diff options
Diffstat (limited to 'gdb/i386-linux-nat.c')
| -rw-r--r-- | gdb/i386-linux-nat.c | 67 |
1 files changed, 50 insertions, 17 deletions
diff --git a/gdb/i386-linux-nat.c b/gdb/i386-linux-nat.c index 81be404a0f4..e7a85fa70c7 100644 --- a/gdb/i386-linux-nat.c +++ b/gdb/i386-linux-nat.c @@ -23,6 +23,7 @@ #include "inferior.h" #include "gdbcore.h" #include "regcache.h" +#include "linux-nat.h" #include "gdb_assert.h" #include "gdb_string.h" @@ -319,7 +320,7 @@ static void store_regs (int tid, int regno) {} void supply_fpregset (elf_fpregset_t *fpregsetp) { - i387_supply_fsave ((char *) fpregsetp); + i387_supply_fsave ((const char *) fpregsetp, -1); dummy_sse_values (); } @@ -384,7 +385,7 @@ static void store_fpregs (int tid, int regno) {} void supply_fpxregset (elf_fpxregset_t *fpxregsetp) { - i387_supply_fxsave ((char *) fpxregsetp); + i387_supply_fxsave ((const char *) fpxregsetp, -1); } /* Fill register REGNO (if it is a floating-point or SSE register) in @@ -686,21 +687,6 @@ i386_linux_dr_set (int regnum, unsigned long value) perror_with_name ("Couldn't write debug register"); } -extern ps_err_e -ps_get_thread_area(const struct ps_prochandle *ph, - lwpid_t lwpid, int idx, void **base) -{ - unsigned long int desc[3]; -#define PTRACE_GET_THREAD_AREA 25 - - if (ptrace (PTRACE_GET_THREAD_AREA, - lwpid, (void *) idx, (unsigned long) &desc) < 0) - return PS_ERR; - - *(int *)base = desc[1]; - return PS_OK; -} - void i386_linux_dr_set_control (unsigned long control) { @@ -730,6 +716,46 @@ i386_linux_dr_get_status (void) } +/* Called by libthread_db. Returns a pointer to the thread local + storage (or its descriptor). */ + +ps_err_e +ps_get_thread_area (const struct ps_prochandle *ph, + lwpid_t lwpid, int idx, void **base) +{ + /* NOTE: cagney/2003-08-26: The definition of this buffer is found + in the kernel header <asm-i386/ldt.h>. It, after padding, is 4 x + 4 byte integers in size: `entry_number', `base_addr', `limit', + and a bunch of status bits. + + The values returned by this ptrace call should be part of the + regcache buffer, and ps_get_thread_area should channel its + request through the regcache. That way remote targets could + provide the value using the remote protocol and not this direct + call. + + Is this function needed? I'm guessing that the `base' is the + address of a a descriptor that libthread_db uses to find the + thread local address base that GDB needs. Perhaphs that + descriptor is defined by the ABI. Anyway, given that + libthread_db calls this function without prompting (gdb + requesting tls base) I guess it needs info in there anyway. */ + unsigned int desc[4]; + gdb_assert (sizeof (int) == 4); + +#ifndef PTRACE_GET_THREAD_AREA +#define PTRACE_GET_THREAD_AREA 25 +#endif + + if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, + (void *) idx, (unsigned long) &desc) < 0) + return PS_ERR; + + *(int *)base = desc[1]; + return PS_OK; +} + + /* Interpreting register set info found in core files. */ /* Provide registers to GDB from a core file. @@ -890,6 +916,13 @@ child_resume (ptid_t ptid, int step, enum target_signal signal) if (ptrace (request, pid, 0, target_signal_to_host (signal)) == -1) perror_with_name ("ptrace"); } + +void +child_post_startup_inferior (ptid_t ptid) +{ + i386_cleanup_dregs (); + linux_child_post_startup_inferior (ptid); +} /* Register that we are able to handle GNU/Linux ELF core file |