arch/alpha/Makefile, ld -N, bootp

Pete Wyckoff (pw@dancer.ca.sandia.gov)
Fri, 4 Sep 1998 17:23:54 -0700

It looks like there was a code cleanup of much arch/alpha stuff for
patch 2.1.116. One of these changes added "-N" to the LINKFLAGS used
for putting vmlinux together. With this option, the linker does not
page-align the segments in the file. The old way, without the "-N"
flag, sticks a bunch of zeroes in vmlinux whenever the loader map
specifies an alignment (like the 8k around the init sections).

Creating a "bootpfile" and using bootp to ship that across I find the
initial jump into start_kernel (init/main.c) from __start (arch/alpha/
kernel/head.S) misses since the GOT tables are not where they should be
in memory.

Having removed the "-N", though, my kernels grow in size about 80kB
(on 2.5MB). Hopefully everybody will be willing to suffer this to allow
bootp to work? I apply the following patch now to a stock 2.1.119.

-- Pete

su2sn% diff -ru linux/arch/alpha/Makefile{.orig,}
--- linux/arch/alpha/Makefile.orig Sun Aug 9 12:09:05 1998
+++ linux/arch/alpha/Makefile Fri Sep 4 17:07:14 1998
@@ -10,7 +10,8 @@

NM := nm -B

-LINKFLAGS = -static -T arch/alpha/vmlinux.lds -N
+# removed -N else sections aren't aligned in file, and bootp fails --pw
+LINKFLAGS = -static -T arch/alpha/vmlinux.lds
CFLAGS := $(CFLAGS) -pipe -mno-fp-regs -ffixed-8

# Determine if we can use the BWX instructions with GAS.
---------------------------------------------
Pete Wyckoff | wyckoff@ca.sandia.gov
Sandia National Labs | 925 294 3503 (voice)
MS 9011, P.O. Box 969 | 925 294 1225 (fax)
Livermore, CA 94551 |

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