diff options
Diffstat (limited to 'code/fe310/gloss')
31 files changed, 0 insertions, 565 deletions
diff --git a/code/fe310/gloss/Makefile b/code/fe310/gloss/Makefile deleted file mode 100644 index a937a53..0000000 --- a/code/fe310/gloss/Makefile +++ /dev/null @@ -1,17 +0,0 @@ -include ../common.mk -CFLAGS += -I../include - -src = sys_access.c sys_chdir.c sys_chmod.c sys_chown.c sys_close.c sys_execve.c sys_exit.c sys_faccessat.c sys_fork.c sys_fstat.c sys_fstatat.c sys_ftime.c sys_getcwd.c sys_getpid.c \ - sys_isatty.c sys_kill.c sys_link.c sys_lseek.c sys_lstat.c sys_open.c sys_openat.c sys_read.c sys_sbrk.c sys_stat.c sys_sysconf.c sys_unlink.c sys_utime.c sys_wait.c sys_write.c -obj = crt0.o $(src:.c=.o) - -%.o: %.c - $(CC) $(CFLAGS) -c $< - -%.o: %.S - $(CC) $(CFLAGS) -c $< - -all: $(obj) - -clean: - rm -f *.o diff --git a/code/fe310/gloss/crt0.S b/code/fe310/gloss/crt0.S deleted file mode 100644 index 920ee4b..0000000 --- a/code/fe310/gloss/crt0.S +++ /dev/null @@ -1,246 +0,0 @@ -/* Copyright (c) 2017-2018 SiFive Inc. All rights reserved. - - This copyrighted material is made available to anyone wishing to use, - modify, copy, or redistribute it subject to the terms and conditions - of the FreeBSD License. This program is distributed in the hope that - it will be useful, but WITHOUT ANY WARRANTY expressed or implied, - including the implied warranties of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. A copy of this license is available at - http://www.opensource.org/licenses. -*/ - -/* crt0.S: Entry point for RISC-V METAL programs. */ - -.section .text.libgloss.start -.global _start -.type _start, @function - - /* _start is defined by the METAL to have been called with the following - * arguments: - * a0: the hart ID of the currently executing hart. Harts can start at - * any arbitrary point, it's the C library's job to ensure the code is - * safe. - * a1: a pointer to a description of the machine on which this code is - * currently executing. This is probably 0 on an embedded system - * because they tend to not be dynamically portable. As such, newlib - * ignores this argument. - * a2: a pointer to a function that must be run after the envirnoment has - * been initialized, but before user code can be expected to be run. - * If this is 0 then there is no function to be run. */ -_start: -.cfi_startproc -.cfi_undefined ra - - /* This is a bit funky: it's not usually sane for _start to return, but in - * this case we actually want to in order to signal an error to the METAL. */ - mv s0, ra - - /* Before doing anything we must initialize the global pointer, as we cannot - * safely perform any access that may be relaxed without GP being set. This - * is done with relaxation disabled to avoid relaxing the address calculation - * to just "addi gp, gp, 0". */ -.option push -.option norelax - la gp, __global_pointer$ -.option pop - - /* The METAL is designed for a bare-metal environment and therefor is expected - * to define its own stack pointer. We also align the stack pointer here - * because the only RISC-V ABI that's currently defined mandates 16-byte - * stack alignment. */ - la sp, _sp - - /* Increment by hartid number of stack sizes */ - li t0, 0 - la t1, __stack_size -1: - beq t0, a0, 1f - add sp, sp, t1 - addi t0, t0, 1 - j 1b -1: - andi sp, sp, -16 - - /* If we're not hart 0, skip the initialization work */ - la t0, __metal_boot_hart - bne a0, t0, _skip_init - - /* Embedded systems frequently require relocating the data segment before C - * code can be run -- for example, the data segment may exist in flash upon - * boot and then need to get relocated into a non-persistant writable memory - * before C code can execute. If this is the case we do so here. This step - * is optional: if the METAL provides an environment in which this relocation - * is not necessary then it must simply set metal_segment_data_source_start to - * be equal to metal_segment_data_target_start. */ - la t0, metal_segment_data_source_start - la t1, metal_segment_data_target_start - la t2, metal_segment_data_target_end - - beq t0, t1, 2f - bge t1, t2, 2f - -1: -#if __riscv_xlen == 32 - lw a0, 0(t0) - addi t0, t0, 4 - sw a0, 0(t1) - addi t1, t1, 4 - blt t1, t2, 1b -#else - ld a0, 0(t0) - addi t0, t0, 8 - sd a0, 0(t1) - addi t1, t1, 8 - blt t1, t2, 1b -#endif -2: - - /* Copy the ITIM section */ - la t0, metal_segment_itim_source_start - la