109 lines
2.9 KiB
ArmAsm
109 lines
2.9 KiB
ArmAsm
/* See COPYRIGHT for copyright information. */
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#include <inc/mmu.h>
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#include <inc/memlayout.h>
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#include <inc/trap.h>
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#include <kern/picirq.h>
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###################################################################
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# exceptions/interrupts
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###################################################################
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/* TRAPHANDLER defines a globally-visible function for handling a trap.
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* It pushes a trap number onto the stack, then jumps to _alltraps.
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* Use TRAPHANDLER for traps where the CPU automatically pushes an error code.
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*
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* You shouldn't call a TRAPHANDLER function from C, but you may
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* need to _declare_ one in C (for instance, to get a function pointer
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* during IDT setup). You can declare the function with
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* void NAME();
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* where NAME is the argument passed to TRAPHANDLER.
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*/
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#define TRAPHANDLER(name, num) \
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.globl name; /* define global symbol for 'name' */ \
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.type name, @function; /* symbol type is function */ \
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.align 2; /* align function definition */ \
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name: /* function starts here */ \
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pushl $(num); \
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jmp _alltraps
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/* Use TRAPHANDLER_NOEC for traps where the CPU doesn't push an error code.
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* It pushes a 0 in place of the error code, so the trap frame has the same
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* format in either case.
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*/
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#define TRAPHANDLER_NOEC(name, num) \
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.globl name; \
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.type name, @function; \
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.align 2; \
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name: \
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pushl $0; \
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pushl $(num); \
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jmp _alltraps
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.text
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.globl sysenter_handler
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sysenter_handler:
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push %ebp // holds env's stack pointer
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push %esi // holds the env's return addr
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push %edi
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push %ebx
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push %ecx
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push %edx
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push %eax
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call syscall
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add $0x14, %esp
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pop %edx
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pop %ecx
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sysexit
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/*
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* Lab 3: Your code here for generating entry points for the different traps.
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*/
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TRAPHANDLER_NOEC(t_divide, T_DIVIDE);
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TRAPHANDLER_NOEC(t_debug, T_DEBUG);
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TRAPHANDLER_NOEC(t_nmi, T_NMI);
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TRAPHANDLER_NOEC(t_brkpt, T_BRKPT);
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TRAPHANDLER_NOEC(t_oflow, T_OFLOW);
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TRAPHANDLER_NOEC(t_bound, T_OFLOW);
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TRAPHANDLER_NOEC(t_illop, T_OFLOW);
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TRAPHANDLER_NOEC(t_device, T_OFLOW);
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TRAPHANDLER(t_dblflt, T_OFLOW);
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TRAPHANDLER(t_tss, T_TSS);
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TRAPHANDLER(t_segnp, T_SEGNP);
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TRAPHANDLER(t_stack, T_STACK);
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TRAPHANDLER(t_gpflt, T_GPFLT);
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TRAPHANDLER(t_pgflt, T_PGFLT);
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TRAPHANDLER_NOEC(t_fperr, T_FPERR);
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TRAPHANDLER(t_align, T_ALIGN);
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TRAPHANDLER_NOEC(t_mchk, T_MCHK);
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TRAPHANDLER_NOEC(t_simderr, T_SIMDERR);
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TRAPHANDLER_NOEC(t_syscall, T_SYSCALL);
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TRAPHANDLER(t_default, T_DEFAULT);
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// HINT 1 : TRAPHANDLER_NOEC(t_divide, T_DIVIDE);
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// Do something like this if there is no error code for the trap
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// HINT 2 : TRAPHANDLER(t_dblflt, T_DBLFLT);
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// Do something like this if the trap includes an error code..
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// HINT 3 : READ Intel's manual to check if the trap includes an error code
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// or not...
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/*
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* Lab 3: Your code here for _alltraps
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*/
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.globl _alltraps
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_alltraps:
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sub $0x2, %esp
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pushw %ds
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sub $0x2, %esp
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pushw %es
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pushal
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mov $(GD_KD), %eax
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movw %ax, %ds
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movw %ax, %es
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pushl %esp
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call trap
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