mirror of
https://github.com/golang/go
synced 2024-11-22 17:04:40 -07:00
more 386 runtime:
remove use of _subv in vlrt.c darwin/386/signal.c darwin/386/* linux/386/* (forgotten before) can run empty program on darwin/386 now. R=r DELTA=1140 (1021 added, 114 deleted, 5 changed) OCL=26942 CL=26968
This commit is contained in:
Russ Cox
parent
42546f4812
commit
4702c0e5ef
@ -43,6 +43,7 @@ struct Vlong
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{
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union
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{
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long long v;
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struct
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{
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ulong lo;
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@ -60,8 +61,6 @@ struct Vlong
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void abort(void);
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void _subv(Vlong*, Vlong, Vlong);
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void
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_d2v(Vlong *y, double d)
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{
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@ -236,7 +235,7 @@ dodiv(Vlong num, Vlong den, Vlong *qp, Vlong *rp)
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slowdodiv(num, den, &q, &r);
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else {
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q.lo = n;
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_subv(&r, num, x);
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r.v = num.v - x.v;
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}
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} else {
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if(num.hi >= den.lo){
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229
src/runtime/darwin/386/defs.h
Normal file
229
src/runtime/darwin/386/defs.h
Normal file
@ -0,0 +1,229 @@
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// godefs -f -m32 defs.c
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// MACHINE GENERATED - DO NOT EDIT.
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// Constants
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enum {
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PROT_NONE = 0,
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PROT_READ = 0x1,
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PROT_WRITE = 0x2,
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PROT_EXEC = 0x4,
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MAP_ANON = 0x1000,
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MAP_PRIVATE = 0x2,
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MACH_MSG_TYPE_MOVE_RECEIVE = 0x10,
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MACH_MSG_TYPE_MOVE_SEND = 0x11,
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MACH_MSG_TYPE_MOVE_SEND_ONCE = 0x12,
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MACH_MSG_TYPE_COPY_SEND = 0x13,
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MACH_MSG_TYPE_MAKE_SEND = 0x14,
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MACH_MSG_TYPE_MAKE_SEND_ONCE = 0x15,
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MACH_MSG_TYPE_COPY_RECEIVE = 0x16,
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MACH_MSG_PORT_DESCRIPTOR = 0,
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MACH_MSG_OOL_DESCRIPTOR = 0x1,
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MACH_MSG_OOL_PORTS_DESCRIPTOR = 0x2,
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MACH_MSG_OOL_VOLATILE_DESCRIPTOR = 0x3,
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MACH_MSGH_BITS_COMPLEX = 0x80000000,
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MACH_SEND_MSG = 0x1,
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MACH_RCV_MSG = 0x2,
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MACH_RCV_LARGE = 0x4,
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MACH_SEND_TIMEOUT = 0x10,
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MACH_SEND_INTERRUPT = 0x40,
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MACH_SEND_CANCEL = 0x80,
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MACH_SEND_ALWAYS = 0x10000,
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MACH_SEND_TRAILER = 0x20000,
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MACH_RCV_TIMEOUT = 0x100,
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MACH_RCV_NOTIFY = 0x200,
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MACH_RCV_INTERRUPT = 0x400,
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MACH_RCV_OVERWRITE = 0x1000,
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NDR_PROTOCOL_2_0 = 0,
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NDR_INT_BIG_ENDIAN = 0,
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NDR_INT_LITTLE_ENDIAN = 0x1,
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NDR_FLOAT_IEEE = 0,
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NDR_CHAR_ASCII = 0,
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SA_SIGINFO = 0x40,
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SA_RESTART = 0x2,
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SA_ONSTACK = 0x1,
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SA_USERTRAMP = 0x100,
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SA_64REGSET = 0x200,
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};
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// Types
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#pragma pack on
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typedef struct MachBody MachBody;
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struct MachBody {
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uint32 msgh_descriptor_count;
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};
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typedef struct MachHeader MachHeader;
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struct MachHeader {
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uint32 msgh_bits;
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uint32 msgh_size;
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uint32 msgh_remote_port;
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uint32 msgh_local_port;
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uint32 msgh_reserved;
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int32 msgh_id;
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};
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typedef struct MachNDR MachNDR;
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struct MachNDR {
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uint8 mig_vers;
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uint8 if_vers;
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uint8 reserved1;
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uint8 mig_encoding;
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uint8 int_rep;
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uint8 char_rep;
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uint8 float_rep;
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uint8 reserved2;
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};
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typedef struct MachPort MachPort;
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struct MachPort {
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uint32 name;
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uint32 pad1;
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uint16 pad2;
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uint8 disposition;
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uint8 type;
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};
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typedef struct StackT StackT;
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struct StackT {
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void *ss_sp;
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uint32 ss_size;
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int32 ss_flags;
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};
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typedef union Sighandler Sighandler;
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union Sighandler {
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void *__sa_handler;
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void *__sa_sigaction;
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};
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typedef struct Sigaction Sigaction;
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struct Sigaction {
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Sighandler __sigaction_u;
