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70 lines
2.1 KiB
Plaintext
70 lines
2.1 KiB
Plaintext
commit 8399425f5f472ad8e630bb30ad2dbefeddbb68b7
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Author: John Baldwin <jhb@FreeBSD.org>
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Date: Tue Mar 12 13:39:02 2019 -0700
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Support TLS variables on FreeBSD/powerpc.
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Derive the pointer to the DTV array from the %r2 register on 32-bit
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powerpc and %r13 on 64-bit powerpc.
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gdb/ChangeLog:
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* ppc-fbsd-tdep.c (ppcfbsd_get_thread_local_address): New.
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(ppcfbsd_init_abi): Install gdbarch
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"fetch_tls_load_module_address" and "get_thread_local_address"
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methods.
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diff --git gdb/ppc-fbsd-tdep.c gdb/ppc-fbsd-tdep.c
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index c21a52c898..290bd1fd88 100644
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--- gdb/ppc-fbsd-tdep.c
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+++ gdb/ppc-fbsd-tdep.c
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@@ -279,6 +279,39 @@ ppcfbsd_return_value (struct gdbarch *gdbarch, struct value *function,
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regcache, readbuf, writebuf);
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}
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+/* Implement the "get_thread_local_address" gdbarch method. */
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+
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+static CORE_ADDR
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+ppcfbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid,
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+ CORE_ADDR lm_addr, CORE_ADDR offset)
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+{
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+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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+ struct regcache *regcache;
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+ int tp_offset, tp_regnum;
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+
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+ regcache = get_thread_arch_regcache (ptid, gdbarch);
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+
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+ if (tdep->wordsize == 4)
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+ {
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+ tp_offset = 0x7008;
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+ tp_regnum = PPC_R0_REGNUM + 2;
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+ }
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+ else
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+ {
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+ tp_offset = 0x7010;
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+ tp_regnum = PPC_R0_REGNUM + 13;
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+ }
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+ target_fetch_registers (regcache, tp_regnum);
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+
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+ ULONGEST tp;
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+ if (regcache->cooked_read (tp_regnum, &tp) != REG_VALID)
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+ error (_("Unable to fetch tcb pointer"));
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+
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+ /* tp points to the end of the TCB block. The first member of the
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+ TCB is the pointer to the DTV array. */
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+ CORE_ADDR dtv_addr = tp - tp_offset;
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+ return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset);
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+}
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static void
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ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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@@ -322,6 +355,8 @@ ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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set_gdbarch_fetch_tls_load_module_address (gdbarch,
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svr4_fetch_objfile_link_map);
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+ set_gdbarch_get_thread_local_address (gdbarch,
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+ ppcfbsd_get_thread_local_address);
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}
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void
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