diff options
| -rw-r--r-- | gdb/ChangeLog | 21 | ||||
| -rw-r--r-- | gdb/fbsd-tdep.c | 272 |
2 files changed, 293 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b9d2c14..e646fd5 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,24 @@ +2021-06-03 John Baldwin <jhb@FreeBSD.org> + + * fbsd-tdep.c (FBSD_SI_USER, FBSD_SI_QUEUE, FBSD_SI_TIMER) + (FBSD_SI_ASYNCIO, FBSD_SI_MESGQ, FBSD_SI_KERNEL, FBSD_SI_LWP) + (FBSD_ILL_ILLOPC, FBSD_ILL_ILLOPN, FBSD_ILL_ILLADR) + (FBSD_ILL_ILLTRP, FBSD_ILL_PRVOPC, FBSD_ILL_PRVREG) + (FBSD_ILL_COPROC, FBSD_ILL_BADSTK, FBSD_BUS_ADRALN) + (FBSD_BUS_ADRERR, FBSD_BUS_OBJERR, FBSD_BUS_OOMERR) + (FBSD_SEGV_MAPERR, FBSD_SEGV_ACCERR, FBSD_SEGV_PKUERR) + (FBSD_FPE_INTOVF, FBSD_FPE_INTDIV, FBSD_FPE_FLTDIV) + (FBSD_FPE_FLTOVF, FBSD_FPE_FLTUND, FBSD_FPE_FLTRES) + (FBSD_FPE_FLTINV, FBSD_FPE_FLTSUB, FBSD_TRAP_BRKPT) + (FBSD_TRAP_TRACE, FBSD_TRAP_DTRACE, FBSD_TRAP_CAP) + (FBSD_CLD_EXITED, FBSD_CLD_KILLED, FBSD_CLD_DUMPED) + (FBSD_CLD_TRAPPED, FBSD_CLD_STOPPED, FBSD_CLD_CONTINUED) + (FBSD_POLL_IN, FBSD_POLL_OUT, FBSD_POLL_MSG, FBSD_POLL_ERR) + (FBSD_POLL_PRI, FBSD_POLL_HUP, fbsd_signal_cause) + (fbsd_report_signal_info): New. + (fbsd_init_abi): Use fbsd_report_signal_info as gdbarch + report_signal_info method. + 2021-06-03 Magne Hov <mhov@undo.io> * MAINTAINERS (Write After Approval): Add Magne Hov. diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c index 6cab31d..5cb6fa3 100644 --- a/gdb/fbsd-tdep.c +++ b/gdb/fbsd-tdep.c @@ -75,6 +75,63 @@ enum FREEBSD_SIGRTMAX = 126, }; +/* Constants for values of si_code as defined in FreeBSD's + <sys/signal.h>. */ + +#define FBSD_SI_USER 0x10001 +#define FBSD_SI_QUEUE 0x10002 +#define FBSD_SI_TIMER 0x10003 +#define FBSD_SI_ASYNCIO 0x10004 +#define FBSD_SI_MESGQ 0x10005 +#define FBSD_SI_KERNEL 0x10006 +#define FBSD_SI_LWP 0x10007 + +#define FBSD_ILL_ILLOPC 1 +#define FBSD_ILL_ILLOPN 2 +#define FBSD_ILL_ILLADR 3 +#define FBSD_ILL_ILLTRP 4 +#define FBSD_ILL_PRVOPC 5 +#define FBSD_ILL_PRVREG 6 +#define FBSD_ILL_COPROC 7 +#define FBSD_ILL_BADSTK 8 + +#define FBSD_BUS_ADRALN 1 +#define FBSD_BUS_ADRERR 2 +#define FBSD_BUS_OBJERR 3 +#define FBSD_BUS_OOMERR 100 + +#define FBSD_SEGV_MAPERR 1 +#define FBSD_SEGV_ACCERR 2 +#define FBSD_SEGV_PKUERR 100 + +#define FBSD_FPE_INTOVF 1 +#define FBSD_FPE_INTDIV 2 +#define FBSD_FPE_FLTDIV 3 +#define FBSD_FPE_FLTOVF 4 +#define FBSD_FPE_FLTUND 5 +#define FBSD_FPE_FLTRES 6 +#define FBSD_FPE_FLTINV 7 +#define FBSD_FPE_FLTSUB 8 + +#define FBSD_TRAP_BRKPT 1 +#define FBSD_TRAP_TRACE 2 +#define FBSD_TRAP_DTRACE 3 +#define FBSD_TRAP_CAP 4 + +#define FBSD_CLD_EXITED 1 +#define FBSD_CLD_KILLED 2 +#define FBSD_CLD_DUMPED 3 +#define FBSD_CLD_TRAPPED 4 +#define FBSD_CLD_STOPPED 5 +#define FBSD_CLD_CONTINUED 6 + +#define FBSD_POLL_IN 1 +#define FBSD_POLL_OUT 2 +#define FBSD_POLL_MSG 3 +#define FBSD_POLL_ERR 4 +#define FBSD_POLL_PRI 5 +#define FBSD_POLL_HUP 6 + /* FreeBSD kernels 12.0 and later include a copy