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Implement -no-crt entry point on linux

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This commit is contained in:
flysand7
2023-10-22 01:58:35 +11:00
parent 566a11a585
commit 2e66d621b5
4 changed files with 93 additions and 8 deletions
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core/runtime/entry_unix.odin
+32 -8
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@@ -21,13 +21,37 @@ when ODIN_BUILD_MODE == .Dynamic {
return 0
}
} else when !ODIN_TEST && !ODIN_NO_ENTRY_POINT {
@(link_name="main", linkage="strong", require)
main :: proc "c" (argc: i32, argv: [^]cstring) -> i32 {
args__ = argv[:argc]
context = default_context()
#force_no_inline _startup_runtime()
intrinsics.__entry_point()
#force_no_inline _cleanup_runtime()
return 0
when ODIN_NO_CRT {
// NOTE(flysand): We need to start from assembly because we need
// to retrieve argc and argv from the stack
when ODIN_ARCH == .amd64 {
@require foreign import entry "entry_unix_no_crt_amd64.asm"
} else when ODIN_ARCH == .i386 {
@require foreign import entry "entry_unix_no_crt_i386.asm"
}
@(link_name="_start_odin", linkage="strong", require)
_start_odin :: proc "c" (argc: i32, argv: [^]cstring) -> ! {
args__ = argv[:argc]
context = default_context()
#force_no_inline _startup_runtime()
intrinsics.__entry_point()
#force_no_inline _cleanup_runtime()
when ODIN_ARCH == .amd64 {
intrinsics.syscall(/*SYS_exit = */60)
} else when ODIN_ARCH == .i386 {
intrinsics.syscall(/*SYS_exit = */1)
}
unreachable()
}
} else {
@(link_name="main", linkage="strong", require)
main :: proc "c" (argc: i32, argv: [^]cstring) -> i32 {
args__ = argv[:argc]
context = default_context()
#force_no_inline _startup_runtime()
intrinsics.__entry_point()
#force_no_inline _cleanup_runtime()
return 0
}
}
}