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[PATCH v3 00/29] bsd-user: arm (32-bit) support

From: Warner Losh
Subject: [PATCH v3 00/29] bsd-user: arm (32-bit) support
Date: Thu, 4 Nov 2021 08:05:07 -0600

This series of patches brings in 32-bit arm support for bsd-user.  It implements
all the bits needed to do image activation, signal handling, stack management
and threading. This allows us to get to the "Hello World" level. The arm and x86
code are now the same as in the bsd-user fork. For full context, the fork is at
https://github.com/qemu-bsd-user/qemu-bsd-user/tree/blitz (though the the recent
sig{bus,segv} needed updates are incomplete).

V3 addresses review comments:
   o Update target_arch_cpu.h to remove bogus unaligned check and notyet code.
   o Fixed target_thread_init to match FreeBSD's startup code and remove the
     cut-n-paste code from Linux's startup. Add comments.
   o Fixed various bugs with setting CPSR unaddressed from patch comments on v1
   o Use #defines instead of bare constants for user mode.

Following still need reviews:
    bsd-user/arm/target_arch_signal.h: arm machine context for signals
    bsd-user/arm/target_arch_cpu.h: Implement trivial EXCP exceptions

Warnings that should be ignored:
   o make checkpatch has a couple of complaints about the comments for the
     signal trampoline, since it's a false positive IMHO.
WARNING: Block comments use a leading /* on a separate line
+    /* 8 */ sys_sigreturn,
WARNING: Block comments use a leading /* on a separate line
+    /* 9 */ sys_exit

Warner Losh (29):
  bsd-user/arm/target_arch_sysarch.h: Use consistent include guards
  bsd-user/arm/target_syscall.h: Add copyright and update name
  bsd-user/arm/target_arch_cpu.c: Target specific TLS routines
  bsd-user/arm/target_arch_cpu.h: CPU Loop definitions
  bsd-user/arm/target_arch_cpu.h: Implement target_cpu_clone_regs
  bsd-user/arm/target_arch_cpu.h: Dummy target_cpu_loop implementation
  bsd-user/arm/target_arch_cpu.h: Implement trivial EXCP exceptions
  bsd-user/arm/target_arch_cpu.h: Implement data abort exceptions
  bsd-user/arm/target_arch_cpu.h: Implement system call dispatch
  bsd-user/arm/target_arch_reg.h: Implement core dump register copying
  bsd-user/arm/target_arch_vmparam.h: Parameters for arm address space
  bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm
  bsd-user/arm/target_arch_thread.h: Routines to create and switch to a
  bsd-user/arm/target_arch_elf.h: arm defines for ELF
  bsd-user/arm/target_arch_elf.h: arm get hwcap
  bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl
  bsd-user/freebsd: Create common target_os_ucontext.h file
  bsd-user/arm/target_arch_signal.h: arm specific signal registers and
  bsd-user/arm/target_arch_signal.h: arm machine context for signals
  bsd-user/arm/target_arch_signal.h: arm user context and trapframe for
  bsd-user/arm/target_arch_signal.h: arm set_sigtramp_args
  bsd-user/arm/target_arch_signal.h: arm get_mcontext
  bsd-user/arm/target_arch_signal.h: arm set_mcontext
  bsd-user/arm/target_arch_signal.h: arm get_ucontext_sigreturn
  bsd-user: add arm target build
  bsd-user/i386/target_arch_signal.h: Remove target_sigcontext
  bsd-user/x86_64/target_arch_signal.h: Remove target_sigcontext
  bsd-user/i386/target_arch_signal.h: use new target_os_ucontext.h
  bsd-user/x86_64/target_arch_signal.h: use new target_os_ucontext.h

 bsd-user/arm/target_arch.h            |  28 +++
 bsd-user/arm/target_arch_cpu.c        |  39 ++++
 bsd-user/arm/target_arch_cpu.h        | 211 +++++++++++++++++++++
 bsd-user/arm/target_arch_elf.h        | 128 +++++++++++++
 bsd-user/arm/target_arch_reg.h        |  60 ++++++
 bsd-user/arm/target_arch_signal.h     | 258 ++++++++++++++++++++++++++
 bsd-user/arm/target_arch_sigtramp.h   |  49 +++++
 bsd-user/arm/target_arch_sysarch.h    |   6 +-
 bsd-user/arm/target_arch_thread.h     |  82 ++++++++
 bsd-user/arm/target_arch_vmparam.h    |  48 +++++
 bsd-user/arm/target_syscall.h         |  27 ++-
 bsd-user/freebsd/target_os_signal.h   |   3 -
 bsd-user/freebsd/target_os_ucontext.h |  26 +++
 bsd-user/i386/target_arch_signal.h    |  13 +-
 bsd-user/x86_64/target_arch_signal.h  |  13 +-
 configs/targets/arm-bsd-user.mak      |   2 +
 16 files changed, 959 insertions(+), 34 deletions(-)
 create mode 100644 bsd-user/arm/target_arch.h
 create mode 100644 bsd-user/arm/target_arch_cpu.c
 create mode 100644 bsd-user/arm/target_arch_cpu.h
 create mode 100644 bsd-user/arm/target_arch_elf.h
 create mode 100644 bsd-user/arm/target_arch_reg.h
 create mode 100644 bsd-user/arm/target_arch_signal.h
 create mode 100644 bsd-user/arm/target_arch_sigtramp.h
 create mode 100644 bsd-user/arm/target_arch_thread.h
 create mode 100644 bsd-user/arm/target_arch_vmparam.h
 create mode 100644 bsd-user/freebsd/target_os_ucontext.h
 create mode 100644 configs/targets/arm-bsd-user.mak


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