dwarfget.c File Reference

#include <precomp.h>
#include <debug.h>

Include dependency graph for dwarfget.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
ulong	dwarfget1 (DwarfBuf *b)
int	dwarfgetn (DwarfBuf *b, uchar *a, int n)
uchar *	dwarfgetnref (DwarfBuf *b, ulong n)
char *	dwarfgetstring (DwarfBuf *b)
void	dwarfskip (DwarfBuf *b, int n)
ulong	dwarfget2 (DwarfBuf *b)
ulong	dwarfget4 (DwarfBuf *b)
uvlong	dwarfget8 (DwarfBuf *b)
ulong	dwarfgetaddr (DwarfBuf *b)
ulong	dwarfget128 (DwarfBuf *b)
long	dwarfget128s (DwarfBuf *b)

Variables
int	n1
int	n2
int	n3
int	n4
int	n5

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 7 of file dwarfget.c.

Function Documentation

dwarfget1()

ulong dwarfget1

(

DwarfBuf *

b

)

Definition at line 11 of file dwarfget.c.

{
    if(b->p==nil || b->p+1 > b->ep){
        b->p = nil;
        return 0;
    }
    return *b->p++;
}

Referenced by constblock(), dexec(), dwarfaddrtounit(), dwarfenumunit(), dwarfgetarg(), dwarfpctoline(), findfde(), getblock(), getuchar(), getulong(), and parseabbrevs().

dwarfget128()

ulong dwarfget128

(

DwarfBuf *

b

)

Definition at line 146 of file dwarfget.c.

{
    static int nbad;
    ulong c, d;
 
    if(b->p == nil)
        return 0;
    c = *b->p++;
    if(!(c&0x80))
{n1++;
        return c;
}
    c &= ~0x80;
    d = *b->p++;
    c |= (d&0x7F)<<7;
    if(!(d&0x80))
{n2++;
        return c;
}
    d = *b->p++;
    c |= (d&0x7F)<<14;
    if(!(d&0x80))
{n3++;
        return c;
}
    d = *b->p++;
    c |= (d&0x7F)<<21;
    if(!(d&0x80))
{n4++;
        return c;
}
    d = *b->p++;
    c |= (d&0x7F)<<28;
    if(!(d&0x80))
{n5++;
        return c;
}
    while(b->p<b->ep && *b->p&0x80)
        b->p++;
    if(++nbad == 1)
        werrstr("dwarf: overflow during parsing of uleb128 integer");
    return c;
}

Referenced by constblock(), dexec(), dwarfgetarg(), dwarfnextsym(), dwarfpctoline(), findfde(), getblock(), getulong(), parseabbrevs(), and parseattrs().

dwarfget128s()

long dwarfget128s

(

DwarfBuf *

b

)

Definition at line 191 of file dwarfget.c.

{
    int nb, c;
    ulong v;
    static int nbad;
 
    v = 0;
    nb = 0;
    if(b->p==nil)
        return 0;
    while(b->p<b->ep){
        c = *b->p++;
        v |= (c & 0x7F)<<nb;
        nb += 7;
        if(!(c&0x80))
            break;
    }
    if(v&(1<<(nb-1)))
        v |= ~(((ulong)1<<nb)-1);
    if(nb > 8*sizeof(ulong)){
        if(0)
        if(++nbad == 1)
            werrstr("dwarf: overflow during parsing of sleb128 integer: got %d bits", nb);
    }
    return v;
}

Referenced by constblock(), dexec(), dwarfgetarg(), dwarfpctoline(), findfde(), and getulong().

dwarfget2()

ulong dwarfget2

(

DwarfBuf *

b

)

Definition at line 75 of file dwarfget.c.

