Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/v850/kernel/entry.S b/arch/v850/kernel/entry.S
new file mode 100644
index 0000000..895e27b
--- /dev/null
+++ b/arch/v850/kernel/entry.S
@@ -0,0 +1,1121 @@
+/*
+ * arch/v850/kernel/entry.S -- Low-level system-call handling, trap handlers,
+ * and context-switching
+ *
+ * Copyright (C) 2001,02,03 NEC Electronics Corporation
+ * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#include <linux/sys.h>
+
+#include <asm/entry.h>
+#include <asm/current.h>
+#include <asm/thread_info.h>
+#include <asm/clinkage.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/errno.h>
+
+#include <asm/asm-consts.h>
+
+
+/* Make a slightly more convenient alias for C_SYMBOL_NAME. */
+#define CSYM C_SYMBOL_NAME
+
+
+/* The offset of the struct pt_regs in a state-save-frame on the stack. */
+#define PTO STATE_SAVE_PT_OFFSET
+
+
+/* Save argument registers to the state-save-frame pointed to by EP. */
+#define SAVE_ARG_REGS \
+ sst.w r6, PTO+PT_GPR(6)[ep]; \
+ sst.w r7, PTO+PT_GPR(7)[ep]; \
+ sst.w r8, PTO+PT_GPR(8)[ep]; \
+ sst.w r9, PTO+PT_GPR(9)[ep]
+/* Restore argument registers from the state-save-frame pointed to by EP. */
+#define RESTORE_ARG_REGS \
+ sld.w PTO+PT_GPR(6)[ep], r6; \
+ sld.w PTO+PT_GPR(7)[ep], r7; \
+ sld.w PTO+PT_GPR(8)[ep], r8; \
+ sld.w PTO+PT_GPR(9)[ep], r9
+
+/* Save value return registers to the state-save-frame pointed to by EP. */
+#define SAVE_RVAL_REGS \
+ sst.w r10, PTO+PT_GPR(10)[ep]; \
+ sst.w r11, PTO+PT_GPR(11)[ep]
+/* Restore value return registers from the state-save-frame pointed to by EP. */
+#define RESTORE_RVAL_REGS \
+ sld.w PTO+PT_GPR(10)[ep], r10; \
+ sld.w PTO+PT_GPR(11)[ep], r11
+
+
+#define SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS \
+ sst.w r1, PTO+PT_GPR(1)[ep]; \
+ sst.w r5, PTO+PT_GPR(5)[ep]
+#define SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL \
+ sst.w r12, PTO+PT_GPR(12)[ep]; \
+ sst.w r13, PTO+PT_GPR(13)[ep]; \
+ sst.w r14, PTO+PT_GPR(14)[ep]; \
+ sst.w r15, PTO+PT_GPR(15)[ep]; \
+ sst.w r16, PTO+PT_GPR(16)[ep]; \
+ sst.w r17, PTO+PT_GPR(17)[ep]; \
+ sst.w r18, PTO+PT_GPR(18)[ep]; \
+ sst.w r19, PTO+PT_GPR(19)[ep]
+#define RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS \
+ sld.w PTO+PT_GPR(1)[ep], r1; \
+ sld.w PTO+PT_GPR(5)[ep], r5
+#define RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL \
+ sld.w PTO+PT_GPR(12)[ep], r12; \
+ sld.w PTO+PT_GPR(13)[ep], r13; \
+ sld.w PTO+PT_GPR(14)[ep], r14; \
+ sld.w PTO+PT_GPR(15)[ep], r15; \
+ sld.w PTO+PT_GPR(16)[ep], r16; \
+ sld.w PTO+PT_GPR(17)[ep], r17; \
+ sld.w PTO+PT_GPR(18)[ep], r18; \
+ sld.w PTO+PT_GPR(19)[ep], r19
+
+/* Save `call clobbered' registers to the state-save-frame pointed to by EP. */
+#define SAVE_CALL_CLOBBERED_REGS \
+ SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS; \
+ SAVE_ARG_REGS; \
+ SAVE_RVAL_REGS; \
+ SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL
+/* Restore `call clobbered' registers from the state-save-frame pointed to
+ by EP. */
+#define RESTORE_CALL_CLOBBERED_REGS \
+ RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS; \
+ RESTORE_ARG_REGS; \
+ RESTORE_RVAL_REGS; \
+ RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL
+
+/* Save `call clobbered' registers except for the return-value registers
+ to the state-save-frame pointed to by EP. */
+#define SAVE_CALL_CLOBBERED_REGS_NO_RVAL \
+ SAVE_CALL_CLOBBERED_REGS_BEFORE_ARGS; \
+ SAVE_ARG_REGS; \
+ SAVE_CALL_CLOBBERED_REGS_AFTER_RVAL
+/* Restore `call clobbered' registers except for the return-value registers
+ from the state-save-frame pointed to by EP. */
+#define RESTORE_CALL_CLOBBERED_REGS_NO_RVAL \
+ RESTORE_CALL_CLOBBERED_REGS_BEFORE_ARGS; \
+ RESTORE_ARG_REGS; \
+ RESTORE_CALL_CLOBBERED_REGS_AFTER_RVAL
+
+/* Save `call saved' registers to the state-save-frame pointed to by EP. */
+#define SAVE_CALL_SAVED_REGS \
+ sst.w r2, PTO+PT_GPR(2)[ep]; \
+ sst.w r20, PTO+PT_GPR(20)[ep]; \
+ sst.w r21, PTO+PT_GPR(21)[ep]; \
+ sst.w r22, PTO+PT_GPR(22)[ep]; \
+ sst.w r23, PTO+PT_GPR(23)[ep]; \
+ sst.w r24, PTO+PT_GPR(24)[ep]; \
+ sst.w r25, PTO+PT_GPR(25)[ep]; \
+ sst.w r26, PTO+PT_GPR(26)[ep]; \
+ sst.w r27, PTO+PT_GPR(27)[ep]; \
+ sst.w r28, PTO+PT_GPR(28)[ep]; \
+ sst.w r29, PTO+PT_GPR(29)[ep]
+/* Restore `call saved' registers from the state-save-frame pointed to by EP. */
+#define RESTORE_CALL_SAVED_REGS \
+ sld.w PTO+PT_GPR(2)[ep], r2; \
+ sld.w PTO+PT_GPR(20)[ep], r20; \
+ sld.w PTO+PT_GPR(21)[ep], r21; \
+ sld.w PTO+PT_GPR(22)[ep], r22; \
+ sld.w PTO+PT_GPR(23)[ep], r23; \
+ sld.w PTO+PT_GPR(24)[ep], r24; \
+ sld.w PTO+PT_GPR(25)[ep], r25; \
+ sld.w PTO+PT_GPR(26)[ep], r26; \
+ sld.w PTO+PT_GPR(27)[ep], r27; \
+ sld.w PTO+PT_GPR(28)[ep], r28; \
+ sld.w PTO+PT_GPR(29)[ep], r29
+
+
+/* Save the PC stored in the special register SAVEREG to the state-save-frame
+ pointed to by EP. r19 is clobbered. */
+#define SAVE_PC(savereg) \
+ stsr SR_ ## savereg, r19; \
+ sst.w r19, PTO+PT_PC[ep]
+/* Restore the PC from the state-save-frame pointed to by EP, to the special
+ register SAVEREG. LP is clobbered (it is used as a scratch register
+ because the POP_STATE macro restores it, and this macro is usually used
+ inside POP_STATE). */
+#define RESTORE_PC(savereg) \
+ sld.w PTO+PT_PC[ep], lp; \
+ ldsr lp, SR_ ## savereg
+/* Save the PSW register stored in the special register SAVREG to the
+ state-save-frame pointed to by EP. r19 is clobbered. */
+#define SAVE_PSW(savereg) \
+ stsr SR_ ## savereg, r19; \
+ sst.w r19, PTO+PT_PSW[ep]
+/* Restore the PSW register from the state-save-frame pointed to by EP, to
+ the special register SAVEREG. LP is clobbered (it is used as a scratch
+ register because the POP_STATE macro restores it, and this macro is
+ usually used inside POP_STATE). */
+#define RESTORE_PSW(savereg) \
+ sld.w PTO+PT_PSW[ep], lp; \
+ ldsr lp, SR_ ## savereg
+
+/* Save CTPC/CTPSW/CTBP registers to the state-save-frame pointed to by REG.
