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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [pef-traceback.h] - Blame information for rev 298

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1 24 jeremybenn
/* PowerPC traceback table support for BFD.
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   Copyright 1993, 1998, 1999, 2000, 2001, 2002, 2005, 2007
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   Free Software Foundation, Inc.
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   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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/* Originally written by Ira Ruben, 06/28/93.  */
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/*  This is a compiler independent representation of the AIX Version 3 traceback table (in
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    sys/debug.h), which occurs, usually, one per procedure (routine). The table is marked by
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    a multiple of 4 32-bit word of zeroes in the instruction space. The traceback table is
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    also referred to as "procedure-end table".
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    The AIX traceback table representation on which this header is based is defined as a
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    series of bit field struct specifications. Bit fields are compiler dependent! Thus,
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    the definitions presented here follow the original header and the existing documentation
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    (such as it is), but define the fields as BIT MASKS and other macros. The mask names,
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    however, where chosen as the original field names to give some compatibility with the
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    original header and to agree with the documentation.  */
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#ifndef __TRACEBACK__
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#define __TRACEBACK__
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#define TB_C 0U                 /* C */
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#define TB_FORTRAN 1U           /* FORTRAN */
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#define TB_PASCAL 2U            /* Pascal */
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#define TB_ADA 3U               /* ADA */
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#define TB_PL1 4U               /* PL1 */
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#define TB_BASIC 5U             /* Basic */
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#define TB_LISP 6U              /* Lisp */
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#define TB_COBOL 7U             /* eCobol */
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#define TB_MODULA2 8U           /* Modula2 */
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#define TB_CPLUSPLUS 9U         /* C++ */
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#define TB_RPG 10U              /* RPG */
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#define TB_PL8 11U              /* PL8 */
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#define TB_ASM 12U              /* Asm */
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/* Flags 1.  */
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#define TB_GLOBALLINK 0x80U     /* Routine is Global Linkage.  */
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#define TB_is_eprol 0x40U       /* Out-of-line prolog or epilog routine.  */
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#define TB_HAS_TBOFF 0x20U      /* tb_offset set (extension field).  */
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#define TB_INT_PROC 0x10U       /* Internal leaf routine.  */
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#define TB_HAS_CTL 0x08U        /* Has controlled automatic storage.  */
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#define TB_TOCLESS 0X04U        /* Routine has no TOC.  */
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#define TB_FP_PRESENT 0x02U     /* Routine has floating point ops.  */ 
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#define TB_LOG_ABORT 0x01U      /* fp_present && log/abort compiler opt.  */
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/* Flags 2.  */
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#define TB_INT_HNDL 0x80U       /* Routine is an interrupt handler.  */
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#define TB_NAME_PRESENT 0x40U   /* Name_len/name set (extension field).  */
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#define TB_USES_ALLOCA 0x20U    /* Uses alloca() to allocate storage.  */
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#define TB_CL_DIS_inv 0x1CU     /* On-condition directives (see below).  */
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#define TB_SAVES_CR 0x02U       /* Routine saves the CR.  */
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#define TB_SAVES_LR 0x01U       /* Routine saves the LR.  */
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/* cl_dis_inv "on condition" settings:  */
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#define TB_CL_DIS_INV(x) (((x) & cl_dis_inv) >> 2U)
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#define TB_WALK_ONCOND 0U       /* Walk stack without restoring state.  */
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#define TB_DISCARD_ONCOND 1U    /* Walk stack and discard.  */
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#define TB_INVOKE_ONCOND 2U     /* Invoke a specific system routine.  */
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/* Flags 3.  */
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#define TB_STORES_BC 0x80U      /* Routine saves frame ptr of caller.  */
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#define TB_SPARE2 0X40U         /* Spare bit.  */
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#define TB_FPR_SAVED 0x3fU      /* Number of FPRs saved (max of 32).  */
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                                /* (Last reg saved is ALWAYS fpr31).  */
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#define TB_NUM_FPR_SAVED(x) ((x) & fpr_saved)
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/* Flags 4.  */
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#define TB_HAS_VEC_INFO 0x80U   /* Routine uses vectors.  */
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#define TB_SPARE3 0X40U         /* Spare bit.  */
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#define TB_GPR_SAVED 0x3fU      /* Number of GPRs saved (max of 32).  */
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                                /* (Last reg saved is ALWAYS gpr31).  */
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#define TB_NUM_GPR_SAVED(x) ((x) & gpr_saved)
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/* Flags 5.  */
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#define TB_FLOATPARAMS 0xfeU    /* Number of floating point parameters.  */
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#define TB_PARAMSONSTK 0X01U    /* All parameters are on the stack.  */
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#define TB_NUM_FLOATPARAMS(X) (((x) & floatparams) >> 1U)
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/* Traceback_table (fixed portion).  */
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struct traceback_table
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{
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  /* Traceback table layout (fixed portion):  */
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  unsigned char version;        /* Traceback format version.  */
