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linux-user: implemented ELF coredump support for ARM target

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When target process is killed with signal (such signal that
should dump core) a coredump file is created.  This file is
similar than coredump generated by Linux (there are few exceptions
though).

Riku Voipio: added support for rlimit

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
This commit is contained in:
Mika Westerberg 2009-04-07 09:57:11 +03:00 • committed by Riku Voipio
parent 88a8c98455
commit edf8e2af14
9 changed files with 1101 additions and 68 deletions
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40
linux-user/signal.c
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@ -27,6 +27,7 @@
#include <errno.h>
#include <assert.h>
#include <sys/ucontext.h>
#include <sys/resource.h>
#include "qemu.h"
#include "qemu-common.h"
@ -287,6 +288,23 @@ static int fatal_signal (int sig)
}
}
/* returns 1 if given signal should dump core if not handled */
static int core_dump_signal(int sig)
{
switch (sig) {
case TARGET_SIGABRT:
case TARGET_SIGFPE:
case TARGET_SIGILL:
case TARGET_SIGQUIT:
case TARGET_SIGSEGV:
case TARGET_SIGTRAP:
case TARGET_SIGBUS:
return (1);
default:
return (0);
}
}
void signal_init(void)
{
struct sigaction act;
@ -352,13 +370,29 @@ static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
/* abort execution with signal */
static void QEMU_NORETURN force_sig(int sig)
{
int host_sig;
TaskState *ts = (TaskState *)thread_env->opaque;
int host_sig, core_dumped = 0;
struct sigaction act;
host_sig = target_to_host_signal(sig);
fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
sig, strsignal(host_sig));
gdb_signalled(thread_env, sig);
/* dump core if supported by target binary format */
if (core_dump_signal(sig) && (ts->bprm->core_dump != NULL)) {
stop_all_tasks();
core_dumped =
((*ts->bprm->core_dump)(sig, thread_env) == 0);
}
if (core_dumped) {
/* we already dumped the core of target process, we don't want
* a coredump of qemu itself */
struct rlimit nodump;
getrlimit(RLIMIT_CORE, &nodump);
nodump.rlim_cur=0;
setrlimit(RLIMIT_CORE, &nodump);
(void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
sig, strsignal(host_sig), "core dumped" );
}
/* The proper exit code for dieing from an uncaught signal is
* -<signal>. The kernel doesn't allow exit() or _exit() to pass
* a negative value. To get the proper exit code we need to