[PATCH] Add linux/elfcore-compat.h

[Roland McGrath <roland@redhat.com>]

This adds the linux/elfcore-compat.h header file, which is the
CONFIG_COMPAT analog of the linux/elfcore.h header.  Each arch
that needs to fake out fs/binfmt_elf.c for its compat code can
use this header to replace the hand-copied definitions of the
compat variants of struct elf_prstatus et al.  Only the pr_reg
field varies by arch, so asm/{compat,elf}.h must define
compat_elf_gregset_t before linux/elfcore-compat.h can be used.

Signed-off-by: Roland McGrath <roland@redhat.com>
---
 include/linux/elfcore-compat.h |   55 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 55 insertions(+), 0 deletions(-)
 create mode 100644 include/linux/elfcore-compat.h

diff --git a/include/linux/elfcore-compat.h b/include/linux/elfcore-compat.h
new file mode 100644
index 0000000..532d13a
--- /dev/null
+++ b/include/linux/elfcore-compat.h
@@ -0,0 +1,55 @@
+#ifndef _LINUX_ELFCORE_COMPAT_H
+#define _LINUX_ELFCORE_COMPAT_H
+
+#include <linux/elf.h>
+#include <linux/elfcore.h>
+#include <linux/compat.h>
+
+/*
+ * Make sure these layouts match the linux/elfcore.h native definitions.
+ */
+
+struct compat_elf_siginfo
+{
+	compat_int_t			si_signo;
+	compat_int_t			si_code;
+	compat_int_t			si_errno;
+};
+
+struct compat_elf_prstatus
+{
+	struct compat_elf_siginfo	pr_info;
+	short				pr_cursig;
+	compat_ulong_t			pr_sigpend;
+	compat_ulong_t			pr_sighold;
+	compat_pid_t			pr_pid;
+	compat_pid_t			pr_ppid;
+	compat_pid_t			pr_pgrp;
+	compat_pid_t			pr_sid;
+	struct compat_timeval		pr_utime;
+	struct compat_timeval		pr_stime;
+	struct compat_timeval		pr_cutime;
+	struct compat_timeval		pr_cstime;
+	compat_elf_gregset_t		pr_reg;
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+	compat_ulong_t			pr_exec_fdpic_loadmap;
+	compat_ulong_t			pr_interp_fdpic_loadmap;
+#endif
+	compat_int_t			pr_fpvalid;
+};
+
+struct compat_elf_prpsinfo
+{
+	char				pr_state;
+	char				pr_sname;
+	char				pr_zomb;
+	char				pr_nice;
+	compat_ulong_t			pr_flag;
+	compat_uid_t			pr_uid;
+	compat_gid_t			pr_gid;
+	compat_pid_t			pr_pid, pr_ppid, pr_pgrp, pr_sid;
+	char				pr_fname[16];
+	char				pr_psargs[ELF_PRARGSZ];
+};
+
+#endif /* _LINUX_ELFCORE_COMPAT_H */
-
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