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ipxe/src/arch/i386/prefix/nbiprefix.S

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Added .nbi as a format.
2007-03-11 00:57:26 +00:00
.text
.arch i386
.code16
[i386] Add explicit flags and type on all .section declarations Try to avoid future problems caused by implicit section flags and/or type information by instituting a policy that all .section declarations must explicitly state the flags and type. Most of this change was achieved using perl -pi \ -e 's/".text"$/".text", "ax", \@progbits/ ; ' \ -e 's/".text16"$/".text16", "ax", \@progbits/ ; ' \ -e 's/".text16.null"$/".text16.null", "ax", \@progbits/ ; ' \ -e 's/".text16.data"$/".text16.data", "aw", \@progbits/ ; ' \ -e 's/".data"$/".data", "aw", \@progbits/ ; ' \ -e 's/".data16"$/".data16", "aw", \@progbits/ ; ' \ -e 's/".bss"$/".bss", "aw", \@nobits/ ; ' \ -e 's/".bss16"$/".bss16", "aw", \@nobits/ ; ' \ -e 's/".prefix"$/".prefix", "ax", \@progbits/ ; ' \ -e 's/".prefix.lib"$/".prefix.lib", "awx", \@progbits/ ; ' \ -e 's/".prefix.data"$/".prefix.data", "aw", \@progbits/ ; ' \ -e 's/".weak"$/".weak", "a", \@nobits/ ; ' \ `git grep -l '\.section'`
2009-02-15 10:54:52 +00:00
.section ".prefix", "ax", @progbits
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
.org 0
nbi_header:
/*****************************************************************************
* NBI file header
*****************************************************************************
*/
file_header:
.long 0x1b031336 /* Signature */
.byte 0x04 /* 16 bytes header, no vendor info */
.byte 0
.byte 0
.byte 0 /* No flags */
.word 0x0000, 0x07c0 /* Load header to 0x07c0:0x0000 */
[build] Use unique entry symbols for each prefix Some binutils versions will drag in an object to satisfy the entry symbol; some won't. Try to cope with this exciting variety of behaviour by ensuring that all entry symbols are unique. Remove the explicit inclusion of the prefix object on the linker command line, since the entry symbol now provides all the information needed to identify the prefix. Signed-off-by: Michael Brown <mcb30@ipxe.org>
2011-02-23 21:12:56 +00:00
.word _nbi_start, 0x07c0 /* Start execution at 0x07c0:entry */
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
.size file_header, . - file_header
/*****************************************************************************
* NBI segment header
*****************************************************************************
*/
segment_header:
.byte 0x04 /* 16 bytes header, no vendor info */
.byte 0
.byte 0
.byte 0x04 /* Last segment */
.long 0x00007e00
[zbin] Change fixup semantics to support ROMs over 128k uncompressed The option ROM header contains a one-byte field indicating the number of 512-byte sectors in the ROM image. Currently it is linked to contain the number of uncompressed sectors, with an instruction to the compressor to correct it. This causes link failure when the uncompressed size of the ROM image is over 128k. Fix by replacing the SUBx compressor fixup with an ADDx fixup that adds the total compressed output length, scaled as requested, to an addend stored in the field where the final length value will be placed. This is similar to the behavior of ELF relocations, and ensures that an overflow error will not be generated unless the compressed size is still too large for the field. This also allows us to do away with the _filesz_pgh and _filesz_sect calculations exported by the linker script. Output tested bitwise identical to the old SUBx mechanism on hd, dsk, lkrn, and rom prefixes, on both 32-bit and 64-bit processors. Modified-by: Michael Brown <mcb30@etherboot.org> Signed-off-by: Michael Brown <mcb30@etherboot.org>
2009-08-09 22:12:21 -07:00
imglen: .long -512
memlen: .long -512
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
.size segment_header, . - segment_header
[build] Fix building on Ubuntu 8.04 Not fully understood, but it seems that the LMA of bss sections matters for some newer binutils builds. Force all bss sections to have an LMA at the end of the file, so that they don't interfere with other sections. The symptom was that objcopy -O binary -j .zinfo would extract the .zinfo section from bin/xxx.tmp as a blob of the correct length, but with zero contents. This would then cause the [ZBIN] stage of the build to fail. Also explicitly state that .zinfo(.*) sections have @progbits, in case some future assembler or linker variant decides to omit them.
