Re: [patch] thread-aware coredumps part 1, tcore-2.5.41-A6

From: mgross (mgross@unix-os.sc.intel.com)
Date: Tue Oct 08 2002 - 08:30:16 EST

Without the second component implementing the process suspending , the
"freeze in". You probably should keep the down_write / up_write on
(current->mm->mmap_sem) in elf_coredump().

When things settle down I would like to update that rather long comment block
talking about no longer needing to grab the mmap_sem. You're spin on this
work doesn't use my infamous "phantom run queue".

Thanks for your efforts to add this cool feature to the kernel :)

--mgross

On Tuesday 08 October 2002 08:09 am, Ingo Molnar wrote:
> Linus,
>
> the attached patch is the initial (and most important) step to get
> quality, thread-aware coredumps. The patch is a cleaned up and simplified
> version of Vamsi Krishna's and Mark Gross' 2.4 tcore patch, ported to
> 2.5.41.
>
> The patch does the following two things:
>
> - it writes out per-thread thread status notes, which debuggers then can
> use to figure out the per-thread state at the point of crash.
>
> - extends the ELF coredumping with extended FPU registers, and fills out
> the NT_PRXFPREG note with SSE state on x86.
>
> the patch also cleans up many aspects of ELF coredumping. The xfpu stuff
> (#ifdefs) is not particularly pretty, but is there a better way to do it?
>
> the next and final patch will be to 'freeze in' thread state upon
> coredumping - that patch obviously relies on this patch, but the current
> patch makes sense even without the 'state freezing' logic, so i believe we
> should consider it independently.
>
> Ingo
>
> --- linux/arch/i386/kernel/i387.c.orig 2002-09-20 17:20:37.000000000 +0200
> +++ linux/arch/i386/kernel/i387.c 2002-10-08 13:25:14.000000000 +0200
> @@ -528,3 +528,40 @@
>
> return fpvalid;
> }
> +
> +int dump_task_fpu(struct task_struct *tsk, struct user_i387_struct *fpu)
> +{
> + int fpvalid = tsk->used_math;
> +
> + if (fpvalid) {
> + if (tsk == current)
> + unlazy_fpu(tsk);
> + if (cpu_has_fxsr)
> + copy_fpu_fxsave(tsk, fpu);
> + else
> + copy_fpu_fsave(tsk, fpu);
> + }
> + return fpvalid;
> +}
> +
> +int dump_task_extended_fpu(struct task_struct *tsk, struct
> user_fxsr_struct *fpu) +{
> + int fpvalid = tsk->used_math && cpu_has_fxsr;
> +
> + if (fpvalid) {
> + if (tsk == current)
> + unlazy_fpu(tsk);
> + memcpy(fpu, &tsk->thread.i387.fxsave, sizeof(*fpu));
> + }
> + return fpvalid;
> +}
> +
> +
> +#ifdef CONFIG_SMP
> +void dump_smp_unlazy_fpu(void)
> +{
> + unlazy_fpu(current);
> + return;
> +}
> +#endif
> +
> --- linux/arch/i386/kernel/process.c.orig 2002-10-08 10:18:45.000000000
> +0200 +++ linux/arch/i386/kernel/process.c 2002-10-08 13:27:49.000000000
> +0200 @@ -19,6 +19,7 @@
> #include <linux/fs.h>
> #include <linux/kernel.h>
> #include <linux/mm.h>
> +#include <linux/elfcore.h>
> #include <linux/smp.h>
> #include <linux/smp_lock.h>
> #include <linux/stddef.h>
> @@ -373,6 +374,25 @@
> dump->u_fpvalid = dump_fpu (regs, &dump->i387);
> }
>
> +/*
> + * Capture the user space registers if the task is not running (in user
> space) + */
> +int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
> +{
> + struct pt_regs ptregs;
> +
> + ptregs = *(struct pt_regs *)
> + ((unsigned long)tsk + THREAD_SIZE - sizeof(ptregs));
