Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 106 insertions, 0 deletions

diff --git a/arch/mips/kernel/binfmt_elfn32.c b/arch/mips/kernel/binfmt_elfn32.c
new file mode 100644
index 000000000..89b234844
--- /dev/null
+++ b/arch/mips/kernel/binfmt_elfn32.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for n32 Linux/MIPS ELF binaries.
+ * Author: Ralf Baechle (ralf@linux-mips.org)
+ *
+ * Copyright (C) 1999, 2001 Ralf Baechle
+ * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
+ *
+ * Heavily inspired by the 32-bit Sparc compat code which is
+ * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek	(jj@ultra.linux.cz)
+ */
+
+#define ELF_ARCH		EM_MIPS
+#define ELF_CLASS		ELFCLASS32
+#ifdef __MIPSEB__
+#define ELF_DATA		ELFDATA2MSB;
+#else /* __MIPSEL__ */
+#define ELF_DATA		ELFDATA2LSB;
+#endif
+
+/* ELF register definitions */
+#define ELF_NGREG	45
+#define ELF_NFPREG	33
+
+typedef unsigned long elf_greg_t;
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef double elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch elfn32_check_arch
+
+#define TASK32_SIZE		0x7fff8000UL
+#undef ELF_ET_DYN_BASE
+#define ELF_ET_DYN_BASE		(TASK32_SIZE / 3 * 2)
+
+#include <asm/processor.h>
+#include <linux/elfcore.h>
+#include <linux/compat.h>
+#include <linux/math64.h>
+
+#define elf_prstatus elf_prstatus32
+struct elf_prstatus32
+{
+	struct elf_siginfo pr_info;	/* Info associated with signal */
+	short	pr_cursig;		/* Current signal */
+	unsigned int pr_sigpend;	/* Set of pending signals */
+	unsigned int pr_sighold;	/* Set of held signals */
+	pid_t	pr_pid;
+	pid_t	pr_ppid;
+	pid_t	pr_pgrp;
+	pid_t	pr_sid;
+	struct compat_timeval pr_utime; /* User time */
+	struct compat_timeval pr_stime; /* System time */
+	struct compat_timeval pr_cutime;/* Cumulative user time */
+	struct compat_timeval pr_cstime;/* Cumulative system time */
+	elf_gregset_t pr_reg;	/* GP registers */
+	int pr_fpvalid;		/* True if math co-processor being used.  */
+};
+
+#define elf_prpsinfo elf_prpsinfo32
+struct elf_prpsinfo32
+{
+	char	pr_state;	/* numeric process state */
+	char	pr_sname;	/* char for pr_state */
+	char	pr_zomb;	/* zombie */
+	char	pr_nice;	/* nice val */
+	unsigned int pr_flag;	/* flags */
+	__kernel_uid_t	pr_uid;
+	__kernel_gid_t	pr_gid;
+	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
+	/* Lots missing */
+	char	pr_fname[16];	/* filename of executable */
+	char	pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
+};
+
+#define elf_caddr_t	u32
+#define init_elf_binfmt init_elfn32_binfmt
+
+#define jiffies_to_timeval jiffies_to_compat_timeval
+static __inline__ void
+jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
+{
+	/*
+	 * Convert jiffies to nanoseconds and separate with
+	 * one divide.
+	 */
+	u64 nsec = (u64)jiffies * TICK_NSEC;
+	u32 rem;
+	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
+	value->tv_usec = rem / NSEC_PER_USEC;
+}
+
+#define ELF_CORE_EFLAGS EF_MIPS_ABI2
+
+#undef TASK_SIZE
+#define TASK_SIZE TASK_SIZE32
+
+#undef ns_to_timeval
+#define ns_to_timeval ns_to_compat_timeval
+
+#include "../../../fs/binfmt_elf.c"