2008-10-16 20:39:48 -04:00
.section ".zinfo.fixup", "a", @progbits /* Compressor fixups */
[zbin] Change fixup semantics to support ROMs over 128k uncompressed The option ROM header contains a one-byte field indicating the number of 512-byte sectors in the ROM image. Currently it is linked to contain the number of uncompressed sectors, with an instruction to the compressor to correct it. This causes link failure when the uncompressed size of the ROM image is over 128k. Fix by replacing the SUBx compressor fixup with an ADDx fixup that adds the total compressed output length, scaled as requested, to an addend stored in the field where the final length value will be placed. This is similar to the behavior of ELF relocations, and ensures that an overflow error will not be generated unless the compressed size is still too large for the field. This also allows us to do away with the _filesz_pgh and _filesz_sect calculations exported by the linker script. Output tested bitwise identical to the old SUBx mechanism on hd, dsk, lkrn, and rom prefixes, on both 32-bit and 64-bit processors. Modified-by: Michael Brown <mcb30@etherboot.org> Signed-off-by: Michael Brown <mcb30@etherboot.org>
2009-08-09 22:12:21 -07:00
.ascii "ADDL"
Update all prefixes currently referring to _load_size to include a compressor fixup section.
2007-07-16 17:17:26 +01:00
.long imglen
.long 1
.long 0
[zbin] Change fixup semantics to support ROMs over 128k uncompressed The option ROM header contains a one-byte field indicating the number of 512-byte sectors in the ROM image. Currently it is linked to contain the number of uncompressed sectors, with an instruction to the compressor to correct it. This causes link failure when the uncompressed size of the ROM image is over 128k. Fix by replacing the SUBx compressor fixup with an ADDx fixup that adds the total compressed output length, scaled as requested, to an addend stored in the field where the final length value will be placed. This is similar to the behavior of ELF relocations, and ensures that an overflow error will not be generated unless the compressed size is still too large for the field. This also allows us to do away with the _filesz_pgh and _filesz_sect calculations exported by the linker script. Output tested bitwise identical to the old SUBx mechanism on hd, dsk, lkrn, and rom prefixes, on both 32-bit and 64-bit processors. Modified-by: Michael Brown <mcb30@etherboot.org> Signed-off-by: Michael Brown <mcb30@etherboot.org>
2009-08-09 22:12:21 -07:00
.ascii "ADDL"
Update all prefixes currently referring to _load_size to include a compressor fixup section.
2007-07-16 17:17:26 +01:00
.long memlen
.long 1
.long 0
.previous
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
/*****************************************************************************
* NBI entry point
*****************************************************************************
*/
[build] Use unique entry symbols for each prefix Some binutils versions will drag in an object to satisfy the entry symbol; some won't. Try to cope with this exciting variety of behaviour by ensuring that all entry symbols are unique. Remove the explicit inclusion of the prefix object on the linker command line, since the entry symbol now provides all the information needed to identify the prefix. Signed-off-by: Michael Brown <mcb30@ipxe.org>
2011-02-23 21:12:56 +00:00
.globl _nbi_start
_nbi_start:
[build] Rename gPXE to iPXE Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
2010-04-19 20:16:01 +01:00
/* Install iPXE */
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
call install
[nbiprefix] Set up real-mode stack before jumping to .text16 Signed-off-by: Michael Brown <mcb30@ipxe.org>
2013-03-08 13:23:58 +00:00
/* Set up real-mode stack */
movw %bx, %ss
movw $_estack16, %sp
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
/* Jump to .text16 segment */
pushw %ax
pushw $1f
lret
.section ".text16", "awx", @progbits
1:
pushl $main
pushw %cs
call prot_call
[i386] Free allocated base memory on exit, if possible Code paths that automatically allocate memory from the FBMS at 40:13 should also free it, if possible. Freeing this memory will not be possible if either 1. The FBMS has been modified since our allocation, or 2. We have not been able to unhook one or more BIOS interrupt vectors.
2008-11-18 19:43:13 +00:00
popl %ecx /* discard */
[build] Rename gPXE to iPXE Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
2010-04-19 20:16:01 +01:00
/* Uninstall iPXE */
[i386] Free allocated base memory on exit, if possible Code paths that automatically allocate memory from the FBMS at 40:13 should also free it, if possible. Freeing this memory will not be possible if either 1. The FBMS has been modified since our allocation, or 2. We have not been able to unhook one or more BIOS interrupt vectors.
2008-11-18 19:43:13 +00:00
call uninstall
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
/* Reboot system */
int $0x19
.previous
[build] Fix building with latest binutils Signed-off-by: Bastian Blank <waldi@debian.org> Signed-off-by: Michael Brown <mcb30@ipxe.org>
2011-03-16 15:44:33 +01:00
.size _nbi_start, . - _nbi_start
Added .nbi as a format.
2007-03-11 00:57:26 +00:00
nbi_header_end:
.org 512
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