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implemented VOSF on Linux/ppc

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cebix 2001-02-10 15:29:01 +00:00
parent a76e2d5da4
commit 4b2c1d9a23
2 changed files with 44 additions and 0 deletions
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36
BasiliskII/src/Unix/configure.in
View File

@ -48,10 +48,12 @@ dnl Target CPU type.
HAVE_I386=no
HAVE_M68K=no
HAVE_SPARC=no
HAVE_POWERPC=no
case "$target_cpu" in
i386* | i486* | i586* | i686* | i786* ) CPU_TYPE=i386 HAVE_I386=yes;;
m68k* ) CPU_TYPE=m68k HAVE_M68K=yes;;
sparc* ) CPU_TYPE=sparc HAVE_SPARC=yes;;
powerpc* ) CPU_TYPE=powerpc HAVE_POWERPC=yes;;
*) CPU_TYPE=`echo $target_cpu | sed -e 's/-/_/'`;;
esac
DEFINES="$DEFINES -DCPU_$CPU_TYPE"
@ -395,6 +397,40 @@ if [[ "x$ac_cv_have_extended_signals" = "xno" ]]; then
AC_LANG_RESTORE
])
AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
elif [[ "x$HAVE_POWERPC" = "xyes" ]]; then
AC_CACHE_CHECK("whether we then have a subterfuge for your system",
ac_cv_have_sigcontext_hack, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_RUN([
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/mman.h>
static volatile caddr_t mem = 0;
static int zero_fd = -1;
static RETSIGTYPE segfault_handler(int, struct sigcontext_struct *scs)
{ if ((caddr_t)(scs->regs->dar) != mem) exit(1);
munmap(mem, getpagesize()); close(zero_fd); exit(0); }
int main()
{ if ((zero_fd = open("/dev/zero", O_RDWR)) < 0) exit(1);
if ((mem = (caddr_t)mmap(0, getpagesize(), PROT_READ, MAP_PRIVATE, zero_fd, 0)) == (caddr_t)MAP_FAILED) exit(1);
struct sigaction sa; sa.sa_flags = 0;
sa.sa_handler = (RETSIGTYPE (*)(int))segfault_handler;
sigaction(SIGSEGV, &sa, 0);
mem[0] = 0;
exit(1); // should not be reached
}
],
[ac_cv_have_sigcontext_hack=yes],
[ac_cv_have_sigcontext_hack=no]
)
AC_LANG_RESTORE
])
AC_TRANSLATE_DEFINE(HAVE_SIGCONTEXT_SUBTERFUGE, $ac_cv_have_sigcontext_hack)
fi
;;
netbsd*)

8
BasiliskII/src/Unix/video_vosf.h
View File

@ -117,6 +117,14 @@ static void Screen_fault_handler(int, int code, struct sigcontext *scp)
do_handle_screen_fault(fault_addr);
}
# elif defined(__powerpc__) && defined(__linux__)
static void Screen_fault_handler(int, struct sigcontext_struct *scs)
{
D(bug("Screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", scs->regs->dar, scs->regs->nip));
do_handle_screen_fault((uintptr)scs->regs->dar, (uintptr)scs->regs->nip);
}
# else
# error "No suitable subterfuge for Video on SEGV signals"
# endif