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2025-02-10Port GDB to Hurd x86_64.Flavio Cruz1-0/+516
This port extends the existing i686 port to support x86_64 by reusing existing code whenever it makes sense. * gdb/amd64-gnu-tdep.c: Adds logic for handling signal frames and position of amd64 registers in the different Hurd structs. The signal code is very similar to i686, except the trampoline code is adapted. * gdb/config/i386/nm-i386gnu.h: renamed to gdb/config/i386/nm-x86-gnu.h and adapt it for x86_64. * gdb/config/i386/i386gnu.mn: renamed to gdb/config/i386/nm-x86-gnu.mn and reuse it for x86_64. * gdb/configure.host: recognize gnu64 as a host. * gdb/configure.nat: recognize gnu64 host and update existing i386gnu to reuse the new shared files. * gdb/configure.tgt: recognize x86_64-*-gnu* triplet and use amd64-gnu-tdep.c. * gdb/i386-gnu-tdep.c: added i386_gnu_thread_state_reg_offset that is copied from i386-gnu-nat.c. This makes it similar to amd64. * gdb/i386-gnu-nat.c: rename it to x86-gnu-nat.c since we reuse this for i386 and amd64. Updated REG_ADDR to use one of the structures. Added VALID_REGISTER to make sure it's a register we can provide at this time (not all of them are available in amd64). FLAGS_REGISTER is either rfl or efl depending on the arch. Renamed functions and class from i386 to x86 whenever they can be reused. Tested on Hurd x86_64 and i686.