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EnableGop: Use patched GenSec to produce compressed .ffs which legacy Mac firmware can read

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This commit is contained in:
Mike Beaton 2023-01-29 15:03:40 +00:00
parent f6bf1f2d86
commit 3bd023bb84
2 changed files with 13 additions and 11 deletions
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24
OpenCorePkg.fdf
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@ -83,23 +83,25 @@
!endif
#
# Ideally we would match the compressed layout of DXE drivers in Mac Pro 144.0.0.0.0 firmware,
# as per the commented out lines, but Mac Pro will not load this with standard compression.
# With lines commented out we make a different, non-compressed layout which the Mac Pro will load.
# Uses patched GenSec to support legacy TianoCompress compression, producing an ffs which matches
# those found in legacy Mac firmware.
#
# TODO: Is there a way to make a Tiano-compressed COMPRESS section, as in Mac Pro firmware, using
# EDK-II build tools? If we manually reconstuct one with UEFITool 0.25.1, Mac Pro will load it.
# Removing the wrapping COMPRESS and TIANO sections below gives an uncompressed ffs from non-patched
# tools which Mac legacy firmware can read (at about four times the size of the compressed version).
#
# Note: `GUIDED A31280AD-481E-41B6-95E8-127F4C984779` will make a Tiano compressed GUIDED
# section, but this is different and 144.0.0.0.0 will not load it.
# Using standard (PI_STD) COMPRESS produces a compressed ffs which legacy Mac firmware cannot read.
#
# Note: `GUIDED A31280AD-481E-41B6-95E8-127F4C984779` with standard tools makes a Tiano compressed
# GUIDED section, but this is different from a Tiano compressed COMPRESS section and legacy Mac
# firmware also cannot read it.
#
[Rule.Common.DXE_DRIVER]
FILE DRIVER = $(NAMED_GUID) Checksum {
# COMPRESS {
# GUIDED {
COMPRESS TIANO {
GUIDED {
DXE_DEPEX DXE_DEPEX Optional $(INF_OUTPUT)/$(MODULE_NAME).depex
PE32 PE32 $(INF_OUTPUT)/$(MODULE_NAME).efi
UI STRING="$(MODULE_NAME)" Optional
# }
# }
}
}
}

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Staging/EnableGop/UEFITool_Inserted_Screenshot.png
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