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* [profile] Standardise return type of profile_timestamp()Michael Brown2024-09-241-3/+3
| | | | | | | | | | | | | | | | All consumers of profile_timestamp() currently treat the value as an unsigned long. Only the elapsed number of ticks is ever relevant: the absolute value of the timestamp is not used. Profiling is used to measure short durations that are generally fewer than a million CPU cycles, for which an unsigned long is easily large enough. Standardise the return type of profile_timestamp() as unsigned long across all CPU architectures. This allows 32-bit architectures such as i386 and riscv32 to omit all logic associated with retrieving the upper 32 bits of the 64-bit hardware counter, which simplifies the code and allows riscv32 and riscv64 to share the same implementation. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [libc] Centralise architecture-independent portions of setjmp.hMichael Brown2024-09-121-0/+24
| | | | | | | | | | | The definitions of the setjmp() and longjmp() functions are common to all architectures, with only the definition of the jump buffer structure being architecture-specific. Move the architecture-specific portions to bits/setjmp.h and provide a common setjmp.h for the function definitions. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [gdb] Allow CPU architectures to omit support for GDBMichael Brown2024-09-051-0/+72
| | | | | | | | Move the <gdbmach.h> file to <bits/gdbmach.h>, and provide a common dummy implementation for all architectures that have not yet implemented support for GDB. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Allow for per-architecture unprefixed constant operand modifierMichael Brown2023-02-061-0/+3
| | | | | | | | | | | | | | | | | | Over the years, the undocumented operand modifier used to produce the unprefixed constant values in __einfo_error() has varied from "%c0" to "%a0" in commit 1a77466 ("[build] Fix use of inline assembly on GCC 4.8 ARM64 builds") and back to "%c0" in commit 3fb3ffc ("[build] Fix use of inline assembly on GCC 8 ARM64 builds"), according to the evolving demands of the toolchain. LoongArch64 suffers from a similar issue: GCC 13 will allow either, but the currently released GCC 12 allows only the "%a0" form. Introduce a macro ASM_NO_PREFIX, defined in bits/compiler.h, to abstract away this difference and allow different architectures to use different operand modifiers. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Allow __asmcall to be used as a type attributeMichael Brown2021-03-021-1/+1
| | | | | | | | | | | The "used" attribute can be applied only to functions or variables, which prevents the use of __asmcall as a type attribute. Fix by removing "used" from the definition of __asmcall for i386 and x86_64 architectures, and adding explicit __used annotations where necessary. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Use host glibc system call wrappersMichael Brown2021-03-011-6/+0Star
| | | | | | | | | | | | | | | | | | | | | | When building as a Linux userspace application, iPXE currently implements its own system calls to the host kernel rather than relying on the host's C library. The output binary is statically linked and has no external dependencies. This matches the general philosophy of other platforms on which iPXE runs, since there are no external libraries available on either BIOS or UEFI bare metal. However, it would be useful for the Linux userspace application to be able to link against host libraries such as libslirp. Modify the build process to perform a two-stage link: first picking out the requested objects in the usual way from blib.a but with relocations left present, then linking again with a helper object to create a standard hosted application. The helper object provides the standard main() entry point and wrappers for the Linux system calls required by the iPXE Linux drivers and interface code. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [hyperv] Use generic set_bit() functionMichael Brown2016-03-161-23/+0Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [librm] Provide an abstraction wrapper for prot_callMichael Brown2016-02-191-1/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [bios] Add bin-x86_64-pcbios build platformMichael Brown2016-02-169-128/+0Star
| | | | | | | | | | | | | | 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 <mcb30@ipxe.org>
* [libc] Add ffs(), ffsl(), and ffsll()Michael Brown2015-03-161-1/+45
