diff options
| -rw-r--r-- | arch/tile/include/asm/backtrace.h | 82 | ||||
| -rw-r--r-- | arch/tile/include/asm/opcode-tile_32.h | 7 | ||||
| -rw-r--r-- | arch/tile/include/asm/opcode-tile_64.h | 7 | ||||
| -rw-r--r-- | arch/tile/kernel/backtrace.c | 103 | ||||
| -rw-r--r-- | arch/tile/kernel/stack.c | 14 | ||||
| -rw-r--r-- | arch/tile/kernel/tile-desc_32.c | 11 |
6 files changed, 93 insertions, 131 deletions
diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h index f18887d..bd5399a 100644 --- a/arch/tile/include/asm/backtrace.h +++ b/arch/tile/include/asm/backtrace.h @@ -12,80 +12,41 @@ * more details. */ -#ifndef _TILE_BACKTRACE_H -#define _TILE_BACKTRACE_H - - +#ifndef _ASM_TILE_BACKTRACE_H +#define _ASM_TILE_BACKTRACE_H #include <linux/types.h> -#include <arch/chip.h> - -#if defined(__tile__) -typedef unsigned long VirtualAddress; -#elif CHIP_VA_WIDTH() > 32 -typedef unsigned long long VirtualAddress; -#else -typedef unsigned int VirtualAddress; -#endif - - -/** Reads 'size' bytes from 'address' and writes the data to 'result'. +/* Reads 'size' bytes from 'address' and writes the data to 'result'. * Returns true if successful, else false (e.g. memory not readable). */ typedef bool (*BacktraceMemoryReader)(void *result, - VirtualAddress address, + unsigned long address, unsigned int size, void *extra); typedef struct { - /** Current PC. */ - VirtualAddress pc; + /* Current PC. */ + unsigned long pc; - /** Current stack pointer value. */ - VirtualAddress sp; + /* Current stack pointer value. */ + unsigned long sp; - /** Current frame pointer value (i.e. caller's stack pointer) */ - VirtualAddress fp; + /* Current frame pointer value (i.e. caller's stack pointer) */ + unsigned long fp; - /** Internal use only: caller's PC for first frame. */ - VirtualAddress initial_frame_caller_pc; + /* Internal use only: caller's PC for first frame. */ + unsigned long initial_frame_caller_pc; - /** Internal use only: callback to read memory. */ + /* Internal use only: callback to read memory. */ BacktraceMemoryReader read_memory_func; - /** Internal use only: arbitrary argument to read_memory_func. */ + /* Internal use only: arbitrary argument to read_memory_func. */ void *read_memory_func_extra; } BacktraceIterator; -/** Initializes a backtracer to start from the given location. - * - * If the frame pointer cannot be determined it is set to -1. - * - * @param state The state to be filled in. - * @param read_memory_func A callback that reads memory. If NULL, a default - * value is provided. - * @param read_memory_func_extra An arbitrary argument to read_memory_func. - * @param pc The current PC. - * @param lr The current value of the 'lr' register. - * @param sp The current value of the 'sp' register. - * @param r52 The current value of the 'r52' register. - */ -extern void backtrace_init(BacktraceIterator *state, - BacktraceMemoryReader read_memory_func, - void *read_memory_func_extra, - VirtualAddress pc, VirtualAddress lr, - VirtualAddress sp, VirtualAddress r52); - - -/** Advances the backtracing state to the calling frame, returning - * true iff successful. - */ -extern bool backtrace_next(BacktraceIterator *state); - - typedef enum { /* We have no idea what the caller's pc is. */ @@ -138,7 +99,7 @@ enum { }; -/** Internal constants used to define 'info' operands. */ +/* Internal constants used to define 'info' operands. */ enum { /* 0 and 1 are reserved, as are all negative numbers. */ @@ -147,13 +108,10 @@ enum { CALLER_SP_IN_R52_BASE = 4, CALLER_SP_OFFSET_BASE = 8, - - /* Marks the entry point of certain functions. */ - ENTRY_POINT_INFO_OP = 16 }; -/** Current backtracer state describing where it thinks the caller is. */ +/* Current backtracer state describing where it thinks the caller is. */ typedef struct { /* * Public fields @@ -192,7 +150,13 @@ typedef struct { } CallerLocation; +extern void backtrace_init(BacktraceIterator *state, + BacktraceMemoryReader read_memory_func, + void *read_memory_func_extra, + unsigned long pc, unsigned long lr, + unsigned long sp, unsigned long r52); +extern bool backtrace_next(BacktraceIterator *state); -#endif /* _TILE_BACKTRACE_H */ +#endif /* _ASM_TILE_BACKTRACE_H */ diff --git a/arch/tile/include/asm/opcode-tile_32.h b/arch/tile/include/asm/opcode-tile_32.h index eda60ec..03df7b1 100644 --- a/arch/tile/include/asm/opcode-tile_32.h +++ b/arch/tile/include/asm/opcode-tile_32.h @@ -1502,5 +1502,12 @@ extern int parse_insn_tile(tile_bundle_bits bits, decoded[TILE_MAX_INSTRUCTIONS_PER_BUNDLE]); +/* Given a set of bundle bits and a specific pipe, returns which + * instruction the bundle contains in that pipe. + */ +extern const struct tile_opcode * +find_opcode(tile_bundle_bits bits, tile_pipeline pipe); + + #endif /* opcode_tile_h */ diff --git a/arch/tile/include/asm/opcode-tile_64.h b/arch/tile/include/asm/opcode-tile_64.h index eda60ec..03df7b1 100644 --- a/arch/tile/include/asm/opcode-tile_64.h +++ b/arch/tile/include/asm/opcode-tile_64.h @@ -1502,5 +1502,12 @@ extern int parse_insn_tile(tile_bundle_bits bits, decoded[TILE_MAX_INSTRUCTIONS_PER_BUNDLE]); +/* Given a set of bundle bits and a specific pipe, returns which + * instruction the bundle contains in that pipe. + */ +extern const struct tile_opcode * +find_opcode(tile_bundle_bits bits, tile_pipeline pipe); + + #endif /* opcode_tile_h */ diff --git a/arch/tile/kernel/backtrace.c b/arch/tile/kernel/backtrace.c index 55a6a74..1dc71ea 100644 --- a/arch/tile/kernel/backtrace.c +++ b/arch/tile/kernel/backtrace.c @@ -14,19 +14,11 @@ #include <linux/kernel.h> #include <linux/string.h> - #include <asm/backtrace.h> - -#include <arch/chip.h> - #include <asm/opcode-tile.h> +#include <arch/abi.h> - -#define TREG_SP 54 -#define TREG_LR 55 - - -#if TILE_CHIP >= 10 +#ifdef __tilegx__ #define tile_bundle_bits tilegx_bundle_bits #define TILE_MAX_INSTRUCTIONS_PER_BUNDLE TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE #define TILE_BUNDLE_ALIGNMENT_IN_BYTES TILEGX_BUNDLE_ALIGNMENT_IN_BYTES @@ -47,7 +39,7 @@ typedef long long bt_int_reg_t; typedef int bt_int_reg_t; #endif -/** A decoded bundle used for backtracer analysis. */ +/* A decoded bundle used for backtracer analysis. */ struct BacktraceBundle { tile_bundle_bits bits; int num_insns; @@ -56,23 +48,7 @@ struct BacktraceBundle { }; -/* This implementation only makes sense for native tools. */ -/** Default function to read memory. */ -static bool bt_read_memory(void *result, VirtualAddress addr, - unsigned int size, void *extra) -{ - /* FIXME: this should do some horrible signal stuff to catch - * SEGV cleanly and fail. - * - * Or else the caller should do the setjmp for efficiency. - */ - - memcpy(result, (const void *)addr, size); - return true; -} - - -/** Locates an instruction inside the given bundle that +/* Locates an instruction inside the given bundle that * has the specified mnemonic, and whose first 'num_operands_to_match' * operands exactly match those in 