> + ptregs.xcs &= 0xffff;
> + ptregs.xds &= 0xffff;
> + ptregs.xes &= 0xffff;
> + ptregs.xss &= 0xffff;
> +
> + elf_core_copy_regs(regs, &ptregs);
> +
> + return 1;
> +}
> +
> /*
> * This special macro can be used to load a debugging register
> */
> --- linux/fs/binfmt_elf.c.orig 2002-09-20 17:20:25.000000000 +0200
> +++ linux/fs/binfmt_elf.c 2002-10-08 13:35:18.000000000 +0200
> @@ -30,6 +30,7 @@
> #include <linux/elfcore.h>
> #include <linux/init.h>
> #include <linux/highuid.h>
> +#include <linux/smp.h>
> #include <linux/smp_lock.h>
> #include <linux/compiler.h>
> #include <linux/highmem.h>
> @@ -970,7 +971,7 @@
> /* #define DEBUG */
>
> #ifdef DEBUG
> -static void dump_regs(const char *str, elf_greg_t *r)
> +static void dump_regs(const char *str, elf_gregset_t *r)
> {
> int i;
> static const char *regs[] = { "ebx", "ecx", "edx", "esi", "edi", "ebp",
> @@ -1018,6 +1019,149 @@
> #define DUMP_SEEK(off) \
> if (!dump_seek(file, (off))) \
> goto end_coredump;
> +
> +static inline void fill_elf_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;
> + 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 = 0;
> + 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, off_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 inline 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 = p->pgrp;
> + prstatus->pr_sid = p->session;
> + jiffies_to_timeval(p->utime, &prstatus->pr_utime);
> + jiffies_to_timeval(p->stime, &prstatus->pr_stime);
> + jiffies_to_timeval(p->cutime, &prstatus->pr_cutime);
> + jiffies_to_timeval(p->cstime, &prstatus->pr_cstime);
> +}
> +
> +static inline void fill_psinfo(struct elf_prpsinfo *psinfo, struct
> task_struct *p) +{
> + int i;
> +
> + psinfo->pr_pid = p->pid;
> + psinfo->pr_ppid = p->parent->pid;
> + psinfo->pr_pgrp = p->pgrp;
> + psinfo->pr_sid = p->session;
> +
> + i = p->state ? ffz(~p->state) + 1 : 0;
> + psinfo->pr_state = i;
> + psinfo->pr_sname = (i < 0 || i > 5) ? '.' : "RSDZTD"[i];
> + psinfo->pr_zomb = psinfo->pr_sname == 'Z';
> + psinfo->pr_nice = task_nice(p);
> + psinfo->pr_flag = p->flags;
> + psinfo->pr_uid = NEW_TO_OLD_UID(p->uid);
> + psinfo->pr_gid = NEW_TO_OLD_GID(p->gid);
> + strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
> + return;
> +}
> +
> +/* 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 */
> +#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 threads pr_status and
> then + * create a single section for them in the final core file.
> + */
> +static int elf_dump_thread_status(long signr, struct task_struct * p,
> struct list_head * thread_list) +{
> +
> + struct elf_thread_status *t;
> + int sz = 0;
> +
> + t = kmalloc(sizeof(*t), GFP_ATOMIC);
> + if (!t)
> + return 0;
> +
> + INIT_LIST_HEAD(&t->list);
> + 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]);
> +
> + if ((t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, &t->fpu))) {
> + 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
> + list_add(&t->list, thread_list);
> + return sz;
> +}
> +
> /*
> * Actual dumper
> *
> @@ -1036,12 +1180,19 @@
> struct elfhdr elf;
> off_t offset = 0, dataoff;
> unsigned long limit = current->rlim[RLIMIT_CORE].rlim_cur;
> - int numnote = 4;
> - struct memelfnote notes[4];
> + int numnote = 5;
> + struct memelfnote notes[5];
