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-rw-r--r--arch/alpha/include/asm/elf.h6
-rw-r--r--arch/alpha/include/asm/ptrace.h1
-rw-r--r--arch/alpha/kernel/process.c8
-rw-r--r--arch/csky/kernel/process.c4
-rw-r--r--arch/m68k/kernel/process.c4
-rw-r--r--arch/microblaze/kernel/process.c2
-rw-r--r--arch/um/kernel/process.c3
-rw-r--r--arch/x86/include/asm/elf.h1
-rw-r--r--arch/x86/um/asm/elf.h4
-rw-r--r--fs/binfmt_elf.c271
-rw-r--r--fs/coredump.c1
-rw-r--r--include/linux/coredump.h1
-rw-r--r--include/linux/elfcore.h13
-rw-r--r--include/linux/ptrace.h9
-rw-r--r--kernel/signal.c2
15 files changed, 64 insertions, 266 deletions
diff --git a/arch/alpha/include/asm/elf.h b/arch/alpha/include/asm/elf.h
index 8049997fa372..e6da23f1da83 100644
--- a/arch/alpha/include/asm/elf.h
+++ b/arch/alpha/include/asm/elf.h
@@ -120,12 +120,6 @@ extern int dump_elf_task(elf_greg_t *dest, struct task_struct *task);
#define ELF_CORE_COPY_TASK_REGS(TASK, DEST) \
dump_elf_task(*(DEST), TASK)
-/* Similar, but for the FP registers. */
-
-extern int dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task);
-#define ELF_CORE_COPY_FPREGS(TASK, DEST) \
- dump_elf_task_fp(*(DEST), TASK)
-
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. This is trivial on Alpha,
but not so on other machines. */
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index df5f317ab3fc..3557ce64ed21 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -16,7 +16,6 @@
#define current_pt_regs() \
((struct pt_regs *) ((char *)current_thread_info() + 2*PAGE_SIZE) - 1)
-#define signal_pt_regs current_pt_regs
#define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index dbf1bc5e2ad2..65fdae9e48f3 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -333,14 +333,12 @@ dump_elf_task(elf_greg_t *dest, struct task_struct *task)
}
EXPORT_SYMBOL(dump_elf_task);
-int
-dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task)
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
- struct switch_stack *sw = (struct switch_stack *)task_pt_regs(task) - 1;
- memcpy(dest, sw->fp, 32 * 8);
+ struct switch_stack *sw = (struct switch_stack *)task_pt_regs(t) - 1;
+ memcpy(fpu, sw->fp, 32 * 8);
return 1;
}
-EXPORT_SYMBOL(dump_elf_task_fp);
/*
* Return saved PC of a blocked thread. This assumes the frame
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index eedddb155669..2b0ed515a88e 100644
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -9,6 +9,7 @@
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/ptrace.h>
+#include <linux/elfcore.h>
#include <asm/elf.h>
#include <abi/reg_ops.h>
@@ -69,12 +70,11 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
}
/* Fill in the fpu structure for a core dump. */
-int dump_fpu(struct pt_regs *regs, struct user_fp *fpu)
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
memcpy(fpu, &current->thread.user_fp, sizeof(*fpu));
return 1;
}
-EXPORT_SYMBOL(dump_fpu);
int dump_task_regs(struct task_struct *tsk, elf_gregset_t *pr_regs)
{
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index 2cb4a61bcfac..e06ce147c0b7 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -32,6 +32,7 @@
#include <linux/rcupdate.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
+#include <linux/elfcore.h>
#include <asm/traps.h>
#include <asm/machdep.h>
@@ -213,7 +214,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
}
/* Fill in the fpu structure for a core dump. */
-int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
if (FPU_IS_EMU) {
int i;
@@ -262,7 +263,6 @@ int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
return 1;
}
-EXPORT_SYMBOL(dump_fpu);
unsigned long __get_wchan(struct task_struct *p)
{
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 3c6241bcaea8..1f802aab2b96 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -133,7 +133,7 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
/*
* Set up a thread for executing a new program
*/
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
return 0; /* MicroBlaze has no separate FPU registers */
}
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index e38f41444721..47830ade35ed 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -33,6 +33,7 @@
#include <skas.h>
#include <registers.h>
#include <linux/time-internal.h>
+#include <linux/elfcore.h>
/*