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void *sa_tramp;
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uint32 sa_mask;
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int32 sa_flags;
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};
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typedef union Sigval Sigval;
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union Sigval {
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int32 sival_int;
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void *sival_ptr;
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};
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typedef struct Siginfo Siginfo;
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struct Siginfo {
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int32 si_signo;
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int32 si_errno;
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int32 si_code;
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int32 si_pid;
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uint32 si_uid;
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int32 si_status;
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void *si_addr;
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Sigval si_value;
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int32 si_band;
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uint32 __pad[7];
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};
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typedef struct FPControl FPControl;
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struct FPControl {
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byte pad0[2];
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};
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typedef struct FPStatus FPStatus;
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struct FPStatus {
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byte pad0[2];
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};
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typedef struct RegMMST RegMMST;
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struct RegMMST {
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int8 mmst_reg[10];
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int8 mmst_rsrv[6];
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};
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typedef struct RegXMM RegXMM;
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struct RegXMM {
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int8 xmm_reg[16];
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};
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typedef struct Regs Regs;
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struct Regs {
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uint32 eax;
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uint32 ebx;
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uint32 ecx;
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uint32 edx;
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uint32 edi;
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uint32 esi;
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uint32 ebp;
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uint32 esp;
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uint32 ss;
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uint32 eflags;
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uint32 eip;
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uint32 cs;
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uint32 ds;
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uint32 es;
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uint32 fs;
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uint32 gs;
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};
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typedef struct FloatState FloatState;
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struct FloatState {
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int32 fpu_reserved[2];
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FPControl fpu_fcw;
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FPStatus fpu_fsw;
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uint8 fpu_ftw;
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uint8 fpu_rsrv1;
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uint16 fpu_fop;
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uint32 fpu_ip;
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uint16 fpu_cs;
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uint16 fpu_rsrv2;
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uint32 fpu_dp;
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uint16 fpu_ds;
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uint16 fpu_rsrv3;
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uint32 fpu_mxcsr;
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uint32 fpu_mxcsrmask;
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RegMMST fpu_stmm0;
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RegMMST fpu_stmm1;
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RegMMST fpu_stmm2;
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RegMMST fpu_stmm3;
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RegMMST fpu_stmm4;
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RegMMST fpu_stmm5;
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RegMMST fpu_stmm6;
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RegMMST fpu_stmm7;
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RegXMM fpu_xmm0;
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RegXMM fpu_xmm1;
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RegXMM fpu_xmm2;
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RegXMM fpu_xmm3;
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RegXMM fpu_xmm4;
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RegXMM fpu_xmm5;
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RegXMM fpu_xmm6;
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RegXMM fpu_xmm7;
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int8 fpu_rsrv4[224];
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int32 fpu_reserved1;
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};
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typedef struct ExceptionState ExceptionState;
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struct ExceptionState {
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uint32 trapno;
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uint32 err;
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uint32 faultvaddr;
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};
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typedef struct Mcontext Mcontext;
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struct Mcontext {
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ExceptionState es;
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Regs ss;
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FloatState fs;
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};
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typedef struct Ucontext Ucontext;
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struct Ucontext {
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int32 uc_onstack;
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uint32 uc_sigmask;
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StackT uc_stack;
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Ucontext *uc_link;
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uint32 uc_mcsize;
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Mcontext *uc_mcontext;
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};
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#pragma pack off
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8
src/runtime/darwin/386/rt0.s
Executable file
8
src/runtime/darwin/386/rt0.s
Executable file
@ -0,0 +1,8 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Darwin and Linux use the same linkage to main
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TEXT _rt0_386_darwin(SB),7,$0
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JMP _rt0_386(SB)
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103
src/runtime/darwin/386/signal.c
Normal file
103
src/runtime/darwin/386/signal.c
Normal file
@ -0,0 +1,103 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "defs.h"
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#include "os.h"
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#include "signals.h"
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void
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dumpregs(Regs *r)
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{
