36197c92a2
This changes the 64-bit kernel's support for the 32-bit sysenter instruction to use stored fields rather than constants for the user-mode return address, as the 32-bit kernel does. This adds a sysenter_return field to struct thread_info, as 32-bit has. There is no observable effect from this yet. It makes the assembly code independent of the 32-bit vDSO mapping address, paving the way for making the vDSO address vary as it does on the 32-bit kernel. [ akpm@linux-foundation.org: build fix on !CONFIG_IA32_EMULATION ] Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
126 lines
2.9 KiB
C
126 lines
2.9 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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#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 <asm/pda.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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#define DEFINE(sym, val) \
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asm volatile("\n->" #sym " %0 " #val : : "i" (val))
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#define BLANK() asm volatile("\n->" : : )
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#define OFFSET(sym, str, mem) \
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DEFINE(sym, offsetof(struct str, mem))
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#define __NO_STUBS 1
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#undef __SYSCALL
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#undef _ASM_X86_64_UNISTD_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(threadinfo_ ## 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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#define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
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ENTRY(kernelstack);
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ENTRY(oldrsp);
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ENTRY(pcurrent);
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ENTRY(irqcount);
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ENTRY(cpunumber);
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ENTRY(irqstackptr);
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ENTRY(data_offset);
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BLANK();
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#undef ENTRY
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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(eax);
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ENTRY(ebx);
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ENTRY(ecx);
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ENTRY(edx);
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ENTRY(esi);
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ENTRY(edi);
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ENTRY(ebp);
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ENTRY(esp);
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ENTRY(eip);
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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_sigframe32, 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(rbx);
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ENTRY(rbx);
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ENTRY(rcx);
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ENTRY(rdx);
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ENTRY(rsp);
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ENTRY(rbp);
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ENTRY(rsi);
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ENTRY(rdi);
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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(eflags);
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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, 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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return 0;
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}
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