3];
		int num_notes;
		};

		/*
		* In order to add the specific thread information for the elf file format,
		* 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)
		{
		struct task_struct *p = t->thread;
		int sz = 0;

		t->num_notes = 0;

		fill_prstatus(&t->prstatus, p, signr);
		elf_core_copy_task_regs(p, &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]);

		t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu);
		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]);
		}

		#ifdef ELF_CORE_COPY_XFPREGS
		if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
		fill_note(&t->notes[2], "LINUX", NT_PRXFPREG, sizeof(t->xfpu),
		&t->xfpu);
		t->num_notes++;
		sz += notesize(&t->notes[2]);
		}
		#endif
		return sz;
		}

		/*
		* dump the segments for an MMU process
		*/
		#ifdef CONFIG_MMU
		static int elf_fdpic_dump_segments(struct file file, struct mm_struct mm,
		size_t size, unsigned long limit)
		{
		struct vm_area_struct *vma;

		for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
		unsigned long addr;

		if (!maydump(vma))
		continue;

		for (addr = vma->vm_start;
		addr < vma->vm_end;
		addr += PAGE_SIZE
		) {
		struct vm_area_struct *vma;
		struct page *page;

		if (get_user_pages(current, current->mm, addr, 1, 0, 1,
		&page, &vma) <= 0) {
		DUMP_SEEK(file->f_pos + PAGE_SIZE);
		}
		else if (page == ZERO_PAGE(addr)) {
		DUMP_SEEK(file->f_pos + PAGE_SIZE);
		page_cache_release(page);
		}
		else {
		void *kaddr;

		flush_cache_page(vma, addr, page_to_pfn(page));
		kaddr = kmap(page);
		if ((size += PAGE_SIZE) > limit \|\|
		!dump_write(file, kaddr, PAGE_SIZE)
		) {
		kunmap(page);
		page_cache_release(page);
		return -EIO;
		}
		kunmap(page);
		page_cache_release(page);
		}
		}
		}

		return 0;

		end_coredump:
		return -EFBIG;
		}
		#endif

		/*
		* dump the segments for a NOMMU process
		*/
		#ifndef CONFIG_MMU
		static int elf_fdpic_dump_segments(struct file file, struct mm_struct mm,
		size_t size, unsigned long limit)
		{
		struct vm_list_struct *vml;

		for (vml = current->mm->context.vmlist; vml; vml = vml->next) {
		struct vm_area_struct *vma = vml->vma;

		if (!maydump(vma))
		continue;

		if ((size += PAGE_SIZE) > limit)
		return -EFBIG;

		if (!dump_write(file, (void *) vma->vm_start,
		vma->vm_end - vma->vm_start))
		return -EIO;
		}

		return 0;
		}
		#endif

		/*
		* Actual dumper
		*
		* This is a two-pass process; first we find the offsets of the bits,
		* and then they are actually written out. If we run out of core limit
		* we just truncate.
		*/
		static int elf_fdpic_core_dump(long signr, struct pt_regs *regs,
		struct file *file)
		{
		#define NUM_NOTES 6
		int has_dumped = 0;
		mm_segment_t fs;
		int segs;
		size_t size = 0;
		int i;
		struct vm_area_struct *vma;
		struct elfhdr *elf = NULL;
		loff_t offset = 0, dataoff;
		unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
		int numnote;
		struct memelfnote *notes = NULL;
		struct elf_prstatus prstatus = NULL; / NT_PRSTATUS */
		struct elf_prpsinfo psinfo = NULL; / NT_PRPSINFO */
		struct task_struct g, p;
		LIST_HEAD(thread_list);
		struct list_head *t;
		elf_fpregset_t *fpu = NULL;
		#ifdef ELF_CORE_COPY_XFPREGS
		elf_fpxregset_t *xfpu = NULL;
		#endif
		int thread_status_size = 0;
		#ifndef CONFIG_MMU
		struct vm_list_struct *vml;
		#endif
		elf_addr_t *auxv;

		/*
		* 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.
		*/

		/* 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;
		psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
		if (!psinfo)
		goto cleanup;
		notes = kmalloc(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

		if (signr) {
		struct elf_thread_status *tmp;
		read_lock(&tasklist_lock);
		do_each_thread(g,p)
		if (current->mm == p->mm && current != p) {
		tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
		if (!tmp) {
		read_unlock(&tasklist_lock);
		goto cleanup;
		}
		INIT_LIST_HEAD(&tmp->list);
		tmp->thread = p;
		list_add(&tmp->list, &thread_list);
		}
		while_each_thread(g,p);
		read_unlock(&tasklist_lock);
		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(signr, tmp);
		thread_status_size += sz;
		}
		}

		/* now collect the dump for the current */
		fill_prstatus(prstatus, current, signr);
		elf_core_copy_regs(&prstatus->pr_reg, regs);

		#ifdef CONFIG_MMU
		segs = current->mm->map_count;
		#else
		segs = 0;
		for (vml = current->mm->context.vmlist; vml; vml = vml->next)
		segs++;
		#endif
		#ifdef ELF_CORE_EXTRA_PHDRS
		segs += ELF_CORE_EXTRA_PHDRS;
		#endif

