Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable

handler in the kernel at the same time.  Also, allow for the
exec_new_vmspace() code to build a different sized vmspace depending on
the executable environment.  This is a big help for execing i386 binaries
on ia64.   The ELF exec code grows the ability to map partial pages when
there is a page size difference, eg: emulating 4K pages on 8K or 16K
hardware pages.

Flesh out the i386 emulation support for ia64.  At this point, the only
binary that I know of that fails is cvsup, because the cvsup runtime
tries to execute code in pages not marked executable.

Obtained from:  dfr (mostly, many tweaks from me).

1 files changed, 39 insertions, 1 deletions

diff --git a/sys/powerpc/powerpc/elf_machdep.c b/sys/powerpc/powerpc/elf_machdep.c
index 3a39ac6..369af53 100644
--- a/sys/powerpc/powerpc/elf_machdep.c
+++ b/sys/powerpc/powerpc/elf_machdep.c
@@ -32,9 +32,47 @@
 #include <sys/proc.h>
 #include <sys/namei.h>
 #include <sys/fcntl.h>
+#include <sys/sysent.h>
+#include <sys/imgact_elf.h>
+#include <sys/syscall.h>
+#include <sys/signalvar.h>
 #include <sys/vnode.h>
 #include <sys/linker.h>
 #include <machine/elf.h>
+#include <machine/md_var.h>
+
+struct sysentvec elf32_freebsd_sysvec = {
+	SYS_MAXSYSCALL,
+	sysent,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	elf32_freebsd_fixup,
+	sendsig,
+	sigcode,
+	&szsigcode,
+	0,
+	"FreeBSD ELF32",
+	__elfN(coredump),
+	NULL,
+	MINSIGSTKSZ
+};
+
+static Elf32_Brandinfo freebsd_brand_info = {
+						ELFOSABI_FREEBSD,
+						EM_PPC,
+						"FreeBSD",
+						"",
+						"/usr/libexec/ld-elf.so.1",
+						&elf32_freebsd_sysvec
+					  };
+
+SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_ANY,
+	(sysinit_cfunc_t) elf32_insert_brand_entry,
+	&freebsd_brand_info);
 
 /* Process one elf relocation with addend. */
 int
@@ -76,7 +114,7 @@ elf_reloc(linker_file_t lf, const void *data, int type)
 			addr = elf_lookup(lf, symidx, 1);
 			if (addr == 0)
 				return -1;
-                        addr += addend;
+			addr += addend;
 			if (*where != addr)
 				*where = addr;
 			break;