From: Christophe Lyon
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/
* config/arm/arm.opt: Add -mfdpic option.
Change-Id: Ie5c4ed7434488933de6133186da09cd3ea1291a7
diff --git a/gcc/config/arm/arm.opt b/gcc/config/arm/arm.opt
index a1286a4..231c1cb 100644
--- a/gcc/c
From: Christophe Lyon
The new arm-uclinuxfdpiceabi target behaves pretty much like
arm-linux-gnueabi. In order the enable the same set of features, we
have to update several configure scripts that generally match targets
like *-*-linux*: in most places, we add *-uclinux* where there is
already *-
]
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=f1ac0afe481e83c9a33f247b81fa7de789edc4d9
[5]
https://git.qemu.org/?p=qemu.git;a=commit;h=e8fa72957419c11984608062c7dcb204a6003a06
[6]
https://git.linaro.org/people/christophe.lyon/uclibc.git/log/?h=uClibc-0.9.33.2
From: Christophe Lyon
In FDPIC mode, we set -fPIE unless the user provides -fno-PIE, -fpie,
-fPIC or -fpic: indeed FDPIC code is PIC, but we want to generate code
for executables rather than shared libraries by default.
We also make sure to use the --fdpic assembler option, and select the
approp
From: Christophe Lyon
The FDPIC register is hard-coded to r9, as defined in the ABI.
We have to disable tailcall optimizations if we don't know if the
target function is in the same module. If not, we have to set r9 to
the value associated with the target module.
When generating a symbol addres
From: Christophe Lyon
In FDPIC, we need to make sure __do_global_dtors_aux and frame_dummy
are referenced by their address, not by pointers to the function
descriptors.
2018-XX-XX Christophe Lyon
Mickaël Guêné
* libgcc/crtstuff.c: Add support for FDPIC.
Change-Id: Iff3aec38
From: Christophe Lyon
The main difference with existing support is that function addresses
are function descriptor addresses instead. This means that all code
dealing with function pointers now has to cope with function
descriptors instead.
For the same reason, Linux kernel helpers can no longer
From: Christophe Lyon
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/
* config/arm/arm.c (arm_compute_save_reg0_reg12_mask): Handle
FDPIC.
(thumb1_compute_save_core_reg_mask): Likewise.
Change-Id: Ib534cf91704cdc740867b46a8fe45fda27894562
diff --git a/
From: Christophe Lyon
Use local binding rules to decide whether we can use GOTOFFFUNCDESC to
compute the function address.
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/
* config/arm/arm.c (arm_local_funcdesc_p): New function.
(legitimize_pic_address): Ensure
From: Christophe Lyon
In FDPIC mode, the trampoline generated to support pointers to nested
functions looks like:
.wordtrampoline address
.wordtrampoline GOT address
ldr r12, [pc, #8]
ldr r9, [pc, #8]
ldr
From: Christophe Lyon
Support additional relocations: TLS_GD32_FDPIC, TLS_LDM32_FDPIC, and
TLS_IE32_FDPIC.
We do not support the GNU2 TLS dialect.
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/
* config/arm/arm.c (tls_reloc): Add TLS_GD32_FDPIC,
TLS_LDM32_FDP
From: Christophe Lyon
2018-XX-XX Christophe Lyon
Mickaël Guêné
libgcc/
* unwind-arm-common.inc (ARM_SET_R7_RT_SIGRETURN)
(THUMB2_SET_R7_RT_SIGRETURN, FDPIC_LDR_R12_WITH_FUNCDESC)
(FDPIC_LDR_R9_WITH_GOT, FDPIC_LDR_PC_WITH_RESTORER)
(FDPIC_FUNCDE
From: Christophe Lyon
We call __aeabi_read_tp() to get the thread pointer. Since this is a
function call, we have to restore the FDPIC register afterwards.
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/
* config/arm/arm.c (arm_load_tp): Add FDPIC support.
* co
From: Christophe Lyon
Several tests cannot work on ARM-FDPIC for various reasons: skip them,
or skip some directives.
gcc.dg/20020312-2.c: Skip since it forces -fno-pic.
gcc.target/arm/:
* Skip since r9 is clobbered by assembly code:
20051215-1.c
mmx-1.c
pr61948.c
pr77933-1.c
pr77933-
From: Christophe Lyon
Without this, when we are unwinding across a signal frame we can jump
to an even address which leads to an exception.
This is needed in __gnu_persnality_sigframe_fdpic() when restoring the
PC from the signal frame since the PC saved by the kernel has the LSB
bit set to zero
From: Christophe Lyon
In FDPIC mode, r9 is saved in addition to other registers, so update
the expected patterns accordingly.
2018-XX-XX Christophe Lyon
Mickaël Guêné
* gcc/testsuite/
* gcc.target/arm/interrupt-1.c: Add scan-assembler pattern for
arm*-*-uclin
From: Christophe Lyon
v6-M and v8-M are not supported currently in FDPIC mode, it's better
to skip the tests.
2018-XX-XX Christophe Lyon
Mickaël Guêné
gcc/testsuite/
* gcc.target/arm/atomic-comp-swap-release-acquire-3.c: Skip on
arm*-*-uclinuxfdpiceabi.
From: Christophe Lyon
Some tests fail on arm*-*-uclinuxfdpiceabi because it generates PIC
code and they don't support it: skip them. They also fail on
arm*-linux* when forcing -fPIC.
2018-XX-XX Christophe Lyon
gcc/testsuite/
* gcc.target/arm/eliminate.c: Accept only nonpic ta
From: Christophe Lyon
Add *-*-uclinux* to tests that work on this target.
2018-XX-XX Christophe Lyon
gcc/testsuite/
* g++.dg/abi/forced.C: Add *-*-uclinux*.
* g++.dg/abi/guard2.C: Likewise.
* g++.dg/ext/cleanup-10.C: Likewise.
* g++.dg/ext/cleanup-11.C
From: Christophe Lyon
Some tests have the "nonpic" guard, but pass on
arm*-*-uclinuxfdpiceabi because it is in PIE mode by default. Rather
than adding this target to all these tests, add the "pie_enabled"
effective target.
2018-XX-XX Christophe Lyon
gcc/testsuite/
* g++.dg/cp
From: Christophe Lyon
uclibc defines bswap_32, so use a different name in this test.
2018-XX-XX Christophe Lyon
gcc/testsuite/
* gcc.target/arm/pr43698.c (bswap_32): Rename as my_bswap_32.
Change-Id: I2591bd911030814331cabf97ee5cf6cf8124b4f3
diff --git a/gcc/testsuite/gcc.t
From: Christophe Lyon
Since FDPIC requires an architecture >=7, these tests fail because
they enforce and older version. They would pass if the compiler didn't
bail out though.
2018-07-13 Christophe Lyon
* gcc.target/arm/armv6-unaligned-load-ice.c: Add arm_arch
effective-targ
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