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printf("eax %x\n", r->eax);
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printf("ebx %x\n", r->ebx);
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printf("ecx %x\n", r->ecx);
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printf("edx %x\n", r->edx);
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printf("edi %x\n", r->edi);
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printf("esi %x\n", r->esi);
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printf("ebp %x\n", r->ebp);
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printf("esp %x\n", r->esp);
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printf("eip %x\n", r->eip);
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printf("eflags %x\n", r->eflags);
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printf("cs %x\n", r->cs);
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printf("fs %x\n", r->fs);
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printf("gs %x\n", r->gs);
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}
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void
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sighandler(int32 sig, Siginfo *info, void *context)
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{
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Ucontext *uc;
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Mcontext *mc;
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Regs *r;
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if(panicking) // traceback already printed
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sys_Exit(2);
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panicking = 1;
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if(sig < 0 || sig >= NSIG){
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printf("Signal %d\n", sig);
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}else{
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printf("%s\n", sigtab[sig].name);
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}
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uc = context;
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mc = uc->uc_mcontext;
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r = &mc->ss;
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printf("Faulting address: %p\n", info->si_addr);
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printf("pc: %x\n", r->eip);
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printf("\n");
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if(gotraceback()){
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traceback((void*)r->eip, (void*)r->esp, m->curg);
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tracebackothers(m->curg);
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dumpregs(r);
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}
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sys·Breakpoint();
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sys_Exit(2);
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}
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void
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sigignore(int32, Siginfo*, void*)
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{
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}
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void
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signalstack(byte *p, int32 n)
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{
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StackT st;
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st.ss_sp = p;
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st.ss_size = n;
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st.ss_flags = 0;
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sigaltstack(&st, nil);
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}
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void
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initsig(void)
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{
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int32 i;
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static Sigaction sa;
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sa.sa_flags |= SA_SIGINFO|SA_ONSTACK;
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sa.sa_mask = 0; // 0xFFFFFFFFU;
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sa.sa_tramp = sigtramp; // sigtramp's job is to call into real handler
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for(i = 0; i<NSIG; i++) {
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if(sigtab[i].flags) {
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if(sigtab[i].flags & SigCatch) {
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sa.__sigaction_u.__sa_sigaction = sighandler;
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} else {
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sa.__sigaction_u.__sa_sigaction = sigignore;
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}
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if(sigtab[i].flags & SigRestart)
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sa.sa_flags |= SA_RESTART;
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else
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sa.sa_flags &= ~SA_RESTART;
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sigaction(i, &sa, nil);
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}
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}
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}
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223
src/runtime/darwin/386/sys.s
Normal file
223
src/runtime/darwin/386/sys.s
Normal file
@ -0,0 +1,223 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// System calls and other sys.stuff for 386, Darwin
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// See http://fxr.watson.org/fxr/source/bsd/kern/syscalls.c?v=xnu-1228
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// or /usr/include/sys/syscall.h (on a Mac) for system call numbers.
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TEXT notok(SB),7,$0
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MOVL $0xf1, 0xf1
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RET
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// Exit the entire program (like C exit)
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TEXT sys·Exit(SB),7,$0
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MOVL $1, AX
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INT $0x80
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CALL notok(SB)
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RET
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// Exit this OS thread (like pthread_exit, which eventually
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// calls __bsdthread_terminate).
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TEXT exit1(SB),7,$0
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MOVL $361, AX
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INT $0x80
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JAE 2(PC)
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CALL notok(SB)
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RET
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|
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TEXT sys·write(SB),7,$0
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MOVL $4, AX
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INT $0x80
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JAE 2(PC)
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CALL notok(SB)
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RET
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|
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TEXT sys·mmap(SB),7,$0
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MOVL $197, AX
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INT $0x80
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JAE 2(PC)
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CALL notok(SB)
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RET
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|
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TEXT sigaction(SB),7,$0
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MOVL $46, AX
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INT $0x80
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JAE 2(PC)
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CALL notok(SB)
|
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RET
|
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|
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// Sigtramp's job is to call the actual signal handler.
