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devel/gdb/files/commit-f5424cfa7e
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| fbsd:nokeywords | null | yes \ No newline at end of property |
| svn:eol-style | null | native \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| commit f5424cfa7e9337a6cb02a1f83c9feea0995c5350 | |||||
| Author: John Baldwin <jhb@FreeBSD.org> | |||||
| Date: Tue Mar 12 13:39:02 2019 -0700 | |||||
| Support TLS variables on FreeBSD/amd64. | |||||
| Use the fs_base register to fetch the address of a thread's tcb and | |||||
| calculate the address of the DTV array. This value is then passed to | |||||
| fbsd_get_thread_local_address to compute the final variable address. | |||||
| Note that fs_base is currently only available via the native target as | |||||
| core dumps on FreeBSD do not store the value of fs_base. | |||||
| gdb/ChangeLog: | |||||
| * amd64-fbsd-tdep.c (amd64fbsd_get_thread_local_address): New. | |||||
| (amd64fbsd_init_abi): Install gdbarch | |||||
| "fetch_tls_load_module_address" and "get_thread_local_address" | |||||
| methods. | |||||
| diff --git gdb/amd64-fbsd-tdep.c gdb/amd64-fbsd-tdep.c | |||||
| index 403e65022d..7e2e9edf21 100644 | |||||
| --- gdb/amd64-fbsd-tdep.c | |||||
| +++ gdb/amd64-fbsd-tdep.c | |||||
| @@ -204,6 +204,26 @@ amd64fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, | |||||
| &amd64fbsd_xstateregset, "XSAVE extended state", cb_data); | |||||
| } | |||||
| +/* Implement the get_thread_local_address gdbarch method. */ | |||||
| + | |||||
| +static CORE_ADDR | |||||
| +amd64fbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid, | |||||
| + CORE_ADDR lm_addr, CORE_ADDR offset) | |||||
| +{ | |||||
| + struct regcache *regcache; | |||||
| + | |||||
| + regcache = get_thread_arch_regcache (ptid, gdbarch); | |||||
| + | |||||
| + target_fetch_registers (regcache, AMD64_FSBASE_REGNUM); | |||||
| + | |||||
| + ULONGEST fsbase; | |||||
| + if (regcache->cooked_read (AMD64_FSBASE_REGNUM, &fsbase) != REG_VALID) | |||||
| + error (_("Unable to fetch %%fsbase")); | |||||
| + | |||||
| + CORE_ADDR dtv_addr = fsbase + gdbarch_ptr_bit (gdbarch) / 8; | |||||
| + return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset); | |||||
| +} | |||||
| + | |||||
| static void | |||||
| amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |||||
| { | |||||
| @@ -241,6 +261,11 @@ amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |||||
| /* FreeBSD uses SVR4-style shared libraries. */ | |||||
| set_solib_svr4_fetch_link_map_offsets | |||||
| (gdbarch, svr4_lp64_fetch_link_map_offsets); | |||||
| + | |||||
| + set_gdbarch_fetch_tls_load_module_address (gdbarch, | |||||
| + svr4_fetch_objfile_link_map); | |||||
| + set_gdbarch_get_thread_local_address (gdbarch, | |||||
| + amd64fbsd_get_thread_local_address); | |||||
| } | |||||
| void | |||||