openslx-ng/ipxe.git/src/arch/i386/scripts, branch openslx

[build] Allow for the existence of small-data sections

2025-06-24T13:40:57+00:00

Signed-off-by: Michael Brown

[linux] Centralise the linker script for Linux binaries

2023-01-22T12:38:03+00:00

Reduce duplication between i386 and x86_64 by providing a single shared linker script that both architectures can include. Signed-off-by: Michael Brown

[efi] Include Secure Boot Advanced Targeting (SBAT) metadata

2022-01-13T14:12:44+00:00

SBAT defines an encoding for security generation numbers stored as a CSV file within a special ".sbat" section in the signed binary. If a Secure Boot exploit is discovered then the generation number will be incremented alongside the corresponding fix. Platforms may then record the minimum generation number required for any given product. This allows for an efficient revocation mechanism that consumes minimal flash storage space (in contrast to the DBX mechanism, which allows for only a single-digit number of revocation events to ever take place across all possible signed binaries). Add SBAT metadata to iPXE EFI binaries to support this mechanism. Signed-off-by: Michael Brown

[bios] Add bin-x86_64-pcbios build platform

2016-02-16T19:32:32+00:00

Move most arch/i386 files to arch/x86, and adjust the contents of the Makefiles and the include/bits/*.h headers to reflect the new locations. This patch makes no substantive code changes, as can be seen using a rename-aware diff (e.g. "git show -M5"). This patch does not make the pcbios platform functional for x86_64; it merely allows it to compile without errors. Signed-off-by: Michael Brown

[prefix] Pad .text16 and .data16 segment sizes at build time

2016-02-12T14:04:51+00:00

Commit c64747d ("[librm] Speed up real-to-protected mode transition under KVM") rounded down the .text16 segment address calculated in alloc_basemem() to a multiple of 64 bytes in order to speed up mode transitions under KVM. This creates a potential discrepancy between alloc_basemem() and free_basemem(), meaning that free_basemem() may free less memory than was allocated by alloc_basemem(). Fix by padding the calculated sizes of both .text16 and .data16 to a multiple of 64 bytes at build time. Debugged-by: Yossef Efraim Signed-off-by: Michael Brown

[build] Allow building PCI ROMs with device ID lists

2015-04-15T11:20:06+00:00

PCI v3.0 supports a "device list" which allows the ROM to claim support for multiple PCI device IDs (but only a single vendor ID). Add support for building such ROMs by scanning the build target element list and incorporating any device IDs into the ROM's device list header. For example: make bin/8086153a--8086153b.mrom would build a ROM claiming support for both 8086:153a and 8086:153b. Signed-off-by: Michael Brown

[prefix] Use .bss16 as temporary stack space for calls to install_block

2015-02-24T16:33:14+00:00

Some decompression algorithms (e.g. LZMA) require large amounts of temporary stack space, which may not be made available by all prefixes. Use .bss16 as a temporary stack for the duration of the calls to install_block (switching back to the external stack before we start making calls into code which might access variables in .bss16), and allow the decompressor to define a global symbol to force a minimum value on the size of .bss16. Signed-off-by: Michael Brown

[build] Fix %.licence build target

2013-07-15T22:50:54+00:00

Our use of --gc-sections causes the linker to discard the symbols defined by FILE_LICENCE(), meaning that the resulting licence determination is incomplete. We must use the KEEP() directive in the linker script to force the linker to not discard the licence symbols. Using KEEP(*(COMMON)) would be undesirable, since there are some symbols in COMMON which we may wish to discard. Fix by placing symbols defined by PROVIDE_SYMBOL() (which is used by FILE_LICENCE()) into a special ".provided" section, which we then mark with KEEP(). All such symbols are zero-length, so there is no cost in terms of the final binary size. Since the symbols are no longer in COMMON, the linker will reject symbols with the same name coming from multiple objects. We therefore append the object name to the licence symbol, to ensure that it is unique. Reported-by: Marin Hannache Signed-off-by: Michael Brown

[romprefix] Add a dummy ROM header to cover the .mrom payload

2012-06-12T14:15:03+00:00

The header of a .mrom image declares its length to be only a few kilobytes; the remainder is accessed via a sideband mechanism. This makes it difficult to append an additional ROM image, such as an EFI ROM. Add a second, dummy ROM header covering the payload portion of the .mrom image, allowing consumers to locate any appended ROM images in the usual way. Signed-off-by: Michael Brown

[build] Fix building on mildly deranged versions of binutils

2011-04-29T00:27:36+00:00

Some versions of binutils have curious concepts of what constitutes subtraction. For example: 0x00000000000000f0 _text16_late = . 0x0000000000000898 _mtext16 = . 0x0000000000000898 _etext16 = . 0x0000000000000898 _text16_late_filesz = ABSOLUTE ((_mtext16 - _text16_late)) 0x00000000000007a8 _text16_late_memsz = ABSOLUTE ((_etext16 - _text16_late)) This has interesting side-effects such as producing sizes for .bss segments that are negative, causing the majority of addressable memory to be zeroed out. Fix by using the form ABSOLUTE ( x ) - ABSOLUTE ( y ) rather than ABSOLUTE ( x - y ) Reported-by: H. Peter Anvin Suggested-by: H. Peter Anvin Tested-by: H. Peter Anvin Signed-off-by: Michael Brown