|
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// It is called with the following arguments on the stack:
|
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// 0(FP) "return address" - ignored
|
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// 4(FP) actual handler
|
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// 8(FP) siginfo style - ignored
|
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// 12(FP) signal number
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// 16(FP) siginfo
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// 20(FP) context
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TEXT sigtramp(SB),7,$40
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MOVL 4(FS), BP // m
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MOVL 28(BP), BP // m->gsignal
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MOVL BP, 0(FS) // g = m->gsignal
|
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|
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MOVL handler+4(FP), DI
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MOVL signo+12(FP), AX
|
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MOVL siginfo+16(FP), BX
|
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MOVL context+20(FP), CX
|
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|
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MOVL AX, 0(SP)
|
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MOVL BX, 4(SP)
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MOVL CX, 8(SP)
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CALL DI
|
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|
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MOVL context+20(FP), CX
|
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MOVL style+8(FP), BX
|
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|
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MOVL $0, 0(SP) // "caller PC" - ignored
|
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MOVL CX, 4(SP)
|
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MOVL BX, 8(SP)
|
||||
MOVL $184, AX // sigreturn(ucontext, infostyle)
|
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INT $0x80
|
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CALL notok(SB)
|
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RET
|
||||
|
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TEXT sigaltstack(SB),7,$0
|
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MOVL $53, AX
|
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INT $0x80
|
||||
JAE 2(PC)
|
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CALL notok(SB)
|
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RET
|
||||
|
||||
TEXT bsdthread_create(SB),7,$0
|
||||
MOVL $360, AX
|
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INT $0x80
|
||||
JAE 2(PC)
|
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CALL notok(SB)
|
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RET
|
||||
|
||||
TEXT bsdthread_register(SB),7,$40
|
||||
MOVL $366, AX
|
||||
MOVL $bsdthread_start(SB), 0(SP) // threadstart
|
||||
MOVL $0, 4(SP) // wqthread, not used by us
|
||||
MOVL $0, 8(SP) // pthsize, not used by us
|
||||
MOVL $0, 12(SP) // paranoia
|
||||
MOVL $0, 16(SP)
|
||||
MOVL $0, 20(SP)
|
||||
INT $0x80
|
||||
JAE 2(PC)
|
||||
CALL notok(SB)
|
||||
RET
|
||||
|
||||
// Invoke Mach system call.
|
||||
// Assumes system call number in AX,
|
||||
// caller PC on stack, caller's caller PC next,
|
||||
// and then the system call arguments.
|
||||
//
|
||||
// Can be used for BSD too, but we don't,
|
||||
// because if you use this interface the BSD
|
||||
// system call numbers need an extra field
|
||||
// in the high 16 bits that seems to be the
|
||||
// argument count in bytes but is not always.
|
||||
// INT $0x80 works fine for those.
|
||||
TEXT sysenter(SB),7,$0
|
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POPL DX
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||||
MOVL SP, CX
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BYTE $0x0F; BYTE $0x34; // SYSENTER
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||||
// returns to DX with SP set to CX
|
||||
|
||||
TEXT mach_msg_trap(SB),7,$0
|
||||
MOVL $-31, AX
|
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CALL sysenter(SB)
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RET
|
||||
|
||||
TEXT mach_reply_port(SB),7,$0
|
||||
MOVL $-26, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
TEXT mach_task_self(SB),7,$0
|
||||
MOVL $-28, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
// Mach provides trap versions of the semaphore ops,
|
||||
// instead of requiring the use of RPC.