{
    ulong v;
 
    if(b->p==nil || b->p+2 > b->ep){
        b->p = nil;
        return 0;
    }
    v = b->d->pe->e2(b->p);
    b->p += 2;
    return v;
}

Referenced by _dwarfnametounit(), constblock(), dexec(), dwarfaddrtounit(), dwarfargvalue(), dwarfenumunit(), dwarfgetarg(), dwarfpctoline(), getblock(), and getulong().

dwarfget4()

ulong dwarfget4

(

DwarfBuf *

b

)

Definition at line 89 of file dwarfget.c.

{
    ulong v;
 
    if(b->p==nil || b->p+4 > b->ep){
        b->p = nil;
        return 0;
    }
    v = b->d->pe->e4(b->p);
    b->p += 4;
    return v;
}

Referenced by _dwarfnametounit(), constblock(), dexec(), dwarfaddrtounit(), dwarfargvalue(), dwarfenumunit(), dwarfgetarg(), dwarfpctoline(), findfde(), getblock(), getstring(), and getulong().

dwarfget8()

uvlong dwarfget8

(

DwarfBuf *

b

)

Definition at line 103 of file dwarfget.c.

{
    uvlong v;
 
    if(b->p==nil || b->p+8 > b->ep){
        b->p = nil;
        return 0;
    }
    v = b->d->pe->e8(b->p);
    b->p += 8;
    return v;
}

Referenced by constblock(), and getulong().

dwarfgetaddr()

ulong dwarfgetaddr

(

DwarfBuf *

b

)

Definition at line 117 of file dwarfget.c.

{
    static int nbad;
 
    if(b->addrsize == 0)
        b->addrsize = b->d->addrsize;
 
    switch(b->addrsize){
    case 1:
        return dwarfget1(b);
    case 2:
        return dwarfget2(b);
    case 4:
        return dwarfget4(b);
    case 8:
        return dwarfget8(b);
    default:
        if(++nbad == 1)
            werrstr("dwarf: unexpected address size %lud in dwarfgetaddr", b->addrsize);
        b->p = nil;
        return 0;
    }
}

Referenced by constblock(), dexec(), dwarfaddrtounit(), dwarfpctoline(), findfde(), and getulong().

dwarfgetn()

int dwarfgetn	(	DwarfBuf *	b,
		uchar *	a,
		int	n
	)

Definition at line 21 of file dwarfget.c.

{
    if(b->p==nil || b->p+n > b->ep){
        b->p = nil;
        memset(a, 0, n);
        return -1;
    }
    memmove(a, b->p, n);
    b->p += n;
    return 0;
}

dwarfgetnref()

uchar * dwarfgetnref	(	DwarfBuf *	b,
		ulong	n
	)

Definition at line 34 of file dwarfget.c.

{
    uchar *p;
 
    if(b->p==nil || b->p+n > b->ep){
        b->p = nil;
        return nil;
    }
    p = b->p;
    b->p += n;
    return p;
}

Referenced by dexec(), dwarfpctoline(), and getblock().

dwarfgetstring()

char * dwarfgetstring

(

DwarfBuf *

b

)

Definition at line 48 of file dwarfget.c.

{
    char *s;
 
    if(b->p == nil)
        return nil;
    s = (char*)b->p;
    while(b->p < b->ep && *b->p)
        b->p++;
    if(b->p >= b->ep){
        b->p = nil;
        return nil;
    }
    b->p++;
    return s;
}

Referenced by _dwarfnametounit(), dwarfpctoline(), findfde(), and getstring().

dwarfskip()

void dwarfskip	(	DwarfBuf *	b,
		int	n
	)

Definition at line 66 of file dwarfget.c.

{
    if(b->p==nil || b->p+n > b->ep)
        b->p = nil;
    else
        b->p += n;
}

Variable Documentation

n1

int n1

Definition at line 141 of file dwarfget.c.

n2

int n2

Definition at line 141 of file dwarfget.c.

n3

int n3

Definition at line 141 of file dwarfget.c.

n4

int n4

Definition at line 141 of file dwarfget.c.

n5

int n5

Definition at line 141 of file dwarfget.c.