diff options
Diffstat (limited to 'src/securerom')
| -rw-r--r-- | src/securerom/secureromasm.S | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/src/securerom/secureromasm.S b/src/securerom/secureromasm.S index 83dd42358..62b410639 100644 --- a/src/securerom/secureromasm.S +++ b/src/securerom/secureromasm.S @@ -90,28 +90,43 @@ _ROM_verify: # the parameters in the Hostboot C code, we have these helper functions to # provide springboard with the offest to subtract to find the base secureROM # address. + +# NOTE: Originally each of the following helper functions was formatted to +# subtract the starting offset of the calling assembly from r10 like the +# following example: +# li r10, -_SHA512_Init +# b springboard +# However, some tool chain versions do not correctly support this convention, so +# instead put the non-negative offset into r10 and then negate it + remove_sha512_init_offset: - li r10, -_SHA512_Init + li r10, _SHA512_Init + neg r10,r10 b springboard remove_sha512_update_offset: - li r10, -_SHA512_Update + li r10, _SHA512_Update + neg r10,r10 b springboard remove_sha512_final_offset: - li r10, -_SHA512_Final + li r10, _SHA512_Final + neg r10,r10 b springboard remove_sha512_hash_offset: - li r10, -_SHA512_Hash + li r10, _SHA512_Hash + neg r10,r10 b springboard remove_ec_verify_offset: - li r10, -_ec_verify + li r10, _ec_verify + neg r10,r10 b springboard remove_rom_verify_offset: - li r10, -_ROM_verify + li r10, _ROM_verify + neg r10,r10 b springboard springboard: |