+ r19 is clobbered. */
+#define SAVE_CT_REGS \
+ stsr SR_CTPC, r19; \
+ sst.w r19, PTO+PT_CTPC[ep]; \
+ stsr SR_CTPSW, r19; \
+ sst.w r19, PTO+PT_CTPSW[ep]; \
+ stsr SR_CTBP, r19; \
+ sst.w r19, PTO+PT_CTBP[ep]
+/* Restore CTPC/CTPSW/CTBP registers from the state-save-frame pointed to by EP.
+ LP is clobbered (it is used as a scratch register because the POP_STATE
+ macro restores it, and this macro is usually used inside POP_STATE). */
+#define RESTORE_CT_REGS \
+ sld.w PTO+PT_CTPC[ep], lp; \
+ ldsr lp, SR_CTPC; \
+ sld.w PTO+PT_CTPSW[ep], lp; \
+ ldsr lp, SR_CTPSW; \
+ sld.w PTO+PT_CTBP[ep], lp; \
+ ldsr lp, SR_CTBP
+
+
+/* Push register state, except for the stack pointer, on the stack in the
+ form of a state-save-frame (plus some extra padding), in preparation for
+ a system call. This macro makes sure that the EP, GP, and LP
+ registers are saved, and TYPE identifies the set of extra registers to
+ be saved as well. Also copies (the new value of) SP to EP. */
+#define PUSH_STATE(type) \
+ addi -STATE_SAVE_SIZE, sp, sp; /* Make room on the stack. */ \
+ st.w ep, PTO+PT_GPR(GPR_EP)[sp]; \
+ mov sp, ep; \
+ sst.w gp, PTO+PT_GPR(GPR_GP)[ep]; \
+ sst.w lp, PTO+PT_GPR(GPR_LP)[ep]; \
+ type ## _STATE_SAVER
+/* Pop a register state pushed by PUSH_STATE, except for the stack pointer,
+ from the the stack. */
+#define POP_STATE(type) \
+ mov sp, ep; \
+ type ## _STATE_RESTORER; \
+ sld.w PTO+PT_GPR(GPR_GP)[ep], gp; \
+ sld.w PTO+PT_GPR(GPR_LP)[ep], lp; \
+ sld.w PTO+PT_GPR(GPR_EP)[ep], ep; \
+ addi STATE_SAVE_SIZE, sp, sp /* Clean up our stack space. */
+
+
+/* Switch to the kernel stack if necessary, and push register state on the
+ stack in the form of a state-save-frame. Also load the current task
+ pointer if switching from user mode. The stack-pointer (r3) should have
+ already been saved to the memory location SP_SAVE_LOC (the reason for
+ this is that the interrupt vectors may be beyond a 22-bit signed offset
+ jump from the actual interrupt handler, and this allows them to save the
+ stack-pointer and use that register to do an indirect jump). This macro
+ makes sure that `special' registers, system registers, and the stack
+ pointer are saved; TYPE identifies the set of extra registers to be
+ saved as well. SYSCALL_NUM is the register in which the system-call
+ number this state is for is stored (r0 if this isn't a system call).
+ Interrupts should already be disabled when calling this. */
+#define SAVE_STATE(type, syscall_num, sp_save_loc) \
+ tst1 0, KM; /* See if already in kernel mode. */ \
+ bz 1f; \
+ ld.w sp_save_loc, sp; /* ... yes, use saved SP. */ \
+ br 2f; \
+1: ld.w KSP, sp; /* ... no, switch to kernel stack. */ \
+2: PUSH_STATE(type); \
+ ld.b KM, r19; /* Remember old kernel-mode. */ \
+ sst.w r19, PTO+PT_KERNEL_MODE[ep]; \
+ ld.w sp_save_loc, r19; /* Remember old SP. */ \
+ sst.w r19, PTO+PT_GPR(GPR_SP)[ep]; \
+ mov 1, r19; /* Now definitely in kernel-mode. */ \
+ st.b r19, KM; \
+ GET_CURRENT_TASK(CURRENT_TASK); /* Fetch the current task pointer. */ \
+ /* Save away the syscall number. */ \
+ sst.w syscall_num, PTO+PT_CUR_SYSCALL[ep]
+
+
+/* Save register state not normally saved by PUSH_STATE for TYPE, to the
+ state-save-frame on the stack; also copies SP to EP. r19 may be trashed. */
+#define SAVE_EXTRA_STATE(type) \
+ mov sp, ep; \
+ type ## _EXTRA_STATE_SAVER
+/* Restore register state not normally restored by POP_STATE for TYPE,
+ from the state-save-frame on the stack; also copies SP to EP.
+ r19 may be trashed. */
+#define RESTORE_EXTRA_STATE(type) \
+ mov sp, ep; \
+ type ## _EXTRA_STATE_RESTORER
+
+/* Save any call-clobbered registers not normally saved by PUSH_STATE for
+ TYPE, to the state-save-frame on the stack.
