danielandClaude Fable 5
75184e0651
Groundwork for the GCC driver: a compiler driver must spawn cc1/as/ld and know whether each stage succeeded. Kernel: the scheduler keeps an exit-code ledger (pid -> code; pids are monotonic so entries never alias), published during teardown right before waiters wake. SYS_EXIT records main()'s return value, SYS_KILL records 256+SIGKILL, and the exception handler records 256+signal mapped from the fault vector (#PF/#GP -> SIGSEGV, #DE/FP -> SIGFPE, #UD -> SIGILL). SYS_WAITPID now returns the code: 0..255 for a normal exit, 256+signal for a violent death. Process args grow from 256 bytes to 4 KiB (cc1 invocations do not fit in 256), with crt1 now parsing up to 255 argv entries from a static buffer. libc: new spawn.h with posix_spawn/posix_spawnp over SYS_SPAWN - libiberty's pex layer has a posix_spawn backend, so GCC's driver works without fork. argv is joined into the kernel args string (spaces in arguments rejected; no kernel quoting), envp is not transferred, and non-empty file actions fail loudly with ENOTSUP until the kernel can redirect stdio on spawn. waitpid() now decodes real POSIX status and the sys/wait.h macros distinguish exited from signaled children. Shell: prints [exit code N] after nonzero exits and [terminated by signal N] for killed or crashed children. Verified on the OS: cat on a missing file reports exit code 1; a window-close (clean exit 0) stays silent as it should. Co-Authored-By: Claude Fable 5 <[email protected]>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
#ifndef _LIBC_ERRNO_H
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#define _LIBC_ERRNO_H
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int errno;
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/* Linux errno numbering. */
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#define EPERM 1
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#define ENOENT 2
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#define ESRCH 3
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#define EINTR 4
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#define EIO 5
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#define ENXIO 6
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#define E2BIG 7
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#define ENOEXEC 8
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#define EBADF 9
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#define ECHILD 10
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#define EAGAIN 11
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#define ENOMEM 12
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#define EACCES 13
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#define EFAULT 14
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#define EBUSY 16
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#define EEXIST 17
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#define EXDEV 18
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#define ENODEV 19
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#define ENOTDIR 20
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#define EISDIR 21
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#define EINVAL 22
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#define ENFILE 23
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#define EMFILE 24
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#define ENOTTY 25
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#define EFBIG 27
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#define ENOSPC 28
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#define ESPIPE 29
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#define EROFS 30
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#define EMLINK 31
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#define EPIPE 32
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#define EDOM 33
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#define ERANGE 34
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#define EDEADLK 35
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#define ENAMETOOLONG 36
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#define ENOLCK 37
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#define ENOSYS 38
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#define ENOTEMPTY 39
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#define ELOOP 40
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#define EWOULDBLOCK EAGAIN
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#define EOVERFLOW 75
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#define ETIMEDOUT 110
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#define ENOTSUP 95
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBC_ERRNO_H */
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