Reject unsupported naked functions
Transition unsupported naked functions future incompatibility lint into an error: * Naked functions must contain a single inline assembly block. Introduced as future incompatibility lint in 1.50 #79653. Change into an error fixes a soundness issue described in #32489. * Naked functions must not use any forms of inline attribute. Introduced as future incompatibility lint in 1.56 #87652.
This commit is contained in:
Tomasz Miąsko
parent
84e918971d
commit
888332fee4
9 changed files with 182 additions and 295 deletions
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@ -1,42 +1,32 @@
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// compile-flags: -C no-prepopulate-passes
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// needs-asm-support
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// only-x86_64
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#![crate_type = "lib"]
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#![feature(naked_functions)]
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use std::arch::asm;
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// CHECK: Function Attrs: naked
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// CHECK-NEXT: define{{.*}}void @naked_empty()
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#[no_mangle]
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#[naked]
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pub fn naked_empty() {
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pub unsafe extern "C" fn naked_empty() {
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// CHECK-NEXT: {{.+}}:
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// CHECK-NEXT: ret void
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// CHECK-NEXT: call void asm
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// CHECK-NEXT: unreachable
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asm!("ret",
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options(noreturn));
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}
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// CHECK: Function Attrs: naked
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// CHECK-NEXT: define{{.*}}i{{[0-9]+}} @naked_with_args_and_return(i64 %a, i64 %b)
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#[no_mangle]
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#[naked]
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// CHECK-NEXT: define{{.*}}void @naked_with_args(i{{[0-9]+( %a)?}})
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pub fn naked_with_args(a: isize) {
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pub unsafe extern "C" fn naked_with_args_and_return(a: isize, b: isize) -> isize {
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// CHECK-NEXT: {{.+}}:
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// CHECK: ret void
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}
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// CHECK: Function Attrs: naked
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// CHECK-NEXT: define{{.*}}i{{[0-9]+}} @naked_with_return()
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#[no_mangle]
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#[naked]
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pub fn naked_with_return() -> isize {
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// CHECK-NEXT: {{.+}}:
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// CHECK-NEXT: ret i{{[0-9]+}} 0
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0
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}
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// CHECK: Function Attrs: naked
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// CHECK-NEXT: define{{.*}}i{{[0-9]+}} @naked_with_args_and_return(i{{[0-9]+( %a)?}})
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#[no_mangle]
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#[naked]
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pub fn naked_with_args_and_return(a: isize) -> isize {
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// CHECK-NEXT: {{.+}}:
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// CHECK: ret i{{[0-9]+}} 0
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0
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// CHECK-NEXT: call void asm
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// CHECK-NEXT: unreachable
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asm!("lea rax, [rdi + rsi]",
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"ret",
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options(noreturn));
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}
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@ -7,7 +7,6 @@
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use std::arch::asm;
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#[inline(always)]
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#[naked]
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#[no_mangle]
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pub unsafe extern "C" fn f() {
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@ -32,8 +32,7 @@ pub unsafe extern "C" fn patterns(
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#[naked]
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pub unsafe extern "C" fn inc(a: u32) -> u32 {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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a + 1
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//~^ ERROR referencing function parameters is not allowed in naked functions
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}
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@ -42,21 +41,18 @@ pub unsafe extern "C" fn inc(a: u32) -> u32 {
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pub unsafe extern "C" fn inc_asm(a: u32) -> u32 {
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asm!("/* {0} */", in(reg) a, options(noreturn));
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//~^ ERROR referencing function parameters is not allowed in naked functions
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//~| WARN only `const` and `sym` operands are supported in naked functions
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//~| WARN this was previously accepted
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//~| ERROR only `const` and `sym` operands are supported in naked functions
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}
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#[naked]
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pub unsafe extern "C" fn inc_closure(a: u32) -> u32 {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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(|| a + 1)()
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}
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#[naked]
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pub unsafe extern "C" fn unsupported_operands() {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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let mut a = 0usize;
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let mut b = 0usize;
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let mut c = 0usize;
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@ -65,11 +61,9 @@ pub unsafe extern "C" fn unsupported_operands() {
