mirror of
https://github.com/clearlinux/graphene.git
synced 2026-09-03 12:21:37 +00:00
borysp
c24bddd5aa
Change log (most important only):
- unify CPU context structures - now we have only one version -
`PAL_CONTEXT` - which is shared between LibOS and PALs and it should
depend only on the host architecture (not OS),
- syscalls emulation changed:
- dedicated LibOS stack is now used for syscalls emulation,
- removed one indirection level in syscalls table - now it stores
`shim_do_*` functions directly,
- signal handling - completely rewritten:
- all signal queues use proper locking schemes now,
- signals are handled *only* when returning to the user app from LibOS
or PAL,
- nested signals are now possible,
- the app is allowed to jump out of signal handler with the same
sematics as on normal Linux,
- signal altstack is now fully supported,
- syscall restarting is now supported,
- doing a backtrace from the signal handler works properly,
- disallow injecting host-level signals, with one exception, see
`sys.enable_sigterm_injection` manifest option for more details.
35 lines
689 B
C
35 lines
689 B
C
#include <stdbool.h>
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#include "pal.h"
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#include "pal_debug.h"
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int count = 0;
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int i = 0;
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static void handler(bool is_in_pal, PAL_NUM arg, PAL_CONTEXT* context) {
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__UNUSED(is_in_pal);
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pal_printf("failure in the handler: 0x%08lx\n", arg);
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count++;
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if (count == 30)
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DkProcessExit(0);
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}
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int main(void) {
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pal_printf("Enter Main Thread\n");
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DkSetExceptionHandler(handler, PAL_EVENT_ARITHMETIC_ERROR);
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__asm__ volatile (
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"movq $1, %%rax\n"
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"cqo\n"
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"movq $0, %%rbx\n"
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"divq %%rbx\n"
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"nop\n"
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::: "rax", "rbx", "rdx", "cc");
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pal_printf("Leave Main Thread\n");
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return 0;
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}
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