t1, metal_segment_itim_target_start - la t2, metal_segment_itim_target_end - - beq t0, t1, 2f - bge t1, t2, 2f - -1: -#if __riscv_xlen == 32 - lw a0, 0(t0) - addi t0, t0, 4 - sw a0, 0(t1) - addi t1, t1, 4 - blt t1, t2, 1b -#else - ld a0, 0(t0) - addi t0, t0, 8 - sd a0, 0(t1) - addi t1, t1, 8 - blt t1, t2, 1b -#endif -2: - - /* Fence all subsequent instruction fetches until after the ITIM writes - complete */ - fence.i - - /* Zero the BSS segment. */ - la t1, metal_segment_bss_target_start - la t2, metal_segment_bss_target_end - - bge t1, t2, 2f - -1: -#if __riscv_xlen == 32 - sw x0, 0(t1) - addi t1, t1, 4 - blt t1, t2, 1b -#else - sd x0, 0(t1) - addi t1, t1, 8 - blt t1, t2, 1b -#endif -2: - - /* At this point we're in an environment that can execute C code. The first - * thing to do is to make the callback to the parent environment if it's been - * requested to do so. */ - beqz a2, 1f - jalr a2 -1: - - /* The RISC-V port only uses new-style constructors and destructors. */ - la a0, __libc_fini_array - call atexit - call __libc_init_array - -_skip_init: - - /* Synchronize harts so that secondary harts wait until hart 0 finishes - initializing */ - call __metal_synchronize_harts - - /* Check RISC-V isa and enable FS bits if Floating Point architecture. */ - csrr a5, misa - li a4, 0x10028 - and a5, a5, a4 - beqz a5, 1f - csrr a5, mstatus - lui a4, 0x2 - or a5, a5, a4 - csrw mstatus, a5 - csrwi fcsr, 0 -1: - - /* This is a C runtime, so main() is defined to have some arguments. Since - * there's nothing sane the METAL can pass we don't bother with that but - * instead just setup as close to a NOP as we can. */ - li a0, 1 /* argc=1 */ - la a1, argv /* argv = {"libgloss", NULL} */ - la a2, envp /* envp = {NULL} */ - call secondary_main - - /* Call exit to handle libc's cleanup routines. Under normal contains this - * shouldn't even get called, but I'm still not using a tail call here - * because returning to the METAL is the right thing to do in pathological - * situations. */ - call exit - - /* And here's where we return. Again, it's a bit odd but the METAL defines - * this as a bad idea (ie, as opposed to leaving it undefined) and at this - * point it's really the only thing left to do. */ - mv ra, s0 - ret - -.cfi_endproc - -/* RISC-V systems always use __libc_{init,fini}_array, but for compatibility we - * define _{init,fini} to do nothing. */ -.global _init -.type _init, @function -.global _fini -.type _fini, @function -_init: -_fini: - ret -.size _init, .-_init -.size _fini, .-_fini - -/* By default, secondary_main will cause secondary harts to spin forever. - * Users can redefine secondary_main themselves to run code on secondary harts */ -.weak secondary_main -.global secondary_main -.type secondary_main, @function - -secondary_main: - addi sp, sp, -16 -#if __riscv_xlen == 32 - sw ra, 4(sp) -#else - sd ra, 8(sp) -#endif - csrr t0, mhartid - la t1, __metal_boot_hart - beq t0, t1, 2f -1: - wfi - j 1b -2: - call main -#if __riscv_xlen == 32 - lw ra, 4(sp) -#else - ld ra, 8(sp) -#endif - addi sp, sp, 16 - ret - -/* This shim allows main() to be passed a set of arguments that can satisfy the - * requirements of the C API. */ -.section .rodata.libgloss.start -argv: -.dc.a name -envp: -.dc.a 0 -name: -.asciz "libgloss" - diff --git a/code/fe310/gloss/sys_access.c b/code/fe310/gloss/sys_access.c deleted file mode 100644 index c0bc153..0000000 --- a/code/fe310/gloss/sys_access.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_access(const char *file, int mode) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_chdir.c b/code/fe310/gloss/sys_chdir.c deleted file mode 100644 index f33d26a..0000000 --- a/code/fe310/gloss/sys_chdir.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_chdir(const char *path) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_chmod.c b/code/fe310/gloss/sys_chmod.c deleted file mode 100644 index 67412bf..0000000 --- a/code/fe310/gloss/sys_chmod.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -#include <sys/types.h> - -int -_chmod(const char *path, mode_t mode) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_chown.c b/code/fe310/gloss/sys_chown.c deleted file mode 100644 index 302952e..0000000 --- a/code/fe310/gloss/sys_chown.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <sys/types.h> -#include <errno.h> - -int -_chown(const char *path, uid_t owner, gid_t group) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_close.c b/code/fe310/gloss/sys_close.c deleted file mode 100644 index 26dd6a5..0000000 --- a/code/fe310/gloss/sys_close.