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use kernel like macros for user access (will be useful someday to have a better error checking

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@634 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-02-22 13:40:13 +00:00
parent 121061dcdf
commit edf779ffcc
4 changed files with 142 additions and 112 deletions
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72
linux-user/signal.c
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@ -450,69 +450,6 @@ int do_sigaction(int sig, const struct target_sigaction *act,
return 0;
}
#define __put_user(x,ptr)\
({\
int size = sizeof(*ptr);\
switch(size) {\
case 1:\
stb(ptr, (typeof(*ptr))(x));\
break;\
case 2:\
stw(ptr, (typeof(*ptr))(x));\
break;\
case 4:\
stl(ptr, (typeof(*ptr))(x));\
break;\
case 8:\
stq(ptr, (typeof(*ptr))(x));\
break;\
default:\
abort();\
}\
0;\
})
#define __get_user(x, ptr) \
({\
int size = sizeof(*ptr);\
switch(size) {\
case 1:\
x = (typeof(*ptr))ldub(ptr);\
break;\
case 2:\
x = (typeof(*ptr))lduw(ptr);\
break;\
case 4:\
x = (typeof(*ptr))ldl(ptr);\
break;\
case 8:\
x = (typeof(*ptr))ldq(ptr);\
break;\
default:\
abort();\
}\
0;\
})
#define __copy_to_user(dst, src, size)\
({\
memcpy(dst, src, size);\
0;\
})
#define __copy_from_user(dst, src, size)\
({\
memcpy(dst, src, size);\
0;\
})
#define __clear_user(dst, size)\
({\
memset(dst, 0, size);\
0;\
})
#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
@ -707,10 +644,8 @@ static void setup_frame(int sig, struct emulated_sigaction *ka,
frame = get_sigframe(ka, env, sizeof(*frame));
#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
&& sig < 32
@ -773,10 +708,8 @@ static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
frame = get_sigframe(ka, env, sizeof(*frame));
#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
@ -1172,10 +1105,9 @@ static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
int err = 0;
#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return 1;
#endif
return /* 1 */;
__put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err);
__put_user_error(&frame->uc, (target_ulong *)&frame->puc, err);
err |= copy_siginfo_to_user(&frame->info, info);