'operand_values'. */ @@ -107,13 +83,13 @@ static const struct tile_decoded_instruction *find_matching_insn( return NULL; } -/** Does this bundle contain an 'iret' instruction? */ +/* Does this bundle contain an 'iret' instruction? */ static inline bool bt_has_iret(const struct BacktraceBundle *bundle) { return find_matching_insn(bundle, TILE_OPC_IRET, NULL, 0) != NULL; } -/** Does this bundle contain an 'addi sp, sp, OFFSET' or +/* Does this bundle contain an 'addi sp, sp, OFFSET' or * 'addli sp, sp, OFFSET' instruction, and if so, what is OFFSET? */ static bool bt_has_addi_sp(const struct BacktraceBundle *bundle, int *adjust) @@ -124,7 +100,7 @@ static bool bt_has_addi_sp(const struct BacktraceBundle *bundle, int *adjust) find_matching_insn(bundle, TILE_OPC_ADDI, vals, 2); if (insn == NULL) insn = find_matching_insn(bundle, TILE_OPC_ADDLI, vals, 2); -#if TILE_CHIP >= 10 +#ifdef __tilegx__ if (insn == NULL) insn = find_matching_insn(bundle, TILEGX_OPC_ADDXLI, vals, 2); if (insn == NULL) @@ -137,7 +113,7 @@ static bool bt_has_addi_sp(const struct BacktraceBundle *bundle, int *adjust) return true; } -/** Does this bundle contain any 'info OP' or 'infol OP' +/* Does this bundle contain any 'info OP' or 'infol OP' * instruction, and if so, what are their OP? Note that OP is interpreted * as an unsigned value by this code since that's what the caller wants. * Returns the number of info ops found. @@ -161,7 +137,7 @@ static int bt_get_info_ops(const struct BacktraceBundle *bundle, return num_ops; } -/** Does this bundle contain a jrp instruction, and if so, to which +/* Does this bundle contain a jrp instruction, and if so, to which * register is it jumping? */ static bool bt_has_jrp(const struct BacktraceBundle *bundle, int *target_reg) @@ -175,7 +151,7 @@ static bool bt_has_jrp(const struct BacktraceBundle *bundle, int *target_reg) return true; } -/** Does this bundle modify the specified register in any way? */ +/* Does this bundle modify the specified register in any way? */ static bool bt_modifies_reg(const struct BacktraceBundle *bundle, int reg) { int i, j; @@ -195,34 +171,34 @@ static bool bt_modifies_reg(const struct BacktraceBundle *bundle, int reg) return false; } -/** Does this bundle modify sp? */ +/* Does this bundle modify sp? */ static inline bool bt_modifies_sp(const struct BacktraceBundle *bundle) { return bt_modifies_reg(bundle, TREG_SP); } -/** Does this bundle modify lr? */ +/* Does this bundle modify lr? */ static inline bool bt_modifies_lr(const struct BacktraceBundle *bundle) { return bt_modifies_reg(bundle, TREG_LR); } -/** Does this bundle contain the instruction 'move fp, sp'? */ +/* Does this bundle contain the instruction 'move fp, sp'? */ static inline bool bt_has_move_r52_sp(const struct BacktraceBundle *bundle) { static const int vals[2] = { 52, TREG_SP }; return find_matching_insn(bundle, TILE_OPC_MOVE, vals, 2) != NULL; } -/** Does this bundle contain a store of lr to sp? */ +/* Does this bundle contain a store of lr to sp? */ static inline bool bt_has_sw_sp_lr(const struct BacktraceBundle *bundle) { static const int vals[2] = { TREG_SP, TREG_LR }; return find_matching_insn(bundle, OPCODE_STORE, vals, 2) != NULL; } -#if TILE_CHIP >= 10 -/** Track moveli values placed into registers. */ +#ifdef __tilegx__ +/* Track moveli values placed into registers. */ static inline void bt_update_moveli(const struct BacktraceBundle *bundle, int moveli_args[]) { @@ -238,7 +214,7 @@ static inline void