e04ca28812
Removes the "-unix" element and with it any trademark exposure to The
Open Group.
The split follows the ecosystem layout: SchOS is the system, and the
kernel has its own name. Kernel-identity strings are the only places
that take SchIFT -- uname(2) sysname, /proc/version, and the two licence
sentences that say "kernel" outright. That is what every Unix does here:
`uname -s` on Linux reports the kernel, not the distribution. Everything
a user reads as the product -- panic screen, boot menu, error prefixes,
docs, LICENSE, NOTICE -- is SchOS.
schunix.img is schos.img, the logo assets and the musl TLS patch are
renamed, and __SCHUNIX__ is __SCHOS__ (the define and the patch that
consumes it moved together).
Two things the rename broke, both found by the bootcheck suite:
- shmtest wrote "SCHUNIX-MMAP-OK" with a hardcoded length of 15 and
compared it back by hand-counted offsets (m[3]=='U', m[14]=='K').
The shorter marker left the write running two bytes past the literal
and the compare reading past the data, failing a file-backed mmap
that was working correctly. Now written and compared through one
constant with sizeof.
- bootcheck asserted a 31-byte file after appending to
"hello-from-schunix"; the shorter string makes it 29.
Both are the same mistake: a string literal whose length is written out
somewhere else. Full suite green -- base, Tty, Ps, Sock, Fb, Usb, Evdev.
33 lines
1.4 KiB
C
33 lines
1.4 KiB
C
// SPDX-License-Identifier: Apache-2.0
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// Linux x86_64 syscall number -> SchOS syscall number translation.
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// Enabled per process by sys_enable_linux_abi (see kernel/sys/sys_compat.c).
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//
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// This file used to be the second half of a two-place registration scheme: a
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// hand-written `#define LINUX_foo N` for every Linux number, plus a hand-written
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// map entry pointing it at SYS_foo. Adding a syscall meant three edits across
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// two files, and forgetting this one left the syscall unreachable from every
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// musl-linked program while looking perfectly registered in table.inc.
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//
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// The map is now generated from kernel/sys/table.inc, which carries the Linux
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// number alongside the native one. There is nothing to hand-edit here.
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#include "types.h"
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#include "syscall.h"
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#define LINUX_NSYSCALL NSYSCALLS
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// Index: Linux x86_64 syscall number. Value: SchOS SYS_* number, or 0 for
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// "not implemented" (syscall() then returns -ENOSYS).
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//
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// Syscalls declared NO_LINUX in table.inc all land on the single scratch index
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// NO_LINUX. They overwrite each other there, which is harmless: no real Linux
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// syscall uses that number, so the slot is never dispatched.
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int linux_syscall_map[LINUX_NSYSCALL] = {
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#define SYSCALL(nr, lnr, name) [lnr] = SYS_##name,
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#define SYSCALL_ALIAS(lnr, name) [lnr] = SYS_##name,
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#include "table.inc"
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#undef SYSCALL
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#undef SYSCALL_ALIAS
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};
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int linux_syscall_map_size = LINUX_NSYSCALL;
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