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  unsigned char lang;           /* Language indicators:  */
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  unsigned char flags1;         /* Flag bits #1:  */
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  unsigned char flags2;         /* Flag bits #2:  */
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  unsigned char flags3;         /* Flag bits #3:  */
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  unsigned char flags4;         /* Flag bits #4:  */
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  unsigned char fixedparams;    /* Number of fixed point parameters.  */
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  unsigned char flags5;         /* Flag bits #5:  */
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};
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/* traceback_table (optional) extensions.  */
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/* Optional portions exist independently in the order presented below,
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   not as a structure or a union. Whether or not portions exist is
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   determinable from bit-fields within the fixed portion above.  */
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/* The following is present only if fixedparams or floatparams are non
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   zero and it immediately follows the fixed portion of the traceback
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   table...  */
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/* Order and type encoding of parameters:  */
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struct traceback_table_fixedparams
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{
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  unsigned long paraminfo;
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};
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/* Left-justified bit-encoding as follows:  */
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#define FIXED_PARAM 0           /* '0'  ==> fixed param (1 gpr or word).  */
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#define SPFP_PARAM 2            /* '10' ==> single-precision float param.  */
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#define DPFP_PARAM 3            /* '11' ==> double-precision float param.  */
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#define PARAM_ENCODING(x, bit) /* Yields xxx_PARAM as a function of "bit".  */          \
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 ((((x)&(1UL<<(31UL-(bit++))))==0UL) /* Values 0:31 (left-to-right). "bit" is */        \
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 ? FIXED_PARAM /* an L-value that's left incremented to */                              \
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 : ((((x)&(1UL<<(31UL-(bit++))))==0)/* the next bit position for the next */             \
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 ? SPFP_PARAM /* parameter.  This will be 1 or 2 bit */                                 \
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 : DPFP_PARAM)) /* positions later.  */
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/* The following is present only if has_tboff (in flags1) in fixed part is present...  */
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/* Offset from start of code to TracebackTbl.  */
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struct traceback_table_tboff
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{
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  unsigned long tb_offset;
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};
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/* The following is present only if int_hndl (in flags2) in fixed part is present ...  */
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/* What interrupts are handled by the routine.  */
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struct traceback_table_interrupts
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{
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  long hand_mask;
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};
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/* The following are present only if has_ctl (in flags1) in fixed part is present...  */
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/* Controlled automatic storage info:  */
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struct traceback_table_anchors
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{
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  unsigned long ctl_info;       /* Number of controlled automatic anchors.  */
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  long ctl_info_disp[1];        /* Array of stack displacements where each.  */
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};                              /* Anchor is located (array STARTS here).  */
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/* The following are present only if name_present (in flags2) in fixed
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   part is present...  */
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/* Routine name:  */
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struct traceback_table_routine
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{
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  unsigned short name_len;      /* Length of name that follows.  */
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  char name[1];                 /* Name starts here (NOT null terminated).  */
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};
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/* The following are present only if uses_alloca (in flags2) in fixed
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   part is present...  */
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/* Register auto storage when alloca() is used.  */
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struct traceback_table_alloca
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{
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  char alloca_reg;
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};
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/* The following are present only if has_vec_info (in flags4) in fixed
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   part is present...  */
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/* Vector info:  */
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struct traceback_table_vector
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{
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  unsigned char vec_flags1;     /* Vec info bits #1:  */
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#define TB_VR_SAVED 0xFCU       /* Number of saved vector registers.  */
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#define TB_SAVES_VRSAVE 0x02U   /* Saves VRsave.  */
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#define TB_HAS_VARARGS 0x01U    /* Routine has a variable argument list.  */
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#define TB_NUM_VR_SAVED(x) (((x) & TB_VR_SAVED) >> 2U)
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  unsigned char vec_flags2;     /* Vec info bits #2:  */
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#define TB_VECTORPARAMS 0xfeU   /* Number of vector parameters.  */
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#define TB_VEC_PRESENT 0x01U    /* Routine uses at least one vec instr.  */
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#define VECPARAMS(x) (((x) & TB_VECTORPARAMS) >> 1U)
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};
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#endif

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