diff options
Diffstat (limited to 'gdb/mips-tdep.c')
| -rw-r--r-- | gdb/mips-tdep.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c index f815512..2cdbd70 100644 --- a/gdb/mips-tdep.c +++ b/gdb/mips-tdep.c @@ -4690,6 +4690,20 @@ mips_find_abi_section (bfd *abfd, asection *sect, void *obj) warning (_("unsupported ABI %s."), name + 8); } +static void +mips_find_long_section (bfd *abfd, asection *sect, void *obj) +{ + int *lbp = (int *) obj; + const char *name = bfd_get_section_name (abfd, sect); + + if (strncmp (name, ".gcc_compiled_long32", 20) == 0) + *lbp = 32; + else if (strncmp (name, ".gcc_compiled_long64", 20) == 0) + *lbp = 64; + else if (strncmp (name, ".gcc_compiled_long", 18) == 0) + warning (_("unrecognized .gcc_compiled_longXX")); +} + static enum mips_abi global_mips_abi (void) { @@ -5009,6 +5023,58 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) internal_error (__FILE__, __LINE__, _("unknown ABI in switch")); } + /* GCC creates a pseudo-section whose name specifies the size of + longs, since -mlong32 or -mlong64 may be used independent of + other options. How those options affect pointer sizes is ABI and + architecture dependent, so use them to override the default sizes + set by the ABI. This table shows the relationship between ABI, + -mlongXX, and size of pointers: + + ABI -mlongXX ptr bits + --- -------- -------- + o32 32 32 + o32 64 32 + n32 32 32 + n32 64 64 + o64 32 32 + o64 64 64 + n64 32 32 + n64 64 64 + eabi32 32 32 + eabi32 64 32 + eabi64 32 32 + eabi64 64 64 + + Note that for o32 and eabi32, pointers are always 32 bits + regardless of any -mlongXX option. For all others, pointers and + longs are the same, as set by -mlongXX or set by defaults. + */ + + if (info.abfd != NULL) + { + int long_bit = 0; + + bfd_map_over_sections (info.abfd, mips_find_long_section, &long_bit); + if (long_bit) + { + set_gdbarch_long_bit (gdbarch, long_bit); + switch (mips_abi) + { + case MIPS_ABI_O32: + case MIPS_ABI_EABI32: + break; + case MIPS_ABI_N32: + case MIPS_ABI_O64: + case MIPS_ABI_N64: + case MIPS_ABI_EABI64: + set_gdbarch_ptr_bit (gdbarch, long_bit); + break; + default: + internal_error (__FILE__, __LINE__, _("unknown ABI in switch")); + } + } + } + /* FIXME: jlarmour/2000-04-07: There *is* a flag EF_MIPS_32BIT_MODE that could indicate -gp32 BUT gas/config/tc-mips.c contains the comment: |