* This is a per-cpu array. A processor only modifies its entry and it only
@@ -393,7 +394,7 @@ unsigned long __get_wchan(struct task_struct *p)
return 0;
}
-int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
int cpu = current_thread_info()->cpu;
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index be8b58da63b9..18fd06f7936a 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -222,7 +222,6 @@ do { \
/* I'm not sure if we can use '-' here */
#define ELF_PLATFORM ("x86_64")
extern void set_personality_64bit(void);
-extern unsigned int sysctl_vsyscall32;
extern int force_personality32;
#endif /* !CONFIG_X86_32 */
diff --git a/arch/x86/um/asm/elf.h b/arch/x86/um/asm/elf.h
index dcaf3b38a9e0..6523eb7c3bd1 100644
--- a/arch/x86/um/asm/elf.h
+++ b/arch/x86/um/asm/elf.h
@@ -201,10 +201,6 @@ typedef struct user_i387_struct elf_fpregset_t;
struct task_struct;
-extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
-
-#define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
-
#define ELF_EXEC_PAGESIZE 4096
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index d9af34f816a9..de63572a9404 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1718,7 +1718,6 @@ static int fill_files_note(struct memelfnote *note, struct coredump_params *cprm
return 0;
}
-#ifdef CORE_DUMP_USE_REGSET
#include <linux/regset.h>
struct elf_thread_core_info {
@@ -1739,6 +1738,7 @@ struct elf_note_info {
int thread_notes;
};
+#ifdef CORE_DUMP_USE_REGSET
/*
* When a regset has a writeback hook, we call it on each thread before
* dumping user memory. On register window machines, this makes sure the
@@ -1818,34 +1818,58 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
return 1;
}
+#else
+static int fill_thread_core_info(struct elf_thread_core_info *t,
+ const struct user_regset_view *view,
+ long signr, struct elf_note_info *info)
+{
+ struct task_struct *p = t->task;
+ elf_fpregset_t *fpu;
+
+ fill_prstatus(&t->prstatus.common, 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));
+ info->size += notesize(&t->notes[0]);
+
+ fpu = kzalloc(sizeof(elf_fpregset_t), GFP_KERNEL);
+ if (!fpu || !elf_core_copy_task_fpregs(p, fpu)) {
+ kfree(fpu);
+ return 1;
+ }
+
+ t->prstatus.pr_fpvalid = 1;
+ fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(*fpu), fpu);
+ info->size += notesize(&t->notes[1]);
+
+ return 1;
+}
+#endif
static int fill_note_info(struct elfhdr *elf, int phdrs,
struct elf_note_info *info,
struct coredump_params *cprm)
{
struct task_struct *dump_task = current;
- const struct user_regset_view *view = task_user_regset_view(dump_task);
+ const struct user_regset_view *view;
struct elf_thread_core_info *t;
struct elf_prpsinfo *psinfo;
struct core_thread *ct;
- unsigned int i;
-
- info->size = 0;
- info->thread = NULL;
psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
- if (psinfo == NULL) {
- info->psinfo.data = NULL; /* So we don't free this wrongly */
+ if (!psinfo)
return 0;
- }
-
fill_note(&info->psinfo, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
+#ifdef CORE_DUMP_USE_REGSET
+ view = task_user_regset_view(dump_task);
+
/*
* Figure out how many notes we're going to need for each thread.
*/
info->thread_notes = 0;
- for (i = 0; i < view->n; ++i)
+ for (int i = 0; i < view->n; ++i)
if (view->regsets[i].core_note_type != 0)
++info->thread_notes;
@@ -1864,11 +1888,23 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
*/
fill_elf_header(elf, phdrs,
view->e_machine, view->e_flags);
+#else
+ view = NULL;
+ info->thread_notes = 2;
+ fill_elf_header(elf, phdrs, ELF_ARCH, ELF_CORE_EFLAGS);
+#endif
/*
* Allocate a structure for each thread.
*/
- for (ct = &dump_task->signal->core_state->dumper; ct; ct = ct->next) {
+ info->thread = kzalloc(offsetof(struct elf_thread_core_info,
+ notes[info->thread_notes]),
+ GFP_KERNEL);
+ if (unlikely(!info->thread))
+ return 0;
+
+ info->thread->task = dump_task;
+ for (ct = dump_task->signal->core_state->dumper.next; ct; ct = ct->next) {
t = kzalloc(offsetof(struct elf_thread_core_info,
notes[info->thread_notes]),
GFP_KERNEL);
@@ -1876,17 +1912,8 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
return 0;
t->task = ct->task;
- if (ct->task == dump_task || !info->thread) {
- t->next = info->thread;
- info->thread = t;
- } else {
- /*
- * Make sure to keep the original task at
- * the head of the list.