> struct elf_prstatus prstatus; /* NT_PRSTATUS */
> - elf_fpregset_t fpu; /* NT_PRFPREG */
> struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
> -
> + struct task_struct *g, *p;
> + LIST_HEAD(thread_list);
> + struct list_head *t;
> + elf_fpregset_t fpu;
> +#ifdef ELF_CORE_COPY_XFPREGS
> + elf_fpxregset_t xfpu;
> +#endif
> + int thread_status_size = 0;
> +
> /* first copy the parameters from user space */
> memset(&psinfo, 0, sizeof(psinfo));
> {
> @@ -1076,34 +1227,49 @@
> *(struct pt_regs *)&prstatus.pr_reg = *regs;
> #endif
>
> - /* now stop all vm operations */
> - down_write(&current->mm->mmap_sem);
> - segs = current->mm->map_count;
> + /* capture the status of all other threads */
> + if (signr) {
> + read_lock(&tasklist_lock);
> + do_each_thread(g,p)
> + if (current->mm == p->mm && current != p) {
> + int sz = elf_dump_thread_status(signr, p, &thread_list);
> + if (!sz) {
> + read_unlock(&tasklist_lock);
> + goto cleanup;
> + } else
> + thread_status_size += sz;
> + }
> + while_each_thread(g,p);
> + read_unlock(&tasklist_lock);
> + }
> +
> + memset(&prstatus, 0, sizeof(prstatus));
> + fill_prstatus(&prstatus, current, signr);
> + elf_core_copy_regs(&prstatus.pr_reg, regs);
> +
> + /* We no longer stop all vm operations */
> +
> + /* This because those proceses that could possibly
> + * change map_count or the mmap / vma pages are now suspended.
> + *
> + * Only ptrace can touch these memory address, but it cannot change
> + * the map_count or the pages. So no possibility of crashing exists
> while dumping + * the mm->vm_next areas to the core file.
> + *
> + * Grabbing mmap_sem in this function is risky WRT the use of
> suspend_threads. + * Although no locks ups have been induced, if one of
> the suspended threads was + * in line for the current->mmap_sem and if
> gets it while on the Phantom runque, + * then we would dead lock in this
> function if we continue to attempt to down_write + * in this function.
> + */
> + segs = current->mm->map_count;
>
> #ifdef DEBUG
> printk("elf_core_dump: %d segs %lu limit\n", segs, limit);
> #endif
>
> /* Set up header */
> - 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;
> - 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(elf);
> - elf.e_shoff = 0;
> - elf.e_flags = 0;
> - elf.e_ehsize = sizeof(elf);
> - elf.e_phentsize = sizeof(struct elf_phdr);
> - elf.e_phnum = segs+1; /* Include notes */
> - elf.e_shentsize = 0;
> - elf.e_shnum = 0;
> - elf.e_shstrndx = 0;
> + fill_elf_header(&elf, segs+1); /* including notes section*/
>
> fs = get_fs();
> set_fs(KERNEL_DS);
> @@ -1120,60 +1286,29 @@
> * with info from their /proc.
> */
>
> - notes[0].name = "CORE";
> - notes[0].type = NT_PRSTATUS;
> - notes[0].datasz = sizeof(prstatus);
> - notes[0].data = &prstatus;
> - prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
> - prstatus.pr_sigpend = current->pending.signal.sig[0];
> - prstatus.pr_sighold = current->blocked.sig[0];
> - psinfo.pr_pid = prstatus.pr_pid = current->pid;
> - psinfo.pr_ppid = prstatus.pr_ppid = current->parent->pid;
> - psinfo.pr_pgrp = prstatus.pr_pgrp = current->pgrp;
> - psinfo.pr_sid = prstatus.pr_sid = current->session;
> - jiffies_to_timeval(current->utime, &prstatus.pr_utime);
> - jiffies_to_timeval(current->stime, &prstatus.pr_stime);
> - jiffies_to_timeval(current->cutime, &prstatus.pr_cutime);
> - jiffies_to_timeval(current->cstime, &prstatus.pr_cstime);
> -
> -#ifdef DEBUG
> - dump_regs("Passed in regs", (elf_greg_t *)regs);
> - dump_regs("prstatus regs", (elf_greg_t *)&prstatus.pr_reg);
> -#endif
> -
> - notes[1].name = "CORE";
> - notes[1].type = NT_PRPSINFO;
> - notes[1].datasz = sizeof(psinfo);
> - notes[1].data = &psinfo;
> - i = current->state ? ffz(~current->state) + 1 : 0;
> - psinfo.pr_state = i;
> - psinfo.pr_sname = (i < 0 || i > 5) ? '.' : "RSDZTD"[i];
> - psinfo.pr_zomb = psinfo.pr_sname == 'Z';
> - psinfo.pr_nice = task_nice(current);
> - psinfo.pr_flag = current->flags;
> - psinfo.pr_uid = NEW_TO_OLD_UID(current->uid);
> - psinfo.pr_gid = NEW_TO_OLD_GID(current->gid);
> - strncpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
> -
> - notes[2].name = "CORE";
> - notes[2].type = NT_TASKSTRUCT;
> - notes[2].datasz = sizeof(*current);
> - notes[2].data = current;
> -
> - /* Try to dump the FPU. */
> - prstatus.pr_fpvalid = dump_fpu (regs, &fpu);
> - if (!prstatus.pr_fpvalid)
> - {
> - numnote--;
> - }
> - else
> - {
> - notes[3].name = "CORE";
> - notes[3].type = NT_PRFPREG;
> - notes[3].datasz = sizeof(fpu);
> - notes[3].data = &fpu;
> - }
> + fill_note(&notes[0], "CORE", NT_PRSTATUS, sizeof(prstatus), &prstatus);
>
> + fill_psinfo(&psinfo, current);
> + fill_note(&notes[1], "CORE", NT_PRPSINFO, sizeof(psinfo), &psinfo);
> +
> + fill_note(&notes[2], "CORE", NT_TASKSTRUCT, sizeof(*current), current);
> +
> + /* Try to dump the FPU. */
> + if ((prstatus.pr_fpvalid = elf_core_copy_task_fpregs(current, &fpu))) {
> + fill_note(&notes[3], "CORE", NT_PRFPREG, sizeof(fpu), &fpu);
> + } else {
> + --numnote;
> + }
> +#ifdef ELF_CORE_COPY_XFPREGS
> + if (elf_core_copy_task_xfpregs(current, &xfpu)) {
> + fill_note(&notes[4], "LINUX", NT_PRXFPREG, sizeof(xfpu), &xfpu);
> + } else {
> + --numnote;
> + }
> +#else
> + numnote --;
> +#endif
> +
> /* Write notes phdr entry */
> {
> struct elf_phdr phdr;
> @@ -1181,17 +1316,11 @@
>
> for(i = 0; i < numnote; i++)
> sz += notesize(&notes[i]);
> +
> + sz += thread_status_size;
>
> - 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;
> -
> - offset += phdr.p_filesz;
> + fill_elf_note_phdr(&phdr, sz, offset);
> + offset += sz;
> DUMP_WRITE(&phdr, sizeof(phdr));
> }
>
> @@ -1220,10 +1349,19 @@
> DUMP_WRITE(&phdr, sizeof(phdr));
> }
>
> + /* 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);
>
> for(vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
> @@ -1267,11 +1405,19 @@
> (off_t) file->f_pos, offset);
> }
>
> - end_coredump:
> +end_coredump:
> set_fs(fs);
> - up_write(&current->mm->mmap_sem);
> +
> +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));
> + }
> +
> return has_dumped;
> }
> +
> #endif /* USE_ELF_CORE_DUMP */
>
> static int __init init_elf_binfmt(void)
> --- linux/include/linux/elfcore.h.orig 2002-09-20 17:20:25.000000000 +0200
> +++ linux/include/linux/elfcore.h 2002-10-08 13:31:29.000000000 +0200
> @@ -85,4 +85,45 @@
> #define PRARGSZ ELF_PRARGSZ
> #endif
>
> +#ifdef __KERNEL__
> +static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct
> pt_regs *regs) +{
> +#ifdef ELF_CORE_COPY_REGS
> + ELF_CORE_COPY_REGS((*elfregs), regs)
> +#else