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Fix the REQUIRE_SYMBOL mechanismMichael Brown2015-03-051-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | At some point in the past few years, binutils became more aggressive at removing unused symbols. To function as a symbol requirement, a relocation record must now be in a section marked with @progbits and must not be in a section which gets discarded during the link (either via --gc-sections or via /DISCARD/). Update REQUIRE_SYMBOL() to generate relocation records meeting these criteria. To minimise the impact upon the final binary size, we use existing symbols (specified via the REQUIRING_SYMBOL() macro) as the relocation targets where possible. We use R_386_NONE or R_X86_64_NONE relocation types to prevent any actual unwanted relocation taking place. Where no suitable symbol exists for REQUIRING_SYMBOL() (such as in config.c), the macro PROVIDE_REQUIRING_SYMBOL() can be used to generate a one-byte-long symbol to act as the relocation target. If there are versions of binutils for which this approach fails, then the fallback will probably involve killing off REQUEST_SYMBOL(), redefining REQUIRE_SYMBOL() to use the current definition of REQUEST_SYMBOL(), and postprocessing the linked ELF file with something along the lines of "nm -u | wc -l" to check that there are no undefined symbols remaining. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [libc] Rewrite byte-swapping codeMichael Brown2015-03-021-8/+0Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Relicense files under GPL2_OR_LATER_OR_UBDLMichael Brown2015-03-022-2/+2
| | | | | | | | | | These files cannot be automatically relicensed by util/relicense.pl since they either contain unusual but trivial contributions (such as the addition of __nonnull function attributes), or contain lines dating back to the initial git revision (and so require manual knowledge of the code's origin). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Relicense files under GPL2_OR_LATER_OR_UBDLMichael Brown2015-03-0213-13/+13
| | | | | | | Relicense files for which I am the sole author (as identified by util/relicense.pl). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [hyperv] Add support for Hyper-V hypervisorMichael Brown2014-12-181-0/+72
| | | | | | | Add support for detecting and communicating with the Hyper-V hypervisor. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [profile] Add generic profiling infrastructureMichael Brown2014-04-281-0/+28
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [libc] Add flsll()Michael Brown2014-04-271-0/+50
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Fix __libgcc attribute for recent gcc versionsMichael Brown2014-04-251-0/+11
| | | | | | | | | | | | | | | | | | We observed some time ago (in commit 4ce8d61 "Import various libgcc functions from syslinux") that gcc seems to treat calls to the implicit arithmetic functions (e.g. __udivdi3()) as being affected by -mregparm but unaffected by -mrtd. This seems to be no longer the case with current gcc versions, which treat calls to these functions as being affected by both -mregparm and -mrtd, as expected. There is nothing obvious in the gcc changelogs to indicate precisely when this happened. From experimentation with available gcc versions, the change occurred sometime between v4.6.3 and v4.7.2. We assume that only versions up to v4.6.x require the special treatment. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [efi] Add "reboot" command for EFIMichael Brown2013-03-221-0/+14
| | | | | | | | | Abstract out the ability to reboot the system to a separate reboot() function (with platform-specific implementations), add an EFI implementation, and make the existing "reboot" command available under EFI. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Avoid strict-aliasing warning for gcc 4.3Bo Yang2013-03-211-2/+2
| | | | | Signed-off-by: Bo Yang <boyang@suse.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [ioapi] Generalise i386 raw I/O API to x86Michael Brown2012-07-171-14/+0Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [cmdline] Add "cpuid" commandMichael Brown2012-06-071-86/+0Star
| | | | | | | Allow x86 CPU feature flags (such as support for 64-bit mode) to be checked using the "cpuid" command. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Merge i386 and x86_64 versions of errfile.hMichael Brown2012-06-061-46/+0Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [vmware] Allow settings to be specified in the VMware .vmx fileMichael Brown2012-04-171-0/+1
| | | | | | | | | | | | | Allow iPXE settings to be specified in the .vmx file via the VMware GuestInfo mechanism. For example: guestinfo.ipxe.filename = "http://boot.ipxe.org/demo/boot.php" guestinfo.ipxe.dns = "192.168.0.1" guestinfo.ipxe.net0.ip = "192.168.0.15" guestinfo.ipxe.net0.netmask = "255.255.255.0" guestinfo.ipxe.net0.gateway = "192.168.0.1" Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [time] Add RTC-based time sourceMichael Brown2012-03-191-0/+2
| | | | | | Add a time source using the CMOS RTC to obtain the current time. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [time] Define an API for getting the current timeMichael Brown2012-03-191-0/+12
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [i386] Use memory address constraints in __bswap_16s() and __bswap_64s()Michael Brown2012-03-041-4/+3Star
| | | | | | | | Minimise code size by forcing the use of memory addresses for __bswap_16s() and __bswap_64s(). (__bswap_32s() cannot avoid loading the value into a register.) Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [i386] Fix building on older versions of gccMichael Brown2012-03-041-3/+7
