observations with "HAVE_GCC=48"

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

Following some recent commits, a release build completes without
problems when using gcc 4.8.3.

Runtime is another matter.

'ofwboot.xcf' built with gcc 4.8.3 incurs:

  DEFAULT CATCH!,  code=300 at    %SRR0: 00e0e714    %SRR1: 00083030

Attempting to boot anything else afterwards without resetting results in:

  CLAIM failed

Following reset, booting with gcc-4.5.4-built 'ofwboot.xcf' works,
but a gcc-4.8.3-built GENERIC kernel panics with:

  No ADB support present, assuming USB keyboard
  mem region 0 start=0 size=20000000
  mem region 1 start=20000000 size=20000000
  mem region 2 start=40000000 size=20000000
  mem region 3 start=60000000 size=20000000
  avail region 0 start=0xc000 size=0xdf4000
  avail region 1 start=0xe1b000 size=0x7ede5000
  panic: pmap_steal_memory: no appropriate memory to steal!
  Stopped in pid 0.1 (system) at  netbsd:vpanic+0x13c:     or     r3, r29, r29
  0x656eade0: at panic+0x4c
  0x656eae20: at pmap_steal_memory+0x18c
  0x656eae50: at uvm_page_init+0x134
  0x656eaea0: at uvm_init+0x44
  0x656eaec0: at main+0x5c
  0x656eaf10: at 0x1000a4
  db>

The target machine is a PowerMac G4 (AGP Graphics)--"sawtooth" IIRC--
with stock 400MHz MPC 7400 and 2GB RAM.

I'll see about building a debug version of the kernel for more info.

--
|/"\ John D. Baker, KN5UKS               NetBSD     Darwin/MacOS X
|\ / jdbaker[snail]mylinuxisp[flyspeck]com    OpenBSD            FreeBSD
| X  No HTML/proprietary data in email.   BSD just sits there and works!
|/ \ GPGkeyID:  D703 4A7E 479F 63F8 D3F4  BD99 9572 8F23 E4AD 1645