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Start working on memory-mapped files.

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First of all, change sys$mmap to take a struct SC_mmap_params since our
sycsall calling convention can't handle more than 3 arguments.

This exposed a bug in Syscall::invoke() needing to use clobber lists.
It was a bit confusing to debug. :^)
This commit is contained in:
Andreas Kling 2018-11-08 11:37:01 +01:00
parent 41a751c90c
commit fdbd9f1e27
14 changed files with 82 additions and 26 deletions
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4
Kernel/Syscall.cpp
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@ -8,7 +8,7 @@ extern "C" void syscall_entry(RegisterDump&);
extern "C" void syscall_ISR();
extern volatile RegisterDump* syscallRegDump;
asm(
asm volatile(
".globl syscall_ISR \n"
"syscall_ISR:\n"
" pusha\n"
@ -93,7 +93,7 @@ static DWORD handle(RegisterDump& regs, DWORD function, DWORD arg1, DWORD arg2,
case Syscall::SC_waitpid:
return current->sys$waitpid((pid_t)arg1, (int*)arg2, (int)arg3);
case Syscall::SC_mmap:
return (dword)current->sys$mmap((void*)arg1, (size_t)arg2);
return (dword)current->sys$mmap((const SC_mmap_params*)arg1);
case Syscall::SC_munmap:
return current->sys$munmap((void*)arg1, (size_t)arg2);
case Syscall::SC_gethostname: