diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2012-12-24 14:28:37 -0600 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-03-18 18:40:34 +0100 |
| commit | ad93552b86579afd29e99da1b2fcacb0d872cd1a (patch) | |
| tree | 55a91404826f8c9e94ad2544295b94a981eb2fd6 /src/Kconfig | |
| parent | 21efd8c0378a8a42ee2fd71957be318416b6f5af (diff) | |
lib: add rmodule support
A rmodule is short for relocation module. Relocaiton modules are
standalone programs. These programs are linked at address 0 as a shared
object with a special linker script that maintains the relocation
entries for the object. These modules can then be embedded as a raw
binary (objcopy -O binary) to be loaded at any location desired.
Initially, the only arch support is for x86. All comments below apply to
x86 specific properties.
The intial user of this support would be for SMM handlers since those
handlers sometimes need to be located at a dynamic address (e.g. TSEG
region).
The relocation entries are currently Elf32_Rel. They are 8 bytes large,
and the entries are not necessarily in sorted order. An future
optimization would be to have a tool convert the unsorted relocations
into just sorted offsets. This would reduce the size of the blob
produced after being processed. Essentialy, 8 bytes per relocation meta
entry would reduce to 4 bytes.
Change-Id: I2236dcb66e9d2b494ce2d1ae40777c62429057ef
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2692
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/Kconfig')
| -rw-r--r-- | src/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/Kconfig b/src/Kconfig index 3e249679b8..7206878b28 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -357,6 +357,14 @@ config GFXUMA help Enable Unified Memory Architecture for graphics. +config RELOCATABLE_MODULES + bool "Relocatable Modules" + default n + help + If RELOCATABLE_MODULES is selected then support is enabled for + building relocatable modules in the ram stage. Those modules can be + loaded anywhere and all the relocations are handled automatically. + config HAVE_ACPI_TABLES bool help |