| | | | | | | Fix a strict-aliasing error on certain versions of gcc. Reported-by: Marko Myllynen <myllynen@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [i386] Optimise byte-swapping functions and provide __bswap_{16,32,64}s()Michael Brown2012-03-041-32/+56
| | | | | | | | | | | Use the "bswap" instruction to shrink the size of byte-swapping code, and provide the in-place variants __bswap_{16,32,64}s. "bswap" is available only on 486 and later processors. (We already assume the presence of "cpuid" and "rdtsc", which are available only on Pentium and later processors.) Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [vmware] Add GuestRPC mechanismMichael Brown2012-02-291-0/+2
| | | | | | Use the VMware backdoor I/O port to access the GuestRPC mechanism. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [rng] Add RTC-based entropy sourceMichael Brown2012-02-281-0/+2
| | | | | | | | | | | The RTC-based entropy source uses the nanosecond-scale CPU TSC to measure the time between two 1kHz interrupts generated by the CMOS RTC. In a physical machine these clocks are driven from independent crystals, resulting in some observable clock drift. In a virtual machine, the CMOS RTC is typically emulated using host-OS constructions such as SIGALRM. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [rng] Add ANS X9.82 Approved Source of Entropy InputMichael Brown2012-02-211-0/+12
| | | | | | | | | | | | | | | | ANS X9.82 specifies several Approved Sources of Entropy Input (SEI). One such SEI uses an entropy source as the Source of Entropy Input, condensing each entropy source output after each GetEntropy call. This can be implemented relatively cheaply in iPXE and avoids the need to allocate potentially very large buffers. (Note that the terms "entropy source" and "Source of Entropy Input" are not synonyms within the context of ANS X9.82.) Use the iPXE API mechanism to allow entropy sources to be selected at compilation time. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [prefix] Allow an initrd to be passed to iPXEMichael Brown2011-11-121-0/+1
| | | | | | | | Allow an initrd (such as an embedded script) to be passed to iPXE when loaded as a .lkrn (or .iso) image. This allows an embedded script to be varied without recompiling iPXE. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [block] Replace gPXE block-device API with an iPXE asynchronous interfaceMichael Brown2010-09-142-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The block device interface used in gPXE predates the invention of even the old gPXE data-transfer interface, let alone the current iPXE generic asynchronous interface mechanism. Bring this old code up to date, with the following benefits: o Block device commands can be cancelled by the requestor. The INT 13 layer uses this to provide a global timeout on all INT 13 calls, with the result that an unexpected passive failure mode (such as an iSCSI target ACKing the request but never sending a response) will lead to a timeout that gets reported back to the INT 13 user, rather than simply freezing the system. o INT 13,00 (reset drive) is now able to reset the underlying block device. INT 13 users, such as DOS, that use INT 13,00 as a method for error recovery now have a chance of recovering. o All block device commands are tagged, with a numerical tag that will show up in debugging output and in packet captures; this will allow easier interpretation of bug reports that include both sources of information. o The extremely ugly hacks used to generate the boot firmware tables have been eradicated and replaced with a generic acpi_describe() method (exploiting the ability of iPXE interfaces to pass through methods to an underlying interface). The ACPI tables are now built in a shared data block within .bss16, rather than each requiring dedicated space in .data16. o The architecture-independent concept of a SAN device has been exposed to the iPXE core through the sanboot API, which provides calls to hook, unhook, boot, and describe SAN devices. This allows for much more flexible usage patterns (such as hooking an empty SAN device and then running an OS installer via TFTP). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add linux api headersPiotr Jaroszyński2010-08-191-0/+6
| | | | | Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Rename gPXE to iPXEMichael Brown2010-04-205-7/+7
| | | | | | | | | | | 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>
* [pxe] Separate parent PXE API caller from UNDINET driverJoshua Oreman2010-01-201-0/+1
| | | | | | | | | Calling the parent PXE stack (the stack that loaded us, for undionly.kkpxe) can be useful for more than UNDI calls; for instance, it lets us get cached DHCP packets to avoid re-DHCP when working with embedded images. Signed-off-by: Marty Connor <mdc@etherboot.org>
* [legal] Add a selection of FILE_LICENCE declarationsMichael Brown2009-05-1811-0/+22
| | | | | Add FILE_LICENCE declarations to almost all files that make up the various standard builds of gPXE.
