The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=a4ed0eb1aa64d10feaf1e64de39eb07be43a5204
commit a4ed0eb1aa64d10feaf1e64de39eb07be43a5204 Author: Warner Losh <[email protected]> AuthorDate: 2022-06-30 18:22:33 +0000 Commit: Warner Losh <[email protected]> CommitDate: 2022-07-15 18:00:50 +0000 kboot: Implement symlink(2) Linux's /dev/fd is implemented inside of /proc/self/fd, so we may need to create a symlink to it early in boot. "/dev/fd" and "/dev/std*" might not be strictly required for the boot loader, but should be present for maximum flexibility. Sponsored by: Netflix --- stand/kboot/arch/amd64/syscall_nr.h | 1 + stand/kboot/arch/powerpc64/syscall_nr.h | 1 + stand/kboot/host_syscall.h | 3 +++ stand/kboot/host_syscalls.c | 6 ++++++ 4 files changed, 11 insertions(+) diff --git a/stand/kboot/arch/amd64/syscall_nr.h b/stand/kboot/arch/amd64/syscall_nr.h index 47bb84cc3a36..756b3e93af9a 100644 --- a/stand/kboot/arch/amd64/syscall_nr.h +++ b/stand/kboot/arch/amd64/syscall_nr.h @@ -12,6 +12,7 @@ #define SYS_pselect6 270 #define SYS_read 0 #define SYS_reboot 169 +#define SYS_symlinkat 266 #define SYS_uname 63 #define SYS_write 1 diff --git a/stand/kboot/arch/powerpc64/syscall_nr.h b/stand/kboot/arch/powerpc64/syscall_nr.h index 2b0599b47435..13f26d80f6a3 100644 --- a/stand/kboot/arch/powerpc64/syscall_nr.h +++ b/stand/kboot/arch/powerpc64/syscall_nr.h @@ -13,6 +13,7 @@ #define SYS_pselect6 280 #define SYS_read 3 #define SYS_reboot 88 +#define SYS_symlinkat 295 #define SYS_uname 120 #define SYS_write 4 diff --git a/stand/kboot/host_syscall.h b/stand/kboot/host_syscall.h index 4a3ff3ea818e..3b02f2e78304 100644 --- a/stand/kboot/host_syscall.h +++ b/stand/kboot/host_syscall.h @@ -68,6 +68,8 @@ typedef int64_t host_blkcnt_t; #define HOST_O_APPEND 02000 #define HOST_O_NONBLOCK 04000 +#define HOST_AT_FDCWD -100 /* Relative to current directory */ + /* * Data types */ @@ -104,6 +106,7 @@ int host_reboot(int, int, int, uintptr_t); int host_select(int nfds, long *readfds, long *writefds, long *exceptfds, struct host_timeval *timeout); int host_stat(const char *path, struct host_kstat *sb); +int host_symlink(const char *path1, const char *path2); int host_uname(struct old_utsname *); ssize_t host_write(int fd, const void *buf, size_t nbyte); diff --git a/stand/kboot/host_syscalls.c b/stand/kboot/host_syscalls.c index a83bc3bbfe0d..a69937a5a0e1 100644 --- a/stand/kboot/host_syscalls.c +++ b/stand/kboot/host_syscalls.c @@ -110,6 +110,12 @@ host_stat(const char *path, struct host_kstat *sb) return host_syscall(SYS_newfstatat, HOST_AT_FDCWD, (uintptr_t)path, (uintptr_t)sb, 0); } +int +host_symlink(const char *path1, const char *path2) +{ + return host_syscall(SYS_symlinkat, HOST_AT_FDCWD, path1, path2); +} + int host_uname(struct old_utsname *uts) {