		/* Set up header */
		fill_elf_fdpic_header(elf, segs + 1); /* including notes section */

		has_dumped = 1;
		current->flags \|= PF_DUMPCORE;

		/*
		* Set up the notes in similar form to SVR4 core dumps made
		* 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;

		auxv = (elf_addr_t *) current->mm->saved_auxv;

		i = 0;
		do
		i += 2;
		while (auxv[i - 2] != AT_NULL);
		fill_note(&notes[numnote++], "CORE", NT_AUXV,
		i * sizeof(elf_addr_t), auxv);

		/* Try to dump the FPU. */
		if ((prstatus->pr_fpvalid =
		elf_core_copy_task_fpregs(current, 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", NT_PRXFPREG, sizeof(*xfpu), xfpu);
		#endif

		fs = get_fs();
		set_fs(KERNEL_DS);

		DUMP_WRITE(elf, sizeof(*elf));
		offset += sizeof(elf); / Elf header */
		offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers */

		/* Write notes phdr entry */
		{
		struct elf_phdr phdr;
		int sz = 0;

		for (i = 0; i < numnote; i++)
		sz += notesize(notes + i);

		sz += thread_status_size;

		fill_elf_note_phdr(&phdr, sz, offset);
		offset += sz;
		DUMP_WRITE(&phdr, sizeof(phdr));
		}

		/* Page-align dumped data */
		dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);

		/* write program headers for segments dump */
		for (
		#ifdef CONFIG_MMU
		vma = current->mm->mmap; vma; vma = vma->vm_next
		#else
		vml = current->mm->context.vmlist; vml; vml = vml->next
		#endif
		) {
		struct elf_phdr phdr;
		size_t sz;

		#ifndef CONFIG_MMU
		vma = vml->vma;
		#endif

		sz = vma->vm_end - vma->vm_start;

		phdr.p_type = PT_LOAD;
		phdr.p_offset = offset;
		phdr.p_vaddr = vma->vm_start;
		phdr.p_paddr = 0;
		phdr.p_filesz = maydump(vma) ? sz : 0;
		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 \|= PF_W;
		if (vma->vm_flags & VM_EXEC)
		phdr.p_flags \|= PF_X;
		phdr.p_align = ELF_EXEC_PAGESIZE;

		DUMP_WRITE(&phdr, sizeof(phdr));
		}

		#ifdef ELF_CORE_WRITE_EXTRA_PHDRS
		ELF_CORE_WRITE_EXTRA_PHDRS;
		#endif

		/* write out the notes section */
		for (i = 0; i < numnote; i++)
		if (!writenote(notes + i, file))
		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 (i = 0; i < tmp->num_notes; i++)
		if (!writenote(&tmp->notes[i], file))
		goto end_coredump;
		}

		DUMP_SEEK(dataoff);

		if (elf_fdpic_dump_segments(file, current->mm, &size, &limit) < 0)
		goto end_coredump;

		#ifdef ELF_CORE_WRITE_EXTRA_DATA
		ELF_CORE_WRITE_EXTRA_DATA;
		#endif

		if (file->f_pos != offset) {
		/* Sanity check */
		printk(KERN_WARNING
		"elf_core_dump: file->f_pos (%lld) != offset (%lld)\n",
		file->f_pos, offset);
		}

		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));
		}

		kfree(elf);
		kfree(prstatus);
		kfree(psinfo);
		kfree(notes);
		kfree(fpu);
		#ifdef ELF_CORE_COPY_XFPREGS
		kfree(xfpu);
		#endif
		return has_dumped;
		#undef NUM_NOTES
		}

		#endif /* USE_ELF_CORE_DUMP */

include/asm-frv/elf.h

+2 −4

Original line number	Diff line number	Diff line
		@@ -64,7 +64,7 @@ typedef unsigned long elf_greg_t;
		#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
		typedef elf_greg_t elf_gregset_t[ELF_NGREG];

		typedef struct fpmedia_struct elf_fpregset_t;
		typedef struct user_fpmedia_regs elf_fpregset_t;

		/*
		* This is used to ensure we don't load something for the wrong architecture.
		@@ -116,6 +116,7 @@ do { \
		} while(0)

		#define USE_ELF_CORE_DUMP
		#define ELF_FDPIC_CORE_EFLAGS EF_FRV_FDPIC
		#define ELF_EXEC_PAGESIZE 16384

		/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
		@@ -125,9 +126,6 @@ do { \

		#define ELF_ET_DYN_BASE 0x08000000UL

		#define ELF_CORE_COPY_REGS(pr_reg, regs) \
		memcpy(&pr_reg[0], &regs->sp, 31 * sizeof(uint32_t));

		/* This yields a mask that user programs can use to figure out what
		instruction set this cpu supports. */

include/linux/elfcore.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -60,6 +60,16 @@ struct elf_prstatus
		long pr_instr; /* Current instruction */
		#endif
		elf_gregset_t pr_reg; /* GP registers */
		#ifdef CONFIG_BINFMT_ELF_FDPIC
		/* 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.
		*/
		unsigned long pr_exec_fdpic_loadmap;
		unsigned long pr_interp_fdpic_loadmap;
		#endif
		int pr_fpvalid; /* True if math co-processor being used. */
		};