+ EP may be trashed, but is not guaranteed to contain a copy of SP
+ (unlike after most SAVE_... macros). r19 may be trashed. */
+#define SAVE_EXTRA_STATE_FOR_SCHEDULE(type) \
+ type ## _SCHEDULE_EXTRA_STATE_SAVER
+/* Restore any call-clobbered registers not normally restored by
+ POP_STATE for TYPE, to the state-save-frame on the stack.
+ EP may be trashed, but is not guaranteed to contain a copy of SP
+ (unlike after most RESTORE_... macros). r19 may be trashed. */
+#define RESTORE_EXTRA_STATE_FOR_SCHEDULE(type) \
+ type ## _SCHEDULE_EXTRA_STATE_RESTORER
+
+
+/* These are extra_state_saver/restorer values for a user trap. Note
+ that we save the argument registers so that restarted syscalls will
+ function properly (otherwise it wouldn't be necessary), and we must
+ _not_ restore the return-value registers (so that traps can return a
+ value!), but call-clobbered registers are not saved at all, as the
+ caller of the syscall function should have saved them. */
+
+#define TRAP_RET reti
+/* Traps don't save call-clobbered registers (but do still save arg regs).
+ We preserve PSw to keep long-term state, namely interrupt status (for traps
+ from kernel-mode), and the single-step flag (for user traps). */
+#define TRAP_STATE_SAVER \
+ SAVE_ARG_REGS; \
+ SAVE_PC(EIPC); \
+ SAVE_PSW(EIPSW)
+/* When traps return, they just leave call-clobbered registers (except for arg
+ regs) with whatever value they have from the kernel. Traps don't preserve
+ the PSW, but we zero EIPSW to ensure it doesn't contain anything dangerous
+ (in particular, the single-step flag). */
+#define TRAP_STATE_RESTORER \
+ RESTORE_ARG_REGS; \
+ RESTORE_PC(EIPC); \
+ RESTORE_PSW(EIPSW)
+/* Save registers not normally saved by traps. We need to save r12, even
+ though it's nominally call-clobbered, because it's used when restarting
+ a system call (the signal-handling path uses SAVE_EXTRA_STATE, and
+ expects r12 to be restored when the trap returns). */
+#define TRAP_EXTRA_STATE_SAVER \
+ SAVE_RVAL_REGS; \
+ sst.w r12, PTO+PT_GPR(12)[ep]; \
+ SAVE_CALL_SAVED_REGS; \
+ SAVE_CT_REGS
+#define TRAP_EXTRA_STATE_RESTORER \
+ RESTORE_RVAL_REGS; \
+ sld.w PTO+PT_GPR(12)[ep], r12; \
+ RESTORE_CALL_SAVED_REGS; \
+ RESTORE_CT_REGS
+/* Save registers prior to calling scheduler (just before trap returns).
+ We have to save the return-value registers to preserve the trap's return
+ value. Note that ..._SCHEDULE_EXTRA_STATE_SAVER, unlike most ..._SAVER
+ macros, is required to setup EP itself if EP is needed (this is because
+ in many cases, the macro is empty). */
+#define TRAP_SCHEDULE_EXTRA_STATE_SAVER \
+ mov sp, ep; \
+ SAVE_RVAL_REGS
+/* Note that ..._SCHEDULE_EXTRA_STATE_RESTORER, unlike most ..._RESTORER
+ macros, is required to setup EP itself if EP is needed (this is because
+ in many cases, the macro is empty). */
+#define TRAP_SCHEDULE_EXTRA_STATE_RESTORER \
+ mov sp, ep; \
+ RESTORE_RVAL_REGS
+
+/* Register saving/restoring for maskable interrupts. */
+#define IRQ_RET reti
+#define IRQ_STATE_SAVER \
+ SAVE_CALL_CLOBBERED_REGS; \
+ SAVE_PC(EIPC); \
+ SAVE_PSW(EIPSW)
+#define IRQ_STATE_RESTORER \
+ RESTORE_CALL_CLOBBERED_REGS; \
+ RESTORE_PC(EIPC); \
+ RESTORE_PSW(EIPSW)
+#define IRQ_EXTRA_STATE_SAVER \
+ SAVE_CALL_SAVED_REGS; \
+ SAVE_CT_REGS
+#define IRQ_EXTRA_STATE_RESTORER \
+ RESTORE_CALL_SAVED_REGS; \
+ RESTORE_CT_REGS
+#define IRQ_SCHEDULE_EXTRA_STATE_SAVER /* nothing */
+#define IRQ_SCHEDULE_EXTRA_STATE_RESTORER /* nothing */
+
+/* Register saving/restoring for non-maskable interrupts. */
+#define NMI_RET reti
+#define NMI_STATE_SAVER \
+ SAVE_CALL_CLOBBERED_REGS; \
+ SAVE_PC(FEPC); \
+ SAVE_PSW(FEPSW);
+#define NMI_STATE_RESTORER \
+ RESTORE_CALL_CLOBBERED_REGS; \
+ RESTORE_PC(FEPC); \
+ RESTORE_PSW(FEPSW);
+#define NMI_EXTRA_STATE_SAVER \
+ SAVE_CALL_SAVED_REGS; \
+ SAVE_CT_REGS
+#define NMI_EXTRA_STATE_RESTORER \
+ RESTORE_CALL_SAVED_REGS; \
+ RESTORE_CT_REGS
+#define NMI_SCHEDULE_EXTRA_STATE_SAVER /* nothing */
+#define NMI_SCHEDULE_EXTRA_STATE_RESTORER /* nothing */
+
+/* Register saving/restoring for debug traps. */
+#define DBTRAP_RET .long 0x014607E0 /* `dbret', but gas doesn't support it. */
+#define DBTRAP_STATE_SAVER \
+ SAVE_CALL_CLOBBERED_REGS; \
+ SAVE_PC(DBPC); \
+ SAVE_PSW(DBPSW)
+#define DBTRAP_STATE_RESTORER \
+ RESTORE_CALL_CLOBBERED_REGS; \
+ RESTORE_PC(DBPC); \
+ RESTORE_PSW(DBPSW)
+#define DBTRAP_EXTRA_STATE_SAVER \
+ SAVE_CALL_SAVED_REGS; \
+ SAVE_CT_REGS
+#define DBTRAP_EXTRA_STATE_RESTORER \
+ RESTORE_CALL_SAVED_REGS; \
+ RESTORE_CT_REGS
+#define DBTRAP_SCHEDULE_EXTRA_STATE_SAVER /* nothing */
+#define DBTRAP_SCHEDULE_EXTRA_STATE_RESTORER /* nothing */
+
+/* Register saving/restoring for a context switch. We don't need to save
+ too many registers, because context-switching looks like a function call
+ (via the function `switch_thread'), so callers will save any
+ call-clobbered registers themselves. We do need to save the CT regs, as
+ they're normally not saved during kernel entry (the kernel doesn't use
+ them). We save PSW so that interrupt-status state will correctly follow
+ each thread (mostly NMI vs. normal-IRQ/trap), though for the most part
+ it doesn't matter since threads are always in almost exactly the same
+ processor state during a context switch. The stack pointer and return
+ value are handled by switch_thread itself. */
+#define SWITCH_STATE_SAVER \
+ SAVE_CALL_SAVED_REGS; \
+ SAVE_PSW(PSW); \
+ SAVE_CT_REGS
+#define SWITCH_STATE_RESTORER \
+ RESTORE_CALL_SAVED_REGS; \
+ RESTORE_PSW(PSW); \
+ RESTORE_CT_REGS
+
+
+/* Restore register state from the state-save-frame on the stack, switch back
+ to the user stack if necessary, and return from the trap/interrupt.
