diff options
Diffstat (limited to 'bfd/elf32-arc.c')
| -rw-r--r-- | bfd/elf32-arc.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/bfd/elf32-arc.c b/bfd/elf32-arc.c index 00828be..89a2b52 100644 --- a/bfd/elf32-arc.c +++ b/bfd/elf32-arc.c @@ -2439,6 +2439,39 @@ elf_arc_add_symbol_hook (bfd * abfd, return TRUE; } +/* GDB expects general purpose registers to be in section .reg. However Linux + kernel doesn't create this section and instead writes registers to NOTE + section. It is up to the binutils to create a pseudo-section .reg from the + contents of NOTE. Also BFD will read pid and signal number from NOTE. This + function relies on offsets inside elf_prstatus structure in Linux to be + stable. */ + +static bfd_boolean +elf32_arc_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + int offset; + size_t size; + + switch (note->descsz) + { + default: + return FALSE; + + case 236: /* sizeof (struct elf_prstatus) on Linux/arc. */ + /* pr_cursig */ + elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); + /* pr_pid */ + elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); + /* pr_regs */ + offset = 72; + size = (40 * 4); /* There are 40 registers in user_regs_struct. */ + break; + } + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", size, + note->descpos + offset); +} + #define TARGET_LITTLE_SYM arc_elf32_le_vec #define TARGET_LITTLE_NAME "elf32-littlearc" #define TARGET_BIG_SYM arc_elf32_be_vec @@ -2484,6 +2517,8 @@ elf_arc_add_symbol_hook (bfd * abfd, #define elf_backend_may_use_rela_p 1 #define elf_backend_default_use_rela_p 1 +#define elf_backend_grok_prstatus elf32_arc_grok_prstatus + #define elf_backend_default_execstack 0 #include "elf32-target.h" |