> If it helps to fix small bugs
It looks tcc have some serious bugs related to the compiled kernel:
negative numbers of the freed memory, traps when booting.
One of the problem:
what size of the segment registers (%fs, %gs)
- asm volatile("mov %%fs,%0":"=m" (prev->fs));
- asm volatile("mov %%gs,%0":"=m" (prev->gs));
+ asm volatile("movw %%fs,%0":"=m" (prev->fs));
+ asm volatile("movw %%gs,%0":"=m" (prev->gs));
or
+ asm volatile("movl %%fs,%0":"=m" (prev->fs));
+ asm volatile("movl %%gs,%0":"=m" (prev->gs));
Related to the pp (or asm?):
SYMBOL_NAME_STR(IRQ) #nr "_interrupt:\n\t" \
- "pushl $"#nr"-256\n\t" \
+ "pushl $"#nr" - 256\n\t" \
A .rept asm macro must be implemented:
+#if 0
.rept NR_syscalls-(.-sys_call_table)/4
.long SYMBOL_NAME(sys_ni_syscall)
.endr
+#else
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
+ .long SYMBOL_NAME(sys_ni_syscall)
#endif
I don't shure that I can do this.
PS: I will try to mix gcc compiled *.o and tcc compiled *.o to find a
code which is miscompiled by tcc.
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