* [build] Use __SIZE_TYPE__ macro in definition of size_tJoshua Oreman2009-03-311-2/+2
| | | | | | | This is required in order to build on Mac OS X. Modified-by: Michael Brown <mcb30@etherboot.org> Signed-off-by: Michael Brown <mcb30@etherboot.org>
* [comboot] Allow for tail recursion of COMBOOT imagesMichael Brown2009-02-171-0/+1
| | | | | | | | | | | | Multi-level menus via COMBOOT rely on the COMBOOT program being able to exit and invoke a new COMBOOT program (the next menu). This works, but rapidly (within about five iterations) runs out of space in gPXE's internal stack, since each new image is executed in a new function context. Fix by allowing tail recursion between images; an image can now specify a replacement image for itself, and image_exec() will perform the necessary tail recursion.
* [x86_64] Add support for compilation as an x86_64 binaryMichael Brown2008-12-054-307/+7Star
| | | | | | | | | | | | Currently the only supported platform for x86_64 is EFI. Building an EFI64 gPXE requires a version of gcc that supports __attribute__((ms_abi)). This currently means a development build of gcc; the feature should be present when gcc 4.4 is released. In the meantime; you can grab a suitable gcc tree from git://git.etherboot.org/scm/people/mcb30/gcc/.git
* [efi] Use EFI-native mechanism for accessing SMBIOS tableMichael Brown2008-12-052-2/+13
| | | | | | EFI provides a copy of the SMBIOS table accessible via the EFI system table, which we should use instead of manually scanning through the F000:0000 segment.
* [i386] Change [u]int32_t to [unsigned] int, rather than [unsigned] longMichael Brown2008-11-191-2/+2
| | | | | | This brings us in to line with Linux definitions, and also simplifies adding x86_64 support since both platforms have 2-byte shorts, 4-byte ints and 8-byte long longs.
* [libgcc] Make __libgcc architecture-specificMichael Brown2008-11-191-0/+14
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* [i386] Rename __cdecl to __asmcallMichael Brown2008-11-191-0/+11
| | | | | __cdecl is a misleading name, since it currently encapsulates both cdecl and regparm(0) attributes. Rename to __asmcall.
* [elf] Kill off unused <bits/elf.h> and <bits/elf_x.h> header filesMichael Brown2008-11-182-96/+0Star
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* [efi] Add EFI image format and basic runtime environmentMichael Brown2008-10-131-0/+1
| | | | | | | | | We have EFI APIs for CPU I/O, PCI I/O, timers, console I/O, user access and user memory allocation. EFI executables are created using the vanilla GNU toolchain, with the EXE header handcrafted in assembly and relocations generated by a custom efilink utility.
* [umalloc] Formalise the user memory allocation APIMichael Brown2008-10-132-1/+13
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* [uaccess] Formalise the uaccess APIMichael Brown2008-10-131-1/+7
| | | | | | The userptr_t is now the fundamental type that gets used for conversions. For example, virt_to_phys() is implemented in terms of virt_to_user() and user_to_phys().
* [nap] Formalise the CPU sleeping APIMichael Brown2008-10-131-0/+12
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