|
||||
|
||||
// uint32 mach_semaphore_wait(uint32)
|
||||
TEXT mach_semaphore_wait(SB),7,$0
|
||||
MOVL $-36, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
// uint32 mach_semaphore_timedwait(uint32, uint32, uint32)
|
||||
TEXT mach_semaphore_timedwait(SB),7,$0
|
||||
MOVL $-38, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
// uint32 mach_semaphore_signal(uint32)
|
||||
TEXT mach_semaphore_signal(SB),7,$0
|
||||
MOVL $-33, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
// uint32 mach_semaphore_signal_all(uint32)
|
||||
TEXT mach_semaphore_signal_all(SB),7,$0
|
||||
MOVL $-34, AX
|
||||
CALL sysenter(SB)
|
||||
RET
|
||||
|
||||
/*
|
||||
descriptor entry format for system call
|
||||
is the native machine format, ugly as it is:
|
||||
|
||||
2-byte limit
|
||||
3-byte base
|
||||
1-byte: 0x80=present, 0x60=dpl<<5, 0x1F=type
|
||||
1-byte: 0x80=limit is *4k, 0x40=32-bit operand size,
|
||||
0x0F=4 more bits of limit
|
||||
1 byte: 8 more bits of base
|
||||
|
||||
int i386_get_ldt(int, union ldt_entry *, int);
|
||||
int i386_set_ldt(int, const union ldt_entry *, int);
|
||||
|
||||
*/
|
||||
|
||||
// setldt(int entry, int address, int limit)
|
||||
TEXT setldt(SB),7,$32
|
||||
// set up data_desc
|
||||
LEAL 16(SP), AX // struct data_desc
|
||||
MOVL $0, 0(AX)
|
||||
MOVL $0, 4(AX)
|
||||
|
||||
MOVL address+4(FP), BX // aka base
|
||||
MOVW BX, 2(AX)
|
||||
SHRL $16, BX
|
||||
MOVB BX, 4(AX)
|
||||
SHRL $8, BX
|
||||
MOVB BX, 7(AX)
|
||||
|
||||
MOVL limit+8(FP), BX
|
||||
MOVW BX, 0(AX)
|
||||
SHRL $16, BX
|
||||
ANDL $0x0F, BX
|
||||
ORL $0x40, BX // 32-bit operand size
|
||||
MOVB BX, 6(AX)
|
||||
|
||||
MOVL $0xF2, 5(AX) // r/w data descriptor, dpl=3, present
|
||||
|
||||
// call i386_set_ldt(entry, desc, 1)
|
||||
MOVL entry+0(FP), BX
|
||||
MOVL BX, 0(SP)
|
||||
MOVL AX, 4(SP)
|
||||
MOVL $1, 8(SP)
|
||||
CALL i386_set_ldt(SB)
|
||||
RET
|
||||
|
||||
TEXT i386_set_ldt(SB),7,$0
|
||||
MOVL $5, AX
|
||||
INT $0x82 // sic
|
||||
JAE 2(PC)
|
||||
CALL notok(SB)
|
||||
RET
|
||||
|
||||
@ -169,11 +169,7 @@ minit(void)
|
||||
static void
|
||||
macherror(int32 r, int8 *fn)
|
||||
{
|
||||
prints("mach error ");
|
||||
prints(fn);
|
||||
prints(": ");
|
||||
sys·printint(r);
|
||||
prints("\n");
|
||||
printf("mach error %s: %d\n", fn, r);
|
||||
throw("mach error");
|
||||
}
|
||||
|
||||
|
||||
136
src/runtime/linux/386/defs.h
Executable file
136
src/runtime/linux/386/defs.h
Executable file
@ -0,0 +1,136 @@
|
||||
// godefs -f -m32 -f -I/home/rsc/pub/linux-2.6/arch/x86/include -f -I/home/rsc/pub/linux-2.6/include defs2.c
|
||||
|
||||
// MACHINE GENERATED - DO NOT EDIT.