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const F: usize = 0usize;
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static G: usize = 0usize;
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asm!("/* {0} {1} {2} {3} {4} {5} {6} */",
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//~^ WARN asm in naked functions must use `noreturn` option
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//~| WARN this was previously accepted
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//~^ ERROR asm in naked functions must use `noreturn` option
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in(reg) a,
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//~^ WARN only `const` and `sym` operands are supported in naked functions
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//~| WARN this was previously accepted
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//~^ ERROR only `const` and `sym` operands are supported in naked functions
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inlateout(reg) b,
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inout(reg) c,
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lateout(reg) d,
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@ -81,31 +75,25 @@ pub unsafe extern "C" fn unsupported_operands() {
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#[naked]
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pub extern "C" fn missing_assembly() {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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}
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#[naked]
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pub extern "C" fn too_many_asm_blocks() {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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asm!("");
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//~^ WARN asm in naked functions must use `noreturn` option
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//~| WARN this was previously accepted
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//~^ ERROR asm in naked functions must use `noreturn` option
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asm!("");
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//~^ WARN asm in naked functions must use `noreturn` option
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//~| WARN this was previously accepted
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//~^ ERROR asm in naked functions must use `noreturn` option
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asm!("");
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//~^ WARN asm in naked functions must use `noreturn` option
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//~| WARN this was previously accepted
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//~^ ERROR asm in naked functions must use `noreturn` option
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asm!("", options(noreturn));
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}
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pub fn outer(x: u32) -> extern "C" fn(usize) -> usize {
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#[naked]
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pub extern "C" fn inner(y: usize) -> usize {
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//~^ WARN naked functions must contain a single asm block
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//~| WARN this was previously accepted
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//~^ ERROR naked functions must contain a single asm block
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*&y
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//~^ ERROR referencing function parameters is not allowed in naked functions
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}
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@ -115,18 +103,15 @@ pub fn outer(x: u32) -> extern "C" fn(usize) -> usize {
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#[naked]
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unsafe extern "C" fn invalid_options() {
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asm!("", options(nomem, preserves_flags, noreturn));
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//~^ WARN asm options unsupported in naked functions: `nomem`, `preserves_flags`
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//~| WARN this was previously accepted
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//~^ ERROR asm options unsupported in naked functions: `nomem`, `preserves_flags`
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}
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#[naked]
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unsafe extern "C" fn invalid_options_continued() {
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asm!("", options(readonly, nostack), options(pure));
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//~^ ERROR asm with the `pure` option must have at least one output
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//~| WARN asm options unsupported in naked functions: `nostack`, `pure`, `readonly`
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//~| WARN this was previously accepted
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//~| WARN asm in naked functions must use `noreturn` option
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//~| WARN this was previously accepted
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//~| ERROR asm options unsupported in naked functions: `nostack`, `pure`, `readonly`
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//~| ERROR asm in naked functions must use `noreturn` option
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}
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#[naked]
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@ -177,38 +162,32 @@ pub unsafe extern "C" fn inline_none() {
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#[naked]
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#[inline]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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pub unsafe extern "C" fn inline_hint() {
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asm!("", options(noreturn));
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}
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#[naked]
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#[inline(always)]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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pub unsafe extern "C" fn inline_always() {
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asm!("", options(noreturn));
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}
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#[naked]
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#[inline(never)]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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pub unsafe extern "C" fn inline_never() {
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asm!("", options(noreturn));
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}
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#[naked]
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#[inline]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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#[inline(always)]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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#[inline(never)]