> + BUG_ON(sizeof(*elfregs) != sizeof(*regs));
> + *(struct pt_regs *)elfregs = *regs;
> +#endif
> +}
> +
> +static inline int elf_core_copy_task_regs(struct task_struct *t,
> elf_gregset_t* elfregs) +{
> +#ifdef ELF_CORE_COPY_TASK_REGS
> +
> + return ELF_CORE_COPY_TASK_REGS(t, elfregs);
> +#endif
> + return 0;
> +}
> +
> +extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
> +
> +static inline int elf_core_copy_task_fpregs(struct task_struct *t,
> elf_fpregset_t *fpu) +{
> +#ifdef ELF_CORE_COPY_FPREGS
> + return ELF_CORE_COPY_FPREGS(t, fpu);
> +#else
> + return dump_fpu(NULL, fpu);
> +#endif
> +}
> +
> +#ifdef ELF_CORE_COPY_XFPREGS
> +static inline int elf_core_copy_task_xfpregs(struct task_struct *t,
> elf_fpxregset_t *xfpu) +{
> + return ELF_CORE_COPY_XFPREGS(t, xfpu);
> +}
> +#endif
> +
> +#endif /* __KERNEL__ */
> +
> +
> #endif /* _LINUX_ELFCORE_H */
> --- linux/include/linux/elf.h.orig 2002-10-08 10:18:45.000000000 +0200
> +++ linux/include/linux/elf.h 2002-10-08 13:08:47.000000000 +0200
> @@ -1,6 +1,7 @@
> #ifndef _LINUX_ELF_H
> #define _LINUX_ELF_H
>
> +#include <linux/sched.h>
> #include <linux/types.h>
> #include <asm/elf.h>
>
> @@ -575,7 +576,8 @@
> #define NT_PRFPREG 2
> #define NT_PRPSINFO 3
> #define NT_TASKSTRUCT 4
> -#define NT_PRFPXREG 20
> +#define NT_PRXFPREG 0x46e62b7f /* copied from
> gdb5.1/include/elf/common.h */ +
>
> /* Note header in a PT_NOTE section */
> typedef struct elf32_note {
> --- linux/include/asm-i386/elf.h.orig 2002-09-20 17:20:31.000000000 +0200
> +++ linux/include/asm-i386/elf.h 2002-10-08 13:08:47.000000000 +0200
> @@ -7,6 +7,7 @@
>
> #include <asm/ptrace.h>
> #include <asm/user.h>
> +#include <asm/processor.h>
>
> #include <linux/utsname.h>
>
> @@ -59,6 +60,9 @@
>
> /* Wow, the "main" arch needs arch dependent functions too.. :) */
>
> +#define savesegment(seg,value) \
> + asm volatile("movl %%" #seg ",%0":"=m" (*(int *)&(value)))
> +
> /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
> now struct_user_regs, they are different) */
>
> @@ -72,9 +76,8 @@
> pr_reg[6] = regs->eax; \
> pr_reg[7] = regs->xds; \
> pr_reg[8] = regs->xes; \
> - /* fake once used fs and gs selectors? */ \
> - pr_reg[9] = regs->xds; /* was fs and __fs */ \
> - pr_reg[10] = regs->xds; /* was gs and __gs */ \
> + savesegment(fs,pr_reg[9]); \
> + savesegment(gs,pr_reg[10]); \
> pr_reg[11] = regs->orig_eax; \
> pr_reg[12] = regs->eip; \
> pr_reg[13] = regs->xcs; \
> @@ -99,6 +102,20 @@
>
> #ifdef __KERNEL__
> #define SET_PERSONALITY(ex, ibcs2)
> set_personality((ibcs2)?PER_SVR4:PER_LINUX) +
> +extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
> +extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
> +extern int dump_task_extended_fpu (struct task_struct *, struct
> user_fxsr_struct *); +
> +#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk,
> elf_regs) +#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk,
> elf_fpregs) +#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs)
> dump_task_extended_fpu(tsk, elf_xfpregs) +
> +#ifdef CONFIG_SMP
> +extern void dump_smp_unlazy_fpu(void);
> +#define ELF_CORE_SYNC dump_smp_unlazy_fpu
> +#endif
> +
> #endif
>
> #endif
>
> -
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This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:25 EST