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authorH. J. Lu <hjl.tools@gmail.com>2012-02-14 13:34:52 -0800
committerH. Peter Anvin <hpa@zytor.com>2012-02-20 12:48:48 -0800
commit0953f65d5db728df0fdc3d510a71fd811a3be758 (patch)
tree2f1c0f221a31da94f4b8565db12b945822af98b4 /fs/binfmt_elf.c
parent4ee5c0d05ce9b4e48e586a1ee168f166d191ddda (diff)
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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: H. 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>
Diffstat (limited to 'fs/binfmt_elf.c')
-rw-r--r--fs/binfmt_elf.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index bcb884e2d613..43ba478c3386 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -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);
}