of the 'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace operation in an ELF core note (NT_FREEBSD_PTLWPINFO) for each LWP. @@ -1988,6 +2045,220 @@ fbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) return 0; } +/* Return description of signal code or nullptr. */ + +static const char * +fbsd_signal_cause (enum gdb_signal siggnal, int code) +{ + /* Signal-independent causes. */ + switch (code) + { + case FBSD_SI_USER: + return _("Sent by kill()"); + case FBSD_SI_QUEUE: + return _("Sent by sigqueue()"); + case FBSD_SI_TIMER: + return _("Timer expired"); + case FBSD_SI_ASYNCIO: + return _("Asynchronous I/O request completed"); + case FBSD_SI_MESGQ: + return _("Message arrived on empty message queue"); + case FBSD_SI_KERNEL: + return _("Sent by kernel"); + case FBSD_SI_LWP: + return _("Sent by thr_kill()"); + } + + switch (siggnal) + { + case GDB_SIGNAL_ILL: + switch (code) + { + case FBSD_ILL_ILLOPC: + return _("Illegal opcode"); + case FBSD_ILL_ILLOPN: + return _("Illegal operand"); + case FBSD_ILL_ILLADR: + return _("Illegal addressing mode"); + case FBSD_ILL_ILLTRP: + return _("Illegal trap"); + case FBSD_ILL_PRVOPC: + return _("Privileged opcode"); + case FBSD_ILL_PRVREG: + return _("Privileged register"); + case FBSD_ILL_COPROC: + return _("Coprocessor error"); + case FBSD_ILL_BADSTK: + return _("Internal stack error"); + } + break; + case GDB_SIGNAL_BUS: + switch (code) + { + case FBSD_BUS_ADRALN: + return _("Invalid address alignment"); + case FBSD_BUS_ADRERR: + return _("Address not present"); + case FBSD_BUS_OBJERR: + return _("Object-specific hardware error"); + case FBSD_BUS_OOMERR: + return _("Out of memory"); + } + break; + case GDB_SIGNAL_SEGV: + switch (code) + { + case FBSD_SEGV_MAPERR: + return _("Address not mapped to object"); + case FBSD_SEGV_ACCERR: + return _("Invalid permissions for mapped object"); + case FBSD_SEGV_PKUERR: + return _("PKU violation"); + } + break; + case GDB_SIGNAL_FPE: + switch (code) + { + case FBSD_FPE_INTOVF: + return _("Integer overflow"); + case FBSD_FPE_INTDIV: + return _("Integer divide by zero"); + case FBSD_FPE_FLTDIV: + return _("Floating point divide by zero"); + case FBSD_FPE_FLTOVF: + return _("Floating point overflow"); + case FBSD_FPE_FLTUND: + return _("Floating point underflow"); + case FBSD_FPE_FLTRES: + return _("Floating point inexact result"); + case FBSD_FPE_FLTINV: + return _("Invalid floating point operation"); + case FBSD_FPE_FLTSUB: + return _("Subscript out of range"); + } + break; + case GDB_SIGNAL_TRAP: + switch (code) + { + case FBSD_TRAP_BRKPT: + return _("Breakpoint"); + case FBSD_TRAP_TRACE: + return _("Trace trap"); + case FBSD_TRAP_DTRACE: + return _("DTrace-induced trap"); + case FBSD_TRAP_CAP: + return _("Capability violation"); + } + break; + case GDB_SIGNAL_CHLD: + switch (code) + { + case FBSD_CLD_EXITED: + return _("Child has exited"); + case FBSD_CLD_KILLED: + return _("Child has terminated