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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 14:26:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 14:26:58 -0700
commit84d69848c97faab0c25aa2667b273404d2e2a64a (patch)
tree594f3fe1b271b5255a1c5281e36f8bf938acd1c0 /Documentation/kbuild
parentd4d24d2d0a7ea3b62efd7336bfc2344e29b36bc5 (diff)
parent590abbdd273304b55824bcb9ea91840ea375575d (diff)
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek: - EXPORT_SYMBOL for asm source by Al Viro. This does bring a regression, because genksyms no longer generates checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is working on a patch to fix this. Plus, we are talking about functions like strcpy(), which rarely change prototypes. - Fixes for PPC fallout of the above by Stephen Rothwell and Nick Piggin - fixdep speedup by Alexey Dobriyan. - preparatory work by Nick Piggin to allow architectures to build with -ffunction-sections, -fdata-sections and --gc-sections - CONFIG_THIN_ARCHIVES support by Stephen Rothwell - fix for filenames with colons in the initramfs source by me. * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits) initramfs: Escape colons in depfile ppc: there is no clear_pages to export powerpc/64: whitelist unresolved modversions CRCs kbuild: -ffunction-sections fix for archs with conflicting sections kbuild: add arch specific post-link Makefile kbuild: allow archs to select link dead code/data elimination kbuild: allow architectures to use thin archives instead of ld -r kbuild: Regenerate genksyms lexer kbuild: genksyms fix for typeof handling fixdep: faster CONFIG_ search ia64: move exports to definitions sparc32: debride memcpy.S a bit [sparc] unify 32bit and 64bit string.h sparc: move exports to definitions ppc: move exports to definitions arm: move exports to definitions s390: move exports to definitions m68k: move exports to definitions alpha: move exports to actual definitions x86: move exports to actual definitions ...
Diffstat (limited to 'Documentation/kbuild')
-rw-r--r--Documentation/kbuild/makefiles.txt16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 385a5ef41c17..9b9c4797fc55 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -41,6 +41,7 @@ This document describes the Linux kernel Makefiles.
--- 6.8 Custom kbuild commands
--- 6.9 Preprocessing linker scripts
--- 6.10 Generic header files
+ --- 6.11 Post-link pass
=== 7 Kbuild syntax for exported headers
--- 7.1 header-y
@@ -1237,6 +1238,21 @@ When kbuild executes, the following steps are followed (roughly):
to list the file in the Kbuild file.
See "7.4 generic-y" for further info on syntax etc.
+--- 6.11 Post-link pass
+
+ If the file arch/xxx/Makefile.postlink exists, this makefile
+ will be invoked for post-link objects (vmlinux and modules.ko)
+ for architectures to run post-link passes on. Must also handle
+ the clean target.
+
+ This pass runs after kallsyms generation. If the architecture
+ needs to modify symbol locations, rather than manipulate the
+ kallsyms, it may be easier to add another postlink target for
+ .tmp_vmlinux? targets to be called from link-vmlinux.sh.
+
+ For example, powerpc uses this to check relocation sanity of
+ the linked vmlinux file.
+
=== 7 Kbuild syntax for exported headers
The kernel includes a set of headers that is exported to userspace.