+ EXTRA_STATE_RESTORER is a sequence of assembly language statements to
+ restore anything not restored by this macro. Only registers not saved by
+ the C compiler are restored (that is, R3(sp), R4(gp), R31(lp), and
+ anything restored by EXTRA_STATE_RESTORER). */
+#define RETURN(type) \
+ ld.b PTO+PT_KERNEL_MODE[sp], r19; \
+ di; /* Disable interrupts */ \
+ cmp r19, r0; /* See if returning to kernel mode, */\
+ bne 2f; /* ... if so, skip resched &c. */ \
+ \
+ /* We're returning to user mode, so check for various conditions that \
+ trigger rescheduling. */ \
+ GET_CURRENT_THREAD(r18); \
+ ld.w TI_FLAGS[r18], r19; \
+ andi _TIF_NEED_RESCHED, r19, r0; \
+ bnz 3f; /* Call the scheduler. */ \
+5: andi _TIF_SIGPENDING, r19, r18; \
+ ld.w TASK_PTRACE[CURRENT_TASK], r19; /* ptrace flags */ \
+ or r18, r19; /* see if either is non-zero */ \
+ bnz 4f; /* if so, handle them */ \
+ \
+/* Return to user state. */ \
+1: st.b r0, KM; /* Now officially in user state. */ \
+ \
+/* Final return. The stack-pointer fiddling is not needed when returning \
+ to kernel-mode, but they don't hurt, and this way we can share the \
+ (sometimes rather lengthy) POP_STATE macro. */ \
+2: POP_STATE(type); \
+ st.w sp, KSP; /* Save the kernel stack pointer. */ \
+ ld.w PT_GPR(GPR_SP)-PT_SIZE[sp], sp; /* Restore stack pointer. */ \
+ type ## _RET; /* Return from the trap/interrupt. */ \
+ \
+/* Call the scheduler before returning from a syscall/trap. */ \
+3: SAVE_EXTRA_STATE_FOR_SCHEDULE(type); /* Prepare to call scheduler. */ \
+ jarl call_scheduler, lp; /* Call scheduler */ \
+ di; /* The scheduler enables interrupts */\
+ RESTORE_EXTRA_STATE_FOR_SCHEDULE(type); \
+ GET_CURRENT_THREAD(r18); \
+ ld.w TI_FLAGS[r18], r19; \
+ br 5b; /* Continue with return path. */ \
+ \
+/* Handle a signal or ptraced process return. \
+ r18 should be non-zero if there are pending signals. */ \
+4: /* Not all registers are saved by the normal trap/interrupt entry \
+ points (for instance, call-saved registers (because the normal \
+ C-compiler calling sequence in the kernel makes sure they're \
+ preserved), and call-clobbered registers in the case of \
+ traps), but signal handlers may want to examine or change the \
+ complete register state. Here we save anything not saved by \
+ the normal entry sequence, so that it may be safely restored \
+ (in a possibly modified form) after do_signal returns. */ \
+ SAVE_EXTRA_STATE(type); /* Save state not saved by entry. */ \
+ jarl handle_signal_or_ptrace_return, lp; \
+ RESTORE_EXTRA_STATE(type); /* Restore extra regs. */ \
+ br 1b
+
+
+/* Jump to the appropriate function for the system call number in r12
+ (r12 is not preserved), or return an error if r12 is not valid. The
+ LP register should point to the location where the called function
+ should return. [note that MAKE_SYS_CALL uses label 1] */
+#define MAKE_SYS_CALL \
+ /* Figure out which function to use for this system call. */ \
+ shl 2, r12; \
+ /* See if the system call number is valid. */ \
+ addi lo(CSYM(sys_call_table) - sys_call_table_end), r12, r0; \
+ bnh 1f; \
+ mov hilo(CSYM(sys_call_table)), r19; \
+ add r19, r12; \
+ ld.w 0[r12], r12; \
+ /* Make the system call. */ \
+ jmp [r12]; \
+ /* The syscall number is invalid, return an error. */ \
+1: addi -ENOSYS, r0, r10; \
+ jmp [lp]
+
+
+ .text
+
+/*
+ * User trap.
+ *
+ * Trap 0 system calls are also handled here.
+ *
+ * The stack-pointer (r3) should have already been saved to the memory
+ * location ENTRY_SP (the reason for this is that the interrupt vectors may be
+ * beyond a 22-bit signed offset jump from the actual interrupt handler, and
+ * this allows them to save the stack-pointer and use that register to do an
+ * indirect jump).
+ *
+ * Syscall protocol:
+ * Syscall number in r12, args in r6-r9
+ * Return value in r10
+ */
+G_ENTRY(trap):
+ SAVE_STATE (TRAP, r12, ENTRY_SP) // Save registers.
+ stsr SR_ECR, r19 // Find out which trap it was.
+ ei // Enable interrupts.
+ mov hilo(ret_from_trap), lp // where the trap should return
+
+ // The following two shifts (1) clear out extraneous NMI data in the
+ // upper 16-bits, (2) convert the 0x40 - 0x5f range of trap ECR
+ // numbers into the (0-31) << 2 range we want, (3) set the flags.
+ shl 27, r19 // chop off all high bits
+ shr 25, r19 // scale back down and then << 2
+ bnz 2f // See if not trap 0.
+
+ // Trap 0 is a `short' system call, skip general trap table.
+ MAKE_SYS_CALL // Jump to the syscall function.
+
+2: // For other traps, use a table lookup.
+ mov hilo(CSYM(trap_table)), r18
+ add r19, r18
+ ld.w 0[r18], r18
+ jmp [r18] // Jump to the trap handler.
+END(trap)
+
+/* This is just like ret_from_trap, but first restores extra registers
+ saved by some wrappers. */
+L_ENTRY(restore_extra_regs_and_ret_from_trap):
+ RESTORE_EXTRA_STATE(TRAP)
+ // fall through
+END(restore_extra_regs_and_ret_from_trap)
+
+/* Entry point used to return from a syscall/trap. */
+L_ENTRY(ret_from_trap):
+ RETURN(TRAP)
+END(ret_from_trap)
+
+
+/* This the initial entry point for a new child thread, with an appropriate
+ stack in place that makes it look the the child is in the middle of an
+ syscall. This function is actually `returned to' from switch_thread
+ (copy_thread makes ret_from_fork the return address in each new thread's
+ saved context). */
+C_ENTRY(ret_from_fork):
+ mov r10, r6 // switch_thread returns the prev task.
+ jarl CSYM(schedule_tail), lp // ...which is schedule_tail's arg
+ mov r0, r10 // Child's fork call should return 0.
+ br ret_from_trap // Do normal trap return.
+C_END(ret_from_fork)
+
+
+/*
+ * Trap 1: `long' system calls
+ * `Long' syscall protocol:
+ * Syscall number in r12, args in r6-r9, r13-r14
+ * Return value in r10
+ */
+L_ENTRY(syscall_long):
+ // Push extra arguments on the stack. Note that by default, the trap
+ // handler reserves enough stack space for 6 arguments, so we don't
+ // have to make any additional room.
+ st.w r13, 16[sp] // arg 5
+ st.w r14, 20[sp] // arg 6
+
+ // Make sure r13 and r14 are preserved, in case we have to restart a
+ // system call because of a signal (ep has already been set by caller).
+ st.w r13, PTO+PT_GPR(13)[sp]
+ st.w r14, PTO+PT_GPR(13)[sp]
+ mov hilo(ret_from_long_syscall), lp
+
+ MAKE_SYS_CALL // Jump to the syscall function.
+END(syscall_long)
+
+/* Entry point used to return from a long syscall. Only needed to restore
+ r13/r14 if the general trap mechanism doesnt' do so. */
+L_ENTRY(ret_from_long_syscall):
+ ld.w PTO+PT_GPR(13)[sp], r13 // Restore the extra registers
+ ld.w PTO+PT_GPR(13)[sp], r14
+ br ret_from_trap // The rest is the same as other traps
+END(ret_from_long_syscall)
+
+
+/* These syscalls need access to the struct pt_regs on the stack, so we
+ implement them in assembly (they're basically all wrappers anyway). */
+
+L_ENTRY(sys_fork_wrapper):
+#ifdef CONFIG_MMU
+ addi SIGCHLD, r0, r6 // Arg 0: flags
+ ld.w PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
+ movea PTO, sp, r8 // Arg 2: parent context
+ mov r0, r9 // Arg 3/4/5: 0
+ st.w r0, 16[sp]
+ st.w r0, 20[sp]
+ mov hilo(CSYM(do_fork)), r18 // Where the real work gets done
+ br save_extra_state_tramp // Save state and go there
+#else
+ // fork almost works, enough to trick you into looking elsewhere :-(
+ addi -EINVAL, r0, r10
+ jmp [lp]
+#endif
+END(sys_fork_wrapper)
+
+L_ENTRY(sys_vfork_wrapper):
+ addi CLONE_VFORK | CLONE_VM | SIGCHLD, r0, r6 // Arg 0: flags
+ ld.w PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
+ movea PTO, sp, r8 // Arg 2: parent context
+ mov r0, r9 // Arg 3/4/5: 0
+ st.w r0, 16[sp]
+ st.w r0, 20[sp]
+ mov hilo(CSYM(do_fork)), r18 // Where the real work gets done
+ br save_extra_state_tramp // Save state and go there
+END(sys_vfork_wrapper)
+
+L_ENTRY(sys_clone_wrapper):
+ ld.w PTO+PT_GPR(GPR_SP)[sp], r19// parent's stack pointer
+ cmp r7, r0 // See if child SP arg (arg 1) is 0.
+ cmov z, r19, r7, r7 // ... and use the parent's if so.
+ movea PTO, sp, r8 // Arg 2: parent context
+ mov r0, r9 // Arg 3/4/5: 0
+ st.w r0, 16[sp]
+ st.w r0, 20[sp]
+ mov hilo(CSYM(do_fork)), r18 // Where the real work gets done
+ br save_extra_state_tramp // Save state and go there
+END(sys_clone_wrapper)
+
+
+L_ENTRY(sys_execve_wrapper):
+ movea PTO, sp, r9 // add user context as 4th arg
+ jr CSYM(sys_execve) // Do real work (tail-call).
+END(sys_execve_wrapper)
+
+
+L_ENTRY(sys_sigsuspend_wrapper):
+ movea PTO, sp, r7 // add user context as 2nd arg
+ mov hilo(CSYM(sys_sigsuspend)), r18 // syscall function
+ jarl save_extra_state_tramp, lp // Save state and do it
+ br restore_extra_regs_and_ret_from_trap
+END(sys_sigsuspend_wrapper)
+L_ENTRY(sys_rt_sigsuspend_wrapper):
+ movea PTO, sp, r8 // add user context as 3rd arg
+ mov hilo(CSYM(sys_rt_sigsuspend)), r18 // syscall function
+ jarl save_extra_state_tramp, lp // Save state and do it
+ br restore_extra_regs_and_ret_from_trap
+END(sys_rt_sigsuspend_wrapper)
+
+L_ENTRY(sys_sigreturn_wrapper):
+ movea PTO, sp, r6 // add user context as 1st arg
+ mov hilo(CSYM(sys_sigreturn)), r18 // syscall function
+ jarl save_extra_state_tramp, lp // Save state and do it
+ br restore_extra_regs_and_ret_from_trap
+END(sys_sigreturn_wrapper)
+L_ENTRY(sys_rt_sigreturn_wrapper):
+ movea PTO, sp, r6 // add user context as 1st arg
+ mov hilo(CSYM(sys_rt_sigreturn)), r18// syscall function
+ jarl save_extra_state_tramp, lp // Save state and do it
+ br restore_extra_regs_and_ret_from_trap
+END(sys_rt_sigreturn_wrapper)
+
+
+/* Save any state not saved by SAVE_STATE(TRAP), and jump to r18.
+ It's main purpose is to share the rather lengthy code sequence that
+ SAVE_STATE expands into among the above wrapper functions. */
+L_ENTRY(save_extra_state_tramp):
+ SAVE_EXTRA_STATE(TRAP) // Save state not saved by entry.
+ jmp [r18] // Do the work the caller wants
+END(save_extra_state_tramp)
+
+
+/*
+ * Hardware maskable interrupts.
