9f0b4807a4
The userspace stacks mostly have a stack (and in the case of the syscall stub we can just set their stack pointer) that points to the location of the stub data page already. Rework the stubs to use the stack pointer to derive the start of the data page, rather than requiring it to be hard-coded. In the clone stub, also integrate the int3 into the stack remap, since we really must not use the stack while we remap it. This prepares for putting the stub at a variable location that's not part of the normal address space of the userspace processes running inside the UML machine. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* for use by sys-$SUBARCH/kernel-offsets.c */
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#include <stub-data.h>
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DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
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DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
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DEFINE(UM_KERN_PAGE_MASK, PAGE_MASK);
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DEFINE(UM_KERN_PAGE_SHIFT, PAGE_SHIFT);
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DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
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DEFINE(UM_ELF_CLASS, ELF_CLASS);
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DEFINE(UM_ELFCLASS32, ELFCLASS32);
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DEFINE(UM_ELFCLASS64, ELFCLASS64);
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DEFINE(UM_NR_CPUS, NR_CPUS);
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DEFINE(UM_GFP_KERNEL, GFP_KERNEL);
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DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
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/* For crypto assembler code. */
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DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
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DEFINE(UM_THREAD_SIZE, THREAD_SIZE);
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DEFINE(UM_HZ, HZ);
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DEFINE(UM_USEC_PER_SEC, USEC_PER_SEC);
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DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
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DEFINE(UM_NSEC_PER_USEC, NSEC_PER_USEC);
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#ifdef CONFIG_PRINTK
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DEFINE(UML_CONFIG_PRINTK, CONFIG_PRINTK);
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#endif
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#ifdef CONFIG_NO_HZ_COMMON
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DEFINE(UML_CONFIG_NO_HZ_COMMON, CONFIG_NO_HZ_COMMON);
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#endif
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#ifdef CONFIG_UML_X86
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DEFINE(UML_CONFIG_UML_X86, CONFIG_UML_X86);
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#endif
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#ifdef CONFIG_64BIT
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DEFINE(UML_CONFIG_64BIT, CONFIG_64BIT);
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#endif
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#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
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DEFINE(UML_CONFIG_UML_TIME_TRAVEL_SUPPORT, CONFIG_UML_TIME_TRAVEL_SUPPORT);
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#endif
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/* for stub */
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DEFINE(UML_STUB_FIELD_OFFSET, offsetof(struct stub_data, offset));
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DEFINE(UML_STUB_FIELD_CHILD_ERR, offsetof(struct stub_data, child_err));
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DEFINE(UML_STUB_FIELD_FD, offsetof(struct stub_data, fd));
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