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void-packages/srcpkgs/ghc/patches/ppc64-be-elfv2.patch
q66 8a027b98f7 ghc: initial patches for ppc64 elfv2 
but ghc seems otherwise kinda broken on big endian, so we will
need more fixes...
2021-01-09 19:26:24 +01:00

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From fd191973558cf4aeb0d5ca107357defd6f837c38 Mon Sep 17 00:00:00 2001
From: Daniel Kolesa <daniel@octaforge.org>
Date: Tue, 5 Jan 2021 04:10:25 +0100
Subject: [PATCH] fix up runtime for ppc64 BE ELFv2 + ensure it's used
---
aclocal.m4 | 2 +-
configure | 2 +-
libraries/ghci/GHCi/InfoTable.hsc | 36 ++++++++++++-------------------
rts/Adjustor.c | 12 +++++------
rts/AdjustorAsm.S | 2 +-
rts/StgCRun.c | 4 ++--
rts/StgCRunAsm.S | 2 +-
7 files changed, 26 insertions(+), 34 deletions(-)
diff --git a/aclocal.m4 b/aclocal.m4
index 41cecf0..ba08bd2 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -190,7 +190,7 @@ AC_DEFUN([FPTOOLS_SET_HASKELL_PLATFORM_VARS],
test -z "[$]2" || eval "[$]2=ArchPPC"
;;
powerpc64)
- test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V1}\""
+ test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
;;
powerpc64le)
test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
diff --git a/configure b/configure
index 183e661..8aae1bc 100755
--- a/configure
+++ b/configure
@@ -9868,7 +9868,7 @@ $as_echo "done" >&6; }
test -z "$2" || eval "$2=ArchPPC"
;;
powerpc64)
- test -z "$2" || eval "$2=\"ArchPPC_64 {ppc_64ABI = ELF_V1}\""
+ test -z "$2" || eval "$2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
;;
powerpc64le)
test -z "$2" || eval "$2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
diff --git a/libraries/ghci/GHCi/InfoTable.hsc b/libraries/ghci/GHCi/InfoTable.hsc
index ec3c18a..0359be7 100644
--- a/libraries/ghci/GHCi/InfoTable.hsc
+++ b/libraries/ghci/GHCi/InfoTable.hsc
@@ -228,30 +228,22 @@ mkJumpToAddr a = case platform of
, fromIntegral w64
, fromIntegral (w64 `shiftR` 32) ]
ArchPPC64 ->
- -- We use the compiler's register r12 to read the function
- -- descriptor and the linker's register r11 as a temporary
- -- register to hold the function entry point.
- -- In the medium code model the function descriptor
- -- is located in the first two gigabytes, i.e. the address
- -- of the function pointer is a non-negative 32 bit number.
- -- 0x0EADBEEF stands for the address of the function pointer:
- -- 0: 3d 80 0e ad lis r12,0x0EAD
- -- 4: 61 8c be ef ori r12,r12,0xBEEF
- -- 8: e9 6c 00 00 ld r11,0(r12)
- -- c: e8 4c 00 08 ld r2,8(r12)
- -- 10: 7d 69 03 a6 mtctr r11
- -- 14: e9 6c 00 10 ld r11,16(r12)
- -- 18: 4e 80 04 20 bctr
- let w32 = fromIntegral (funPtrToInt a)
+ -- The ABI requires r12 to point to the function's entry point.
+ -- We use the medium code model where code resides in the first
+ -- two gigabytes, so loading a non-negative32 bit address
+ -- with lis followed by ori is fine.
+ -- 0x0EADBEEF stands for the address:
+ -- 3D800EAD lis r12,0x0EAD
+ -- 618CBEEF ori r12,r12,0xBEEF
+ -- 7D8903A6 mtctr r12
+ -- 4E800420 bctr
+
+ let w32 = fromIntegral (funPtrToInt a)
hi16 x = (x `shiftR` 16) .&. 0xFFFF
lo16 x = x .&. 0xFFFF
- in Right [ 0x3D800000 .|. hi16 w32,
- 0x618C0000 .|. lo16 w32,
- 0xE96C0000,
- 0xE84C0008,
- 0x7D6903A6,
- 0xE96C0010,
- 0x4E800420]
+ in Right [ 0x3D800000 .|. hi16 w32,
+ 0x618C0000 .|. lo16 w32,
+ 0x7D8903A6, 0x4E800420 ]
ArchPPC64LE ->
-- The ABI requires r12 to point to the function's entry point.
diff --git a/rts/Adjustor.c b/rts/Adjustor.c
index d360cfe..ab7ede7 100644
--- a/rts/Adjustor.c
+++ b/rts/Adjustor.c
@@ -49,7 +49,7 @@ Haskell side.