abnormally"); + case FBSD_CLD_DUMPED: + return _("Child has dumped core"); + case FBSD_CLD_TRAPPED: + return _("Traced child has trapped"); + case FBSD_CLD_STOPPED: + return _("Child has stopped"); + case FBSD_CLD_CONTINUED: + return _("Stopped child has continued"); + } + break; + case GDB_SIGNAL_POLL: + switch (code) + { + case FBSD_POLL_IN: + return _("Data input available"); + case FBSD_POLL_OUT: + return _("Output buffers available"); + case FBSD_POLL_MSG: + return _("Input message available"); + case FBSD_POLL_ERR: + return _("I/O error"); + case FBSD_POLL_PRI: + return _("High priority input available"); + case FBSD_POLL_HUP: + return _("Device disconnected"); + } + break; + } + + return nullptr; +} + +/* Report additional details for a signal stop. */ + +static void +fbsd_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, + enum gdb_signal siggnal) +{ + LONGEST code, mqd, pid, status, timerid, uid; + + try + { + code = parse_and_eval_long ("$_siginfo.si_code"); + pid = parse_and_eval_long ("$_siginfo.si_pid"); + uid = parse_and_eval_long ("$_siginfo.si_uid"); + status = parse_and_eval_long ("$_siginfo.si_status"); + timerid = parse_and_eval_long ("$_siginfo._reason._timer.si_timerid"); + mqd = parse_and_eval_long ("$_siginfo._reason._mesgq.si_mqd"); + } + catch (const gdb_exception_error &e) + { + return; + } + + const char *meaning = fbsd_signal_cause (siggnal, code); + if (meaning == nullptr) + return; + + uiout->text (".\n"); + uiout->field_string ("sigcode-meaning", meaning); + + switch (code) + { + case FBSD_SI_USER: + case FBSD_SI_QUEUE: + case FBSD_SI_LWP: + uiout->text (" from pid "); + uiout->field_string ("sending-pid", plongest (pid)); + uiout->text (" and user "); + uiout->field_string ("sending-uid", plongest (uid)); + return; + case FBSD_SI_TIMER: + uiout->text (": timerid "); + uiout->field_string ("timerid", plongest (timerid)); + return; + case FBSD_SI_MESGQ: + uiout->text (": message queue "); + uiout->field_string ("message-queue", plongest (mqd)); + return; + case FBSD_SI_ASYNCIO: + return; + } + + if (siggnal == GDB_SIGNAL_CHLD) + { + uiout->text (": pid "); + uiout->field_string ("child-pid", plongest (pid)); + uiout->text (", uid "); + uiout->field_string ("child-uid", plongest (uid)); + if (code == FBSD_CLD_EXITED) + { + uiout->text (", exit status "); + uiout->field_string ("exit-status", plongest (status)); + } + else + { + uiout->text (", signal "); + uiout->field_string ("signal", plongest (status)); + } + } +} + /* To be called from GDB_OSABI_FREEBSD handlers. */ void @@ -2002,6 +2273,7 @@ fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type); set_gdbarch_gdb_signal_from_target (gdbarch, fbsd_gdb_signal_from_target); set_gdbarch_gdb_signal_to_target (gdbarch, fbsd_gdb_signal_to_target); + set_gdbarch_report_signal_info (gdbarch, fbsd_report_signal_info); set_gdbarch_skip_solib_resolver (gdbarch, fbsd_skip_solib_resolver); /* `catch syscall' */ |