|
||||
|
||||
// Constants
|
||||
enum {
|
||||
PROT_NONE = 0,
|
||||
PROT_READ = 0x1,
|
||||
PROT_WRITE = 0x2,
|
||||
PROT_EXEC = 0x4,
|
||||
MAP_ANON = 0x20,
|
||||
MAP_PRIVATE = 0x2,
|
||||
SA_RESTART = 0x10000000,
|
||||
SA_ONSTACK = 0x8000000,
|
||||
SA_RESTORER = 0x4000000,
|
||||
SA_SIGINFO = 0x4,
|
||||
};
|
||||
|
||||
// Types
|
||||
#pragma pack on
|
||||
|
||||
typedef struct Fpreg Fpreg;
|
||||
struct Fpreg {
|
||||
uint16 significand[4];
|
||||
uint16 exponent;
|
||||
};
|
||||
|
||||
typedef struct Fpxreg Fpxreg;
|
||||
struct Fpxreg {
|
||||
uint16 significand[4];
|
||||
uint16 exponent;
|
||||
uint16 padding[3];
|
||||
};
|
||||
|
||||
typedef struct Xmmreg Xmmreg;
|
||||
struct Xmmreg {
|
||||
uint32 element[4];
|
||||
};
|
||||
|
||||
typedef struct Fpstate Fpstate;
|
||||
struct Fpstate {
|
||||
uint32 cw;
|
||||
uint32 sw;
|
||||
uint32 tag;
|
||||
uint32 ipoff;
|
||||
uint32 cssel;
|
||||
uint32 dataoff;
|
||||
uint32 datasel;
|
||||
Fpreg _st[8];
|
||||
uint16 status;
|
||||
uint16 magic;
|
||||
uint32 _fxsr_env[6];
|
||||
uint32 mxcsr;
|
||||
uint32 reserved;
|
||||
Fpxreg _fxsr_st[8];
|
||||
Xmmreg _xmm[8];
|
||||
uint32 padding1[44];
|
||||
byte _anon_[48];
|
||||
};
|
||||
|
||||
typedef struct Timespec Timespec;
|
||||
struct Timespec {
|
||||
int32 tv_sec;
|
||||
int32 tv_nsec;
|
||||
};
|
||||
|
||||
typedef struct Timeval Timeval;
|
||||
struct Timeval {
|
||||
int32 tv_sec;
|
||||
int32 tv_usec;
|
||||
};
|
||||
|
||||
typedef struct Sigaction Sigaction;
|
||||
struct Sigaction {
|
||||
byte _u[4];
|
||||
uint32 sa_mask;
|
||||
uint32 sa_flags;
|
||||
void *sa_restorer;
|
||||
};
|
||||
|
||||
typedef struct Siginfo Siginfo;
|
||||
struct Siginfo {
|
||||
int32 si_signo;
|
||||
int32 si_errno;
|
||||
int32 si_code;
|
||||
byte _sifields[116];
|
||||
};
|
||||
|
||||
typedef struct Sigaltstack Sigaltstack;
|
||||
struct Sigaltstack {
|
||||
void *ss_sp;
|
||||
int32 ss_flags;
|
||||
uint32 ss_size;
|
||||
};
|
||||
|
||||
typedef struct Sigcontext Sigcontext;
|
||||
struct Sigcontext {
|
||||
uint16 gs;
|
||||
uint16 __gsh;
|
||||
uint16 fs;
|
||||
uint16 __fsh;
|
||||
uint16 es;
|
||||
uint16 __esh;
|
||||
uint16 ds;
|
||||
uint16 __dsh;
|
||||
uint32 edi;
|
||||
uint32 esi;
|
||||
uint32 ebp;
|
||||
uint32 esp;
|
||||
uint32 ebx;
|
||||
uint32 edx;
|
||||
uint32 ecx;
|
||||
uint32 eax;
|
||||
uint32 trapno;
|
||||
uint32 err;
|
||||
uint32 eip;
|
||||
uint16 cs;
|
||||
uint16 __csh;
|
||||
uint32 eflags;
|
||||
uint32 esp_at_signal;
|
||||
uint16 ss;
|
||||
uint16 __ssh;
|
||||
Fpstate *fpstate;
|
||||
uint32 oldmask;
|
||||
uint32 cr2;
|
||||
};
|
||||
|
||||
typedef struct Ucontext Ucontext;
|
||||
struct Ucontext {
|
||||
uint32 uc_flags;
|
||||
Ucontext *uc_link;
|
||||
Sigaltstack uc_stack;
|
||||
Sigcontext uc_mcontext;
|
||||
uint32 uc_sigmask;
|
||||
};
|
||||
#pragma pack off
|
||||
8
src/runtime/linux/386/rt0.s
Executable file
8
src/runtime/linux/386/rt0.s
Executable file
@ -0,0 +1,8 @@
|
||||
// Copyright 2009 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Darwin and Linux use the same linkage to main
|
||||
|
||||
TEXT _rt0_386_linux(SB),7,$0
|
||||
JMP _rt0_386(SB)
|
||||
222
src/runtime/linux/386/sys.s
Executable file
222
src/runtime/linux/386/sys.s
Executable file
@ -0,0 +1,222 @@
|
||||