bt_update_moveli(const struct BacktraceBundle *bundle, } } -/** Does this bundle contain an 'add sp, sp, reg' instruction +/* Does this bundle contain an 'add sp, sp, reg' instruction * from a register that we saw a moveli into, and if so, what * is the value in the register? */ @@ -260,11 +236,11 @@ static bool bt_has_add_sp(const struct BacktraceBundle *bundle, int *adjust, } #endif -/** Locates the caller's PC and SP for a program starting at the +/* Locates the caller's PC and SP for a program starting at the * given address. */ static void find_caller_pc_and_caller_sp(CallerLocation *location, - const VirtualAddress start_pc, + const unsigned long start_pc, BacktraceMemoryReader read_memory_func, void *read_memory_func_extra) { @@ -288,9 +264,9 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, tile_bundle_bits prefetched_bundles[32]; int num_bundles_prefetched = 0; int next_bundle = 0; - VirtualAddress pc; + unsigned long pc; -#if TILE_CHIP >= 10 +#ifdef __tilegx__ /* Naively try to track moveli values to support addx for -m32. */ int moveli_args[TILEGX_NUM_REGISTERS] = { 0 }; #endif @@ -369,10 +345,6 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, /* Weird; reserved value, ignore it. */ continue; } - if (info_operand & ENTRY_POINT_INFO_OP) { - /* This info op is ignored by the backtracer. */ - continue; - } /* Skip info ops which are not in the * "one_ago" mode we want right now. @@ -453,7 +425,7 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, if (!sp_determined) { int adjust; if (bt_has_addi_sp(&bundle, &adjust) -#if TILE_CHIP >= 10 +#ifdef __tilegx__ || bt_has_add_sp(&bundle, &adjust, moveli_args) #endif ) { @@ -504,7 +476,7 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, } } -#if TILE_CHIP >= 10 +#ifdef __tilegx__ /* Track moveli arguments for -m32 mode. */ bt_update_moveli(&bundle, moveli_args); #endif @@ -546,18 +518,26 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, } } +/* Initializes a backtracer to start from the given location. + * + * If the frame pointer cannot be determined it is set to -1. + * + * state: The state to be filled in. + * read_memory_func: A callback that reads memory. + * read_memory_func_extra: An arbitrary argument to read_memory_func. + * pc: The current PC. + * lr: The current value of the 'lr' register. + * sp: The current value of the 'sp' register. + * r52: The current value of the 'r52' register. + */ void backtrace_init(BacktraceIterator *state, BacktraceMemoryReader read_memory_func, void *read_memory_func_extra, - VirtualAddress pc, VirtualAddress lr, - VirtualAddress sp, VirtualAddress r52) + unsigned long pc, unsigned long lr, + unsigned long sp, unsigned long r52) { CallerLocation location; - VirtualAddress fp, initial_frame_caller_pc; - - if (read_memory_func == NULL) { - read_memory_func = bt_read_memory; - } + unsigned long fp, initial_frame_caller_pc; /* Find out where we are in the initial frame. */ find_caller_pc_and_caller_sp(&location, pc, @@ -630,12 +610,15 @@ void backtrace_init(BacktraceIterator *state, /* Handle the case where the register holds more bits than the VA. */ static bool valid_addr_reg(bt_int_reg_t reg) { - return ((VirtualAddress)reg == reg); + return ((unsigned long)reg == reg); } +/* Advances the backtracing state to the calling frame, returning + * true iff successful. + */ bool backtrace_next(BacktraceIterator *state) { - VirtualAddress next_fp, next_pc; + unsigned long next_fp, next_pc; bt_int_reg_t