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_close(int file) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_execve.c b/code/fe310/gloss/sys_execve.c deleted file mode 100644 index 9ae9f7e..0000000 --- a/code/fe310/gloss/sys_execve.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_execve(const char *name, char *const argv[], char *const env[]) -{ - errno = ENOMEM; - return -1; -} diff --git a/code/fe310/gloss/sys_exit.c b/code/fe310/gloss/sys_exit.c deleted file mode 100644 index 1502b3e..0000000 --- a/code/fe310/gloss/sys_exit.c +++ /dev/null @@ -1,7 +0,0 @@ -#include <stdlib.h> - -__attribute__ ((noreturn)) void -_exit(int st) { while (1); } - -int -atexit(void (*f)(void)) { return 0; } diff --git a/code/fe310/gloss/sys_faccessat.c b/code/fe310/gloss/sys_faccessat.c deleted file mode 100644 index 873d52c..0000000 --- a/code/fe310/gloss/sys_faccessat.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_faccessat(int dirfd, const char *file, int mode, int flags) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_fork.c b/code/fe310/gloss/sys_fork.c deleted file mode 100644 index 64e6756..0000000 --- a/code/fe310/gloss/sys_fork.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_fork() -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_fstat.c b/code/fe310/gloss/sys_fstat.c deleted file mode 100644 index fedc289..0000000 --- a/code/fe310/gloss/sys_fstat.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -#include <sys/stat.h> - -int -_fstat(int file, struct stat *st) -{ - errno = -ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_fstatat.c b/code/fe310/gloss/sys_fstatat.c deleted file mode 100644 index f2f43bd..0000000 --- a/code/fe310/gloss/sys_fstatat.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -#include <sys/stat.h> - -int -_fstatat(int dirfd, const char *file, struct stat *st, int flags) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_ftime.c b/code/fe310/gloss/sys_ftime.c deleted file mode 100644 index 65c1563..0000000 --- a/code/fe310/gloss/sys_ftime.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -#include <sys/timeb.h> - -int -_ftime(struct timeb *tp) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_getcwd.c b/code/fe310/gloss/sys_getcwd.c deleted file mode 100644 index 82e8404..0000000 --- a/code/fe310/gloss/sys_getcwd.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -char * -_getcwd(char *buf, size_t size) -{ - errno = -ENOSYS; - return NULL; -} diff --git a/code/fe310/gloss/sys_getpid.c b/code/fe310/gloss/sys_getpid.c deleted file mode 100644 index 589ad11..0000000 --- a/code/fe310/gloss/sys_getpid.c +++ /dev/null @@ -1,7 +0,0 @@ -#include <errno.h> - -int -_getpid() -{ - return 1; -} diff --git a/code/fe310/gloss/sys_isatty.c b/code/fe310/gloss/sys_isatty.c deleted file mode 100644 index 70aec43..0000000 --- a/code/fe310/gloss/sys_isatty.c +++ /dev/null @@ -1,7 +0,0 @@ -#include <unistd.h> - -int -_isatty(int fd) -{ - return ((fd == STDIN_FILENO) || (fd == STDOUT_FILENO) || (fd == STDERR_FILENO)); -} diff --git a/code/fe310/gloss/sys_kill.c b/code/fe310/gloss/sys_kill.c deleted file mode 100644 index 9003f26..0000000 --- a/code/fe310/gloss/sys_kill.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_kill(int pid, int sig) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_link.c b/code/fe310/gloss/sys_link.c deleted file mode 100644 index 40d5912..0000000 --- a/code/fe310/gloss/sys_link.c +++ /dev/null @@ -1,7 +0,0 @@ -#include <errno.h> - -int _link(const char *old_name, const char *new_name) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_lseek.c b/code/fe310/gloss/sys_lseek.c deleted file mode 100644 index d28a781..0000000 --- a/code/fe310/gloss/sys_lseek.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <sys/types.h> -#include <errno.h> - -off_t -_lseek(int file, off_t ptr, int dir) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_lstat.c b/code/fe310/gloss/sys_lstat.c deleted file mode 100644 index 97a4585..0000000 --- a/code/fe310/gloss/sys_lstat.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> -#include <sys/stat.h> - -int _lstat(const char *file, struct stat *st) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_open.c b/code/fe310/gloss/sys_open.c deleted file mode 100644 index a59f627..0000000 --- a/code/fe310/gloss/sys_open.