espressif/binutils-gdb
1
0
Fork 0
mirror of https://github.com/espressif/binutils-gdb.git synced 2025-06-23 11:39:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

Support TLS variables on FreeBSD/Aarch64.

Browse Source 
Derive the pointer to the DTV array from the tpidr register.
This commit is contained in:
John Baldwin
2022-05-03 16:05:10 -07:00
parent 0a765c1a8e
commit f9fbb7636a
1 changed files with 33 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
gdb/aarch64-fbsd-tdep.c
View File

@ -23,6 +23,7 @@
#include "fbsd-tdep.h"
#include "aarch64-tdep.h"
#include "aarch64-fbsd-tdep.h"
#include "inferior.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "target.h"
@ -180,6 +181,30 @@ aarch64_fbsd_core_read_description (struct gdbarch *gdbarch,
return aarch64_read_description (0, false, false, tls != nullptr);
}
/* Implement the get_thread_local_address gdbarch method. */
static CORE_ADDR
aarch64_fbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid,
CORE_ADDR lm_addr, CORE_ADDR offset)
{
aarch64_gdbarch_tdep *tdep = (aarch64_gdbarch_tdep *) gdbarch_tdep (gdbarch);
struct regcache *regcache;
regcache = get_thread_arch_regcache (current_inferior ()->process_target (),
ptid, gdbarch);
target_fetch_registers (regcache, tdep->tls_regnum);
ULONGEST tpidr;
if (regcache->cooked_read (tdep->tls_regnum, &tpidr) != REG_VALID)
error (_("Unable to fetch %%tpidr"));
/* %tpidr points to the TCB whose first member is the dtv
pointer. */
CORE_ADDR dtv_addr = tpidr;
return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset);
}
/* Implement the 'init_osabi' method of struct gdb_osabi_handler. */
static void
@ -202,6 +227,14 @@ aarch64_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
(gdbarch, aarch64_fbsd_iterate_over_regset_sections);
set_gdbarch_core_read_description (gdbarch,
aarch64_fbsd_core_read_description);
if (tdep->has_tls ())
{
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
set_gdbarch_get_thread_local_address
(gdbarch, aarch64_fbsd_get_thread_local_address);
}
}
void _initialize_aarch64_fbsd_tdep ();