diff options
| author | John Baldwin <jhb@FreeBSD.org> | 2019-03-12 13:39:02 -0700 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2019-03-12 13:45:48 -0700 |
| commit | 8399425f5f472ad8e630bb30ad2dbefeddbb68b7 (patch) | |
| tree | 06996585158f9c0050039be45da18bacfbbdd25e /gdb | |
| parent | b0f87ed032bb68a9965de81cbf9fd676a83b9174 (diff) | |
| download | gdb-8399425f5f472ad8e630bb30ad2dbefeddbb68b7.zip gdb-8399425f5f472ad8e630bb30ad2dbefeddbb68b7.tar.gz gdb-8399425f5f472ad8e630bb30ad2dbefeddbb68b7.tar.bz2 | |
Support TLS variables on FreeBSD/powerpc.
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.
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 7 | ||||
| -rw-r--r-- | gdb/ppc-fbsd-tdep.c | 35 |
2 files changed, 42 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 741799d..fe7504c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,12 @@ 2019-03-12 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. + +2019-03-12 John Baldwin <jhb@FreeBSD.org> + * riscv-fbsd-tdep.c (riscv_fbsd_get_thread_local_address): New. (riscv_fbsd_init_abi): Install gdbarch "fetch_tls_load_module_address" and "get_thread_local_address" diff --git a/gdb/ppc-fbsd-tdep.c b/gdb/ppc-fbsd-tdep.c index c21a52c..290bd1f 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 |