- */
- t->next = info->thread->next;
- info->thread->next = t;
- }
+ t->next = info->thread->next;
+ info->thread->next = t;
}
/*
@@ -1914,11 +1941,6 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
return 1;
}
-static size_t get_note_info_size(struct elf_note_info *info)
-{
- return info->size;
-}
-
/*
* Write all the notes for each thread. When writing the first thread, the
* process-wide notes are interleaved after the first thread-specific note.
@@ -1973,197 +1995,6 @@ static void free_note_info(struct elf_note_info *info)
kvfree(info->files.data);
}
-#else
-
-/* 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;
- 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 elf_thread_status *t)
-{
- int sz = 0;
- struct task_struct *p = t->thread;
- t->num_notes = 0;
-
- fill_prstatus(&t->prstatus.common, 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, NULL,
- &t->fpu))) {
- fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu),
- &(t->fpu));
- t->num_notes++;
- sz += notesize(&t->notes[1]);
- }
- return sz;
-}
-
-struct elf_note_info {
- struct memelfnote *notes;
- struct memelfnote *notes_files;
- struct elf_prstatus *prstatus; /* NT_PRSTATUS */
- struct elf_prpsinfo *psinfo; /* NT_PRPSINFO */
- struct list_head thread_list;
- elf_fpregset_t *fpu;
- user_siginfo_t csigdata;
- int thread_status_size;
- int numnote;
-};
-
-static int elf_note_info_init(struct elf_note_info *info)
-{
- memset(info, 0, sizeof(*info));
- INIT_LIST_HEAD(&info->thread_list);
-
- /* Allocate space for ELF notes */
- info->notes = kmalloc_array(8, sizeof(struct memelfnote), GFP_KERNEL);
- if (!info->notes)
- return 0;
- info->psinfo = kmalloc(sizeof(*info->psinfo), GFP_KERNEL);
- if (!info->psinfo)
- return 0;
- info->prstatus = kmalloc(sizeof(*info->prstatus), GFP_KERNEL);
- if (!info->prstatus)
- return 0;
- info->fpu = kmalloc(sizeof(*info->fpu), GFP_KERNEL);
- if (!info->fpu)
- return 0;
- return 1;
-}
-
-static int fill_note_info(struct elfhdr *elf, int phdrs,
- struct elf_note_info *info,
- struct coredump_params *cprm)
-{
- struct core_thread *ct;
- struct elf_thread_status *ets;
-
- if (!elf_note_info_init(info))
- return 0;
-
- for (ct = current->signal->core_state->dumper.next;
- ct; ct = ct->next) {
- ets = kzalloc(sizeof(*ets), GFP_KERNEL);
- if (!ets)
- return 0;
-
- ets->thread = ct->task;
- list_add(&ets->list, &info->thread_list);
- }
-
- list_for_each_entry(ets, &info->thread_list, list) {
- int sz;
-
- sz = elf_dump_thread_status(cprm->siginfo->si_signo, ets);
- info->thread_status_size += sz;
- }
- /* now collect the dump for the current */
- memset(info->prstatus, 0, sizeof(*info->prstatus));
- fill_prstatus(&info->prstatus->common, current, cprm->siginfo->si_signo);
- elf_core_copy_regs(&info->prstatus->pr_reg, cprm->regs);
-
- /* Set up header */
- fill_elf_header(elf, phdrs, ELF_ARCH, ELF_CORE_EFLAGS);
-
- /*
- * Set up the notes in similar form to SVR4 core dumps made
- * with info from their /proc.
