diff options
Diffstat (limited to 'tools/include/nolibc')
| -rw-r--r-- | tools/include/nolibc/arch-sparc.h | 2 | ||||
| -rw-r--r-- | tools/include/nolibc/unistd.h | 58 |
2 files changed, 59 insertions, 1 deletions
diff --git a/tools/include/nolibc/arch-sparc.h b/tools/include/nolibc/arch-sparc.h index ddae9bc10dfe..23fab40accfa 100644 --- a/tools/include/nolibc/arch-sparc.h +++ b/tools/include/nolibc/arch-sparc.h @@ -45,7 +45,7 @@ \ __asm__ volatile ( \ _NOLIBC_SYSCALL \ - : "+r"(_arg1) \ + : "=r"(_arg1) \ : "r"(_num) \ : "memory", "cc" \ ); \ diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h index 79599ceef45d..a264a20da13d 100644 --- a/tools/include/nolibc/unistd.h +++ b/tools/include/nolibc/unistd.h @@ -73,6 +73,48 @@ int ftruncate(int fd, off_t length) return __sysret(_sys_ftruncate(fd, length)); } +/* + * char *getcwd(char *buf, size_t size); + */ + +static __attribute__((unused)) +int _sys_getcwd(char *buf, size_t size) +{ + return __nolibc_syscall2(__NR_getcwd, buf, size); +} + +static __attribute__((unused)) +char *getcwd(char *buf, size_t size) +{ + int ret; + + /* Unlike other libc's we don't handle passing NULL for buf */ + if (!buf || !size) { + SET_ERRNO(EINVAL); + return NULL; + } + + ret = __sysret(_sys_getcwd(buf, size)); + + /* On error return NULL, __sysret() above will have set errno */ + if (ret < 0) + return NULL; + + /* Handle no path being written or the kernel putting + * "(unreachable)" into the buffer instead of a path. + * This matches what musl is doing. + */ + if (ret == 0 || buf[0] != '/') { + SET_ERRNO(ENOENT); + return NULL; + } + + /* ret must be the number of bytes written at this point, + * so return the pointer to buf. + */ + return buf; +} + static __attribute__((unused)) int msleep(unsigned int msecs) { @@ -86,6 +128,22 @@ int msleep(unsigned int msecs) return 0; } +/* + * ssize_t readlink(const char *path, char *buf, size_t bufsiz); + */ + +static __attribute__((unused)) +ssize_t _sys_readlink(const char *path, char *buf, size_t bufsiz) +{ + return __nolibc_syscall4(__NR_readlinkat, AT_FDCWD, path, buf, bufsiz); +} + +static __attribute__((unused)) +ssize_t readlink(const char *path, char *buf, size_t bufsiz) +{ + return __sysret(_sys_readlink(path, buf, bufsiz)); +} + static __attribute__((unused)) unsigned int sleep(unsigned int seconds) { |