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Merge pull request #66 from ppizarro/master

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BlackFin fixes - Fatal error when calling a function defined in a shared library from within the function called by FFI
This commit is contained in:
Anthony Green
2014-02-28 00:56:27 -05:00
parent 64bd06990a 1a0b01e171
commit 860fe6646f
2 changed files with 23 additions and 20 deletions
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3
src/bfin/ffi.c
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@@ -1,5 +1,6 @@
/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 2012 Alexandre K. I. de Mendonca <alexandre.keunecke@gmail.com>
ffi.c - Copyright (c) 2012 Alexandre K. I. de Mendonca <alexandre.keunecke@gmail.com>,
Paulo Pizarro <paulo.pizarro@gmail.com>
Blackfin Foreign Function Interface

40
src/bfin/sysv.S
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@@ -1,5 +1,6 @@
/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2012 Alexandre K. I. de Mendonca <alexandre.keunecke@gmail.com>
sysv.S - Copyright (c) 2012 Alexandre K. I. de Mendonca <alexandre.keunecke@gmail.com>,
Paulo Pizarro <paulo.pizarro@gmail.com>
Blackfin Foreign Function Interface
@@ -40,25 +41,26 @@
.func ffi_call_SYSV
/*
cif->bytes = R0 (fp+8)
&ecif = R1 (fp+12)
ffi_prep_args = R2 (fp+16)
ret_type = stack (fp+20)
ecif.rvalue = stack (fp+24)
fn = stack (fp+28)
got (fp+32)
There is room for improvement here (we can use temporary registers
instead of saving the values in the memory)
REGS:
P5 => Stack pointer (function arguments)
R5 => cif->bytes
R4 => ret->type
cif->bytes = R0 (fp+8)
&ecif = R1 (fp+12)
ffi_prep_args = R2 (fp+16)
ret_type = stack (fp+20)
ecif.rvalue = stack (fp+24)
fn = stack (fp+28)
got (fp+32)
FP-20 = P3
FP-16 = SP (parameters area)
FP-12 = SP (temp)
FP-08 = function return part 1 [R0]
FP-04 = function return part 2 [R1]
There is room for improvement here (we can use temporary registers
instead of saving the values in the memory)
REGS:
P5 => Stack pointer (function arguments)
R5 => cif->bytes
R4 => ret->type
FP-20 = P3
FP-16 = SP (parameters area)
FP-12 = SP (temp)
FP-08 = function return part 1 [R0]
FP-04 = function return part 2 [R1]
*/
_ffi_call_SYSV: