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sim: m32r: fixup some of the int<->pointer casts

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The m32r trap code was written for a 32-bit Linux host (and really, one
whose Linux ABI matched pretty exactly).  This has lead to conversions
between integers and pointers which breaks down hard on 64-bit hosts.

Clean up some of the functions where possible to avoid unnecessary
conversions, use uintptr_t to cast 32-bit target pointers to host
pointers in some places, and just stub out a few functions that can't
easily be salvaged currently when sizeof(void*) is not 32-bits.  This
is a bit ugly, but lets us enable warnings for the whole file.
This commit is contained in:
Mike Frysinger 2024-01-10 22:25:51 -05:00
parent dbd4aebe5b
commit 08a7937f3a
4 changed files with 94 additions and 31 deletions
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3
sim/config.h.in
View File

@ -489,6 +489,9 @@
/* The size of `long long', as computed by sizeof. */
#undef SIZEOF_LONG_LONG
/* The size of `void *', as computed by sizeof. */
#undef SIZEOF_VOID_P
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS

39
sim/configure vendored
View File

@ -8882,6 +8882,40 @@ _ACEOF
fi
# The cast to long int works around a bug in the HP C Compiler
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
# This bug is HP SR number 8606223364.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of void *" >&5
$as_echo_n "checking size of void *... " >&6; }
if ${ac_cv_sizeof_void_p+:} false; then :
$as_echo_n "(cached) " >&6
else
if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (void *))" "ac_cv_sizeof_void_p" "$ac_includes_default"; then :
else
if test "$ac_cv_type_void_p" = yes; then
{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error 77 "cannot compute sizeof (void *)
See \`config.log' for more details" "$LINENO" 5; }
else
ac_cv_sizeof_void_p=0
fi
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_void_p" >&5
$as_echo "$ac_cv_sizeof_void_p" >&6; }
cat >>confdefs.h <<_ACEOF
#define SIZEOF_VOID_P $ac_cv_sizeof_void_p
_ACEOF
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for struct statfs" >&5
$as_echo_n "checking for struct statfs... " >&6; }
if ${sim_cv_struct_statfs+:} false; then :
@ -12858,7 +12892,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 12861 "configure"
#line 12895 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -12964,7 +12998,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 12967 "configure"
#line 13001 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -13961,7 +13995,6 @@ fi
ac_fn_c_check_decl "$LINENO" "ffs" "ac_cv_have_decl_ffs" "$ac_includes_default"
if test "x$ac_cv_have_decl_ffs" = xyes; then :
ac_have_decl=1

