From c92b51775c3e27a5efa0fff83ebc8d75c92fc22b Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 12 Apr 2012 21:06:12 +0000 Subject: [PATCH] Convert siginfo for x32 in gdbserver * linux-x86-low.c (compat_x32_clock_t): New. (compat_x32_siginfo_t): Likewise. (compat_x32_siginfo_from_siginfo): Likewise. (siginfo_from_compat_x32_siginfo): Likewise. (linux_is_elf64): Likewise. (x86_siginfo_fixup): Call compat_x32_siginfo_from_siginfo and siginfo_from_compat_x32_siginfo for x32. (x86_arch_setup): Set linux_is_elf64. --- gdb/gdbserver/ChangeLog | 11 ++ gdb/gdbserver/linux-x86-low.c | 195 ++++++++++++++++++++++++++++++++++ 2 files changed, 206 insertions(+) diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index f1a61650c56..eff47b1086b 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,3 +1,14 @@ +2012-04-12 H.J. Lu + + * linux-x86-low.c (compat_x32_clock_t): New. + (compat_x32_siginfo_t): Likewise. + (compat_x32_siginfo_from_siginfo): Likewise. + (siginfo_from_compat_x32_siginfo): Likewise. + (linux_is_elf64): Likewise. + (x86_siginfo_fixup): Call compat_x32_siginfo_from_siginfo + and siginfo_from_compat_x32_siginfo for x32. + (x86_arch_setup): Set linux_is_elf64. + 2012-04-12 H.J. Lu PR gdb/13969 diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c index 3dcae007baf..1e65e978491 100644 --- a/gdb/gdbserver/linux-x86-low.c +++ b/gdb/gdbserver/linux-x86-low.c @@ -776,6 +776,67 @@ typedef struct compat_siginfo } _sifields; } compat_siginfo_t; +/* For x32, clock_t in _sigchld is 64bit aligned at 4 bytes. */ +typedef long __attribute__ ((__aligned__ (4))) compat_x32_clock_t; + +typedef struct compat_x32_siginfo +{ + int si_signo; + int si_errno; + int si_code; + + union + { + int _pad[((128 / sizeof (int)) - 3)]; + + /* kill() */ + struct + { + unsigned int _pid; + unsigned int _uid; + } _kill; + + /* POSIX.1b timers */ + struct + { + compat_timer_t _tid; + int _overrun; + compat_sigval_t _sigval; + } _timer; + + /* POSIX.1b signals */ + struct + { + unsigned int _pid; + unsigned int _uid; + compat_sigval_t _sigval; + } _rt; + + /* SIGCHLD */ + struct + { + unsigned int _pid; + unsigned int _uid; + int _status; + compat_x32_clock_t _utime; + compat_x32_clock_t _stime; + } _sigchld; + + /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ + struct + { + unsigned int _addr; + } _sigfault; + + /* SIGPOLL */ + struct + { + int _band; + int _fd; + } _sigpoll; + } _sifields; +} compat_x32_siginfo_t __attribute__ ((__aligned__ (8))); + #define cpt_si_pid _sifields._kill._pid #define cpt_si_uid _sifields._kill._uid #define cpt_si_timerid _sifields._timer._tid @@ -909,6 +970,122 @@ siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) } } +static void +compat_x32_siginfo_from_siginfo (compat_x32_siginfo_t *to, + siginfo_t *from) +{ + memset (to, 0, sizeof (*to)); + + to->si_signo = from->si_signo; + to->si_errno = from->si_errno; + to->si_code = from->si_code; + + if (to->si_code == SI_TIMER) + { + to->cpt_si_timerid = from->si_timerid; + to->cpt_si_overrun = from->si_overrun; + to->cpt_si_ptr = (intptr_t) from->si_ptr; + } + else if (to->si_code == SI_USER) + { + to->cpt_si_pid = from->si_pid; + to->cpt_si_uid = from->si_uid; + } + else if (to->si_code < 0) + { + to->cpt_si_pid = from->si_pid; + to->cpt_si_uid = from->si_uid; + to->cpt_si_ptr = (intptr_t) from->si_ptr; + } + else + { + switch (to->si_signo) + { + case SIGCHLD: + to->cpt_si_pid = from->si_pid; + to->cpt_si_uid = from->si_uid; + to->cpt_si_status = from->si_status; + to->cpt_si_utime = from->si_utime; + to->cpt_si_stime = from->si_stime; + break; + case SIGILL: + case SIGFPE: + case SIGSEGV: + case SIGBUS: + to->cpt_si_addr = (intptr_t) from->si_addr; + break; + case SIGPOLL: + to->cpt_si_band = from->si_band; + to->cpt_si_fd = from->si_fd; + break; + default: + to->cpt_si_pid = from->si_pid; + to->cpt_si_uid = from->si_uid; + to->cpt_si_ptr = (intptr_t) from->si_ptr; + break; + } + } +} + +static void +siginfo_from_compat_x32_siginfo (siginfo_t *to, + compat_x32_siginfo_t *from) +{ + memset (to, 0, sizeof (*to)); + + to->si_signo = from->si_signo; + to->si_errno = from->si_errno; + to->si_code = from->si_code; + + if (to->si_code == SI_TIMER) + { + to->si_timerid = from->cpt_si_timerid; + to->si_overrun = from->cpt_si_overrun; + to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; + } + else if (to->si_code == SI_USER) + { + to->si_pid = from->cpt_si_pid; + to->si_uid = from->cpt_si_uid; + } + else if (to->si_code < 0) + { + to->si_pid = from->cpt_si_pid; + to->si_uid = from->cpt_si_uid; + to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; + } + else + { + switch (to->si_signo) + { + case SIGCHLD: + to->si_pid = from->cpt_si_pid; + to->si_uid = from->cpt_si_uid; + to->si_status = from->cpt_si_status; + to->si_utime = from->cpt_si_utime; + to->si_stime = from->cpt_si_stime; + break; + case SIGILL: + case SIGFPE: + case SIGSEGV: + case SIGBUS: + to->si_addr = (void *) (intptr_t) from->cpt_si_addr; + break; + case SIGPOLL: + to->si_band = from->cpt_si_band; + to->si_fd = from->cpt_si_fd; + break; + default: + to->si_pid = from->cpt_si_pid; + to->si_uid = from->cpt_si_uid; + to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; + break; + } + } +} + +/* Is this process 64-bit? */ +static int linux_is_elf64; #endif /* __x86_64__ */ /* Convert a native/host siginfo object, into/from the siginfo in the @@ -932,6 +1109,21 @@ x86_siginfo_fixup (siginfo_t *native, void *inf, int direction) else siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); + return 1; + } + /* No fixup for native x32 GDB. */ + else if (!linux_is_elf64 && sizeof (void *) == 8) + { + if (sizeof (siginfo_t) != sizeof (compat_x32_siginfo_t)) + fatal ("unexpected difference in siginfo"); + + if (direction == 0) + compat_x32_siginfo_from_siginfo ((struct compat_x32_siginfo *) inf, + native); + else + siginfo_from_compat_x32_siginfo (native, + (struct compat_x32_siginfo *) inf); + return 1; } #endif @@ -1138,9 +1330,12 @@ x86_arch_setup (void) /* Amd64 has 16 xmm regs. */ num_xmm_registers = 16; + linux_is_elf64 = is_elf64; x86_linux_update_xmltarget (); return; } + + linux_is_elf64 = 0; #endif /* Ok we have a 32-bit inferior. */ -- 2.30.2