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_open(const char *name, int flags, int mode) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_openat.c b/code/fe310/gloss/sys_openat.c deleted file mode 100644 index 206de3b..0000000 --- a/code/fe310/gloss/sys_openat.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_openat(int dirfd, const char *name, int flags, int mode) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_read.c b/code/fe310/gloss/sys_read.c deleted file mode 100644 index 1857fc6..0000000 --- a/code/fe310/gloss/sys_read.c +++ /dev/null @@ -1,23 +0,0 @@ -#include <sys/types.h> -#include <errno.h> -#include <unistd.h> - -#include "platform.h" - -/* Read from a file. */ -ssize_t -_read(int fd, void *ptr, size_t len) -{ - if (fd != STDIN_FILENO) { - errno = ENOSYS; - return -1; - } - - char *current = ptr; - for (size_t i = 0; i < len; i++) { - volatile uint32_t r; - while ((r = UART0_REG(UART_REG_RXFIFO)) & 0x80000000); - current[i] = r & 0xFF; - } - return len; -} diff --git a/code/fe310/gloss/sys_sbrk.c b/code/fe310/gloss/sys_sbrk.c deleted file mode 100644 index ce10c90..0000000 --- a/code/fe310/gloss/sys_sbrk.c +++ /dev/null @@ -1,38 +0,0 @@ -#include <sys/types.h> - -/* brk is handled entirely within the C library. This limits METAL programs that - * use the C library to be disallowed from dynamically allocating memory - * without talking to the C library, but that sounds like a sane way to go - * about it. Note that there is no error checking anywhere in this file, users - * will simply get the relevant error when actually trying to use the memory - * that's been allocated. */ -extern char metal_segment_heap_target_start; -extern char metal_segment_heap_target_end; -static char *brk = &metal_segment_heap_target_start; - -int -_brk(void *addr) -{ - brk = addr; - return 0; -} - -char * -_sbrk(ptrdiff_t incr) -{ - char *old = brk; - - /* If __heap_size == 0, we can't allocate memory on the heap */ - if(&metal_segment_heap_target_start == &metal_segment_heap_target_end) { - return (void *)-1; - } - - /* Don't move the break past the end of the heap */ - if ((brk + incr) <= &metal_segment_heap_target_end) { - brk += incr; - } else { - return (void *)-1; - } - - return old; -} diff --git a/code/fe310/gloss/sys_stat.c b/code/fe310/gloss/sys_stat.c deleted file mode 100644 index 3c2e419..0000000 --- a/code/fe310/gloss/sys_stat.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -#include <sys/stat.h> - -int -_stat(const char *file, struct stat *st) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_sysconf.c b/code/fe310/gloss/sys_sysconf.c deleted file mode 100644 index 452a252..0000000 --- a/code/fe310/gloss/sys_sysconf.c +++ /dev/null @@ -1,16 +0,0 @@ -#include <unistd.h> -#include <time.h> - -/* Get configurable system variables. */ - -long -_sysconf(int name) -{ - switch (name) - { - case _SC_CLK_TCK: - return CLOCKS_PER_SEC; - } - - return -1; -} diff --git a/code/fe310/gloss/sys_unlink.c b/code/fe310/gloss/sys_unlink.c deleted file mode 100644 index b369d20..0000000 --- a/code/fe310/gloss/sys_unlink.c +++ /dev/null @@ -1,8 +0,0 @@ -#include <errno.h> - -int -_unlink(const char *name) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_utime.c b/code/fe310/gloss/sys_utime.c deleted file mode 100644 index 33d557a..0000000 --- a/code/fe310/gloss/sys_utime.c +++ /dev/null @@ -1,9 +0,0 @@ -#include <errno.h> -struct utimbuf; - -int -_utime(const char *path, const struct utimbuf *times) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_wait.c b/code/fe310/gloss/sys_wait.c deleted file mode 100644 index 9d459f1..0000000 --- a/code/fe310/gloss/sys_wait.c +++ /dev/null @@ -1,7 +0,0 @@ -#include <errno.h> - -int _wait(int *status) -{ - errno = ENOSYS; - return -1; -} diff --git a/code/fe310/gloss/sys_write.c b/code/fe310/gloss/sys_write.c deleted file mode 100644 index 2095940..0000000 --- a/code/fe310/gloss/sys_write.c +++ /dev/null @@ -1,22 +0,0 @@ -#include <sys/types.h> -#include <errno.h> -#include <unistd.h> - -#include "platform.h" - -/* Write to a file. */ -ssize_t -_write(int fd, const void *ptr, size_t len) -{ - if ((fd != STDOUT_FILENO) && (fd != STDERR_FILENO)) { - errno = ENOSYS; - return -1; - } - - const char *current = ptr; - for (size_t i = 0; i < len; i++) { - while (UART0_REG(UART_REG_TXFIFO) & 0x80000000); - UART0_REG(UART_REG_TXFIFO) = current[i]; - } - return len; -} |