From eb14d4068893a301911485d732b4ae961c34e532 Mon Sep 17 00:00:00 2001 From: Sergio Durigan Junior Date: Fri, 9 Aug 2013 16:54:43 +0000 Subject: This patch implements the new gdbarch method gdbarch_gdb_signal_to_target. It will be used when one wants to convert between the internal GDB signal representation (enum gdb_signal) and the target's representation. The idea of this patch came from a chat between Pedro and I on IRC, plus the discussion of my patches to add the new $_exitsignal convenience variable: What I did was to investigate, on the Linux kernel, which targets shared the signal numbers definition with the generic definition, present at . For the record, I used linux-3.10-rc7 as the main source of information, always looking at /include/uapi/asm/signal.h>. For SIGRTMAX (which defaults to _NSIG in most cases), I had to look at different signal-related files, but most of them (except MIPS) were defined to 64 anyway. Then, with all the differences in hand, I implemented the bits on each target. 2013-08-09 Sergio Durigan Junior * linux-tdep.c: Define enum with generic signal numbers. (linux_gdb_signal_from_target): New function. (linux_gdb_signal_to_target): Likewise. (linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target methods to the functions above. * linux-tdep.h (linux_gdb_signal_from_target): New prototype. (linux_gdb_signal_to_target): Likewise. * alpha-linux-tdep.c: Define new enum with signals different from generic Linux kernel. (alpha_linux_gdb_signal_from_target): New function. (alpha_linux_gdb_signal_to_target): Likewise. (alpha_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target with the functions mentioned above. * avr-tdep.c: Define enum with differences between Linux kernel and AVR signals. (avr_linux_gdb_signal_from_target): New function. (avr_linux_gdb_signal_to_target): Likewise. (avr_gdbarch_init): Set gdbarch_gdb_signal_{to,from}_target to the functions mentioned above. * sparc-linux-tdep.c: Define enum with differences between SPARC and generic Linux kernel signal numbers. (sparc32_linux_gdb_signal_from_target): New function. (sparc32_linux_gdb_signal_to_target): Likewise. (sparc32_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target to the functions defined above. * xtensa-linux-tdep.c: Define enum with differences between Xtensa and Linux kernel generic signals. (xtensa_linux_gdb_signal_from_target): New function. (xtensa_linux_gdb_signal_to_target): Likewise. (xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target to the functions defined above. * mips-linux-tdep.c: Define enum with differences between signals in MIPS and Linux kernel generic ones. (mips_gdb_signal_to_target): New function. (mips_gdb_signal_from_target): Redefine to use new enum, handle only different signals from the Linux kernel generic. (mips_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target the functions defined above. * mips-linux-tdep.h (enum mips_signals): Remove. --- gdb/alpha-linux-tdep.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) (limited to 'gdb/alpha-linux-tdep.c') diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c index 9efc5bd..8cb087e 100644 --- a/gdb/alpha-linux-tdep.c +++ b/gdb/alpha-linux-tdep.c @@ -28,6 +28,35 @@ #include "linux-tdep.h" #include "alpha-tdep.h" +/* This enum represents the signals' numbers on the Alpha + architecture. It just contains the signal definitions which are + different from the generic implementation. + + It is derived from the file , + from the Linux kernel tree. */ + +enum + { + /* SIGABRT