rmodtool: add support for ARM
Add support for creating ARM rmodules. There are 3 expected
relocations for an ARM rmodule:
- R_ARM_ABS32
- R_ARM_THM_PC22
- R_ARM_THM_JUMP24
R_ARM_ABS32 is the only type that needs to emitted for relocation
as the other 2 are relative relocations.
BUG=chrome-os-partner:27094
BRANCH=None
TEST=Built vbootstub for ARM device.
Original-Change-Id: I0c22d4abca970e82ccd60b33fed700b96e3e52fb
Original-Signed-off-by: Aaron Durbin <adurbin@chromuim.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/190922
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit a642102ba7ace5c1829abe7732199eda6646950a)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ib3b3c90ebb672d8d6a537df896b97dc82c6186cc
Reviewed-on: http://review.coreboot.org/7204
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
diff --git a/util/cbfstool/rmodule.c b/util/cbfstool/rmodule.c
index 168d71a..966c364 100644
--- a/util/cbfstool/rmodule.c
+++ b/util/cbfstool/rmodule.c
@@ -82,12 +82,38 @@
return (type == R_386_32);
}
+static int valid_reloc_arm(struct rmod_context *ctx, Elf64_Rela *rel)
+{
+ int type;
+
+ type = ELF64_R_TYPE(rel->r_info);
+
+ /* Only these 3 relocations are expected to be found. */
+ return (type == R_ARM_ABS32 || type == R_ARM_THM_PC22 ||
+ type == R_ARM_THM_JUMP24);
+}
+
+static int should_emit_arm(struct rmod_context *ctx, Elf64_Rela *rel)
+{
+ int type;
+
+ type = ELF64_R_TYPE(rel->r_info);
+
+ /* R_ARM_ABS32 relocations are absolute. Must emit these. */
+ return (type == R_ARM_ABS32);
+}
+
static struct arch_ops reloc_ops[] = {
{
.arch = EM_386,
.valid_type = valid_reloc_386,
.should_emit = should_emit_386,
},
+ {
+ .arch = EM_ARM,
+ .valid_type = valid_reloc_arm,
+ .should_emit = should_emit_arm,
+ },
};
/*