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authorIan Lance Taylor <iant@google.com>2007-09-28 06:00:26 +0000
committerIan Lance Taylor <iant@google.com>2007-09-28 06:00:26 +0000
commitdfbba8f432b3e651241e00d13a5284db46692791 (patch)
tree9ccf3e2338d47990f7fa62428268814d8c9d0dd7 /gold/reloc.h
parent8be878263a7babecd270835a7be3b4567aec27ed (diff)
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From Andrew Chatham: add signedrel<>, rel32s and friends.
Diffstat (limited to 'gold/reloc.h')
-rw-r--r--gold/reloc.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/gold/reloc.h b/gold/reloc.h
index cc1149b..e69161d 100644
--- a/gold/reloc.h
+++ b/gold/reloc.h
@@ -192,6 +192,25 @@ private:
elfcpp::Swap<valsize, big_endian>::writeval(wv, x);
}
+ // Like rel(), but sign-extends the value to SIZE.
+ template<int valsize>
+ static inline void
+ signedrel(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval)
+ {
+ typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
+ typedef typename elfcpp::Swap<size, big_endian>::Valtype Sizetype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ // Fancy formula to sign-extend x to size.
+ const Sizetype mask = 1U << (sizeof(valsize) * 8 - 1);
+ Sizetype sign_extended_x = x;
+ sign_extended_x = (sign_extended_x ^ mask) - mask;
+ x = psymval->value(object, sign_extended_x);
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, x);
+ }
+
// Do a simple PC relative relocation with the addend in the section
// contents. VALSIZE is the size of the value.
template<int valsize>
@@ -238,6 +257,13 @@ public:
const Symbol_value<size>* psymval)
{ This::template rel<8>(view, object, psymval); }
+ // Do an 8-bit REL relocation, sign extending the addend to SIZE.
+ static inline void
+ rel8s(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval)
+ { This::template signedrel<8>(view, object, psymval); }
+
// Do a simple 8-bit PC relative relocation with the addend in the
// section contents.
static inline void
@@ -264,6 +290,13 @@ public:
const Symbol_value<size>* psymval)
{ This::template rel<16>(view, object, psymval); }
+ // Do a 16-bit REL relocation, sign extending the addend to SIZE.
+ static inline void
+ rel16s(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval)
+ { This::template signedrel<16>(view, object, psymval); }
+
// Do a simple 32-bit PC relative REL relocation with the addend in
// the section contents.
static inline void
@@ -290,6 +323,13 @@ public:
const Symbol_value<size>* psymval)
{ This::template rel<32>(view, object, psymval); }
+ // Do a 32-bit REL relocation, sign extending the addend to SIZE.
+ static inline void
+ rel32s(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval)
+ { This::template signedrel<32>(view, object, psymval); }
+
// Do a simple 32-bit PC relative REL relocation with the addend in
// the section contents.
static inline void