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linux-user: Add preprocessor availability control to some syscalls 

Add ability to target platforms to individually include user-mode
support for system calls from "stat" group of system calls.

This change is related to new nanoMIPS platform in the sense that
it supports a different set of "stat" system calls than any other
target. nanoMIPS does not support structures stat and stat64 at
all. Also, support for certain number of other system calls is
dropped in nanoMIPS (those are most of the time obsoleted system
calls).

Without this patch, build for nanoMIPS would fail.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
This commit is contained in:
Aleksandar Rikalo 2018-08-02 16:16:00 +02:00 committed by Aleksandar Markovic
parent 977324ac8c
commit 4f7f892420
2 changed files with 42 additions and 1 deletions
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14
linux-user/strace.c
View File

@ -2304,7 +2304,19 @@ print_statfs(const struct syscallname *name,
print_pointer(arg1, 1);
print_syscall_epilogue(name);
}
#define print_statfs64 print_statfs
#endif
#ifdef TARGET_NR_statfs64
static void
print_statfs64(const struct syscallname *name,
abi_long arg0, abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4, abi_long arg5)
{
print_syscall_prologue(name);
print_string(arg0, 0);
print_pointer(arg1, 1);
print_syscall_epilogue(name);
}
#endif
#ifdef TARGET_NR_symlink

29
linux-user/syscall.c
View File

@ -7286,6 +7286,9 @@ static inline int target_to_host_mlockall_arg(int arg)
}
#endif
#if (defined(TARGET_NR_stat64) || defined(TARGET_NR_lstat64) || \
defined(TARGET_NR_fstat64) || defined(TARGET_NR_fstatat64) || \
defined(TARGET_NR_newfstatat))
static inline abi_long host_to_target_stat64(void *cpu_env,
abi_ulong target_addr,
struct stat *host_st)
@ -7348,6 +7351,7 @@ static inline abi_long host_to_target_stat64(void *cpu_env,
return 0;
}
#endif
/* ??? Using host futex calls even when target atomic operations
are not really atomic probably breaks things. However implementing
@ -7996,8 +8000,15 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
{
CPUState *cpu = ENV_GET_CPU(cpu_env);
abi_long ret;
#if defined(TARGET_NR_stat) || defined(TARGET_NR_stat64) \
|| defined(TARGET_NR_lstat) || defined(TARGET_NR_lstat64) \
|| defined(TARGET_NR_fstat) || defined(TARGET_NR_fstat64)
struct stat st;
#endif
#if defined(TARGET_NR_statfs) || defined(TARGET_NR_statfs64) \
|| defined(TARGET_NR_fstatfs)
struct statfs stfs;
#endif
void *p;
#if defined(DEBUG_ERESTARTSYS)
@ -8365,9 +8376,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_oldstat:
goto unimplemented;
#endif
#ifdef TARGET_NR_lseek
case TARGET_NR_lseek:
ret = get_errno(lseek(arg1, arg2, arg3));
break;
#endif
#if defined(TARGET_NR_getxpid) && defined(TARGET_ALPHA)
/* Alpha specific */
case TARGET_NR_getxpid:
@ -9251,6 +9264,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = get_errno(sethostname(p, arg2));
unlock_user(p, arg1, 0);
break;
#ifdef TARGET_NR_setrlimit
case TARGET_NR_setrlimit:
{
int resource = target_to_host_resource(arg1);
@ -9264,6 +9278,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = get_errno(setrlimit(resource, &rlim));
}
break;
#endif
#ifdef TARGET_NR_getrlimit
case TARGET_NR_getrlimit:
{
int resource = target_to_host_resource(arg1);
@ -9280,6 +9296,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
}
break;
#endif
case TARGET_NR_getrusage:
{
struct rusage rusage;
@ -9644,15 +9661,19 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = get_errno(munlockall());
break;
#endif
#ifdef TARGET_NR_truncate
case TARGET_NR_truncate:
if (!(p = lock_user_string(arg1)))
goto efault;
ret = get_errno(truncate(p, arg2));
unlock_user(p, arg1, 0);
break;
#endif
#ifdef TARGET_NR_ftruncate
case TARGET_NR_ftruncate:
ret = get_errno(ftruncate(arg1, arg2));
break;
#endif
case TARGET_NR_fchmod:
ret = get_errno(fchmod(arg1, arg2));
break;
@ -9688,6 +9709,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_profil:
goto unimplemented;
#endif
#ifdef TARGET_NR_statfs
case TARGET_NR_statfs:
if (!(p = lock_user_string(arg1)))
goto efault;
@ -9719,9 +9741,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user_struct(target_stfs, arg2, 1);
}
break;
#endif
#ifdef TARGET_NR_fstatfs
case TARGET_NR_fstatfs:
ret = get_errno(fstatfs(arg1, &stfs));
goto convert_statfs;
#endif
#ifdef TARGET_NR_statfs64
case TARGET_NR_statfs64:
if (!(p = lock_user_string(arg1)))
@ -9969,6 +9994,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user(p, arg1, 0);
goto do_stat;
#endif
#ifdef TARGET_NR_fstat
case TARGET_NR_fstat:
{
ret = get_errno(fstat(arg1, &st));
@ -9998,6 +10024,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
}
break;
#endif
#ifdef TARGET_NR_olduname
case TARGET_NR_olduname:
goto unimplemented;
@ -10997,6 +11024,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#ifdef CONFIG_SENDFILE
#ifdef TARGET_NR_sendfile
case TARGET_NR_sendfile:
{
off_t *offp = NULL;
@ -11017,6 +11045,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
break;
}
#endif
#ifdef TARGET_NR_sendfile64
case TARGET_NR_sendfile64:
{