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Add per-function commentary.

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From-SVN: r42003
This commit is contained in:
Richard Henderson 2001-05-12 11:42:45 -07:00
parent a3eaca15d9
commit c9ec8f321f
1 changed files with 22 additions and 0 deletions
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22
gcc/unwind-pe.h
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@ -42,6 +42,11 @@
#define DW_EH_PE_funcrel 0x40
#define DW_EH_PE_indirect 0x80
/* Given an encoding, return the number of bytes the format occupies.
This is only defined for fixed-size encodings, and so does not
include leb128. */
static unsigned int
size_of_encoded_value (unsigned char encoding)
@ -63,6 +68,11 @@ size_of_encoded_value (unsigned char encoding)
abort ();
}
/* Given an encoding and an _Unwind_Context, return the base to which
the encoding is relative. This base may then be passed to
read_encoded_value_with_base for use when the _Unwind_Context is
not available. */
static _Unwind_Ptr
base_of_encoded_value (unsigned char encoding, _Unwind_Context *context)
{
@ -85,6 +95,10 @@ base_of_encoded_value (unsigned char encoding, _Unwind_Context *context)
abort ();
}
/* Load an encoded value from memory at P. The value is returned in VAL;
The function returns P incremented past the value. BASE is as given
by base_of_encoded_value for this encoding in the appropriate context. */
static const unsigned char *
read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
const unsigned char *p, _Unwind_Ptr *val)
@ -186,6 +200,9 @@ read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
return p;
}
/* Like read_encoded_value_with_base, but get the base from the context
rather than providing it directly. */
static inline const unsigned char *
read_encoded_value (_Unwind_Context *context, unsigned char encoding,
const unsigned char *p, _Unwind_Ptr *val)
@ -195,12 +212,17 @@ read_encoded_value (_Unwind_Context *context, unsigned char encoding,
p, val);
}
/* Read an unsigned leb128 value from P, store the value in VAL, return
P incremented past the value. */
static inline const unsigned char *
read_uleb128 (const unsigned char *p, _Unwind_Ptr *val)
{
return read_encoded_value_with_base (DW_EH_PE_uleb128, 0, p, val);
}
/* Similar, but read a signed leb128 value. */
static inline const unsigned char *
read_sleb128 (const unsigned char *p, _Unwind_Ptr *val)
{