diff options
Diffstat (limited to 'gdb/elfread.c')
| -rw-r--r-- | gdb/elfread.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/gdb/elfread.c b/gdb/elfread.c index 117e674..d825d9a 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -36,6 +36,8 @@ #include "demangle.h" #include "psympriv.h" #include "filenames.h" +#include "probe.h" +#include "arch-utils.h" #include "gdbtypes.h" #include "value.h" #include "infcall.h" @@ -60,6 +62,10 @@ struct elfinfo asection *mdebugsect; /* Section pointer for .mdebug section */ }; +/* Per-objfile data for probe info. */ + +static const struct objfile_data *probe_key = NULL; + static void free_elfinfo (void *); /* Minimal symbols located at the GOT entries for .plt - that is the real @@ -1576,7 +1582,117 @@ elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst) complaint (&symfile_complaints, _("elf/stab section information missing for %s"), filename); } + +/* Implementation of `sym_get_probes', as documented in symfile.h. */ + +static VEC (probe_p) * +elf_get_probes (struct objfile *objfile) +{ + VEC (probe_p) *probes_per_objfile; + + /* Have we parsed this objfile's probes already? */ + probes_per_objfile = objfile_data (objfile, probe_key); + + if (!probes_per_objfile) + { + int ix; + const struct probe_ops *probe_ops; + + /* Here we try to gather information about all types of probes from the + objfile. */ + for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops); + ix++) + probe_ops->get_probes (&probes_per_objfile, objfile); + + if (probes_per_objfile == NULL) + { + VEC_reserve (probe_p, probes_per_objfile, 1); + gdb_assert (probes_per_objfile != NULL); + } + + set_objfile_data (objfile, probe_key, probes_per_objfile); + } + + return probes_per_objfile; +} + +/* Implementation of `sym_get_probe_argument_count', as documented in + symfile.h. */ + +static unsigned +elf_get_probe_argument_count (struct objfile *objfile, + struct probe *probe) +{ + return probe->pops->get_probe_argument_count (probe, objfile); +} + +/* Implementation of `sym_evaluate_probe_argument', as documented in + symfile.h. */ + +static struct value * +elf_evaluate_probe_argument (struct objfile *objfile, + struct probe *probe, + unsigned n) +{ + return probe->pops->evaluate_probe_argument (probe, objfile, n); +} + +/* Implementation of `sym_compile_to_ax', as documented in symfile.h. */ + +static void +elf_compile_to_ax (struct objfile *objfile, + struct probe *probe, + struct agent_expr *expr, + struct axs_value *value, + unsigned n) +{ + probe->pops->compile_to_ax (probe, objfile, expr, value, n); +} + +/* Implementation of `sym_relocate_probe', as documented in symfile.h. */ + +static void +elf_symfile_relocate_probe (struct objfile *objfile, + struct section_offsets *new_offsets, + struct section_offsets *delta) +{ + int ix; + VEC (probe_p) *probes = objfile_data (objfile, probe_key); + struct probe *probe; + + for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) + probe->pops->relocate (probe, ANOFFSET (delta, SECT_OFF_TEXT (objfile))); +} + +/* Helper function used to free the space allocated for storing SystemTap + probe information. */ + +static void +probe_key_free (struct objfile *objfile, void *d) +{ + int ix; + VEC (probe_p) *probes = d; + struct probe *probe; + + for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) + probe->pops->destroy (probe); + + VEC_free (probe_p, probes); +} + + +/* Implementation `sym_probe_fns', as documented in symfile.h. */ + +static const struct sym_probe_fns elf_probe_fns = +{ + elf_get_probes, /* sym_get_probes */ + elf_get_probe_argument_count, /* sym_get_probe_argument_count */ + elf_evaluate_probe_argument, /* sym_evaluate_probe_argument */ + elf_compile_to_ax, /* sym_compile_to_ax */ + elf_symfile_relocate_probe, /* sym_relocate_probe */ +}; + /* Register that we are able to handle ELF object file formats. */ static const struct sym_fns elf_sym_fns = @@ -1591,6 +1707,7 @@ static const struct sym_fns elf_sym_fns = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &psym_functions }; @@ -1609,6 +1726,7 @@ static const struct sym_fns elf_sym_fns_lazy_psyms = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &psym_functions }; @@ -1626,6 +1744,7 @@ static const struct sym_fns elf_sym_fns_gdb_index = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &dwarf2_gdb_index_functions }; @@ -1642,6 +1761,7 @@ static const struct gnu_ifunc_fns elf_gnu_ifunc_fns = void _initialize_elfread (void) { + probe_key = register_objfile_data_with_cleanup (NULL, probe_key_free); add_symtab_fns (&elf_sym_fns); elf_objfile_gnu_ifunc_cache_data = register_objfile_data (); |