Enable GDB for binutils 2.40 and fix native AmigaOS debugging by derfsss · Pull Request #46 · AmigaLabs/adtools

derfsss · 2026-04-10T20:00:16Z

Binutils build changes:

Enable GDB in both cross and native 2.40 builds (remove --disable-gdb)
Add --with-python=no to native build configuration

GDB native debugging fixes (patch 0002):

Fix register fetch/store: correct GPR/FPR indexing, implement WriteTaskContext for store_registers, gate AltiVec on ECF_VECTOR
Fix trap numbers: use SDK TRAPNUM_* values from exec/interrupts.h instead of raw PPC vector offsets
Implement attach() for connecting to running processes
Fix kill() to use Signal+RestartTask instead of DeleteTask
Add message pool safety with Forbid/Permit and NULL checks
Fix BFD file cache: skip realpath on AmigaOS to prevent path mangling (assigns like T: resolve to "RAM Disk:T/" which fails)
Fix charset: force UTF-8 host charset on AmigaOS (clib4 iconv)

Test infrastructure:

Add GDB test targets to tests/makefile (test-gdb-all, test-gdb-smoke, test-gdb-load, test-gdb-disasm, test-gdb-remote)
Add docs/ to .gitignore

Binutils build changes: - Enable GDB in both cross and native 2.40 builds (remove --disable-gdb) - Add --with-python=no to native build configuration GDB native debugging fixes (patch 0002): - Fix register fetch/store: correct GPR/FPR indexing, implement WriteTaskContext for store_registers, gate AltiVec on ECF_VECTOR - Fix trap numbers: use SDK TRAPNUM_* values from exec/interrupts.h instead of raw PPC vector offsets - Implement attach() for connecting to running processes - Fix kill() to use Signal+RestartTask instead of DeleteTask - Add message pool safety with Forbid/Permit and NULL checks - Fix BFD file cache: skip realpath on AmigaOS to prevent path mangling (assigns like T: resolve to "RAM Disk:T/" which fails) - Fix charset: force UTF-8 host charset on AmigaOS (clib4 iconv) Test infrastructure: - Add GDB test targets to tests/makefile (test-gdb-all, test-gdb-smoke, test-gdb-load, test-gdb-disasm, test-gdb-remote) - Add docs/ to .gitignore Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

josefwegner · 2026-06-19T14:23:13Z

Sadly does not compile for me because of some GCLIBC includes hack:

make[4]: Entering directory '/opt/code/native-build/binutils-native-build-2.40/gdbsupport'
make  all-am
make[5]: Entering directory '/opt/code/native-build/binutils-native-build-2.40/gdbsupport'
  CXX      agent.o
In file included from ../gnulib/import/stdint.h:584,
                 from /opt/code/binutils/repo/gdbsupport/common-defs.h:95,
                 from /opt/code/binutils/repo/gdbsupport/agent.cc:20:
../gnulib/import/wchar.h:66:11: fatal error: features.h: No such file or directory
   66 | # include <features.h> /* for __GLIBC__ */
      |           ^~~~~~~~~~~~
compilation terminated.

binutils-native-build-2.40/gnulib/import/wchar.h

#if 1
# include <features.h> /* for __GLIBC__ */
#endif

That might be caused by a difference in the CLIB4 headers between the cross-compiler and clib4 repo. The #if 1 is really #if HAVE_FEATURES_H. And newer versions of CLIB4 do have features.h

josefwegner · 2026-06-19T17:33:42Z

But building a cross compiler with adtools fails because of this:

gcc -c -DHAVE_CONFIG_H -Wno-sign-compare       -I. -I/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -Wshadow=local -pedantic  -D_GNU_SOURCE  /home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/lbasename.c -o lbasename.o
In file included from /home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/lbasename.c:46:
/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/lbasename.c: In function ‘amiga_lbasename’:
/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/../include/filenames.h:88:35: error: implicit declaration of function ‘index’ [-Wimplicit-function-declaration]
   88 | #define HAS_AMIGOS_DRIVE_SPEC(f) (index (&(f)[0], ':') != NULL )
      |                                   ^~~~~
/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/lbasename.c:82:7: note: in expansion of macro ‘HAS_AMIGOS_DRIVE_SPEC’
   82 |   if (HAS_AMIGOS_DRIVE_SPEC (name)) {
      |       ^~~~~~~~~~~~~~~~~~~~~
/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/../include/filenames.h:88:35: warning: incompatible implicit declaration of built-in function ‘index’ [-Wbuiltin-declaration-mismatch]
   88 | #define HAS_AMIGOS_DRIVE_SPEC(f) (index (&(f)[0], ':') != NULL )
      |                                   ^~~~~
/home/jwegne/Projects/amiga/adtools/binutils/repo/libiberty/lbasename.c:82:7: note: in expansion of macro ‘HAS_AMIGOS_DRIVE_SPEC’
   82 |   if (HAS_AMIGOS_DRIVE_SPEC (name)) {
      |       ^~~~~~~~~~~~~~~~~~~~~
make[4]: *** [Makefile:963: lbasename.o] Fehler 1
make[4]: Verzeichnis „/home/jwegne/Projects/amiga/adtools/native-build/binutils-cross-build-2.40/libiberty“ wird verlassen
make[3]: *** [Makefile:9997: all-libiberty] Fehler 2
make[3]: Verzeichnis „/home/jwegne/Projects/amiga/adtools/native-build/binutils-cross-build-2.40“ wird verlassen
make[2]: *** [Makefile:1004: all] Fehler 2
make[2]: Verzeichnis „/home/jwegne/Projects/amiga/adtools/native-build/binutils-cross-build-2.40“ wird verlassen
make[1]: *** [Makefile:81: cross] Fehler 2
make[1]: Verzeichnis „/home/jwegne/Projects/amiga/adtools/binutils-build“ wird verlassen
make: *** [makefile:163: binutils-cross-build-done-2.40] Fehler 2
make: Verzeichnis „/home/jwegne/Projects/amiga/adtools/native-build“ wird verlassen