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//~^ WARN naked functions cannot be inlined
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//~| WARN this was previously accepted
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//~^ ERROR naked functions cannot be inlined
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pub unsafe extern "C" fn inline_all() {
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asm!("", options(noreturn));
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}
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@ -1,5 +1,5 @@
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error: asm with the `pure` option must have at least one output
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--> $DIR/naked-functions.rs:124:14
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--> $DIR/naked-functions.rs:111:14
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LL | asm!("", options(readonly, nostack), options(pure));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^
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@ -29,66 +29,54 @@ LL | P { x, y }: P,
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| ^^^^^^^^^^
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error: referencing function parameters is not allowed in naked functions
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--> $DIR/naked-functions.rs:37:5
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--> $DIR/naked-functions.rs:36:5
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LL | a + 1
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| ^
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= help: follow the calling convention in asm block to use parameters
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warning: naked functions must contain a single asm block
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error[E0787]: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:34:1
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LL | / pub unsafe extern "C" fn inc(a: u32) -> u32 {
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LL | |
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LL | |
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LL | | a + 1
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| | ----- non-asm is unsupported in naked functions
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LL | |
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LL | | }
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| |_^
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= note: `#[warn(unsupported_naked_functions)]` on by default
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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error: referencing function parameters is not allowed in naked functions
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--> $DIR/naked-functions.rs:43:31
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--> $DIR/naked-functions.rs:42:31
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LL | asm!("/* {0} */", in(reg) a, options(noreturn));
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| ^
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= help: follow the calling convention in asm block to use parameters
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warning: only `const` and `sym` operands are supported in naked functions
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--> $DIR/naked-functions.rs:43:23
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error[E0787]: only `const` and `sym` operands are supported in naked functions
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--> $DIR/naked-functions.rs:42:23
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LL | asm!("/* {0} */", in(reg) a, options(noreturn));
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| ^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:50:1
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error[E0787]: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:48:1
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LL | / pub unsafe extern "C" fn inc_closure(a: u32) -> u32 {
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LL | |
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LL | |
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LL | | (|| a + 1)()
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| | ------------ non-asm is unsupported in naked functions
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LL | | }
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| |_^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: only `const` and `sym` operands are supported in naked functions
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--> $DIR/naked-functions.rs:70:10
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error[E0787]: only `const` and `sym` operands are supported in naked functions
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--> $DIR/naked-functions.rs:65:10
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LL | in(reg) a,
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| ^^^^^^^^^
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...
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LL |
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LL | inlateout(reg) b,
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| ^^^^^^^^^^^^^^^^
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LL | inout(reg) c,
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@ -97,31 +85,24 @@ LL | lateout(reg) d,
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| ^^^^^^^^^^^^^^
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LL | out(reg) e,
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| ^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:67:5
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error[E0787]: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:63:5
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LL | / asm!("/* {0} {1} {2} {3} {4} {5} {6} */",
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LL | |
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LL | |
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LL | | in(reg) a,
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LL | |
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... |
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LL | | sym G,
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LL | | );
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| |_____^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:57:1
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error[E0787]: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:54:1
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LL | / pub unsafe extern "C" fn unsupported_operands() {
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LL | |
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LL | |
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LL | | let mut a = 0usize;
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| | ------------------- non-asm is unsupported in naked functions
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LL | | let mut b = 0usize;
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@ -136,123 +117,90 @@ LL | | let mut e = 0usize;
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LL | | );
