gdb/or1k: Add linux debugging support
PATCH 1/1 gdb/or1k: Add linux debugging support
Up until now OpenRISC GDB only has supported bare metal debugging. This patch adds linux userspace debugging and core dump analysis support.
The changes are loosely based on nios2 and riscv implementations.
This was tested with linux 4.20 core dumps for executables linked against musl libc.
bfd/ChangeLog:
* elf32-or1k.c (or1k_grok_prstatus): New function. (or1k_grok_psinfo): Likewise.
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Add or1k-linux-tdep.o.
* configure.tgt: Add or1k*-*-linux*.
* or1k-linux-tdep.c: New file.
* or1k-tdep.c (or1k_gdbarch_init): Call gdbarch_init_osabi.
--- bfd/elf32-or1k.c | 55 ++++++++++++++ gdb/Makefile.in | 1 + gdb/configure.tgt | 8 ++ gdb/or1k-linux-tdep.c | 170 ++++++++++++++++++++++++++++++++++++++++++ gdb/or1k-tdep.c | 3 + 5 files changed, 237 insertions(+) create mode 100644 gdb/or1k-linux-tdep.c
bfd/elf32-or1k.c +55 -0
@@ -3226,6 +3226,58 @@ elf32_or1k_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) } +/* Implement elf_backend_grok_prstatus: +Support for core dump NOTE sections. */ +static bfd_boolean +or1k_grok_prstatus (bfd *abfd,Elf_Internal_Note *note) +{ +int offset; +size_t size; + +switch (note->descsz) + { +default : +return FALSE; + +case 212 :/* Linux/OpenRISC */ +/* pr_cursig */ +elf_tdata (abfd)->core->signal =bfd_get_16 (abfd, note->descdata +12 ); + +/* pr_pid */ +elf_tdata (abfd)->core->pid =bfd_get_32 (abfd, note->descdata +24 ); + +/* pr_reg */ + offset =72 ; + size =132 ; + +break ; + } + +/* Make a ".reg/999" section. */ +return _bfd_elfcore_make_pseudosection (abfd,".reg" , + size, note->descpos + offset); +} + +/* Implement elf_backend_grok_psinfo. */ +static bfd_boolean +or1k_grok_psinfo (bfd *abfd,Elf_Internal_Note *note) +{ +switch (note->descsz) + { +default : +return FALSE; + +case 128 :/* Linux/OpenRISC elf_prpsinfo */ +elf_tdata (abfd)->core->program + =_bfd_elfcore_strndup (abfd, note->descdata +32 ,16 ); +elf_tdata (abfd)->core->command + =_bfd_elfcore_strndup (abfd, note->descdata +48 ,80 ); + } + +return TRUE; +} + +#define ELF_ARCH bfd_arch_or1k#define ELF_MACHINE_CODE EM_OR1K#define ELF_TARGET_ID OR1K_ELF_DATA
@@ -3269,4 +3321,7 @@ elf32_or1k_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)#define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol#define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol +#define elf_backend_grok_prstatus or1k_grok_prstatus +#define elf_backend_grok_psinfo or1k_grok_psinfo +#include "elf32-target.h"
gdb/Makefile.in +1 -0
@@ -740,6 +740,7 @@ ALL_TARGET_OBS = \ nios2-tdep.o \ nto-tdep.o \ obsd-tdep.o \ + or1k-linux-tdep.o \ or1k-tdep.o \ ppc-fbsd-tdep.o \ ppc-linux-tdep.o \
gdb/configure.tgt +8 -0
@@ -471,6 +471,14 @@ nios2*-*-*) gdb_target_obs="nios2-tdep.o" ;; +or1k*-*-linux*) + # Target: OpenCores OpenRISC 1000 32-bit running Linux + gdb_target_obs="or1k-tdep.o or1k-linux-tdep.o solib-svr4.o \ + symfile-mem.o glibc-tdep.o linux-tdep.o" + gdb_sim=../sim/or1k/libsim.a + build_gdbserver=yes + ;; + or1k-*-* | or1knd-*-*) # Target: OpenCores OpenRISC 1000 32-bit implementation bare metal gdb_target_obs="or1k-tdep.o"
gdb/or1k-linux-tdep.c new file +170 -0
170 lines not on this page · raw message
gdb/or1k-tdep.c +3 -0
@@ -1256,6 +1256,9 @@ or1k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)tdesc_use_registers (gdbarch, tdesc, tdesc_data); } +/* Hook in ABI-specific overrides, if they have been registered. */ +gdbarch_init_osabi (info, gdbarch); +return gdbarch; }
Signature · 1 line
2.19.1