+ *
+ * The stack-pointer (r3) should have already been saved to the memory
+ * location ENTRY_SP (the reason for this is that the interrupt vectors may be
+ * beyond a 22-bit signed offset jump from the actual interrupt handler, and
+ * this allows them to save the stack-pointer and use that register to do an
+ * indirect jump).
+ */
+G_ENTRY(irq):
+ SAVE_STATE (IRQ, r0, ENTRY_SP) // Save registers.
+
+ stsr SR_ECR, r6 // Find out which interrupt it was.
+ movea PTO, sp, r7 // User regs are arg2
+
+ // All v850 implementations I know about encode their interrupts as
+ // multiples of 0x10, starting at 0x80 (after NMIs and software
+ // interrupts). Convert this number into a simple IRQ index for the
+ // rest of the kernel. We also clear the upper 16 bits, which hold
+ // NMI info, and don't appear to be cleared when a NMI returns.
+ shl 16, r6 // clear upper 16 bits
+ shr 20, r6 // shift back, and remove lower nibble
+ add -8, r6 // remove bias for irqs
+
+ // Call the high-level interrupt handling code.
+ jarl CSYM(handle_irq), lp
+
+ RETURN(IRQ)
+END(irq)
+
+
+/*
+ * Debug trap / illegal-instruction exception
+ *
+ * The stack-pointer (r3) should have already been saved to the memory
+ * location ENTRY_SP (the reason for this is that the interrupt vectors may be
+ * beyond a 22-bit signed offset jump from the actual interrupt handler, and
+ * this allows them to save the stack-pointer and use that register to do an
+ * indirect jump).
+ */
+G_ENTRY(dbtrap):
+ SAVE_STATE (DBTRAP, r0, ENTRY_SP)// Save registers.
+
+ /* First see if we came from kernel mode; if so, the dbtrap
+ instruction has a special meaning, to set the DIR (`debug
+ information register') register. This is because the DIR register
+ can _only_ be manipulated/read while in `debug mode,' and debug
+ mode is only active while we're inside the dbtrap handler. The
+ exact functionality is: { DIR = (DIR | r6) & ~r7; return DIR; }. */
+ ld.b PTO+PT_KERNEL_MODE[sp], r19
+ cmp r19, r0
+ bz 1f
+
+ stsr SR_DIR, r10
+ or r6, r10
+ not r7, r7
+ and r7, r10
+ ldsr r10, SR_DIR
+ stsr SR_DIR, r10 // Confirm the value we set
+ st.w r10, PTO+PT_GPR(10)[sp] // return it
+ br 3f
+
+1: ei // Enable interrupts.
+
+ /* The default signal type we raise. */
+ mov SIGTRAP, r6
+
+ /* See if it's a single-step trap. */
+ stsr SR_DBPSW, r19
+ andi 0x0800, r19, r19
+ bnz 2f
+
+ /* Look to see if the preceding instruction was is a dbtrap or not,
+ to decide which signal we should use. */
+ stsr SR_DBPC, r19 // PC following trapping insn
+ ld.hu -2[r19], r19
+ ori 0xf840, r0, r20 // DBTRAP insn
+ cmp r19, r20 // Was this trap caused by DBTRAP?
+ cmov ne, SIGILL, r6, r6 // Choose signal appropriately
+
+ /* Raise the desired signal. */
+2: mov CURRENT_TASK, r7 // Arg 1: task
+ jarl CSYM(send_sig), lp // tail call
+
+3: RETURN(DBTRAP)
+END(dbtrap)
+
+
+/*
+ * Hardware non-maskable interrupts.
+ *
+ * The stack-pointer (r3) should have already been saved to the memory
+ * location ENTRY_SP (the reason for this is that the interrupt vectors may be
+ * beyond a 22-bit signed offset jump from the actual interrupt handler, and
+ * this allows them to save the stack-pointer and use that register to do an
+ * indirect jump).
+ */
+G_ENTRY(nmi):
+ SAVE_STATE (NMI, r0, NMI_ENTRY_SP); /* Save registers. */
+
+ stsr SR_ECR, r6; /* Find out which nmi it was. */
+ shr 20, r6; /* Extract NMI code in bits 20-24. */
+ movea PTO, sp, r7; /* User regs are arg2. */
+
+ /* Non-maskable interrupts always lie right after maskable interrupts.
+ Call the generic IRQ handler, with two arguments, the IRQ number,
+ and a pointer to the user registers, to handle the specifics.
+ (we subtract one because the first NMI has code 1). */
+ addi FIRST_NMI - 1, r6, r6
+ jarl CSYM(handle_irq), lp
+
+ RETURN(NMI)
+END(nmi)
+
+
+/*
+ * Trap with no handler
+ */
+L_ENTRY(bad_trap_wrapper):
+ mov r19, r6 // Arg 0: trap number
+ movea PTO, sp, r7 // Arg 1: user regs
+ jr CSYM(bad_trap) // tail call handler
+END(bad_trap_wrapper)
+
+
+/*
+ * Invoke the scheduler, called from the trap/irq kernel exit path.
+ *
+ * This basically just calls `schedule', but also arranges for extra
+ * registers to be saved for ptrace'd processes, so ptrace can modify them.
+ */
+L_ENTRY(call_scheduler):
+ ld.w TASK_PTRACE[CURRENT_TASK], r19 // See if task is ptrace'd
+ cmp r19, r0
+ bnz 1f // ... yes, do special stuff
+ jr CSYM(schedule) // ... no, just tail-call scheduler
+
+ // Save extra regs for ptrace'd task. We want to save anything
+ // that would otherwise only be `implicitly' saved by the normal
+ // compiler calling-convention.
+1: mov sp, ep // Setup EP for SAVE_CALL_SAVED_REGS
+ SAVE_CALL_SAVED_REGS // Save call-saved registers to stack
+ mov lp, r20 // Save LP in a callee-saved register
+
+ jarl CSYM(schedule), lp // Call scheduler
+
+ mov r20, lp
+ mov sp, ep // We can't rely on EP after return
+ RESTORE_CALL_SAVED_REGS // Restore (possibly modified) regs
+ jmp [lp] // Return to the return path
+END(call_scheduler)
+
+
+/*
+ * This is an out-of-line handler for two special cases during the kernel
+ * trap/irq exit sequence:
+ *
+ * (1) If r18 is non-zero then a signal needs to be handled, which is
+ * done, and then the caller returned to.
+ *
+ * (2) If r18 is non-zero then we're returning to a ptraced process, which
+ * has several special cases -- single-stepping and trap tracing, both
+ * of which require using the `dbret' instruction to exit the kernel
+ * instead of the normal `reti' (this is because the CPU not correctly
+ * single-step after a reti). In this case, of course, this handler
+ * never returns to the caller.
