diff options
| -rw-r--r-- | pc-bios/linuxboot_dma.bin | bin | 1024 -> 1536 bytes | |||
| -rw-r--r-- | pc-bios/optionrom/linuxboot_dma.c | 8 | ||||
| -rw-r--r-- | scripts/signrom.py | 27 |
3 files changed, 17 insertions, 18 deletions
diff --git a/pc-bios/linuxboot_dma.bin b/pc-bios/linuxboot_dma.bin Binary files differindex e1f623a124..238a195d38 100644 --- a/pc-bios/linuxboot_dma.bin +++ b/pc-bios/linuxboot_dma.bin diff --git a/pc-bios/optionrom/linuxboot_dma.c b/pc-bios/optionrom/linuxboot_dma.c index 8509b287ba..7549797732 100644 --- a/pc-bios/optionrom/linuxboot_dma.c +++ b/pc-bios/optionrom/linuxboot_dma.c @@ -25,7 +25,7 @@ asm( ".global _start\n" "_start:\n" " .short 0xaa55\n" -" .byte 0\n" /* size in 512 units, filled in by signrom.py */ +" .byte 3\n" /* desired size in 512 units; signrom.py adds padding */ " .byte 0xcb\n" /* far return without prefix */ " .org 0x18\n" " .short 0\n" @@ -157,7 +157,11 @@ static inline uint32_t be32_to_cpu(uint32_t x) return bswap32(x); } -static void bios_cfg_read_entry(void *buf, uint16_t entry, uint32_t len) +/* clang is happy to inline this function, and bloats the + * ROM. + */ +static __attribute__((__noinline__)) +void bios_cfg_read_entry(void *buf, uint16_t entry, uint32_t len) { FWCfgDmaAccess access; uint32_t control = (entry << 16) | BIOS_CFG_DMA_CTL_SELECT diff --git a/scripts/signrom.py b/scripts/signrom.py index 5629bca222..d1dabe0240 100644 --- a/scripts/signrom.py +++ b/scripts/signrom.py @@ -23,26 +23,21 @@ if magic != '\x55\xaa': size_byte = ord(fin.read(1)) fin.seek(0) +data = fin.read() -if size_byte == 0: - # If the caller left the size field blank then we will fill it in, - # also rounding the whole input to a multiple of 512 bytes. - data = fin.read() - # +1 because we need a byte to store the checksum. - size = len(data) + 1 - # Round up to next multiple of 512. - size += 511 - size -= size % 512 - if size >= 65536: - sys.exit("%s: option ROM size too large" % sys.argv[1]) +size = size_byte * 512 +if len(data) > size: + sys.stderr.write('error: ROM is too large (%d > %d)\n' % (len(data), size)) + sys.exit(1) +elif len(data) < size: + # Add padding if necessary, rounding the whole input to a multiple of + # 512 bytes according to the third byte of the input. # size-1 because a final byte is added below to store the checksum. data = data.ljust(size-1, '\0') - data = data[:2] + chr(size/512) + data[3:] else: - # Otherwise the input file specifies the size so use it. - # -1 because we overwrite the last byte of the file with the checksum. - size = size_byte * 512 - 1 - data = fin.read(size) + if ord(data[-1:]) != 0: + sys.stderr.write('WARNING: ROM includes nonzero checksum\n') + data = data[:size-1] fout.write(data) |