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From: John Baldwin <jhb@sourceware.org> To: gdb-cvs@sourceware.org Subject: [binutils-gdb] Read the tpidr register from NT_ARM_TLS core dump notes on FreeBSD/Aarch64. Date: Tue, 3 May 2022 23:10:54 +0000 (GMT) [thread overview] Message-ID: <20220503231054.6DAFE3858C51@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0a765c1a8e9c59f4cd0cdaf986291f957fe6ee90 commit 0a765c1a8e9c59f4cd0cdaf986291f957fe6ee90 Author: John Baldwin <jhb@FreeBSD.org> Date: Tue May 3 16:05:10 2022 -0700 Read the tpidr register from NT_ARM_TLS core dump notes on FreeBSD/Aarch64. Diff: --- gdb/aarch64-fbsd-tdep.c | 34 ++++++++++++++++++++++++++++++++++ gdb/aarch64-fbsd-tdep.h | 3 +++ 2 files changed, 37 insertions(+) diff --git a/gdb/aarch64-fbsd-tdep.c b/gdb/aarch64-fbsd-tdep.c index 32f441892a8..ed1b84387f0 100644 --- a/gdb/aarch64-fbsd-tdep.c +++ b/gdb/aarch64-fbsd-tdep.c @@ -142,10 +142,42 @@ aarch64_fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, void *cb_data, const struct regcache *regcache) { + aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch); + cb (".reg", AARCH64_FBSD_SIZEOF_GREGSET, AARCH64_FBSD_SIZEOF_GREGSET, &aarch64_fbsd_gregset, NULL, cb_data); cb (".reg2", AARCH64_FBSD_SIZEOF_FPREGSET, AARCH64_FBSD_SIZEOF_FPREGSET, &aarch64_fbsd_fpregset, NULL, cb_data); + + if (tdep->has_tls ()) + { + const struct regcache_map_entry aarch64_fbsd_tls_regmap[] = + { + { 1, tdep->tls_regnum, 8 }, + { 0 } + }; + + const struct regset aarch64_fbsd_tls_regset = + { + aarch64_fbsd_tls_regmap, + regcache_supply_regset, regcache_collect_regset + }; + + cb (".reg-aarch-tls", AARCH64_FBSD_SIZEOF_TLSREGSET, + AARCH64_FBSD_SIZEOF_TLSREGSET, &aarch64_fbsd_tls_regset, + "TLS register", cb_data); + } +} + +/* Implement the "core_read_description" gdbarch method. */ + +static const struct target_desc * +aarch64_fbsd_core_read_description (struct gdbarch *gdbarch, + struct target_ops *target, bfd *abfd) +{ + asection *tls = bfd_get_section_by_name (abfd, ".reg-aarch-tls"); + + return aarch64_read_description (0, false, false, tls != nullptr); } /* Implement the 'init_osabi' method of struct gdb_osabi_handler. */ @@ -168,6 +200,8 @@ aarch64_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) set_gdbarch_iterate_over_regset_sections (gdbarch, aarch64_fbsd_iterate_over_regset_sections); + set_gdbarch_core_read_description (gdbarch, + aarch64_fbsd_core_read_description); } void _initialize_aarch64_fbsd_tdep (); diff --git a/gdb/aarch64-fbsd-tdep.h b/gdb/aarch64-fbsd-tdep.h index fc8fbee8843..7419ea6be03 100644 --- a/gdb/aarch64-fbsd-tdep.h +++ b/gdb/aarch64-fbsd-tdep.h @@ -32,6 +32,9 @@ alignment. */ #define AARCH64_FBSD_SIZEOF_FPREGSET (33 * V_REGISTER_SIZE) +/* The TLS regset consists of a single register. */ +#define AARCH64_FBSD_SIZEOF_TLSREGSET (X_REGISTER_SIZE) + extern const struct regset aarch64_fbsd_gregset; extern const struct regset aarch64_fbsd_fpregset;
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