+ *
+ * In either case, all registers should have been saved to the current
+ * state-save-frame on the stack, except for callee-saved registers.
+ *
+ * [These two different cases are combined merely to avoid bloating the
+ * macro-inlined code, not because they really make much sense together!]
+ */
+L_ENTRY(handle_signal_or_ptrace_return):
+ cmp r18, r0 // See if handling a signal
+ bz 1f // ... nope, go do ptrace return
+
+ // Handle a signal
+ mov lp, r20 // Save link-pointer
+ mov r10, r21 // Save return-values (for trap)
+ mov r11, r22
+
+ movea PTO, sp, r6 // Arg 1: struct pt_regs *regs
+ mov r0, r7 // Arg 2: sigset_t *oldset
+ jarl CSYM(do_signal), lp // Handle the signal
+ di // sig handling enables interrupts
+
+ mov r20, lp // Restore link-pointer
+ mov r21, r10 // Restore return-values (for trap)
+ mov r22, r11
+ ld.w TASK_PTRACE[CURRENT_TASK], r19 // check ptrace flags too
+ cmp r19, r0
+ bnz 1f // ... some set, so look more
+2: jmp [lp] // ... none set, so return normally
+
+ // ptrace return
+1: ld.w PTO+PT_PSW[sp], r19 // Look at user-processes's flags
+ andi 0x0800, r19, r19 // See if single-step flag is set
+ bz 2b // ... nope, return normally
+
+ // Return as if from a dbtrap insn
+ st.b r0, KM // Now officially in user state.
+ POP_STATE(DBTRAP) // Restore regs
+ st.w sp, KSP // Save the kernel stack pointer.
+ ld.w PT_GPR(GPR_SP)-PT_SIZE[sp], sp // Restore user stack pointer.
+ DBTRAP_RET // Return from the trap/interrupt.
+END(handle_signal_or_ptrace_return)
+
+
+/*
+ * This is where we switch between two threads. The arguments are:
+ * r6 -- pointer to the struct thread for the `current' process
+ * r7 -- pointer to the struct thread for the `new' process.
+ * when this function returns, it will return to the new thread.
+ */
+C_ENTRY(switch_thread):
+ // Return the previous task (r10 is not clobbered by restore below)
+ mov CURRENT_TASK, r10
+ // First, push the current processor state on the stack
+ PUSH_STATE(SWITCH)
+ // Now save the location of the kernel stack pointer for this thread;
+ // since we've pushed all other state on the stack, this is enough to
+ // restore it all later.
+ st.w sp, THREAD_KSP[r6]
+ // Now restore the stack pointer from the new process
+ ld.w THREAD_KSP[r7], sp
+ // ... and restore all state from that
+ POP_STATE(SWITCH)
+ // Update the current task pointer
+ GET_CURRENT_TASK(CURRENT_TASK)
+ // Now return into the new thread
+ jmp [lp]
+C_END(switch_thread)
+
+
+ .data
+
+ .align 4
+C_DATA(trap_table):
+ .long bad_trap_wrapper // trap 0, doesn't use trap table.
+ .long syscall_long // trap 1, `long' syscall.
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+ .long bad_trap_wrapper
+C_END(trap_table)
+
+
+ .section .rodata
+
+ .align 4
+C_DATA(sys_call_table):
+ .long CSYM(sys_restart_syscall) // 0
+ .long CSYM(sys_exit)
+ .long sys_fork_wrapper
+ .long CSYM(sys_read)
+ .long CSYM(sys_write)
+ .long CSYM(sys_open) // 5
+ .long CSYM(sys_close)
+ .long CSYM(sys_waitpid)
+ .long CSYM(sys_creat)
+ .long CSYM(sys_link)
+ .long CSYM(sys_unlink) // 10
+ .long sys_execve_wrapper
+ .long CSYM(sys_chdir)
+ .long CSYM(sys_time)
+ .long CSYM(sys_mknod)
+ .long CSYM(sys_chmod) // 15
+ .long CSYM(sys_chown)
+ .long CSYM(sys_ni_syscall) // was: break
+ .long CSYM(sys_ni_syscall) // was: oldstat (aka stat)
+ .long CSYM(sys_lseek)
+ .long CSYM(sys_getpid) // 20
+ .long CSYM(sys_mount)
+ .long CSYM(sys_oldumount)
+ .long CSYM(sys_setuid)
+ .long CSYM(sys_getuid)
+ .long CSYM(sys_stime) // 25
+ .long CSYM(sys_ptrace)
+ .long CSYM(sys_alarm)
+ .long CSYM(sys_ni_syscall) // was: oldfstat (aka fstat)
+ .long CSYM(sys_pause)
+ .long CSYM(sys_utime) // 30
+ .long CSYM(sys_ni_syscall) // was: stty
+ .long CSYM(sys_ni_syscall) // was: gtty
+ .long CSYM(sys_access)
+ .long CSYM(sys_nice)
+ .long CSYM(sys_ni_syscall) // 35, was: ftime
+ .long CSYM(sys_sync)
+ .long CSYM(sys_kill)
+ .long CSYM(sys_rename)
+ .long CSYM(sys_mkdir)
+ .long CSYM(sys_rmdir) // 40
+ .long CSYM(sys_dup)
+ .long CSYM(sys_pipe)
+ .long CSYM(sys_times)
+ .long CSYM(sys_ni_syscall) // was: prof
+ .long CSYM(sys_brk) // 45
+ .long CSYM(sys_setgid)
+ .long CSYM(sys_getgid)
+ .long CSYM(sys_signal)
+ .long CSYM(sys_geteuid)
+ .long CSYM(sys_getegid) // 50
+ .long CSYM(sys_acct)
+ .long CSYM(sys_umount) // recycled never used phys()
+ .long CSYM(sys_ni_syscall) // was: lock
+ .long CSYM(sys_ioctl)
+ .long CSYM(sys_fcntl) // 55
+ .long CSYM(sys_ni_syscall) // was: mpx
+ .long CSYM(sys_setpgid)
+ .long CSYM(sys_ni_syscall) // was: ulimit
+ .long CSYM(sys_ni_syscall)
+ .long CSYM(sys_umask) // 60
+ .long CSYM(sys_chroot)
