* Fix PART of issue 17192 for 3.4 - reapply the issue11729 patch
that was undone in the merge fun from upstream which already had it in 3.0.13. * Add the missing update to libffi.info.
This commit is contained in:
Gregory P. Smith
commit
6897267759
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@ -14505,10 +14505,10 @@ if ${libffi_cv_as_x86_pcrel+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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libffi_cv_as_x86_pcrel=yes
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echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
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if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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libffi_cv_as_x86_pcrel=no
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echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
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if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
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libffi_cv_as_x86_pcrel=yes
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fi
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fi
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@ -367,10 +367,10 @@ fi
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if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
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AC_CACHE_CHECK([assembler supports pc related relocs],
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libffi_cv_as_x86_pcrel, [
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libffi_cv_as_x86_pcrel=yes
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echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
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if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
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libffi_cv_as_x86_pcrel=no
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echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
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if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
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libffi_cv_as_x86_pcrel=yes
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fi
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])
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if test "x$libffi_cv_as_x86_pcrel" = xyes; then
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@ -4,7 +4,7 @@ from ../libffi/doc/libffi.texi.
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This manual is for Libffi, a portable foreign-function interface
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library.
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Copyright (C) 2008, 2010 Red Hat, Inc.
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Copyright (C) 2008, 2010, 2011 Red Hat, Inc.
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Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU General Public License as
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@ -27,7 +27,7 @@ libffi
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This manual is for Libffi, a portable foreign-function interface
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library.
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Copyright (C) 2008, 2010 Red Hat, Inc.
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Copyright (C) 2008, 2010, 2011 Red Hat, Inc.
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Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU General Public License as
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@ -115,8 +115,6 @@ To prepare a call interface object, use the function `ffi_prep_cif'.
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want. *note Multiple ABIs:: for more information.
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NARGS is the number of arguments that this function accepts.
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`libffi' does not yet handle varargs functions; see *note Missing
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Features:: for more information.
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RTYPE is a pointer to an `ffi_type' structure that describes the
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return type of the function. *Note Types::.
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@ -129,6 +127,30 @@ To prepare a call interface object, use the function `ffi_prep_cif'.
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properly; `FFI_BAD_TYPEDEF' if one of the `ffi_type' objects is
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incorrect; or `FFI_BAD_ABI' if the ABI parameter is invalid.
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If the function being called is variadic (varargs) then
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`ffi_prep_cif_var' must be used instead of `ffi_prep_cif'.
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-- Function: ffi_status ffi_prep_cif_var (ffi_cif *CIF, ffi_abi
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varabi, unsigned int NFIXEDARGS, unsigned int varntotalargs,
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ffi_type *RTYPE, ffi_type **ARGTYPES)
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This initializes CIF according to the given parameters for a call
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to a variadic function. In general it's operation is the same as
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for `ffi_prep_cif' except that:
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NFIXEDARGS is the number of fixed arguments, prior to any variadic
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arguments. It must be greater than zero.
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NTOTALARGS the total number of arguments, including variadic and
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fixed arguments.
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Note that, different cif's must be prepped for calls to the same
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function when different numbers of arguments are passed.
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Also note that a call to `ffi_prep_cif_var' with
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NFIXEDARGS=NOTOTALARGS is NOT equivalent to a call to
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`ffi_prep_cif'.
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To call a function using an initialized `ffi_cif', use the
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`ffi_call' function:
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@ -147,7 +169,9 @@ To prepare a call interface object, use the function `ffi_prep_cif'.
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AVALUES is a vector of `void *' pointers that point to the memory
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locations holding the argument values for a call. If CIF declares
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that the function has no arguments (i.e., NARGS was 0), then
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AVALUES is ignored.
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AVALUES is ignored. Note that argument values may be modified by
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the callee (for instance, structs passed by value); the burden of
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copying pass-by-value arguments is placed on the caller.
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File: libffi.info, Node: Simple Example, Next: Types, Prev: The Basics, Up: Using libffi
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@ -294,7 +318,7 @@ is perfectly happy passing structures back and forth. You must first
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describe the structure to `libffi' by creating a new `ffi_type' object
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for it.
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-- ffi_type:
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-- Data type: ffi_type
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The `ffi_type' has the following members:
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`size_t size'
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This is set by `libffi'; you should initialize it to zero.
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@ -509,9 +533,7 @@ File: libffi.info, Node: Missing Features, Next: Index, Prev: Using libffi,
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`libffi' is missing a few features. We welcome patches to add support
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for these.
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* There is no support for calling varargs functions. This may work
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on some platforms, depending on how the ABI is defined, but it is
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not reliable.
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* Variadic closures.
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* There is no support for bit fields in structures.
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@ -519,6 +541,9 @@ for these.
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* The "raw" API is undocumented.
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Note that variadic support is very new and tested on a relatively
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small number of platforms.
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File: libffi.info, Node: Index, Prev: Missing Features, Up: Top
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@ -528,7 +553,6 @@ Index
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[index ]
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* Menu:
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* : Structures. (line 12)
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* ABI: Introduction. (line 13)
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* Application Binary Interface: Introduction. (line 13)
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* calling convention: Introduction. (line 13)
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@ -536,11 +560,12 @@ Index
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* closure API: The Closure API. (line 13)
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* closures: The Closure API. (line 13)
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* FFI: Introduction. (line 31)
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* ffi_call: The Basics. (line 41)
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* ffi_closure_alloca: The Closure API. (line 19)
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* ffi_call: The Basics. (line 63)
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* ffi_closure_alloc: The Closure API. (line 19)
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* ffi_closure_free: The Closure API. (line 26)
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* FFI_CLOSURES: The Closure API. (line 13)
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* ffi_prep_cif: The Basics. (line 16)
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* ffi_prep_cif_var: The Basics. (line 39)
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* ffi_prep_closure_loc: The Closure API. (line 34)
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* ffi_status <1>: The Closure API. (line 37)
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* ffi_status: The Basics. (line 18)
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@ -568,24 +593,24 @@ Index
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* ffi_type_void: Primitive Types. (line 10)
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* Foreign Function Interface: Introduction. (line 31)
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* void <1>: The Closure API. (line 20)
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* void: The Basics. (line 43)
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* void: The Basics. (line 65)
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Tag Table:
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Node: Top706
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Node: Introduction1448
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Node: Using libffi3084
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Node: The Basics3570
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Node: Simple Example6177
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Node: Types7204
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Node: Primitive Types7487
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Node: Structures9307
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Node: Type Example10167
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Node: Multiple ABIs11390
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Node: The Closure API11761
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Node: Closure Example14705
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Node: Missing Features16264
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Node: Index16757
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Node: Top712
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Node: Introduction1460
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Node: Using libffi3096
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Node: The Basics3582
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Node: Simple Example7224
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Node: Types8251
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Node: Primitive Types8534
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Node: Structures10354
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Node: Type Example11224
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Node: Multiple ABIs12447
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Node: The Closure API12818
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Node: Closure Example15762
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Node: Missing Features17321
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Node: Index17774
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End Tag Table
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