josefwegner · 2026-06-21T08:35:47Z

I was able to build adtools with gcc 13 and binutils 2.40 but without gdb.
It has still the same filename/tmpfile issues:

make
gcc -O2 -Wall -D__USE_INLINE__ -o abi tests/abi.c
T:/ccpjQCkV.s: Assembler messages:
T:/ccpjQCkV.s: Fatal error: can't write 8 bytes to section .text of T:/cceVptoL.o: 'Input/output error'
Work:Cubic IDE/ide/devkits/compilers/gcc/amigaos4/13.4.0/ppc-amigaos/bin/as: BFD (GNU Binutils) 2.40 assertion fail /opt/code/binutils/repo/bfd/elf.c:3108
T:/ccpjQCkV.s: Fatal error: T:/cceVptoL.o: Device busy
make: *** [abi] Error 1
Work:Cubic IDE/ide/devkits/compilers/gcc/amigaos4/13.4.0/ppc-amigaos/bin/as fehlgeschlagen, Rckgabewert 20

josefwegner · 2026-06-21T16:46:21Z

I was able to build adtools with gcc 13 and binutils 2.40 but without gdb.
It has still the same filename/tmpfile issues:

make
gcc -O2 -Wall -D__USE_INLINE__ -o abi tests/abi.c
T:/ccpjQCkV.s: Assembler messages:
T:/ccpjQCkV.s: Fatal error: can't write 8 bytes to section .text of T:/cceVptoL.o: 'Input/output error'
Work:Cubic IDE/ide/devkits/compilers/gcc/amigaos4/13.4.0/ppc-amigaos/bin/as: BFD (GNU Binutils) 2.40 assertion fail /opt/code/binutils/repo/bfd/elf.c:3108
T:/ccpjQCkV.s: Fatal error: T:/cceVptoL.o: Device busy
make: *** [abi] Error 1
Work:Cubic IDE/ide/devkits/compilers/gcc/amigaos4/13.4.0/ppc-amigaos/bin/as fehlgeschlagen, Rckgabewert 20

Sadly does not compile for me because of some GCLIBC includes hack:
make[4]: Entering directory '/opt/code/native-build/binutils-native-build-2.40/gdbsupport'
make  all-am
make[5]: Entering directory '/opt/code/native-build/binutils-native-build-2.40/gdbsupport'
  CXX      agent.o
In file included from ../gnulib/import/stdint.h:584,
                 from /opt/code/binutils/repo/gdbsupport/common-defs.h:95,
                 from /opt/code/binutils/repo/gdbsupport/agent.cc:20:
../gnulib/import/wchar.h:66:11: fatal error: features.h: No such file or directory
   66 | # include <features.h> /* for __GLIBC__ */
      |           ^~~~~~~~~~~~
compilation terminated.
binutils-native-build-2.40/gnulib/import/wchar.h
#if 1
# include <features.h> /* for __GLIBC__ */
#endif
That might be caused by a difference in the CLIB4 headers between the cross-compiler and clib4 repo. The #if 1 is really #if HAVE_FEATURES_H. And newer versions of CLIB4 do have features.h

No, the issue is that we need to set the CXXFLAGS=-mcrt=clib4 in binutils-build/Makefile.

But then the compilation fails with:

  CXX    ppc-amigaos-nat.o
virtual memory exhausted: Cannot allocate memory
make[4]: *** [Makefile:1899: ppc-amigaos-nat.o] Error 1
make[4]: Leaving directory '/opt/code/native-build/binutils-native-build-2.40/gdb'
make[3]: *** [Makefile:12856: all-gdb] Error 2
make[3]: Leaving directory '/opt/code/native-build/binutils-native-build-2.40'
make[2]: *** [Makefile:1004: all] Error 2
make[2]: Leaving directory '/opt/code/native-build/binutils-native-build-2.40'
make[1]: *** [Makefile:94: native] Error 2
make[1]: Leaving directory '/opt/code/binutils-build'
make: *** [makefile:331: binutils-native-done-2.40] Error 2
make: Leaving directory '/opt/code/native-build'

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Enable GDB for binutils 2.40 and fix native AmigaOS debugging - #46

Enable GDB for binutils 2.40 and fix native AmigaOS debugging#46
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