next_frame[2]; if (state->fp == -1) { diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c index dd81713..37ee4d0 100644 --- a/arch/tile/kernel/stack.c +++ b/arch/tile/kernel/stack.c @@ -36,7 +36,7 @@ #define KBT_LOOP 3 /* Backtrace entered a loop */ /* Is address on the specified kernel stack? */ -static int in_kernel_stack(struct KBacktraceIterator *kbt, VirtualAddress sp) +static int in_kernel_stack(struct KBacktraceIterator *kbt, unsigned long sp) { ulong kstack_base = (ulong) kbt->task->stack; if (kstack_base == 0) /* corrupt task pointer; just follow stack... */ @@ -45,7 +45,7 @@ static int in_kernel_stack(struct KBacktraceIterator *kbt, VirtualAddress sp) } /* Is address valid for reading? */ -static int valid_address(struct KBacktraceIterator *kbt, VirtualAddress address) +static int valid_address(struct KBacktraceIterator *kbt, unsigned long address) { HV_PTE *l1_pgtable = kbt->pgtable; HV_PTE *l2_pgtable; @@ -97,7 +97,7 @@ static int valid_address(struct KBacktraceIterator *kbt, VirtualAddress address) } /* Callback for backtracer; basically a glorified memcpy */ -static bool read_memory_func(void *result, VirtualAddress address, +static bool read_memory_func(void *result, unsigned long address, unsigned int size, void *vkbt) { int retval; @@ -124,7 +124,7 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt) { const char *fault = NULL; /* happy compiler */ char fault_buf[64]; - VirtualAddress sp = kbt->it.sp; + unsigned long sp = kbt->it.sp; struct pt_regs *p; if (!in_kernel_stack(kbt, sp)) @@ -163,7 +163,7 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt) } /* Is the pc pointing to a sigreturn trampoline? */ -static int is_sigreturn(VirtualAddress pc) +static int is_sigreturn(unsigned long pc) { return (pc == VDSO_BASE); } @@ -260,7 +260,7 @@ static void validate_stack(struct pt_regs *regs) void KBacktraceIterator_init(struct KBacktraceIterator *kbt, struct task_struct *t, struct pt_regs *regs) { - VirtualAddress pc, lr, sp, r52; + unsigned long pc, lr, sp, r52; int is_current; /* @@ -331,7 +331,7 @@ EXPORT_SYMBOL(KBacktraceIterator_end); void KBacktraceIterator_next(struct KBacktraceIterator *kbt) { - VirtualAddress old_pc = kbt->it.pc, old_sp = kbt->it.sp; + unsigned long old_pc = kbt->it.pc, old_sp = kbt->it.sp; kbt->new_context = 0; if (!backtrace_next(&kbt->it) && !KBacktraceIterator_restart(kbt)) { kbt->end = KBT_DONE; diff --git a/arch/tile/kernel/tile-desc_32.c b/arch/tile/kernel/tile-desc_32.c index 69af0e1..7e31a12 100644 --- a/arch/tile/kernel/tile-desc_32.c +++ b/arch/tile/kernel/tile-desc_32.c @@ -2413,12 +2413,13 @@ const struct tile_operand tile_operands[43] = -/* Given a set of bundle bits and the lookup FSM for a specific pipe, - * returns which instruction the bundle contains in that pipe. +/* Given a set of bundle bits and a specific pipe, returns which + * instruction the bundle contains in that pipe. */ -static const struct tile_opcode * -find_opcode(tile_bundle_bits bits, const unsigned short *table) +const struct tile_opcode * +find_opcode(tile_bundle_bits bits, tile_pipeline pipe) { + const unsigned short *table = tile_bundle_decoder_fsms[pipe]; int index = 0; while (1) @@ -2465,7 +2466,7 @@ parse_insn_tile(tile_bundle_bits bits, int i; d = &decoded[num_instructions++]; - opc = find_opcode (bits, tile_bundle_decoder_fsms[pipe]); + opc = find_opcode (bits, (tile_pipeline)pipe); d->opcode = opc; /* Decode each operand, sign extending, etc. as appropriate. */ |
