- Rewrite the low-level trap/exception/system call code from the ground up:
- Do not corrupt the stack anymore
- Use a consistent trap frame layout (enable OldIrql and PreviousMode, and set the 0xBADB0D00 debug mark)
- Use slower but more correct trap prolog/epilog code for now.
- Generalize all prolog/epilog code into macros just like on x86. As a result, traps are now 6 lines of code.
- Rewrite the system call interface from the ground up:
- System calls didn't actually work: a debug print made the stack layout magical enough so that they didn't normally crush, but only slowly ate the stack.
- Copying arguments from caller to system call was, as the comment on the original code so aptly put it, "total shit".
- Due to ABI concerns, and to provide an actual template on how you're -supposed- to implement something like system calls on RISC processors, we now use
a model similar to BSD, but about ten times better (with that much less code too). We'll document it later on the RosPSG Wiki.
- This code probably contains some of the most vile-yet-elegant macro magic ever written for such low-level code as system call dispatching.
- The result of all this is that we're at the same place as before (RamdiskAddDevice needs to be implemented by the Ramdisk guys) but with a sane low-level
backend that isn't slowly eating away the stack, corrupting data, and basically working through random chance.
- Move timebase code from stubs.c to its own file, time.c.
- Silence multiple debug prints and fix a corrupted debug print in KiSystemStartup.
svn path=/trunk/; revision=34366
2008-07-08 09:11:44 +00:00
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/*
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* PROJECT: ReactOS Kernel
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: ntoskrnl/ke/arm/ke_i.h
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* PURPOSE: Implements macro-generated system call portable wrappers
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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//
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// First, cleanup after any previous invocation
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//
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2021-06-11 12:29:21 +00:00
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#undef _1
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#undef _2
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#undef _3
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#undef _4
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#undef _5
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#undef _6
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#undef _7
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#undef _8
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#undef _9
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#undef a
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#undef b
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#undef c
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#undef d
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- Rewrite the low-level trap/exception/system call code from the ground up:
- Do not corrupt the stack anymore
- Use a consistent trap frame layout (enable OldIrql and PreviousMode, and set the 0xBADB0D00 debug mark)
- Use slower but more correct trap prolog/epilog code for now.
- Generalize all prolog/epilog code into macros just like on x86. As a result, traps are now 6 lines of code.
- Rewrite the system call interface from the ground up:
- System calls didn't actually work: a debug print made the stack layout magical enough so that they didn't normally crush, but only slowly ate the stack.
- Copying arguments from caller to system call was, as the comment on the original code so aptly put it, "total shit".
- Due to ABI concerns, and to provide an actual template on how you're -supposed- to implement something like system calls on RISC processors, we now use
a model similar to BSD, but about ten times better (with that much less code too). We'll document it later on the RosPSG Wiki.
- This code probably contains some of the most vile-yet-elegant macro magic ever written for such low-level code as system call dispatching.
- The result of all this is that we're at the same place as before (RamdiskAddDevice needs to be implemented by the Ramdisk guys) but with a sane low-level
backend that isn't slowly eating away the stack, corrupting data, and basically working through random chance.
- Move timebase code from stubs.c to its own file, time.c.
- Silence multiple debug prints and fix a corrupted debug print in KiSystemStartup.
svn path=/trunk/; revision=34366
2008-07-08 09:11:44 +00:00
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#undef e
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#undef f
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#undef _10
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#undef _11
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#undef SYSCALL
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//
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// Are we building the typedef prototypes?
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//
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#ifdef PROTO
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//
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// Then, each parameter is actually a prototype argument
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//
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#define _1 PVOID
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#define _2 PVOID
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#define _3 PVOID
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#define _4 PVOID
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#define _5 PVOID
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#define _6 PVOID
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#define _7 PVOID
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#define _8 PVOID
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#define _9 PVOID
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#define a PVOID
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#define b PVOID
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#define c PVOID
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#define d PVOID
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#define e PVOID
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#define f PVOID
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#define _10 PVOID
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#define _11 PVOID
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//
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// And we generate the typedef
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//
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#define SYSCALL(x, y) typedef NTSTATUS (*PKI_SYSCALL_##x##PARAM)y;
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//
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// Cleanup for next run
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//
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#undef PROTO
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#else
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//
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// Each parameter is actually an argument for the system call
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//
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#define _1 g[0x00]
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#define _2 g[0x01]
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#define _3 g[0x02]
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#define _4 g[0x03]
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#define _5 g[0x04]
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#define _6 g[0x05]
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#define _7 g[0x06]
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#define _8 g[0x07]
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#define _9 g[0x08]
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#define a g[0x09]
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#define b g[0x0A]
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#define c g[0x0B]
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#define d g[0x0C]
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#define e g[0x0D]
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#define f g[0x0E]
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#define _10 g[0x0F]
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#define _11 g[0x10]
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//
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// And we generate the actual system call
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//
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#define SYSCALL(x, y) \
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NTSTATUS \
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KiSyscall##x##Param( \
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IN PVOID p, \
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IN PVOID *g \
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) \
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{ \
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return ((PKI_SYSCALL_##x##PARAM)p)y; \
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}
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//
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// Cleanup for next run
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//
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#undef FUNC
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#endif
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