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9142be9e64
The direct-call syscall dispatch function doesn't know that the exit()
and exit_group() syscall handlers don't return, so the call sites aren't
optimized accordingly.
Fix that by marking the exit syscall declarations __noreturn.
Fixes the following warnings:
vmlinux.o: warning: objtool: x64_sys_call+0x2804: __x64_sys_exit() is missing a __noreturn annotation
vmlinux.o: warning: objtool: ia32_sys_call+0x29b6: __ia32_sys_exit_group() is missing a __noreturn annotation
Fixes: 1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
Closes: https://lkml.kernel.org/lkml/6dba9b32-db2c-4e6d-9500-7a08852f17a3@paulmck-laptop
Reported-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/5d8882bc077d8eadcc7fd1740b56dfb781f12288.1719381528.git.jpoimboe@kernel.org
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This is a (sorted!) list of all known __noreturn functions in the kernel.
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* It's needed for objtool to properly reverse-engineer the control flow graph.
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*
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* Yes, this is unfortunate. A better solution is in the works.
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*/
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NORETURN(__fortify_panic)
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NORETURN(__ia32_sys_exit)
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NORETURN(__ia32_sys_exit_group)
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NORETURN(__kunit_abort)
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NORETURN(__module_put_and_kthread_exit)
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NORETURN(__reiserfs_panic)
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NORETURN(__stack_chk_fail)
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NORETURN(__tdx_hypercall_failed)
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NORETURN(__ubsan_handle_builtin_unreachable)
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NORETURN(__x64_sys_exit)
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NORETURN(__x64_sys_exit_group)
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NORETURN(arch_cpu_idle_dead)
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NORETURN(bch2_trans_in_restart_error)
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NORETURN(bch2_trans_restart_error)
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NORETURN(cpu_bringup_and_idle)
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NORETURN(cpu_startup_entry)
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NORETURN(do_exit)
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NORETURN(do_group_exit)
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NORETURN(do_task_dead)
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NORETURN(ex_handler_msr_mce)
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NORETURN(hlt_play_dead)
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NORETURN(hv_ghcb_terminate)
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NORETURN(kthread_complete_and_exit)
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NORETURN(kthread_exit)
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NORETURN(kunit_try_catch_throw)
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NORETURN(machine_real_restart)
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NORETURN(make_task_dead)
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NORETURN(mpt_halt_firmware)
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NORETURN(nmi_panic_self_stop)
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NORETURN(panic)
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NORETURN(panic_smp_self_stop)
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NORETURN(rest_init)
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NORETURN(rewind_stack_and_make_dead)
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NORETURN(sev_es_terminate)
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NORETURN(snp_abort)
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NORETURN(start_kernel)
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NORETURN(stop_this_cpu)
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NORETURN(usercopy_abort)
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NORETURN(x86_64_start_kernel)
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NORETURN(x86_64_start_reservations)
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NORETURN(xen_cpu_bringup_again)
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NORETURN(xen_start_kernel)
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