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Commit 0953f65d authored by H. J. Lu's avatar H. J. Lu Committed by H. Peter Anvin
Browse files

elf: Allow core dump-related fields to be overridden 



Allow some core dump-related fields to be overridden.  This allows
core dumps to work correctly for x32.

Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
parent 4ee5c0d0

fs/binfmt_elf.c

+20 −4
Original line number Diff line number Diff line
@@ -1390,6 +1390,22 @@ static void do_thread_regset_writeback(struct task_struct *task, 
		regset->writeback(task, regset, 1);

}



#ifndef PR_REG_SIZE

#define PR_REG_SIZE(S) sizeof(S)

#endif



#ifndef PRSTATUS_SIZE

#define PRSTATUS_SIZE(S) sizeof(S)

#endif



#ifndef PR_REG_PTR

#define PR_REG_PTR(S) (&((S)->pr_reg))

#endif



#ifndef SET_PR_FPVALID

#define SET_PR_FPVALID(S, V) ((S)->pr_fpvalid = (V))

#endif



static int fill_thread_core_info(struct elf_thread_core_info *t,

				 const struct user_regset_view *view,

				 long signr, size_t *total)
@@ -1404,11 +1420,11 @@ static int fill_thread_core_info(struct elf_thread_core_info *t, 
	 */

	fill_prstatus(&t->prstatus, t->task, signr);

	(void) view->regsets[0].get(t->task, &view->regsets[0],

				    0, sizeof(t->prstatus.pr_reg),

				    &t->prstatus.pr_reg, NULL);

				    0, PR_REG_SIZE(t->prstatus.pr_reg),

				    PR_REG_PTR(&t->prstatus), NULL);



	fill_note(&t->notes[0], "CORE", NT_PRSTATUS,

		  sizeof(t->prstatus), &t->prstatus);

		  PRSTATUS_SIZE(t->prstatus), &t->prstatus);

	*total += notesize(&t->notes[0]);



	do_thread_regset_writeback(t->task, &view->regsets[0]);
@@ -1438,7 +1454,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t, 
						  regset->core_note_type,

						  size, data);

				else {

					t->prstatus.pr_fpvalid = 1;

					SET_PR_FPVALID(&t->prstatus, 1);

					fill_note(&t->notes[i], "CORE",

						  NT_PRFPREG, size, data);

				}