81
sim/m32r/traps.c
View File

@ -436,7 +436,7 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_brk:
result = brk ((void *) arg1);
result = brk ((void *) (uintptr_t) arg1);
errcode = errno;
//result = arg1;
break;
@ -582,51 +582,51 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
{
int n;
fd_set readfds;
fd_set *treadfdsp;
unsigned int treadfdsp;
fd_set *hreadfdsp;
fd_set writefds;
fd_set *twritefdsp;
unsigned int twritefdsp;
fd_set *hwritefdsp;
fd_set exceptfds;
fd_set *texceptfdsp;
unsigned int texceptfdsp;
fd_set *hexceptfdsp;
struct timeval *ttimeoutp;
unsigned int ttimeoutp;
struct timeval timeout;
n = arg1;
treadfdsp = (fd_set *) arg2;
if (treadfdsp != NULL)
treadfdsp = arg2;
if (treadfdsp !=0)
{
readfds = *((fd_set *) t2h_addr (cb, &s, (unsigned int) treadfdsp));
readfds = *((fd_set *) t2h_addr (cb, &s, treadfdsp));
translate_endian_t2h (&readfds, sizeof(readfds));
hreadfdsp = &readfds;
}
else
hreadfdsp = NULL;
twritefdsp = (fd_set *) arg3;
if (twritefdsp != NULL)
twritefdsp = arg3;
if (twritefdsp != 0)
{
writefds = *((fd_set *) t2h_addr (cb, &s, (unsigned int) twritefdsp));
writefds = *((fd_set *) t2h_addr (cb, &s, twritefdsp));
translate_endian_t2h (&writefds, sizeof(writefds));
hwritefdsp = &writefds;
}
else
hwritefdsp = NULL;
texceptfdsp = (fd_set *) arg4;
if (texceptfdsp != NULL)
texceptfdsp = arg4;
if (texceptfdsp != 0)
{
exceptfds = *((fd_set *) t2h_addr (cb, &s, (unsigned int) texceptfdsp));
exceptfds = *((fd_set *) t2h_addr (cb, &s, texceptfdsp));
translate_endian_t2h (&exceptfds, sizeof(exceptfds));
hexceptfdsp = &exceptfds;
}
else
hexceptfdsp = NULL;
ttimeoutp = (struct timeval *) arg5;
timeout = *((struct timeval *) t2h_addr (cb, &s, (unsigned int) ttimeoutp));
ttimeoutp = arg5;
timeout = *((struct timeval *) t2h_addr (cb, &s, ttimeoutp));
translate_endian_t2h (&timeout, sizeof(timeout));
result = select (n, hreadfdsp, hwritefdsp, hexceptfdsp, &timeout);
@ -635,10 +635,10 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
if (result != 0)
break;
if (treadfdsp != NULL)
if (treadfdsp != 0)
{
translate_endian_h2t (&readfds, sizeof(readfds));
if ((s.write_mem) (cb, &s, (unsigned long) treadfdsp,
if ((s.write_mem) (cb, &s, treadfdsp,
(char *) &readfds, sizeof(readfds)) != sizeof(readfds))
{
result = -1;
@ -646,10 +646,10 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
}
}
if (twritefdsp != NULL)
if (twritefdsp != 0)
{
translate_endian_h2t (&writefds, sizeof(writefds));
if ((s.write_mem) (cb, &s, (unsigned long) twritefdsp,
if ((s.write_mem) (cb, &s, twritefdsp,
(char *) &writefds, sizeof(writefds)) != sizeof(writefds))
{
result = -1;
@ -657,10 +657,10 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
}
}
if (texceptfdsp != NULL)
if (texceptfdsp != 0)
{
translate_endian_h2t (&exceptfds, sizeof(exceptfds));
if ((s.write_mem) (cb, &s, (unsigned long) texceptfdsp,
if ((s.write_mem) (cb, &s, texceptfdsp,
(char *) &exceptfds, sizeof(exceptfds)) != sizeof(exceptfds))
{
result = -1;
@ -669,7 +669,7 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
}
translate_endian_h2t (&timeout, sizeof(timeout));
if ((s.write_mem) (cb, &s, (unsigned long) ttimeoutp,
if ((s.write_mem) (cb, &s, ttimeoutp,
(char *) &timeout, sizeof(timeout)) != sizeof(timeout))
{
result = -1;
@ -692,8 +692,13 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_readdir:
#if SIZEOF_VOID_P == 4
result = (int) readdir ((DIR *) t2h_addr (cb, &s, arg1));
errcode = errno;
#else
result = 0;
errcode = ENOSYS;
#endif
break;
#if 0
@ -714,6 +719,7 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
#endif
case TARGET_LINUX_SYS_mmap2:
{
#if SIZEOF_VOID_P == 4 /* Code assumes m32r pointer size matches host. */
void *addr;
size_t len;
int prot, flags, fildes;
@ -736,11 +742,16 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
0, access_read_write_exec, 0,
result, len, 0, NULL, NULL);
}
#else
result = 0;
errcode = ENOSYS;
#endif
}
break;
case TARGET_LINUX_SYS_mmap:
{
#if SIZEOF_VOID_P == 4 /* Code assumes m32r pointer size matches host. */
void *addr;
size_t len;
int prot, flags, fildes;
@ -773,11 +784,15 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
0, access_read_write_exec, 0,
result, len, 0, NULL, NULL);
}
#else
result = 0;
errcode = ENOSYS;
#endif
}
break;
case TARGET_LINUX_SYS_munmap:
result = munmap ((void *)arg1, arg2);
result = munmap ((void *) (uintptr_t) arg1, arg2);
errcode = errno;
if (result != -1)
sim_core_detach (sd, NULL, 0, arg2, result);
@ -1078,7 +1093,7 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_mprotect:
result = mprotect ((void *) arg1, arg2, arg3);
result = mprotect ((void *) (uintptr_t) arg1, arg2, arg3);
errcode = errno;
break;
@ -1149,7 +1164,7 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_msync:
result = msync ((void *) arg1, arg2, arg3);
result = msync ((void *) (uintptr_t) arg1, arg2, arg3);
errcode = errno;
break;
@ -1216,8 +1231,13 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_mremap: /* FIXME */
#if SIZEOF_VOID_P == 4 /* Code assumes m32r pointer size matches host. */
result = (int) mremap ((void *) t2h_addr (cb, &s, arg1), arg2, arg3, arg4);
errcode = errno;
#else
result = -1;
errcode = ENOSYS;
#endif
break;
case TARGET_LINUX_SYS_getresuid32:
@ -1285,8 +1305,13 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
break;
case TARGET_LINUX_SYS_getcwd:
result = (int) getcwd ((char *) t2h_addr (cb, &s, arg1), arg2);
errcode = errno;
{
void *ret;
ret = getcwd ((char *) t2h_addr (cb, &s, arg1), arg2);
result = ret == NULL ? 0 : arg1;
errcode = errno;
}
break;
case TARGET_LINUX_SYS_sendfile:

2
sim/m4/sim_ac_platform.m4
View File

@ -133,6 +133,8 @@ AC_CHECK_TYPES(socklen_t, [], [],
#include <sys/socket.h>
])
AC_CHECK_SIZEOF([void *])
dnl Check for struct statfs.
AC_CACHE_CHECK([for struct statfs],
[sim_cv_struct_statfs],