- */
-
- fill_note(info->notes + 0, "CORE", NT_PRSTATUS,
- sizeof(*info->prstatus), info->prstatus);
- fill_psinfo(info->psinfo, current->group_leader, current->mm);
- fill_note(info->notes + 1, "CORE", NT_PRPSINFO,
- sizeof(*info->psinfo), info->psinfo);
-
- fill_siginfo_note(info->notes + 2, &info->csigdata, cprm->siginfo);
- fill_auxv_note(info->notes + 3, current->mm);
- info->numnote = 4;
-
- if (fill_files_note(info->notes + info->numnote, cprm) == 0) {
- info->notes_files = info->notes + info->numnote;
- info->numnote++;
- }
-
- /* Try to dump the FPU. */
- info->prstatus->pr_fpvalid =
- elf_core_copy_task_fpregs(current, cprm->regs, info->fpu);
- if (info->prstatus->pr_fpvalid)
- fill_note(info->notes + info->numnote++,
- "CORE", NT_PRFPREG, sizeof(*info->fpu), info->fpu);
- return 1;
-}
-
-static size_t get_note_info_size(struct elf_note_info *info)
-{
- int sz = 0;
- int i;
-
- for (i = 0; i < info->numnote; i++)
- sz += notesize(info->notes + i);
-
- sz += info->thread_status_size;
-
- return sz;
-}
-
-static int write_note_info(struct elf_note_info *info,
- struct coredump_params *cprm)
-{
- struct elf_thread_status *ets;
- int i;
-
- for (i = 0; i < info->numnote; i++)
- if (!writenote(info->notes + i, cprm))
- return 0;
-
- /* write out the thread status notes section */
- list_for_each_entry(ets, &info->thread_list, list) {
- for (i = 0; i < ets->num_notes; i++)
- if (!writenote(&ets->notes[i], cprm))
- return 0;
- }
-
- return 1;
-}
-
-static void free_note_info(struct elf_note_info *info)
-{
- while (!list_empty(&info->thread_list)) {
- struct list_head *tmp = info->thread_list.next;
- list_del(tmp);
- kfree(list_entry(tmp, struct elf_thread_status, list));
- }
-
- /* Free data possibly allocated by fill_files_note(): */
- if (info->notes_files)
- kvfree(info->notes_files->data);
-
- kfree(info->prstatus);
- kfree(info->psinfo);
- kfree(info->notes);
- kfree(info->fpu);
-}
-
-#endif
-
static void fill_extnum_info(struct elfhdr *elf, struct elf_shdr *shdr4extnum,
elf_addr_t e_shoff, int segs)
{
@@ -2227,7 +2058,7 @@ static int elf_core_dump(struct coredump_params *cprm)
/* Write notes phdr entry */
{
- size_t sz = get_note_info_size(&info);
+ size_t sz = info.size;
/* For cell spufs */
sz += elf_coredump_extra_notes_size();
diff --git a/fs/coredump.c b/fs/coredump.c
index 3e8630c8d627..aaf7b362090c 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -529,7 +529,6 @@ void do_coredump(const kernel_siginfo_t *siginfo)
static atomic_t core_dump_count = ATOMIC_INIT(0);
struct coredump_params cprm = {
.siginfo = siginfo,
- .regs = signal_pt_regs(),
.limit = rlimit(RLIMIT_CORE),
/*
* We must use the same mm->flags while dumping core to avoid
diff --git a/include/linux/coredump.h b/include/linux/coredump.h
index 191dcf5af6cb..d3eba4360150 100644
--- a/include/linux/coredump.h
+++ b/include/linux/coredump.h
@@ -18,7 +18,6 @@ struct core_vma_metadata {
struct coredump_params {
const kernel_siginfo_t *siginfo;
- struct pt_regs *regs;
struct file *file;
unsigned long limit;
unsigned long mm_flags;
diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
index 346a8b56cdc8..9ec81290e3c8 100644
--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -88,22 +88,13 @@ static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t*
{
#if defined (ELF_CORE_COPY_TASK_REGS)
return ELF_CORE_COPY_TASK_REGS(t, elfregs);
-#elif defined (task_pt_regs)
+#else
elf_core_copy_regs(elfregs, task_pt_regs(t));
#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, struct pt_regs *regs, elf_fpregset_t *fpu)
-{
-#ifdef ELF_CORE_COPY_FPREGS
- return ELF_CORE_COPY_FPREGS(t, fpu);
-#else
- return dump_fpu(regs, fpu);
-#endif
-}
+int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
#ifdef CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS
/*
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index c952c5ba8fab..eaaef3ffec22 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -389,15 +389,6 @@ static inline void user_single_step_report(struct pt_regs *regs)
#define current_pt_regs() task_pt_regs(current)
#endif
-/*
- * unlike current_pt_regs(), this one is equal to task_pt_regs(current)
- * on *all* architectures; the only reason to have a per-arch definition
- * is optimisation.
- */
-#ifndef signal_pt_regs
-#define signal_pt_regs() task_pt_regs(current)
-#endif
-
#ifndef current_user_stack_pointer
#define current_user_stack_pointer() user_stack_pointer(current_pt_regs())
#endif
diff --git a/kernel/signal.c b/kernel/signal.c
index d140672185a4..848d5c282d35 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1255,7 +1255,7 @@ int send_signal_locked(int sig, struct kernel_siginfo *info,
static void print_fatal_signal(int signr)
{
- struct pt_regs *regs = signal_pt_regs();
+ struct pt_regs *regs = task_pt_regs(current);
pr_info("potentially unexpected fatal signal %d.\n", signr);
#if defined(__i386__) && !defined(__arch_um__)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 22:01:15 +0000