#if defined(i386_HOST_ARCH)
extern void adjustorCode(void);
-#elif defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#elif defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
// from AdjustorAsm.s
// not declared as a function so that AIX-style
// fundescs can never get in the way.
@@ -278,7 +278,7 @@ __asm__("obscure_ccall_ret_code:\n\t"
extern void obscure_ccall_ret_code(void);
#endif
-#if defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#if defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
#if !(defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS))
/* !!! !!! WARNING: !!! !!!
@@ -318,7 +318,7 @@ typedef struct AdjustorStub {
} AdjustorStub;
#endif
-#if defined(i386_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#if defined(i386_HOST_ARCH) || defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
static int totalArgumentSize(char *typeString)
{
int sz = 0;
@@ -351,7 +351,7 @@ void*
createAdjustor(int cconv, StgStablePtr hptr,
StgFunPtr wptr,
char *typeString
-#if !defined(powerpc_HOST_ARCH) && !defined(powerpc64_HOST_ARCH) && !defined(x86_64_HOST_ARCH)
+#if !defined(powerpc_HOST_ARCH) && (!defined(powerpc64_HOST_ARCH) || (_CALL_ELF == 2)) && !defined(x86_64_HOST_ARCH)
STG_UNUSED
#endif
)
@@ -1007,7 +1007,7 @@ TODO: Depending on how much allocation overhead stgMallocBytes uses for
}
}
-#elif defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#elif defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
#define OP_LO(op,lo) ((((unsigned)(op)) << 16) | (((unsigned)(lo)) & 0xFFFF))
#define OP_HI(op,hi) ((((unsigned)(op)) << 16) | (((unsigned)(hi)) >> 16))
@@ -1271,7 +1271,7 @@ freeHaskellFunctionPtr(void* ptr)
return;
}
freeStablePtr(((StgStablePtr*)ptr)[1]);
-#elif defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#elif defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
if ( ((AdjustorStub*)ptr)->code != (StgFunPtr) &adjustorCode ) {
errorBelch("freeHaskellFunctionPtr: not for me, guv! %p\n", ptr);
return;
diff --git a/rts/AdjustorAsm.S b/rts/AdjustorAsm.S
index 2795b83..63cfe91 100644
--- a/rts/AdjustorAsm.S
+++ b/rts/AdjustorAsm.S
@@ -2,7 +2,7 @@
/* ******************************** PowerPC ******************************** */
-#if defined(powerpc_HOST_ARCH) || defined(powerpc64_HOST_ARCH)
+#if defined(powerpc_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2))
#if !(defined(powerpc_HOST_ARCH) && defined(linux_HOST_OS))
/* The following code applies, with some differences,
to all powerpc platforms except for powerpc32-linux,
diff --git a/rts/StgCRun.c b/rts/StgCRun.c
index 934926e..2ff8662 100644
--- a/rts/StgCRun.c
+++ b/rts/StgCRun.c
@@ -717,7 +717,7 @@ StgRunIsImplementedInAssembler(void)
Everything is in assembler, so we don't have to deal with GCC...
-------------------------------------------------------------------------- */
-#if defined(powerpc64_HOST_ARCH)
+#if defined(powerpc64_HOST_ARCH) && (_CALL_ELF != 2)
static void GNUC3_ATTRIBUTE(used)
StgRunIsImplementedInAssembler(void)
@@ -842,7 +842,7 @@ StgRunIsImplementedInAssembler(void)
#endif
-#if defined(powerpc64le_HOST_ARCH)
+#if defined(powerpc64le_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF == 2))
/* -----------------------------------------------------------------------------
PowerPC 64 little endian architecture
diff --git a/rts/StgCRunAsm.S b/rts/StgCRunAsm.S
index 9274a44..3b4fc33 100644
--- a/rts/StgCRunAsm.S
+++ b/rts/StgCRunAsm.S
@@ -1,7 +1,7 @@
#include "ghcconfig.h"
#include "rts/Constants.h"
-#if defined(powerpc64le_HOST_ARCH)
+#if defined(powerpc64le_HOST_ARCH) || (defined(powerpc64_HOST_ARCH) && (_CALL_ELF == 2))
# ifdef linux_HOST_OS
# define STACK_FRAME_SIZE RESERVED_C_STACK_BYTES+304
.file "StgCRun.c"
--
2.30.0
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