From: John Baldwin <jhb@FreeBSD.org>
To: gdb-patches@sourceware.org
Subject: [PATCH v2 11/11] Support TLS variables on FreeBSD/powerpc.
Date: Sat, 09 Feb 2019 00:42:00 -0000 [thread overview]
Message-ID: <b6a17e3e36bbad377989c525d7532f3b6a2bf307.1549672588.git.jhb@FreeBSD.org> (raw)
In-Reply-To: <cover.1549672588.git.jhb@FreeBSD.org>
Derive the pointer to the DTV array from the %r2 register on 32-bit
powerpc and %r13 on 64-bit powerpc.
gdb/ChangeLog:
* ppc-fbsd-tdep.c (ppcfbsd_get_thread_local_address): New.
(ppcfbsd_init_abi): Install gdbarch
"fetch_tls_load_module_address" and "get_thread_local_address"
methods.
---
gdb/ChangeLog | 7 +++++++
gdb/ppc-fbsd-tdep.c | 35 +++++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6fa12ff815..90070b4039 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2019-02-08 John Baldwin <jhb@FreeBSD.org>
+
+ * ppc-fbsd-tdep.c (ppcfbsd_get_thread_local_address): New.
+ (ppcfbsd_init_abi): Install gdbarch
+ "fetch_tls_load_module_address" and "get_thread_local_address"
+ methods.
+
2019-02-08 John Baldwin <jhb@FreeBSD.org>
* riscv-fbsd-tdep.c (riscv_fbsd_get_thread_local_address): New.
diff --git a/gdb/ppc-fbsd-tdep.c b/gdb/ppc-fbsd-tdep.c
index c21a52c898..290bd1fd88 100644
--- a/gdb/ppc-fbsd-tdep.c
+++ b/gdb/ppc-fbsd-tdep.c
@@ -279,6 +279,39 @@ ppcfbsd_return_value (struct gdbarch *gdbarch, struct value *function,
regcache, readbuf, writebuf);
}
+/* Implement the "get_thread_local_address" gdbarch method. */
+
+static CORE_ADDR
+ppcfbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid,
+ CORE_ADDR lm_addr, CORE_ADDR offset)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ struct regcache *regcache;
+ int tp_offset, tp_regnum;
+
+ regcache = get_thread_arch_regcache (ptid, gdbarch);
+
+ if (tdep->wordsize == 4)
+ {
+ tp_offset = 0x7008;
+ tp_regnum = PPC_R0_REGNUM + 2;
+ }
+ else
+ {
+ tp_offset = 0x7010;
+ tp_regnum = PPC_R0_REGNUM + 13;
+ }
+ target_fetch_registers (regcache, tp_regnum);
+
+ ULONGEST tp;
+ if (regcache->cooked_read (tp_regnum, &tp) != REG_VALID)
+ error (_("Unable to fetch tcb pointer"));
+
+ /* tp points to the end of the TCB block. The first member of the
+ TCB is the pointer to the DTV array. */
+ CORE_ADDR dtv_addr = tp - tp_offset;
+ return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset);
+}
static void
ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@@ -322,6 +355,8 @@ ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+ set_gdbarch_get_thread_local_address (gdbarch,
+ ppcfbsd_get_thread_local_address);
}
void
--
2.19.2
next prev parent reply other threads:[~2019-02-09 0:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-09 0:42 [PATCH v2 00/11] Support for thread-local variables on FreeBSD John Baldwin
2019-02-09 0:42 ` [PATCH v2 03/11] Handle an edge case for minisym TLS variable lookups John Baldwin
2019-02-09 0:42 ` [PATCH v2 07/11] Add a helper function to resolve TLS variable addresses for FreeBSD John Baldwin
2019-03-07 16:18 ` Simon Marchi
2019-02-09 0:42 ` [PATCH v2 09/11] Support TLS variables on FreeBSD/i386 John Baldwin
2019-02-09 0:42 ` [PATCH v2 02/11] Support fs_base and gs_base " John Baldwin
2019-02-09 0:42 ` [PATCH v2 01/11] Support the fs_base and gs_base registers on i386 John Baldwin
2019-02-09 0:42 ` [PATCH v2 08/11] Support TLS variables on FreeBSD/amd64 John Baldwin
2019-02-09 0:42 ` John Baldwin [this message]
2019-03-07 16:26 ` [PATCH v2 11/11] Support TLS variables on FreeBSD/powerpc Simon Marchi
2019-02-09 0:42 ` [PATCH v2 06/11] Add a more general version of lookup_struct_elt_type John Baldwin
2019-02-09 1:08 ` John Baldwin
2019-02-11 10:27 ` Philipp Rudo
2019-02-11 17:44 ` John Baldwin
2019-03-07 15:53 ` Simon Marchi
2019-03-08 0:04 ` John Baldwin
2019-03-08 0:32 ` Pedro Alves
2019-03-08 18:39 ` John Baldwin
2019-02-09 0:50 ` [PATCH v2 04/11] Add a new gdbarch method to resolve the address of TLS variables John Baldwin
2019-03-07 16:08 ` Simon Marchi
2019-03-07 23:50 ` John Baldwin
2019-03-08 2:55 ` Simon Marchi
2019-03-08 18:39 ` John Baldwin
2019-02-09 0:50 ` [PATCH v2 05/11] Remove code disabled since at least 1999 from lookup_struct_elt_type John Baldwin
2019-03-07 16:25 ` Simon Marchi
2019-02-09 0:50 ` [PATCH v2 10/11] Support TLS variables on FreeBSD/riscv John Baldwin
2019-02-22 17:22 ` [PING][PATCH v2 00/11] Support for thread-local variables on FreeBSD John Baldwin
2019-03-12 20:21 ` Simon Marchi
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