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x86_64: send more specific signals on exceptions

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This commit is contained in:
K. Lange 2024-02-08 16:46:57 +09:00
parent a0e5603e1c
commit 8ce8d8d397
1 changed files with 22 additions and 22 deletions
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44
kernel/arch/x86_64/idt.c
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@ -547,13 +547,13 @@ static void _local_timer(struct regs * r) {
* @param r Interrupt register context
* @param description Textual description of the exception, for panic messages.
*/
static void _exception(struct regs * r, const char * description) {
static void _exception(struct regs * r, const char * description, int signum) {
/* If we were in kernel space, this is a panic */
if (!this_core->current_process || r->cs == 0x08) {
panic(description, r, r->int_no);
}
/* Otherwise, these interrupts should trigger SIGILL */
send_signal(this_core->current_process->id, SIGILL, 1);
/* Otherwise, these interrupts should trigger a signal */
send_signal(this_core->current_process->id, signum, 1);
}
/**
@ -574,37 +574,37 @@ static void _handle_irq(struct regs * r, int irq) {
irq_ack(irq);
}
#define EXC(i,n) case i: _exception(r, n); break;
#define EXC(i,n,s) case i: _exception(r, n, s); break;
#define IRQ(i) case i: _handle_irq(r,i-32); break;
void isr_handler_inner(struct regs * r) {
switch (r->int_no) {
EXC(0,"divide-by-zero");
EXC(0,"divide-by-zero",SIGFPE);
case 1: _debug_int(r); return;
/* NMI doesn't reach here, we use it as a panic signal. */
EXC(3,"breakpoint"); /* TODO: This should map to a ptrace event */
EXC(4,"overflow");
EXC(5,"bound range exceeded");
EXC(6,"invalid opcode");
EXC(7,"device not available");
EXC(3,"breakpoint",SIGTRAP); /* TODO: This should map to a ptrace event */
EXC(4,"overflow",SIGFPE);
EXC(5,"bound range exceeded",SIGBUS);
EXC(6,"invalid opcode",SIGILL);
EXC(7,"device not available",SIGBUS);
case 8: _double_fault(r); break;
/* 9 is a legacy exception that shouldn't happen */
EXC(10,"invalid TSS");
EXC(11,"segment not present");
EXC(12,"stack-segment fault");
EXC(10,"invalid TSS",SIGBUS);
EXC(11,"segment not present",SIGBUS);
EXC(12,"stack-segment fault",SIGBUS);
case 13: _general_protection_fault(r); break;
case 14: _page_fault(r); break;
/* 15 is reserved */
EXC(16,"floating point exception");
EXC(17,"alignment check");
EXC(18,"machine check");
EXC(19,"SIMD floating-point exception");
EXC(20,"virtualization exception");
EXC(21,"control protection exception");
EXC(16,"floating point exception",SIGFPE);
EXC(17,"alignment check",SIGBUS);
EXC(18,"machine check",SIGBUS);
EXC(19,"SIMD floating-point exception",SIGFPE);
EXC(20,"virtualization exception",SIGBUS);
EXC(21,"control protection exception",SIGBUS);
/* 22 through 27 are reserved */
EXC(28,"hypervisor injection exception");
EXC(29,"VMM communication exception");
EXC(30,"security exception");
EXC(28,"hypervisor injection exception",SIGBUS);
EXC(29,"VMM communication exception",SIGBUS);
EXC(30,"security exception",SIGBUS);
/* 31 is reserved */
/* 16 IRQs that go to the general IRQ chain */