Alexandre Oliva writes:

This patch adds code to uClibc to support a new ABI designed for the
FR-V architecture, that enables text segments of executables and
shared libraries to be shared by multiple processes on an OS such as
uClinux, that can run on FR-V processors without an MMU.

Patches for binutils and GCC have just been posted in the
corresponding mailing lists.  The binutils patch was approved,
but there's one additional patch pending review, that I posted
this week.  An updated GCC patch will be posted to
gcc-patches@gcc.gnu.org as soon as I complete testing (I used a
known-good compiler to test the uClibc patch below).

Since the existing dynamic loader code didn't support independent
relocation of segments, it required changes that were somewhat
extensive.  I've added a number of new machine-specific macros to try
to keep the platform and ABI-specific details outside the generic
code.  I hope this is not a problem.

1 files changed, 57 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/frv/bits/kernel_stat.h b/libc/sysdeps/linux/frv/bits/kernel_stat.h
new file mode 100644
index 000000000..c6fc95328
--- /dev/null
+++ b/libc/sysdeps/linux/frv/bits/kernel_stat.h
@@ -0,0 +1,57 @@
+#ifndef _BITS_STAT_STRUCT_H
+#define _BITS_STAT_STRUCT_H
+
+/* This file provides whatever this particular arch's kernel thinks 
+ * struct kernel_stat should look like...  It turns out each arch has a 
+ * different opinion on the subject... */
+
+struct kernel_stat {
+	unsigned short st_dev;
+	unsigned short __pad1;
+	unsigned long st_ino;
+	unsigned short st_mode;
+	unsigned short st_nlink;
+	unsigned short st_uid;
+	unsigned short st_gid;
+	unsigned short st_rdev;
+	unsigned short __pad2;
+	unsigned long  st_size;
+	unsigned long  st_blksize;
+	unsigned long  st_blocks;
+	unsigned long  st_atime;
+	unsigned long  __unused1;
+	unsigned long  st_mtime;
+	unsigned long  __unused2;
+	unsigned long  st_ctime;
+	unsigned long  __unused3;
+	unsigned long  __unused4;
+	unsigned long  __unused5;
+};
+
+struct kernel_stat64 {
+	unsigned char	__pad0[6];
+	unsigned short	st_dev;
+	unsigned char	__pad1[2];
+#define _HAVE_STAT64___ST_INO
+	unsigned long	__st_ino;
+	unsigned int	st_mode;
+	unsigned int	st_nlink;
+	unsigned long	st_uid;
+	unsigned long	st_gid;
+	unsigned char	__pad2[6];
+	unsigned short	st_rdev;
+	unsigned char	__pad3[2];
+	long long	st_size;
+	unsigned long	st_blksize;
+	unsigned long	__pad4;		/* future possible st_blocks high bits */
+	unsigned long	st_blocks;	/* Number 512-byte blocks allocated. */
+	unsigned long	st_atime;
+	unsigned long	__pad5;
+	unsigned long	st_mtime;
+	unsigned long	__pad6;
+	unsigned long	st_ctime;
+	unsigned long	__pad7;		/* will be high 32 bits of ctime someday */
+	unsigned long long	st_ino;
+};
+
+#endif	/*  _BITS_STAT_STRUCT_H */