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From: John Baldwin <jhb@sourceware.org> To: gdb-cvs@sourceware.org Subject: [binutils-gdb] aarch64-fbsd: Use a static regset for the TLS register set. Date: Tue, 22 Nov 2022 22:44:06 +0000 (GMT) [thread overview] Message-ID: <20221122224406.DFF3D3853D5C@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d818c7ad8c6097746f436b8689211626e517d4f7 commit d818c7ad8c6097746f436b8689211626e517d4f7 Author: John Baldwin <jhb@FreeBSD.org> Date: Tue Nov 22 14:21:13 2022 -0800 aarch64-fbsd: Use a static regset for the TLS register set. This uses custom collect/supply regset handlers which pass the TLS register number from the gdbarch_tdep as the base register number. Approved-By: Simon Marchi <simon.marchi@efficios.com> Diff: --- gdb/aarch64-fbsd-nat.c | 36 ++++--------------------------- gdb/aarch64-fbsd-tdep.c | 56 ++++++++++++++++++++++++++++++++++--------------- gdb/aarch64-fbsd-tdep.h | 1 + 3 files changed, 44 insertions(+), 49 deletions(-) diff --git a/gdb/aarch64-fbsd-nat.c b/gdb/aarch64-fbsd-nat.c index 708ddc40d58..ecf7e4fb5a7 100644 --- a/gdb/aarch64-fbsd-nat.c +++ b/gdb/aarch64-fbsd-nat.c @@ -92,22 +92,8 @@ aarch64_fbsd_nat_target::fetch_registers (struct regcache *regcache, gdbarch *gdbarch = regcache->arch (); aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch); 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 - }; - - fetch_regset<uint64_t> (regcache, regnum, NT_ARM_TLS, - &aarch64_fbsd_tls_regset); - } + fetch_regset<uint64_t> (regcache, regnum, NT_ARM_TLS, + &aarch64_fbsd_tls_regset, tdep->tls_regnum); } /* Store register REGNUM back into the inferior. If REGNUM is -1, do @@ -125,22 +111,8 @@ aarch64_fbsd_nat_target::store_registers (struct regcache *regcache, gdbarch *gdbarch = regcache->arch (); aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch); 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 - }; - - store_regset<uint64_t> (regcache, regnum, NT_ARM_TLS, - &aarch64_fbsd_tls_regset); - } + store_regset<uint64_t> (regcache, regnum, NT_ARM_TLS, + &aarch64_fbsd_tls_regset, tdep->tls_regnum); } /* Implement the target read_description method. */ diff --git a/gdb/aarch64-fbsd-tdep.c b/gdb/aarch64-fbsd-tdep.c index f37729a4d01..39d19355105 100644 --- a/gdb/aarch64-fbsd-tdep.c +++ b/gdb/aarch64-fbsd-tdep.c @@ -50,6 +50,14 @@ static const struct regcache_map_entry aarch64_fbsd_fpregmap[] = { 0 } }; +/* Register numbers are relative to tdep->tls_regnum. */ + +static const struct regcache_map_entry aarch64_fbsd_tls_regmap[] = + { + { 1, 0, 8 }, /* tpidr */ + { 0 } + }; + /* In a signal frame, sp points to a 'struct sigframe' which is defined as: @@ -135,6 +143,34 @@ const struct regset aarch64_fbsd_fpregset = regcache_supply_regset, regcache_collect_regset }; +static void +aarch64_fbsd_supply_tls_regset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *buf, size_t size) +{ + struct gdbarch *gdbarch = regcache->arch (); + aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch); + + regcache->supply_regset (regset, tdep->tls_regnum, regnum, buf, size); +} + +static void +aarch64_fbsd_collect_tls_regset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *buf, size_t size) +{ + struct gdbarch *gdbarch = regcache->arch (); + aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch); + + regcache->collect_regset (regset, tdep->tls_regnum, regnum, buf, size); +} + +const struct regset aarch64_fbsd_tls_regset = + { + aarch64_fbsd_tls_regmap, + aarch64_fbsd_supply_tls_regset, aarch64_fbsd_collect_tls_regset + }; + /* Implement the "iterate_over_regset_sections" gdbarch method. */ static void @@ -151,23 +187,9 @@ aarch64_fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, &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); - } + 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. */ diff --git a/gdb/aarch64-fbsd-tdep.h b/gdb/aarch64-fbsd-tdep.h index 7419ea6be03..eaf0774f595 100644 --- a/gdb/aarch64-fbsd-tdep.h +++ b/gdb/aarch64-fbsd-tdep.h @@ -37,5 +37,6 @@ extern const struct regset aarch64_fbsd_gregset; extern const struct regset aarch64_fbsd_fpregset; +extern const struct regset aarch64_fbsd_tls_regset; #endif /* AARCH64_FBSD_TDEP_H */
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