// Copyright 2009 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
//
|
||||
// System calls and other sys.stuff for 386, Linux
|
||||
//
|
||||
|
||||
TEXT syscall(SB),7,$0
|
||||
MOVL 4(SP), AX // syscall number
|
||||
MOVL 8(SP), BX // arg1
|
||||
MOVL 12(SP), CX // arg2
|
||||
MOVL 16(SP), DX // arg3
|
||||
MOVL 20(SP), SI // arg4
|
||||
MOVL 24(SP), DI // arg5
|
||||
MOVL 28(SP), BP // arg6
|
||||
INT $0x80
|
||||
CMPL AX, $0xfffff001
|
||||
JLS 2(PC)
|
||||
INT $3 // not reached
|
||||
RET
|
||||
|
||||
TEXT sys·Exit(SB),7,$0
|
||||
MOVL $252, AX // syscall number
|
||||
MOVL 4(SP), BX
|
||||
INT $0x80
|
||||
INT $3 // not reached
|
||||
RET
|
||||
|
||||
TEXT exit1(SB),7,$0
|
||||
MOVL $1, AX // exit - exit the current os thread
|
||||
MOVL 4(SP), BX
|
||||
INT $0x80
|
||||
INT $3 // not reached
|
||||
RET
|
||||
|
||||
TEXT write(SB),7,$0
|
||||
MOVL $4, AX // syscall - write
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
MOVL 12(SP), DX
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
TEXT getpid(SB),7,$0
|
||||
MOVL $20, AX
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
TEXT kill(SB),7,$0
|
||||
MOVL $37, AX
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
TEXT sys·write(SB),7,$0
|
||||
MOVL $4, AX // syscall - write
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
MOVL 12(SP), DX
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
TEXT rt_sigaction(SB),7,$0
|
||||
MOVL $174, AX // syscall - rt_sigaction
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
MOVL 12(SP), DX
|
||||
MOVL 16(SP), SI
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
TEXT sigtramp(SB),7,$0
|
||||
MOVL 4(FS), BP // m
|
||||
MOVL 20(BP), AX // m->gsignal
|
||||
MOVL AX, 0(FS) // g = m->gsignal
|
||||
JMP sighandler(SB)
|
||||
|
||||
TEXT sigignore(SB),7,$0
|
||||
RET
|
||||
|
||||
TEXT sigreturn(SB),7,$0
|
||||
MOVL 4(FS), BP // m
|
||||
MOVL 32(BP), BP // m->curg
|
||||
MOVL BP, 0(FS) // g = m->curg
|
||||
MOVL $173, AX // rt_sigreturn
|
||||
INT $0x80
|
||||
INT $3 // not reached
|
||||
RET
|
||||
|
||||
TEXT sys·mmap(SB),7,$0
|
||||
MOVL $192, AX // mmap2
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
MOVL 12(SP), DX
|
||||
MOVL 16(SP), SI
|
||||
MOVL 20(SP), DI
|
||||
MOVL 24(SP), BP
|
||||
SHRL $12, BP
|
||||
INT $0x80
|
||||
CMPL AX, $0xfffff001
|
||||
JLS 2(PC)
|
||||
INT $3
|
||||
RET
|
||||
|
||||
// int64 futex(int32 *uaddr, int32 op, int32 val,
|
||||
// struct timespec *timeout, int32 *uaddr2, int32 val2);
|
||||
TEXT futex(SB),7,$0
|
||||
MOVL $240, AX // futex
|
||||
MOVL 4(SP), BX
|
||||
MOVL 8(SP), CX
|
||||
MOVL 12(SP), DX
|
||||
MOVL 16(SP), SI
|
||||
MOVL 20(SP), DI
|
||||
MOVL 24(SP), BP
|
||||
INT $0x80
|
||||
RET
|
||||
|
||||
// int64 clone(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
|
||||
TEXT clone(SB),7,$0
|
||||
MOVL $120, AX // clone
|
||||
MOVL flags+4(SP), BX
|
||||
MOVL stack+8(SP), CX
|
||||
|
||||
// Copy m, g, fn off parent stack for use by child.
|
||||
SUBL $12, CX
|
||||
MOVL m+12(SP), DX
|
||||
MOVL DX, 0(CX)
|
||||
MOVL g+16(SP), DX
|
||||
MOVL DX, 4(CX)
|
||||
MOVL fn+20(SP), DX
|
||||
MOVL DX, 8(CX)
|
||||
|
||||
MOVL $120, AX
|
||||
INT $0x80
|
||||
|
||||
// In parent, return.
|
||||
CMPL AX, $0
|
||||
JEQ 2(PC)
|
||||
RET
|
||||
|
||||
// In child, set up new stack, etc.
