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Tracking issue #16799
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* Replaces the exit assembly with the function from std.
* Reads the top-of-stack struct at program startup that can get information
like the pid.
* Changes the read and write functions to use the Pread and Pwrite syscalls
instead of the depreciated _READ and _WRITE
* Changes the openat function to use flags instead of perms.
Plan9 does not support perms when opening, just when creating.
* Adds an errstr function to read the errstr buf created by the kernel
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This also required implementing the necessary syntax in the x86_64 backend.
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After fixing some issues with inline assembly in the C backend, the std
cleanups have the side effect of making these functions compatible with
the backend, allowing it to be used on linux without linking libc.
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Removes the unused import tlcsprng
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At main startup, if the ELF auxiliary vector contains a stacksize value,
use it as a hint for the minimum stacksize required by the executable.
1. Never lower the hard-limit. Once a hard-limit is lowered, then it can
never be increased (including child processes).
2. If hint exceeds hard-limit then clamp hint to hard-limit.
3. If soft-limit exceeds hint then do nothing.
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Most of this migration was performed automatically with `zig fmt`. There
were a few exceptions which I had to manually fix:
* `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten
* `@truncate`'s fixup is incorrect for vectors
* Test cases are not formatted, and their error locations change
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Signed-off-by: Eric Joldasov <bratishkaerik@getgoogleoff.me>
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The Wasm backend now supports all features required to use
the full `start.zig` logic, rather than the simplified version.
With this commit we remove all references to the simplified logic
for Wasm specifically.
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closes #875
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you maniacs, you absolute monsters. degenerates. hooligans. criminals.
issue #2984 is coming for you.
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For SPIR-V, only export the main function if it is actually declared. Kernel
entry points will often have parameters and more than one kernel declared.
In general, SPIR-V binaries should mostly be compiled as libraries and not as
executables. However, this start code is required so that we can build test
executables.
Note that a call to isSpirV() would emit the code for that function, even though
the call is at comptime. To save that function from being emitted the checks
are just inlined manually.
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This was a poor naming choice; these are parameters, not arguments.
Parameters specify what kind of arguments are expected, whereas the arguments are the actual values passed.
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It's the type of a parameter, not an argument, but the prefix is redundant either way.
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* Fix _start on aarch64.
* Add fallbacks when a float type is unsupported.
Fixes #13357
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These are needed because clang doesn't support anything in naked
functions, not even assembly register inputs.
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* Enable advanced start support.
* Enable advanced test_runner support.
* Zig Language Reference's Hello World now works.
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This is not technically correct, but given that we are not yet able
to link against the CRT, it's a good default until then.
Add basic logging of generated symbol table in the linker.
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Rename all references of sparcv9 to sparc64, to make Zig align more with
other projects. Also, added new function to convert glibc arch name to Zig
arch name, since it refers to the architecture as sparcv9.
This is based on the suggestion by @kubkon in PR 11847.
(https://github.com/ziglang/zig/pull/11487#pullrequestreview-963761757)
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Also update std/build.zig to use stage2 function pointer semantics.
This gets us a little bit closer to `zig build` working, although it is
now hitting a new crash in the compiler.
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* use the real start code for LLVM backend with x86_64-linux
- there is still a check for zig_backend after initializing the TLS
area to skip some stuff.
* introduce new AIR instructions and implement them for the LLVM
backend. They are the same as `call` except with a modifier.
- call_always_tail
- call_never_tail
- call_never_inline
* LLVM backend calls hasRuntimeBitsIgnoringComptime in more places to
avoid unnecessarily depending on comptimeOnly being resolved for some
types.
* LLVM backend: remove duplicate code for setting linkage and value
name. The canonical place for this is in `updateDeclExports`.
* LLVM backend: do some assembly template massaging to make `%%`
rendered as `%`. More hacks will be needed to make inline assembly
catch up with stage1.
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This updates the test runner for stage2 to emit to stdout with the passed, skipped and failed tests
similar to the LLVM backend.
Another change to this is the start function, as it's now more in line with stage1's.
The stage2 test infrastructure for wasm/wasi has been updated to reflect this as well.
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Instead use the standarized option for communicating the
zig compiler backend at comptime, which is `zig_backend`. This was
introduced in commit 1c24ef0d0b09a12a1fe98056f2fc04de78a82df3.
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