mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
165 lines
5.7 KiB
165 lines
5.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* Copyright (C) 2000, 2002-2003 Hewlett-Packard Co |
|
* David Mosberger-Tang <[email protected]> |
|
* |
|
* Kernel unwind support. |
|
*/ |
|
|
|
#define UNW_VER(x) ((x) >> 48) |
|
#define UNW_FLAG_MASK 0x0000ffff00000000 |
|
#define UNW_FLAG_OSMASK 0x0000f00000000000 |
|
#define UNW_FLAG_EHANDLER(x) ((x) & 0x0000000100000000L) |
|
#define UNW_FLAG_UHANDLER(x) ((x) & 0x0000000200000000L) |
|
#define UNW_LENGTH(x) ((x) & 0x00000000ffffffffL) |
|
|
|
enum unw_register_index { |
|
/* primary unat: */ |
|
UNW_REG_PRI_UNAT_GR, |
|
UNW_REG_PRI_UNAT_MEM, |
|
|
|
/* register stack */ |
|
UNW_REG_BSP, /* register stack pointer */ |
|
UNW_REG_BSPSTORE, |
|
UNW_REG_PFS, /* previous function state */ |
|
UNW_REG_RNAT, |
|
/* memory stack */ |
|
UNW_REG_PSP, /* previous memory stack pointer */ |
|
/* return pointer: */ |
|
UNW_REG_RP, |
|
|
|
/* preserved registers: */ |
|
UNW_REG_R4, UNW_REG_R5, UNW_REG_R6, UNW_REG_R7, |
|
UNW_REG_UNAT, UNW_REG_PR, UNW_REG_LC, UNW_REG_FPSR, |
|
UNW_REG_B1, UNW_REG_B2, UNW_REG_B3, UNW_REG_B4, UNW_REG_B5, |
|
UNW_REG_F2, UNW_REG_F3, UNW_REG_F4, UNW_REG_F5, |
|
UNW_REG_F16, UNW_REG_F17, UNW_REG_F18, UNW_REG_F19, |
|
UNW_REG_F20, UNW_REG_F21, UNW_REG_F22, UNW_REG_F23, |
|
UNW_REG_F24, UNW_REG_F25, UNW_REG_F26, UNW_REG_F27, |
|
UNW_REG_F28, UNW_REG_F29, UNW_REG_F30, UNW_REG_F31, |
|
UNW_NUM_REGS |
|
}; |
|
|
|
struct unw_info_block { |
|
u64 header; |
|
u64 desc[]; /* unwind descriptors */ |
|
/* personality routine and language-specific data follow behind descriptors */ |
|
}; |
|
|
|
struct unw_table { |
|
struct unw_table *next; /* must be first member! */ |
|
const char *name; |
|
unsigned long gp; /* global pointer for this load-module */ |
|
unsigned long segment_base; /* base for offsets in the unwind table entries */ |
|
unsigned long start; |
|
unsigned long end; |
|
const struct unw_table_entry *array; |
|
unsigned long length; |
|
}; |
|
|
|
enum unw_where { |
|
UNW_WHERE_NONE, /* register isn't saved at all */ |
|
UNW_WHERE_GR, /* register is saved in a general register */ |
|
UNW_WHERE_FR, /* register is saved in a floating-point register */ |
|
UNW_WHERE_BR, /* register is saved in a branch register */ |
|
UNW_WHERE_SPREL, /* register is saved on memstack (sp-relative) */ |
|
UNW_WHERE_PSPREL, /* register is saved on memstack (psp-relative) */ |
|
/* |
|
* At the end of each prologue these locations get resolved to |
|
* UNW_WHERE_PSPREL and UNW_WHERE_GR, respectively: |
|
*/ |
|
UNW_WHERE_SPILL_HOME, /* register is saved in its spill home */ |
|
UNW_WHERE_GR_SAVE /* register is saved in next general register */ |
|
}; |
|
|
|
#define UNW_WHEN_NEVER 0x7fffffff |
|
|
|
struct unw_reg_info { |
|
unsigned long val; /* save location: register number or offset */ |
|
enum unw_where where; /* where the register gets saved */ |
|
int when; /* when the register gets saved */ |
|
}; |
|
|
|
struct unw_reg_state { |
|
struct unw_reg_state *next; /* next (outer) element on state stack */ |
|
struct unw_reg_info reg[UNW_NUM_REGS]; /* register save locations */ |
