diff options
Diffstat (limited to 'gdb/arm-linux-nat.c')
| -rw-r--r-- | gdb/arm-linux-nat.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c index 8023026a209..0cfec203f5e 100644 --- a/gdb/arm-linux-nat.c +++ b/gdb/arm-linux-nat.c @@ -37,6 +37,13 @@ /* Prototypes for supply_gregset etc. */ #include "gregset.h" +/* Defines ps_err_e, struct ps_prochandle. */ +#include "gdb_proc_service.h" + +#ifndef PTRACE_GET_THREAD_AREA +#define PTRACE_GET_THREAD_AREA 22 +#endif + extern int arm_apcs_32; #define typeNone 0x00 @@ -694,6 +701,23 @@ arm_linux_kernel_u_size (void) return (sizeof (struct user)); } +/* Fetch the thread-local storage pointer for libthread_db. */ + +ps_err_e +ps_get_thread_area (const struct ps_prochandle *ph, + lwpid_t lwpid, int idx, void **base) +{ + if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 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 *)*base - idx); + + return PS_OK; +} + static unsigned int get_linux_version (unsigned int *vmajor, unsigned int *vminor, |