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syscalls2 x64 and ARM64 do not support 32-bit syscalls #1525

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syscalls2 x64 and ARM64 do not support 32-bit syscalls#1525
@lacraig2

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@lacraig2
lacraig2
opened on Aug 20, 2024

This seems to have been a deliberate choice. I'd like to know if anyone has strong feelings about it.

If not, I'd propose we add support for it.

If people do care about it I think it'd be fine to add an argument to syscalls2 for one functionality or the other.

@LauraLMann it looks like git blame has you adding this so I want to make sure to get your input.

panda/panda/plugins/syscalls2/syscalls2.cpp

Lines 1044 to 1059 in 1b4c51b

else if (buf[0]== 0xCD && buf[1] == syscalls_profile->syscall_interrupt_number) {
#if defined(TARGET_X86_64)
LOG_WARNING("32-bit system call (int 0x80) found in 64-bit replay - ignoring\n");
return 0;
#else
return pc;
#endif
}
// Check if the instruction is sysenter (0F 34)
else if (buf[0]== 0x0F && buf[1] == 0x34) {
#if defined(TARGET_X86_64)
LOG_WARNING("32-bit sysenter found in 64-bit replay - ignoring\n");
return 0;
#else
return pc;
#endif

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