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LL | | }
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| |_^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:83:1
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error[E0787]: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:77:1
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LL | / pub extern "C" fn missing_assembly() {
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LL | |
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LL | |
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LL | | }
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| |_^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:92:5
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error[E0787]: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:84:5
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LL | asm!("");
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| ^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:95:5
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error[E0787]: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:86:5
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LL | asm!("");
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| ^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:98:5
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error[E0787]: asm in naked functions must use `noreturn` option
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--> $DIR/naked-functions.rs:88:5
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LL | asm!("");
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| ^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
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warning: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:89:1
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error[E0787]: naked functions must contain a single asm block
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--> $DIR/naked-functions.rs:82:1
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LL | / pub extern "C" fn too_many_asm_blocks() {
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LL | |
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LL | | asm!("");
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LL | |
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LL | | asm!("");
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... |
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| | -------- multiple asm blocks are unsupported in naked functions
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LL | |
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LL | | asm!("");
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| | -------- multiple asm blocks are unsupported in naked functions
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... |
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LL | | asm!("");
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| | -------- multiple asm blocks are unsupported in naked functions
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... |
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LL | |
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LL | | asm!("", options(noreturn));
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| | --------------------------- multiple asm blocks are unsupported in naked functions
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LL | | }
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| |_^
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|
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
error: referencing function parameters is not allowed in naked functions
|
||||
--> $DIR/naked-functions.rs:109:11
|
||||
--> $DIR/naked-functions.rs:97:11
|
||||
|
|
||||
LL | *&y
|
||||
| ^
|
||||
|
|
||||
= help: follow the calling convention in asm block to use parameters
|
||||
|
||||
warning: naked functions must contain a single asm block
|
||||
--> $DIR/naked-functions.rs:106:5
|
||||
error[E0787]: naked functions must contain a single asm block
|
||||
--> $DIR/naked-functions.rs:95:5
|
||||
|
|
||||
LL | / pub extern "C" fn inner(y: usize) -> usize {
|
||||
LL | |
|
||||
LL | |
|
||||
LL | | *&y
|
||||
| | --- non-asm is unsupported in naked functions
|
||||
LL | |
|
||||
LL | | }
|
||||
| |_____^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: asm options unsupported in naked functions: `nomem`, `preserves_flags`
|
||||
--> $DIR/naked-functions.rs:117:5
|
||||
error[E0787]: asm options unsupported in naked functions: `nomem`, `preserves_flags`
|
||||
--> $DIR/naked-functions.rs:105:5
|
||||
|
|
||||
LL | asm!("", options(nomem, preserves_flags, noreturn));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: asm options unsupported in naked functions: `nostack`, `pure`, `readonly`
|
||||
--> $DIR/naked-functions.rs:124:5
|
||||
error[E0787]: asm options unsupported in naked functions: `nostack`, `pure`, `readonly`
|
||||
--> $DIR/naked-functions.rs:111:5
|
||||
|
|
||||
LL | asm!("", options(readonly, nostack), options(pure));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: asm in naked functions must use `noreturn` option
|
||||
--> $DIR/naked-functions.rs:124:5
|
||||
error[E0787]: asm in naked functions must use `noreturn` option
|
||||
--> $DIR/naked-functions.rs:111:5
|
||||
|
|
||||
LL | asm!("", options(readonly, nostack), options(pure));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: Rust ABI is unsupported in naked functions
|
||||
--> $DIR/naked-functions.rs:133:15
|
||||
--> $DIR/naked-functions.rs:118:15
|
||||
|
|
||||
LL | pub unsafe fn default_abi() {
|
||||
| ^^^^^^^^^^^
|
||||
|
|
@ -260,64 +208,47 @@ LL | pub unsafe fn default_abi() {
|
|||
= note: `#[warn(undefined_naked_function_abi)]` on by default
|
||||
|
||||
warning: Rust ABI is unsupported in naked functions
|
||||
--> $DIR/naked-functions.rs:139:15
|
||||
--> $DIR/naked-functions.rs:124:15
|
||||
|
|
||||
LL | pub unsafe fn rust_abi() {
|
||||
| ^^^^^^^^
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:179:1
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:164:1
|
||||
|
|
||||
LL | #[inline]
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:171:1
|
||||
|
|
||||
LL | #[inline(always)]
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:178:1
|
||||
|
|
||||
LL | #[inline(never)]
|
||||
| ^^^^^^^^^^^^^^^^
|
||||
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:185:1
|
||||
|
|
||||
LL | #[inline]
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:187:1
|
||||
|
|
||||
LL | #[inline(always)]
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:195:1
|
||||
error: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:189:1
|
||||
|
|
||||
LL | #[inline(never)]
|
||||
| ^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:203:1
|
||||
|
|
||||
LL | #[inline]
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:206:1
|
||||
|
|
||||
LL | #[inline(always)]
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
warning: naked functions cannot be inlined
|
||||
--> $DIR/naked-functions.rs:209:1
|
||||
|
|
||||
LL | #[inline(never)]
|
||||
| ^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
|
||||
= note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
|
||||
|
||||
error: aborting due to 8 previous errors; 23 warnings emitted
|
||||
error: aborting due to 29 previous errors; 2 warnings emitted
|
||||
|
||||
For more information about this error, try `rustc --explain E0787`.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue