diff options
Diffstat (limited to 'library/unwind')
| -rw-r--r-- | library/unwind/Cargo.toml | 3 | ||||
| -rw-r--r-- | library/unwind/build.rs | 25 | ||||
| -rw-r--r-- | library/unwind/src/lib.rs | 11 | ||||
| -rw-r--r-- | library/unwind/src/libunwind.rs | 14 |
4 files changed, 13 insertions, 40 deletions
diff --git a/library/unwind/Cargo.toml b/library/unwind/Cargo.toml index eab2717c4..9aa552ed8 100644 --- a/library/unwind/Cargo.toml +++ b/library/unwind/Cargo.toml @@ -19,9 +19,6 @@ libc = { version = "0.2.79", features = ['rustc-dep-of-std'], default-features = compiler_builtins = "0.1.0" cfg-if = "1.0" -[build-dependencies] -cc = "1.0.76" - [features] # Only applies for Linux and Fuchsia targets diff --git a/library/unwind/build.rs b/library/unwind/build.rs deleted file mode 100644 index 5c3c02fb6..000000000 --- a/library/unwind/build.rs +++ /dev/null @@ -1,25 +0,0 @@ -use std::env; - -fn main() { - println!("cargo:rerun-if-changed=build.rs"); - println!("cargo:rerun-if-env-changed=CARGO_CFG_MIRI"); - - if env::var_os("CARGO_CFG_MIRI").is_some() { - // Miri doesn't need the linker flags or a libunwind build. - return; - } - - let target = env::var("TARGET").expect("TARGET was not set"); - if target.contains("android") { - let build = cc::Build::new(); - - // Since ndk r23 beta 3 `libgcc` was replaced with `libunwind` thus - // check if we have `libunwind` available and if so use it. Otherwise - // fall back to `libgcc` to support older ndk versions. - let has_unwind = build.is_flag_supported("-lunwind").expect("Unable to invoke compiler"); - - if has_unwind { - println!("cargo:rustc-cfg=feature=\"system-llvm-libunwind\""); - } - } -} diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs index df4f286a5..335bded71 100644 --- a/library/unwind/src/lib.rs +++ b/library/unwind/src/lib.rs @@ -4,6 +4,7 @@ #![feature(staged_api)] #![feature(c_unwind)] #![feature(cfg_target_abi)] +#![feature(strict_provenance)] #![cfg_attr(not(target_env = "msvc"), feature(libc))] #![allow(internal_features)] @@ -75,14 +76,10 @@ cfg_if::cfg_if! { cfg_if::cfg_if! { if #[cfg(feature = "llvm-libunwind")] { compile_error!("`llvm-libunwind` is not supported for Android targets"); - } else if #[cfg(feature = "system-llvm-libunwind")] { + } else { #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))] #[link(name = "unwind", cfg(not(target_feature = "crt-static")))] extern "C" {} - } else { - #[link(name = "gcc", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))] - #[link(name = "gcc", cfg(not(target_feature = "crt-static")))] - extern "C" {} } } // Android's unwinding library depends on dl_iterate_phdr in `libdl`. @@ -145,6 +142,10 @@ extern "C" {} #[link(name = "gcc_s")] extern "C" {} +#[cfg(target_os = "aix")] +#[link(name = "unwind")] +extern "C" {} + #[cfg(target_os = "nto")] #[link(name = "gcc_s")] extern "C" {} diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs index a2bfa8e96..dba64aa74 100644 --- a/library/unwind/src/libunwind.rs +++ b/library/unwind/src/libunwind.rs @@ -1,6 +1,6 @@ #![allow(nonstandard_style)] -use libc::{c_int, c_void, uintptr_t}; +use libc::{c_int, c_void}; #[repr(C)] #[derive(Debug, Copy, Clone, PartialEq)] @@ -19,8 +19,8 @@ pub enum _Unwind_Reason_Code { pub use _Unwind_Reason_Code::*; pub type _Unwind_Exception_Class = u64; -pub type _Unwind_Word = uintptr_t; -pub type _Unwind_Ptr = uintptr_t; +pub type _Unwind_Word = *const u8; +pub type _Unwind_Ptr = *const u8; pub type _Unwind_Trace_Fn = extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code; @@ -214,7 +214,7 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe // On Android or ARM/Linux, these are implemented as macros: pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word { - let mut val: _Unwind_Word = 0; + let mut val: _Unwind_Word = core::ptr::null(); _Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32, &mut val as *mut _ as *mut c_void); val @@ -229,14 +229,14 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word { let val = _Unwind_GetGR(ctx, UNWIND_IP_REG); - (val & !1) as _Unwind_Word + val.map_addr(|v| v & !1) } pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word) { // Propagate thumb bit to instruction pointer - let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1; - let value = value | thumb_state; + let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG).addr() & 1; + let value = value.map_addr(|v| v | thumb_state); _Unwind_SetGR(ctx, UNWIND_IP_REG, value); } |