|
}; |
|
|
|
struct unw_labeled_state { |
|
struct unw_labeled_state *next; /* next labeled state (or NULL) */ |
|
unsigned long label; /* label for this state */ |
|
struct unw_reg_state saved_state; |
|
}; |
|
|
|
struct unw_state_record { |
|
unsigned int first_region : 1; /* is this the first region? */ |
|
unsigned int done : 1; /* are we done scanning descriptors? */ |
|
unsigned int any_spills : 1; /* got any register spills? */ |
|
unsigned int in_body : 1; /* are we inside a body (as opposed to a prologue)? */ |
|
unsigned long flags; /* see UNW_FLAG_* in unwind.h */ |
|
|
|
u8 *imask; /* imask of spill_mask record or NULL */ |
|
unsigned long pr_val; /* predicate values */ |
|
unsigned long pr_mask; /* predicate mask */ |
|
long spill_offset; /* psp-relative offset for spill base */ |
|
int region_start; |
|
int region_len; |
|
int epilogue_start; |
|
int epilogue_count; |
|
int when_target; |
|
|
|
u8 gr_save_loc; /* next general register to use for saving a register */ |
|
u8 return_link_reg; /* branch register in which the return link is passed */ |
|
|
|
struct unw_labeled_state *labeled_states; /* list of all labeled states */ |
|
struct unw_reg_state curr; /* current state */ |
|
}; |
|
|
|
enum unw_nat_type { |
|
UNW_NAT_NONE, /* NaT not represented */ |
|
UNW_NAT_VAL, /* NaT represented by NaT value (fp reg) */ |
|
UNW_NAT_MEMSTK, /* NaT value is in unat word at offset OFF */ |
|
UNW_NAT_REGSTK /* NaT is in rnat */ |
|
}; |
|
|
|
enum unw_insn_opcode { |
|
UNW_INSN_ADD, /* s[dst] += val */ |
|
UNW_INSN_ADD_PSP, /* s[dst] = (s.psp + val) */ |
|
UNW_INSN_ADD_SP, /* s[dst] = (s.sp + val) */ |
|
UNW_INSN_MOVE, /* s[dst] = s[val] */ |
|
UNW_INSN_MOVE2, /* s[dst] = s[val]; s[dst+1] = s[val+1] */ |
|
UNW_INSN_MOVE_STACKED, /* s[dst] = ia64_rse_skip(*s.bsp, val) */ |
|
UNW_INSN_SETNAT_MEMSTK, /* s[dst+1].nat.type = MEMSTK; |
|
s[dst+1].nat.off = *s.pri_unat - s[dst] */ |
|
UNW_INSN_SETNAT_TYPE, /* s[dst+1].nat.type = val */ |
|
UNW_INSN_LOAD, /* s[dst] = *s[val] */ |
|
UNW_INSN_MOVE_SCRATCH, /* s[dst] = scratch reg "val" */ |
|
UNW_INSN_MOVE_CONST, /* s[dst] = constant reg "val" */ |
|
}; |
|
|
|
struct unw_insn { |
|
unsigned int opc : 4; |
|
unsigned int dst : 9; |
|
signed int val : 19; |
|
}; |
|
|
|
/* |
|
* Preserved general static registers (r4-r7) give rise to two script |
|
* instructions; everything else yields at most one instruction; at |
|
* the end of the script, the psp gets popped, accounting for one more |
|
* instruction. |
|
*/ |
|
#define UNW_MAX_SCRIPT_LEN (UNW_NUM_REGS + 5) |
|
|
|
struct unw_script { |
|
unsigned long ip; /* ip this script is for */ |
|
unsigned long pr_mask; /* mask of predicates script depends on */ |
|
unsigned long pr_val; /* predicate values this script is for */ |
|
rwlock_t lock; |
|
unsigned int flags; /* see UNW_FLAG_* in unwind.h */ |
|
unsigned short lru_chain; /* used for least-recently-used chain */ |
|
unsigned short coll_chain; /* used for hash collisions */ |
|
unsigned short hint; /* hint for next script to try (or -1) */ |
|
unsigned short count; /* number of instructions in script */ |
|
struct unw_insn insn[UNW_MAX_SCRIPT_LEN]; |
|
};
|
|
|