+ .long CSYM(sys_ustat)
+ .long CSYM(sys_dup2)
+ .long CSYM(sys_getppid)
+ .long CSYM(sys_getpgrp) // 65
+ .long CSYM(sys_setsid)
+ .long CSYM(sys_sigaction)
+ .long CSYM(sys_sgetmask)
+ .long CSYM(sys_ssetmask)
+ .long CSYM(sys_setreuid) // 70
+ .long CSYM(sys_setregid)
+ .long sys_sigsuspend_wrapper
+ .long CSYM(sys_sigpending)
+ .long CSYM(sys_sethostname)
+ .long CSYM(sys_setrlimit) // 75
+ .long CSYM(sys_getrlimit)
+ .long CSYM(sys_getrusage)
+ .long CSYM(sys_gettimeofday)
+ .long CSYM(sys_settimeofday)
+ .long CSYM(sys_getgroups) // 80
+ .long CSYM(sys_setgroups)
+ .long CSYM(sys_select)
+ .long CSYM(sys_symlink)
+ .long CSYM(sys_ni_syscall) // was: oldlstat (aka lstat)
+ .long CSYM(sys_readlink) // 85
+ .long CSYM(sys_uselib)
+ .long CSYM(sys_swapon)
+ .long CSYM(sys_reboot)
+ .long CSYM(old_readdir)
+ .long CSYM(sys_mmap) // 90
+ .long CSYM(sys_munmap)
+ .long CSYM(sys_truncate)
+ .long CSYM(sys_ftruncate)
+ .long CSYM(sys_fchmod)
+ .long CSYM(sys_fchown) // 95
+ .long CSYM(sys_getpriority)
+ .long CSYM(sys_setpriority)
+ .long CSYM(sys_ni_syscall) // was: profil
+ .long CSYM(sys_statfs)
+ .long CSYM(sys_fstatfs) // 100
+ .long CSYM(sys_ni_syscall) // i386: ioperm
+ .long CSYM(sys_socketcall)
+ .long CSYM(sys_syslog)
+ .long CSYM(sys_setitimer)
+ .long CSYM(sys_getitimer) // 105
+ .long CSYM(sys_newstat)
+ .long CSYM(sys_newlstat)
+ .long CSYM(sys_newfstat)
+ .long CSYM(sys_ni_syscall) // was: olduname (aka uname)
+ .long CSYM(sys_ni_syscall) // 110, i386: iopl
+ .long CSYM(sys_vhangup)
+ .long CSYM(sys_ni_syscall) // was: idle
+ .long CSYM(sys_ni_syscall) // i386: vm86old
+ .long CSYM(sys_wait4)
+ .long CSYM(sys_swapoff) // 115
+ .long CSYM(sys_sysinfo)
+ .long CSYM(sys_ipc)
+ .long CSYM(sys_fsync)
+ .long sys_sigreturn_wrapper
+ .long sys_clone_wrapper // 120
+ .long CSYM(sys_setdomainname)
+ .long CSYM(sys_newuname)
+ .long CSYM(sys_ni_syscall) // i386: modify_ldt, m68k: cacheflush
+ .long CSYM(sys_adjtimex)
+ .long CSYM(sys_ni_syscall) // 125 - sys_mprotect
+ .long CSYM(sys_sigprocmask)
+ .long CSYM(sys_ni_syscall) // sys_create_module
+ .long CSYM(sys_init_module)
+ .long CSYM(sys_delete_module)
+ .long CSYM(sys_ni_syscall) // 130 - sys_get_kernel_syms
+ .long CSYM(sys_quotactl)
+ .long CSYM(sys_getpgid)
+ .long CSYM(sys_fchdir)
+ .long CSYM(sys_bdflush)
+ .long CSYM(sys_sysfs) // 135
+ .long CSYM(sys_personality)
+ .long CSYM(sys_ni_syscall) // for afs_syscall
+ .long CSYM(sys_setfsuid)
+ .long CSYM(sys_setfsgid)
+ .long CSYM(sys_llseek) // 140
+ .long CSYM(sys_getdents)
+ .long CSYM(sys_select) // for backward compat; remove someday
+ .long CSYM(sys_flock)
+ .long CSYM(sys_ni_syscall) // sys_msync
+ .long CSYM(sys_readv) // 145
+ .long CSYM(sys_writev)
+ .long CSYM(sys_getsid)
+ .long CSYM(sys_fdatasync)
+ .long CSYM(sys_sysctl)
+ .long CSYM(sys_ni_syscall) // 150 - sys_mlock
+ .long CSYM(sys_ni_syscall) // sys_munlock
+ .long CSYM(sys_ni_syscall) // sys_mlockall
+ .long CSYM(sys_ni_syscall) // sys_munlockall
+ .long CSYM(sys_sched_setparam)
+ .long CSYM(sys_sched_getparam) // 155
+ .long CSYM(sys_sched_setscheduler)
+ .long CSYM(sys_sched_getscheduler)
+ .long CSYM(sys_sched_yield)
+ .long CSYM(sys_sched_get_priority_max)
+ .long CSYM(sys_sched_get_priority_min) // 160
+ .long CSYM(sys_sched_rr_get_interval)
+ .long CSYM(sys_nanosleep)
+ .long CSYM(sys_ni_syscall) // sys_mremap
+ .long CSYM(sys_setresuid)
+ .long CSYM(sys_getresuid) // 165
+ .long CSYM(sys_ni_syscall) // for vm86
+ .long CSYM(sys_ni_syscall) // sys_query_module
+ .long CSYM(sys_poll)
+ .long CSYM(sys_nfsservctl)
+ .long CSYM(sys_setresgid) // 170
+ .long CSYM(sys_getresgid)
+ .long CSYM(sys_prctl)
+ .long sys_rt_sigreturn_wrapper
+ .long CSYM(sys_rt_sigaction)
+ .long CSYM(sys_rt_sigprocmask) // 175
+ .long CSYM(sys_rt_sigpending)
+ .long CSYM(sys_rt_sigtimedwait)
+ .long CSYM(sys_rt_sigqueueinfo)
+ .long sys_rt_sigsuspend_wrapper
+ .long CSYM(sys_pread64) // 180
+ .long CSYM(sys_pwrite64)
+ .long CSYM(sys_lchown)
+ .long CSYM(sys_getcwd)
+ .long CSYM(sys_capget)
+ .long CSYM(sys_capset) // 185
+ .long CSYM(sys_sigaltstack)
+ .long CSYM(sys_sendfile)
+ .long CSYM(sys_ni_syscall) // streams1
+ .long CSYM(sys_ni_syscall) // streams2
+ .long sys_vfork_wrapper // 190
+ .long CSYM(sys_ni_syscall)
+ .long CSYM(sys_mmap2)
+ .long CSYM(sys_truncate64)
+ .long CSYM(sys_ftruncate64)
+ .long CSYM(sys_stat64) // 195
+ .long CSYM(sys_lstat64)
+ .long CSYM(sys_fstat64)
+ .long CSYM(sys_fcntl64)
+ .long CSYM(sys_getdents64)
+ .long CSYM(sys_pivot_root) // 200
+ .long CSYM(sys_gettid)
+ .long CSYM(sys_tkill)
+sys_call_table_end:
+C_END(sys_call_table)