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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-07-02 15:10:58 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2015-08-21 15:39:40 +0300 |
| commit | 40045d91812b25c88c8275b8c08d27c234b68ba8 (patch) | |
| tree | 77fd1aad5678f40d99e53dd42940555426e3f5be /gdb/gdbserver/linux-xtensa-low.c | |
| parent | ab4e4ed5dabc378c06ee647afd5793513393ae3f (diff) | |
| download | gdb-40045d91812b25c88c8275b8c08d27c234b68ba8.zip gdb-40045d91812b25c88c8275b8c08d27c234b68ba8.tar.gz gdb-40045d91812b25c88c8275b8c08d27c234b68ba8.tar.bz2 | |
xtensa: implement NPTL helpers
These changes allow debugging multithreaded NPTL xtensa applications.
2015-08-20 Max Filippov <jcmvbkbc@gmail.com>
gdb/gdbserver/
* configure.srv (xtensa*-*-linux*): Add srv_linux_thread_db=yes.
* linux-xtensa-low.c (arch/xtensa.h gdb_proc_service.h): New
#includes.
(ps_get_thread_area): New function.
2015-08-20 Max Filippov <jcmvbkbc@gmail.com>
gdb/
* arch/xtensa.h: New file.
* xtensa-linux-nat.c (gdb_proc_service.h): New #include.
(ps_get_thread_area): New function.
* xtensa-linux-tdep.c (xtensa_linux_init_abi): Add call to
set_gdbarch_fetch_tls_load_module_address to enable TLS support.
* xtensa-tdep.c (osabi.h): New #include.
(xtensa_gdbarch_init): Call gdbarch_init_osabi to register
xtensa-specific hooks.
* xtensa-tdep.h (struct xtensa_elf_gregset_t): Add threadptr
member and move the structure to arch/xtensa.h.
Diffstat (limited to 'gdb/gdbserver/linux-xtensa-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-xtensa-low.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gdb/gdbserver/linux-xtensa-low.c b/gdb/gdbserver/linux-xtensa-low.c index 4daccee..debe467 100644 --- a/gdb/gdbserver/linux-xtensa-low.c +++ b/gdb/gdbserver/linux-xtensa-low.c @@ -26,6 +26,8 @@ extern const struct target_desc *tdesc_xtensa; #include <asm/ptrace.h> #include <xtensa-config.h> +#include "arch/xtensa.h" +#include "gdb_proc_service.h" #include "xtensa-xtregs.c" @@ -179,6 +181,25 @@ xtensa_breakpoint_at (CORE_ADDR where) xtensa_breakpoint, xtensa_breakpoint_len) == 0; } +/* Called by libthread_db. */ + +ps_err_e +ps_get_thread_area (const struct ps_prochandle *ph, + lwpid_t lwpid, int idx, void **base) +{ + xtensa_elf_gregset_t regs; + + if (ptrace (PTRACE_GETREGS, lwpid, NULL, ®s) != 0) + return PS_ERR; + + /* IDX is the bias from the thread pointer to the beginning of the + thread descriptor. It has to be subtracted due to implementation + quirks in libthread_db. */ + *base = (void *) ((char *) regs.threadptr - idx); + + return PS_OK; +} + static struct regsets_info xtensa_regsets_info = { xtensa_regsets, /* regsets */ |