|
||||
MOVL 0(CX), BX // m
|
||||
MOVL 12(AX), AX // fs (= m->cret)
|
||||
MOVW AX, FS
|
||||
MOVL 8(CX), DX // fn
|
||||
ADDL $12, CX
|
||||
MOVL CX, SP
|
||||
|
||||
// fn is now on top of stack.
|
||||
|
||||
// initialize m->procid to Linux tid
|
||||
MOVL $224, AX
|
||||
INT $0x80
|
||||
MOVL AX, 20(BX)
|
||||
|
||||
// call fn
|
||||
CALL DX
|
||||
|
||||
// It shouldn't return; if it does, exit.
|
||||
MOVL $111, DI
|
||||
MOVL $1, AX
|
||||
INT $0x80
|
||||
JMP -3(PC) // keep exiting
|
||||
|
||||
TEXT sigaltstack(SB),7,$-8
|
||||
MOVL $186, AX // sigaltstack
|
||||
MOVL new+4(SP), BX
|
||||
MOVL old+8(SP), CX
|
||||
INT $0x80
|
||||
CMPL AX, $0xfffff001
|
||||
JLS 2(PC)
|
||||
INT $3
|
||||
RET
|
||||
|
||||
// // fake the per-goroutine and per-mach registers
|
||||
// LEAL m0(SB),
|
||||
|
||||
// TODO(rsc): move to linux.s
|
||||
// <asm-i386/ldt.h>
|
||||
// struct user_desc {
|
||||
// unsigned int entry_number;
|
||||
// unsigned long base_addr;
|
||||
// unsigned int limit;
|
||||
// unsigned int seg_32bit:1;
|
||||
// unsigned int contents:2;
|
||||
// unsigned int read_exec_only:1;
|
||||
// unsigned int limit_in_pages:1;
|
||||
// unsigned int seg_not_present:1;
|
||||
// unsigned int useable:1;
|
||||
// };
|
||||
#define SEG_32BIT 0x01
|
||||
// contents are the 2 bits 0x02 and 0x04.
|
||||
#define CONTENTS_DATA 0x00
|
||||
#define CONTENTS_STACK 0x02
|
||||
#define CONTENTS_CODE 0x04
|
||||
#define READ_EXEC_ONLY 0x08
|
||||
#define LIMIT_IN_PAGES 0x10
|
||||
#define SEG_NOT_PRESENT 0x20
|
||||
#define USEABLE 0x40
|
||||
|
||||
// setldt(int entry, int address, int limit)
|
||||
TEXT setldt(SB),7,$32
|
||||
// set up user_desc
|
||||
LEAL 16(SP), AX // struct user_desc
|
||||
MOVL entry+0(FP), BX // entry
|
||||
MOVL BX, 0(AX)
|
||||
MOVL address+4(FP), BX // base address
|
||||
MOVL BX, 4(AX)
|
||||
MOVL limit+8(FP), BX // limit
|
||||
MOVL BX, 8(AX)
|
||||
MOVL $(SEG_32BIT|USEABLE|CONTENTS_DATA), 12(AX) // flag bits
|
||||
|
||||
// call modify_ldt
|
||||
MOVL $123, 0(SP) // syscall - modify_ldt
|
||||
MOVL $1, 4(SP) // func = 1 (write)
|
||||
MOVL AX, 8(SP) // user_desc
|
||||
MOVL $16, 12(SP) // sizeof(user_desc)
|
||||
CALL syscall(SB)
|
||||
RET
|
||||
|
||||
@ -23,15 +23,18 @@ sys·panicl(int32 lno)
|
||||
{
|
||||
uint8 *sp;
|
||||
|
||||
prints("\npanic ");
|
||||
sys·printpc(&lno);
|
||||
prints("\n");
|
||||
if(panicking) {
|
||||
printf("double panic\n");
|
||||
sys_Exit(3);
|
||||
}
|
||||
panicking++;
|
||||
|
||||
printf("\npanic PC=%X [%d]\n", (uint64)(uintptr)&lno, panicking);
|
||||
sp = (uint8*)&lno;
|
||||
if(gotraceback()){
|
||||
traceback(sys·getcallerpc(&lno), sp, g);
|
||||
tracebackothers(g);
|
||||
}
|
||||
panicking = 1;
|
||||
sys·Breakpoint(); // so we can grab it in a debugger
|
||||
sys_Exit(2);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user