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chore: clarified syscall backing functions

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Sean McBride 4 years ago
parent 81a4d65a2e
commit 106db3d348
1 changed files with 46 additions and 91 deletions
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97
runtime/src/libc/syscall.c
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@ -101,7 +101,6 @@ wasm_read(int32_t filedes, int32_t buf_offset, int32_t nbyte)
return bytes_to_read;
}
char *buf = worker_thread_get_memory_ptr_void(buf_offset, nbyte);
int32_t res = 0;
@ -277,24 +276,6 @@ struct wasm_stat {
};
#define SYS_STAT 4
// What the OSX stat structure looks like:
// struct stat { /* when _DARWIN_FEATURE_64_BIT_INODE is NOT defined */
// dev_t st_dev; /* device inode resides on */
// ino_t st_ino; /* inode's number */
// mode_t st_mode; /* inode protection mode */
// nlink_t st_nlink; /* number of hard links to the file */
// uid_t st_uid; /* user-id of owner */
// gid_t st_gid; /* group-id of owner */
// dev_t st_rdev; /* device type, for special file inode */
// struct timespec st_atimespec; /* time of last access */
// struct timespec st_mtimespec; /* time of last data modification */
// struct timespec st_ctimespec; /* time of last file status change */
// off_t st_size; /* file size, in bytes */
// quad_t st_blocks; /* blocks allocated for file */
// u_long st_blksize;/* optimal file sys I/O ops blocksize */
// u_long st_flags; /* user defined flags for file */
// u_long st_gen; /* file generation number */
// };
int32_t
wasm_stat(uint32_t path_str_offset, int32_t stat_offset)
@ -318,16 +299,7 @@ wasm_stat(uint32_t path_str_offset, int32_t stat_offset)
.st_blksize = stat.st_blksize,
.st_blocks = stat.st_blocks,
};
#ifdef __APPLE__
stat_ptr->st_atim.tv_sec = stat.st_atimespec.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atimespec.tv_nsec;
stat_ptr->st_mtim.tv_sec = stat.st_mtimespec.tv_sec;
stat_ptr->st_mtim.tv_nsec = stat.st_mtimespec.tv_nsec;
stat_ptr->st_ctim.tv_sec = stat.st_ctimespec.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctimespec.tv_nsec;
#else
stat_ptr->st_atim.tv_sec = stat.st_atim.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atim.tv_nsec;
@ -336,7 +308,6 @@ wasm_stat(uint32_t path_str_offset, int32_t stat_offset)
stat_ptr->st_ctim.tv_sec = stat.st_ctim.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctim.tv_nsec;
#endif
return res;
}
@ -363,17 +334,7 @@ wasm_fstat(int32_t filedes, int32_t stat_offset)
.st_blksize = stat.st_blksize,
.st_blocks = stat.st_blocks,
};
#ifdef __APPLE__
panic("We only support Linux!");
stat_ptr->st_atim.tv_sec = stat.st_atimespec.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atimespec.tv_nsec;
stat_ptr->st_mtim.tv_sec = stat.st_mtimespec.tv_sec;
stat_ptr->st_mtim.tv_nsec = stat.st_mtimespec.tv_nsec;
stat_ptr->st_ctim.tv_sec = stat.st_ctimespec.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctimespec.tv_nsec;
#else
stat_ptr->st_atim.tv_sec = stat.st_atim.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atim.tv_nsec;
@ -382,7 +343,6 @@ wasm_fstat(int32_t filedes, int32_t stat_offset)
stat_ptr->st_ctim.tv_sec = stat.st_ctim.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctim.tv_nsec;
#endif
return res;
}
@ -410,16 +370,7 @@ wasm_lstat(int32_t path_str_offset, int32_t stat_offset)
.st_blksize = stat.st_blksize,
.st_blocks = stat.st_blocks,
};
#ifdef __APPLE__
stat_ptr->st_atim.tv_sec = stat.st_atimespec.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atimespec.tv_nsec;
stat_ptr->st_mtim.tv_sec = stat.st_mtimespec.tv_sec;
stat_ptr->st_mtim.tv_nsec = stat.st_mtimespec.tv_nsec;
stat_ptr->st_ctim.tv_sec = stat.st_ctimespec.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctimespec.tv_nsec;
#else
stat_ptr->st_atim.tv_sec = stat.st_atim.tv_sec;
stat_ptr->st_atim.tv_nsec = stat.st_atim.tv_nsec;
@ -428,7 +379,6 @@ wasm_lstat(int32_t path_str_offset, int32_t stat_offset)
stat_ptr->st_ctim.tv_sec = stat.st_ctim.tv_sec;
stat_ptr->st_ctim.tv_nsec = stat.st_ctim.tv_nsec;
#endif
return res;
}
@ -527,7 +477,7 @@ wasm_writev(int32_t fd, int32_t iov_offset, int32_t iovcnt)
struct wasm_iovec *iov = worker_thread_get_memory_ptr_void(iov_offset, iovcnt * sizeof(struct wasm_iovec));
// If we aren't on MUSL, pass writev to printf if possible
#if defined(__APPLE__) || defined(__GLIBC__)
#if defined(__GLIBC__)
if (fd == 1) {
int sum = 0;
for (int i = 0; i < iovcnt; i++) {
@ -759,6 +709,31 @@ inner_syscall_handler(int32_t n, int32_t a, int32_t b, int32_t c, int32_t d, int
return wasm_read(a, b, c);
case SYS_WRITE:
return wasm_write(a, b, c);
case SYS_WRITEV:
return wasm_writev(a, b, c);
case SYS_IOCTL:
case SYS_SET_THREAD_AREA:
case SYS_SET_TID_ADDRESS:
/* Note: These are called, but are unimplemented and fail silently */
return 0;
case SYS_MUNMAP:
case SYS_BRK:
case SYS_RT_SIGACTION:
case SYS_RT_SIGPROGMASK:
case SYS_MADVISE:
/* These calls are unimplemented but not believed to be used */
assert(0);
return 0;
default:
/* This is a general catch all for the other functions below */
debuglog("Unknown Syscall %d\n", n);
fflush(stderr);
assert(0);
/* The calls below this need to be validated / refactored to be non-blocking */
// case SYS_READV:
// return wasm_readv(a, b, c);
// case SYS_OPEN:
// return wasm_open(a, b, c);
// case SYS_CLOSE:
@ -773,22 +748,6 @@ inner_syscall_handler(int32_t n, int32_t a, int32_t b, int32_t c, int32_t d, int
// return wasm_lseek(a, b, c);
// case SYS_MMAP:
// return wasm_mmap(a, b, c, d, e, f);
case SYS_MUNMAP:
return 0;
case SYS_BRK:
return 0;
case SYS_RT_SIGACTION:
return 0;
case SYS_RT_SIGPROGMASK:
return 0;
case SYS_IOCTL:
return wasm_ioctl(a, b, c);
// case SYS_READV:
// return wasm_readv(a, b, c);
case SYS_WRITEV:
return wasm_writev(a, b, c);
case SYS_MADVISE:
return 0;
// case SYS_GETPID:
// return wasm_getpid();
// case SYS_FCNTL:
@ -801,10 +760,6 @@ inner_syscall_handler(int32_t n, int32_t a, int32_t b, int32_t c, int32_t d, int
// return wasm_getcwd(a, b);
// case SYS_GETEUID:
// return wasm_geteuid();
case SYS_SET_THREAD_AREA:
return 0;
case SYS_SET_TID_ADDRESS:
return 0;
// case SYS_GET_TIME:
// return wasm_get_time(a, b);
// case SYS_EXIT_GROUP:

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