2d72cbec41
. add cpufeature detection of both . use it for both ipc and kernelcall traps, using a register for call number . SYSENTER/SYSCALL does not save any context, therefore userland has to save it . to accomodate multiple kernel entry/exit types, the entry type is recorded in the process struct. hitherto all types were interrupt (soft int, exception, hard int); now SYSENTER/SYSCALL is new, with the difference that context is not fully restored from proc struct when running the process again. this can't be done as some information is missing. . complication: cases in which the kernel has to fully change process context (i.e. sigreturn). in that case the exit type is changed from SYSENTER/SYSEXIT to soft-int (i.e. iret) and context is fully restored from the proc struct. this does mean the PC and SP must change, as the sysenter/sysexit userland code will otherwise try to restore its own context. this is true in the sigreturn case. . override all usage by setting libc_ipc=1
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
#include "kernel.h"
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#include "arch_proto.h"
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struct minix_ipcvecs minix_ipcvecs_softint = {
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.send_ptr = usermapped_send_softint,
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.receive_ptr = usermapped_receive_softint,
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.sendrec_ptr = usermapped_sendrec_softint,
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.sendnb_ptr = usermapped_sendnb_softint,
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.notify_ptr = usermapped_notify_softint,
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.do_kernel_call_ptr = usermapped_do_kernel_call_softint,
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.senda_ptr = usermapped_senda_softint
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};
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struct minix_ipcvecs minix_ipcvecs_sysenter = {
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.send_ptr = usermapped_send_sysenter,
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.receive_ptr = usermapped_receive_sysenter,
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.sendrec_ptr = usermapped_sendrec_sysenter,
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.sendnb_ptr = usermapped_sendnb_sysenter,
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.notify_ptr = usermapped_notify_sysenter,
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.do_kernel_call_ptr = usermapped_do_kernel_call_sysenter,
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.senda_ptr = usermapped_senda_sysenter
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};
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struct minix_ipcvecs minix_ipcvecs_syscall = {
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.send_ptr = usermapped_send_syscall,
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.receive_ptr = usermapped_receive_syscall,
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.sendrec_ptr = usermapped_sendrec_syscall,
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.sendnb_ptr = usermapped_sendnb_syscall,
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.notify_ptr = usermapped_notify_syscall,
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.do_kernel_call_ptr = usermapped_do_kernel_call_syscall,
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.senda_ptr = usermapped_senda_syscall
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};
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