a5a2f8e2ac
Express the available number of syscalls in a standard way by defining NR_syscalls. The common way to define it is to place its definition in asm/unistd.h However, the number of syscalls is defined using __NR_syscall_max in x86-64 after building a dynamic header file "asm-offsets.h" The source file that generates this header, asm-offsets-64.c includes unistd.h, then if we want to express NR_syscalls from __NR_syscall_max in unistd.h only after generating the dynamic header file, we need a watchguard. If unistd.h is included from asm-offsets-64.c, then we are generating asm-offset.h which defines __NR_syscall_max. At this time, we don't want to (we can't) define NR_syscalls, then we do nothing. Otherwise we define NR_syscalls because we know asm-offsets.h has been generated. Signed-off-by: Jason Baron <jbaron@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Jiaying Zhang <jiayingz@google.com> Cc: Martin Bligh <mbligh@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Josh Stone <jistone@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anwin <hpa@zytor.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> LKML-Reference: <20090826160910.GB2658@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/*
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* Generate definitions needed by assembly language modules.
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* This code generates raw asm output which is post-processed to extract
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* and format the required data.
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*/
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#define COMPILE_OFFSETS
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#include <linux/crypto.h>
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#include <linux/sched.h>
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#include <linux/stddef.h>
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#include <linux/errno.h>
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#include <linux/hardirq.h>
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#include <linux/suspend.h>
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#include <linux/kbuild.h>
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#include <asm/processor.h>
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#include <asm/segment.h>
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#include <asm/thread_info.h>
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#include <asm/ia32.h>
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#include <asm/bootparam.h>
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#include <asm/suspend.h>
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#include <xen/interface/xen.h>
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#include <asm/sigframe.h>
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#define __NO_STUBS 1
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#undef __SYSCALL
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#undef _ASM_X86_UNISTD_64_H
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#define __SYSCALL(nr, sym) [nr] = 1,
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static char syscalls[] = {
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#include <asm/unistd.h>
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};
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int main(void)
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{
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#define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
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ENTRY(state);
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ENTRY(flags);
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ENTRY(pid);
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BLANK();
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#undef ENTRY
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#define ENTRY(entry) DEFINE(TI_ ## entry, offsetof(struct thread_info, entry))
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ENTRY(flags);
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ENTRY(addr_limit);
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ENTRY(preempt_count);
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ENTRY(status);
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#ifdef CONFIG_IA32_EMULATION
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ENTRY(sysenter_return);
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#endif
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BLANK();
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#undef ENTRY
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#ifdef CONFIG_PARAVIRT
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BLANK();
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OFFSET(PARAVIRT_enabled, pv_info, paravirt_enabled);
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OFFSET(PARAVIRT_PATCH_pv_cpu_ops, paravirt_patch_template, pv_cpu_ops);
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OFFSET(PARAVIRT_PATCH_pv_irq_ops, paravirt_patch_template, pv_irq_ops);
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OFFSET(PV_IRQ_irq_disable, pv_irq_ops, irq_disable);
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OFFSET(PV_IRQ_irq_enable, pv_irq_ops, irq_enable);
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OFFSET(PV_IRQ_adjust_exception_frame, pv_irq_ops, adjust_exception_frame);
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OFFSET(PV_CPU_iret, pv_cpu_ops, iret);
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OFFSET(PV_CPU_usergs_sysret32, pv_cpu_ops, usergs_sysret32);
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OFFSET(PV_CPU_usergs_sysret64, pv_cpu_ops, usergs_sysret64);
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OFFSET(PV_CPU_irq_enable_sysexit, pv_cpu_ops, irq_enable_sysexit);
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OFFSET(PV_CPU_swapgs, pv_cpu_ops, swapgs);
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OFFSET(PV_MMU_read_cr2, pv_mmu_ops, read_cr2);
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#endif
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#ifdef CONFIG_IA32_EMULATION
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#define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
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ENTRY(ax);
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ENTRY(bx);
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ENTRY(cx);
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ENTRY(dx);
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ENTRY(si);
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ENTRY(di);
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ENTRY(bp);
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ENTRY(sp);
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ENTRY(ip);
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BLANK();
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#undef ENTRY
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DEFINE(IA32_RT_SIGFRAME_sigcontext,
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offsetof (struct rt_sigframe_ia32, uc.uc_mcontext));
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BLANK();
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#endif
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DEFINE(pbe_address, offsetof(struct pbe, address));
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DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
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DEFINE(pbe_next, offsetof(struct pbe, next));
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BLANK();
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#define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
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ENTRY(bx);
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ENTRY(bx);
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ENTRY(cx);
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ENTRY(dx);
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ENTRY(sp);
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ENTRY(bp);
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ENTRY(si);
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ENTRY(di);
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ENTRY(r8);
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ENTRY(r9);
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ENTRY(r10);
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ENTRY(r11);
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ENTRY(r12);
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ENTRY(r13);
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ENTRY(r14);
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ENTRY(r15);
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ENTRY(flags);
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BLANK();
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#undef ENTRY
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#define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
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ENTRY(cr0);
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ENTRY(cr2);
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ENTRY(cr3);
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ENTRY(cr4);
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ENTRY(cr8);
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BLANK();
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#undef ENTRY
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DEFINE(TSS_ist, offsetof(struct tss_struct, x86_tss.ist));
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BLANK();
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DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
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BLANK();
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DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
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BLANK();
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OFFSET(BP_scratch, boot_params, scratch);
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OFFSET(BP_loadflags, boot_params, hdr.loadflags);
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OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
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OFFSET(BP_version, boot_params, hdr.version);
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OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
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BLANK();
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DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
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#ifdef CONFIG_XEN
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BLANK();
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OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
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OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
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#undef ENTRY
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#endif
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return 0;
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}
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