is the same as in the generic implementation, but is + defined here because SIGIOT depends on it. */ + ALPHA_LINUX_SIGABRT = 6, + ALPHA_LINUX_SIGEMT = 7, + ALPHA_LINUX_SIGBUS = 10, + ALPHA_LINUX_SIGSYS = 12, + ALPHA_LINUX_SIGURG = 16, + ALPHA_LINUX_SIGSTOP = 17, + ALPHA_LINUX_SIGTSTP = 18, + ALPHA_LINUX_SIGCONT = 19, + ALPHA_LINUX_SIGCHLD = 20, + ALPHA_LINUX_SIGIO = 23, + ALPHA_LINUX_SIGINFO = 29, + ALPHA_LINUX_SIGUSR1 = 30, + ALPHA_LINUX_SIGUSR2 = 31, + ALPHA_LINUX_SIGPOLL = ALPHA_LINUX_SIGIO, + ALPHA_LINUX_SIGPWR = ALPHA_LINUX_SIGINFO, + ALPHA_LINUX_SIGIOT = ALPHA_LINUX_SIGABRT, + }; + /* Under GNU/Linux, signal handler invocations can be identified by the designated code sequence that is used to return from a signal handler. In particular, the return address of a signal handler @@ -205,6 +234,114 @@ alpha_linux_regset_from_core_section (struct gdbarch *gdbarch, return NULL; } +/* Implementation of `gdbarch_gdb_signal_from_target', as defined in + gdbarch.h. */ + +static enum gdb_signal +alpha_linux_gdb_signal_from_target (struct gdbarch *gdbarch, + int signal) +{ + switch (signal) + { + case ALPHA_LINUX_SIGEMT: + return GDB_SIGNAL_EMT; + + case ALPHA_LINUX_SIGBUS: + return GDB_SIGNAL_BUS; + + case ALPHA_LINUX_SIGSYS: + return GDB_SIGNAL_SYS; + + case ALPHA_LINUX_SIGURG: + return GDB_SIGNAL_URG; + + case ALPHA_LINUX_SIGSTOP: + return GDB_SIGNAL_STOP; + + case ALPHA_LINUX_SIGTSTP: + return GDB_SIGNAL_TSTP; + + case ALPHA_LINUX_SIGCONT: + return GDB_SIGNAL_CONT; + + case ALPHA_LINUX_SIGCHLD: + return GDB_SIGNAL_CHLD; + + /* No way to differentiate between SIGIO and SIGPOLL. + Therefore, we just handle the first one. */ + case ALPHA_LINUX_SIGIO: + return GDB_SIGNAL_IO; + + /* No way to differentiate between SIGINFO and SIGPWR. + Therefore, we just handle the first one. */ + case ALPHA_LINUX_SIGINFO: + return GDB_SIGNAL_INFO; + + case ALPHA_LINUX_SIGUSR1: + return GDB_SIGNAL_USR1; + + case ALPHA_LINUX_SIGUSR2: + return GDB_SIGNAL_USR2; + } + + return linux_gdb_signal_from_target (gdbarch, signal); +} + +/* Implementation of `gdbarch_gdb_signal_to_target', as defined in + gdbarch.h. */ + +static int +alpha_linux_gdb_signal_to_target (struct gdbarch *gdbarch, + enum gdb_signal signal) +{ + switch (signal) + { + case GDB_SIGNAL_EMT: + return ALPHA_LINUX_SIGEMT; + + case GDB_SIGNAL_BUS: + return ALPHA_LINUX_SIGBUS; + + case GDB_SIGNAL_SYS: + return ALPHA_LINUX_SIGSYS; + + case GDB_SIGNAL_URG: + return ALPHA_LINUX_SIGURG; + + case GDB_SIGNAL_STOP: + return ALPHA_LINUX_SIGSTOP; + + case GDB_SIGNAL_TSTP: + return ALPHA_LINUX_SIGTSTP; + + case GDB_SIGNAL_CONT: + return ALPHA_LINUX_SIGCONT; + + case GDB_SIGNAL_CHLD: + return ALPHA_LINUX_SIGCHLD; + + case GDB_SIGNAL_IO: + return ALPHA_LINUX_SIGIO; + + case GDB_SIGNAL_INFO: + return ALPHA_LINUX_SIGINFO; + + case GDB_SIGNAL_USR1: + return ALPHA_LINUX_SIGUSR1; + + case GDB_SIGNAL_USR2: + return ALPHA_LINUX_SIGUSR2; + + case GDB_SIGNAL_POLL: + return ALPHA_LINUX_SIGPOLL; + + case GDB_SIGNAL_PWR: + return ALPHA_LINUX_SIGPWR; + } + + return linux_gdb_signal_to_target (gdbarch, signal); +} + static void alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { @@ -236,6 +373,11 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) set_gdbarch_regset_from_core_section (gdbarch, alpha_linux_regset_from_core_section); + + set_gdbarch_gdb_signal_from_target (gdbarch, + alpha_linux_gdb_signal_from_target); + set_gdbarch_gdb_signal_to_target (gdbarch, + alpha_linux_gdb_signal_to_target); } /* Provide a prototype to silence -Wmissing-prototypes. */ -- cgit v1.1