mirror of
https://github.com/NotAShelf/microfetch.git
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arch: add sparc32 support
This commit is contained in:
Amaan Qureshi
parent
7bbc47eb9f
commit
205e637d89
3 changed files with 214 additions and 7 deletions
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@ -7,7 +7,7 @@
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//!
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//! Supports `x86_64`, `aarch64`, `riscv64`, `loongarch64`, `s390x`,
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//! `powerpc64`, `arm` (armv7), `riscv32`, `sparc64`, `mips64`, `x86` (i686),
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//! and `powerpc` (ppc32) architectures.
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//! `powerpc` (ppc32), and `sparc` (sparc32) architectures.
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#![no_std]
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#![cfg_attr(
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@ -15,6 +15,7 @@
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target_arch = "powerpc64",
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target_arch = "powerpc",
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target_arch = "sparc64",
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target_arch = "sparc",
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target_arch = "mips64"
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),
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feature(asm_experimental_arch)
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@ -33,12 +34,13 @@
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target_arch = "sparc64",
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target_arch = "mips64",
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target_arch = "x86",
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target_arch = "powerpc"
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target_arch = "powerpc",
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target_arch = "sparc"
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)))]
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compile_error!(
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"Unsupported architecture: only x86_64, aarch64, riscv64, loongarch64, \
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s390x, powerpc64, arm, riscv32, sparc64, mips64, x86, and powerpc are \
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supported"
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s390x, powerpc64, arm, riscv32, sparc64, mips64, x86, powerpc, and sparc \
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are supported"
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);
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// Per-arch syscall implementations live in their own module files.
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@ -78,6 +80,9 @@ mod arch;
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#[cfg(target_arch = "powerpc")]
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#[path = "powerpc.rs"]
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mod arch;
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#[cfg(target_arch = "sparc")]
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#[path = "sparc.rs"]
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mod arch;
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/// Copies `n` bytes from `src` to `dest`.
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///
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@ -317,6 +322,7 @@ pub unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
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target_arch = "riscv32",
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target_arch = "x86",
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target_arch = "powerpc",
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target_arch = "sparc",
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target_arch = "mips64"
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)))]
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pub struct StatfsBuf {
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@ -363,7 +369,8 @@ pub struct StatfsBuf {
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target_arch = "arm",
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target_arch = "riscv32",
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target_arch = "x86",
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target_arch = "powerpc"
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target_arch = "powerpc",
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target_arch = "sparc"
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))]
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pub struct StatfsBuf {
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pub f_type: u32,
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@ -476,7 +483,8 @@ pub fn read_file_fast(path: &str, buffer: &mut [u8]) -> Result<usize, i32> {
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target_arch = "arm",
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target_arch = "riscv32",
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target_arch = "x86",
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target_arch = "powerpc"
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target_arch = "powerpc",
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target_arch = "sparc"
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)))]
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pub struct SysInfo {
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pub uptime: i64,
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@ -505,7 +513,8 @@ pub struct SysInfo {
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target_arch = "arm",
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target_arch = "riscv32",
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target_arch = "x86",
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target_arch = "powerpc"
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target_arch = "powerpc",
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target_arch = "sparc"
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))]
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pub struct SysInfo {
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pub uptime: i32,
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165
crates/asm/src/sparc.rs
Normal file
165
crates/asm/src/sparc.rs
Normal file
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@ -0,0 +1,165 @@
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//! Syscall implementations for `sparc`.
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use super::{StatfsBuf, SysInfo, UtsNameBuf};
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pub(super) unsafe fn sys_open(path: *const u8, flags: i32) -> i32 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 5i32, // SYS_open
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inlateout("o0") path => ret,
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in("o1") flags,
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in("o2") 0i32, // mode
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 3i32, // SYS_read
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inlateout("o0") fd => ret,
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in("o1") buf,
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in("o2") count,
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options(nostack)
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);
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ret as isize
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}
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}
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pub(super) unsafe fn sys_write(fd: i32, buf: *const u8, count: usize) -> isize {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 4i32, // SYS_write
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inlateout("o0") fd => ret,
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in("o1") buf,
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in("o2") count,
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options(nostack)
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);
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ret as isize
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}
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}
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pub(super) unsafe fn sys_close(fd: i32) -> i32 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 6i32, // SYS_close
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inlateout("o0") fd => ret,
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_uname(buf: *mut UtsNameBuf) -> i32 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 189i32, // SYS_newuname
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inlateout("o0") buf => ret,
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_statfs(path: *const u8, buf: *mut StatfsBuf) -> i32 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 234i32, // SYS_statfs64
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inlateout("o0") path => ret,
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in("o1") core::mem::size_of::<StatfsBuf>(),
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in("o2") buf,
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_sysinfo(info: *mut SysInfo) -> i64 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 214_i32, // __NR_sysinfo
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inlateout("o0") info => ret,
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options(nostack)
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);
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i64::from(ret)
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}
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}
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pub(super) unsafe fn sys_sched_getaffinity(
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pid: i32,
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mask_size: usize,
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mask: *mut u8,
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) -> i32 {
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unsafe {
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let ret: i32;
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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"bcs,a 1f",
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"sub %g0, %o0, %o0",
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"1:",
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nr = in(reg) 260i32, // __NR_sched_getaffinity
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inlateout("o0") pid => ret,
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in("o1") mask_size,
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in("o2") mask,
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options(nostack)
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);
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ret
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}
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}
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pub(super) unsafe fn sys_exit(code: i32) -> ! {
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unsafe {
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core::arch::asm!(
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"mov {nr}, %g1",
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"ta 0x10",
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nr = in(reg) 1i32, // SYS_exit
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in("o0") code,
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options(noreturn, nostack)
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);
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}
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}
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@ -5,6 +5,7 @@
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target_arch = "powerpc64",
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target_arch = "powerpc",
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target_arch = "sparc64",
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target_arch = "sparc",
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target_arch = "mips64"
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),
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feature(asm_experimental_arch)
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@ -247,6 +248,38 @@ unsafe extern "C" fn _start() {
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);
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}
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#[cfg(target_arch = "sparc")]
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#[unsafe(no_mangle)]
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#[unsafe(naked)]
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unsafe extern "C" fn _start() {
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naked_asm!(
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"mov %g0, %fp",
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"add %sp, 64, %o0", // first arg = &argc (past the 64-byte window save)
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"and %sp, -16, %sp", // align sp to 16 bytes
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"sub %sp, 64, %sp", // reserve window save area
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"call {entry_rust}",
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"nop", // delay slot
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"mov 1, %g1", // SYS_exit (code already in %o0)
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"ta 0x10",
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entry_rust = sym entry_rust,
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);
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}
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// SPARC V8 has no 1-byte CAS, so rustc emits calls to libatomic for byte
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// atomics. We're single-threaded with panic=abort, so a plain load/store is
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// already correct.
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#[cfg(all(not(test), target_arch = "sparc"))]
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#[unsafe(no_mangle)]
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extern "C" fn __atomic_load_1(ptr: *const u8, _order: i32) -> u8 {
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unsafe { core::ptr::read_volatile(ptr) }
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}
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#[cfg(all(not(test), target_arch = "sparc"))]
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#[unsafe(no_mangle)]
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extern "C" fn __atomic_store_1(ptr: *mut u8, val: u8, _order: i32) {
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unsafe { core::ptr::write_volatile(ptr, val) }
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}
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// Global allocator
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#[global_allocator]
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static ALLOCATOR: BumpAllocator = BumpAllocator::new();
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