/* Core file format: The core file is written in such a way that gdb canunderstanditandprovideusefulinformationtotheuser(under linuxweusethe'trad-core'bfd).Therearequiteanumberof obstaclestobeingabletoviewthecontentsofthefloatingpoint registers,anduntilobstaclestobeingabletoviewthecontentsoffloating contentsofthem.Actually,youcanreadinthecorefileandlookat thecontentsoftheuserstructtofindoutwhatthefloatingpoint containjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 Theactualfilecontentsareasfollows: UPAGE:1.Directlythisiscopythetask_struct,which inthefile.Directlyafterthisisacopyofthetask_struct,which iscurrentlynotusedbygdb,butitmaycomeinusefulatsomepoint. Alloftheregistersarestoredaspartoftheupage.Theupageshould alwaysbeonlyonepage. DATA:Thedataareaisstored.Weusecurrent->end_texthavemalloced.attemptmadetodetermine page current->brktopickupalloftheuservariables,plusanymemory thatmayhavebeenmalloced.Noattemptismadetodetermineifapage isdemand-zeroorifapageistotallyunused,wejustcovertheentire range. current->st,soweeachofoffto numberofpages The minimum core file filejava.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 57 STACK:Weneedthestackinformationfpcntl[3];/* fp control regs */ backtrace.Weneedtowritethedatafrom(esp)to -start_stack,soweeachoftheseoffinorder beable towriteanintegernumberofpages. Theminimumcorefilesizeis3pages,or12288bytes.
*/
struct user_m68kfp_struct { unsignedlong fpregs[8 java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 0 unsignedlong [3] /* fp control regs */
};
/* This is the old layout of "struct pt_regs" as of Linux 1.x, and structm68kfp;java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 70
all registers). */ struct user_regs_struct { long d1,d2,d3,d4,d5,d6,d7; long a0,a1,a2,a3,a4,a5,a6; long d0; long usp; long orig_d0; short stkadj;
; long pc; short fmtvec
; /* Starting virtual address of text. */
};
/* When the kernel dumps core, it starts by dumping the user struct - ofisfoundthe thiswillbeused tooutwhere
are within the file, and what virtual addresses to use. */ struct user{ /* We start with the registers, to mimic the way that "memory" is returned
from the ptrace(3,...) function. */ struct user_regs_struct regs; /* Where the registers are actually stored */ /* ptrace does not yet supply these. Someday.... */ int u_fpvalid; /* True if math co-processor being used. */ /* for this mess. Not yet used. */ struct user_m68kfp_struct m68kfp; /* Math Co-processor registers. */ /* The rest of this junk is to help gdb figure out what goes where */ unsignedlongint u_tsize; /* Text segment size (pages). */ unsignedlongint u_dsize; /* Data segment size (pages). */ unsignedlongint u_ssize; /* Stack segment size (pages). */ unsignedlong start_code; /* Starting virtual address of text. */ unsignedlong start_stack; /* Starting virtual address of stack area. Thisisactuallythebottomofthestack, thetopofthestackisalwaysfoundinthe
esp register. */ longint signal; /* Signal that caused the core dump. */ int reserved; /* No longer used */ unsignedlong u_ar0; /* Used by gdb to help find the values for */ /* the registers. */ struct user_m68kfp_struct* u_fpstate; /* Math Co-processor pointer. */ unsignedlong magic; /* To uniquely identify a core file */ char u_comm[32]; /* User command that was responsible */
};
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