From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
To: yanzhang.wang@intel.com, libc-alpha@sourceware.org
Cc: carlos@redhat.com, palmer@dabbelt.com
Subject: Re: [PATCH v2] RISC-V: Enable static-pie.
Date: Tue, 19 Dec 2023 14:44:08 -0300 [thread overview]
Message-ID: <98a131f9-b847-4e99-8ddd-01b3993d92b0@linaro.org> (raw)
In-Reply-To: <20230815014434.1902446-1-yanzhang.wang@intel.com>
On 14/08/23 22:44, yanzhang.wang--- via Libc-alpha wrote:
> From: Yanzhang Wang <yanzhang.wang@intel.com>
>
> This patch referents the commit 374cef3 to add static-pie support. And
> because the dummy link map is used when relocating ourselves, so need
> not to set __global_pointer$ at this time.
To enable this support as default woudl equires GCC commit
b20e59f49b51b7baf05e1b727be5da947e617496 that pass the expected ld flags.
Otherwise, building static-pie will fail with missing _DYNAMIC:
riscv64-glibc-linux-gnu-gcc -o [...] support/test-run-command -nostdlib -nostartfiles -static -static-pie [...]
[...]libc.a(dl-reloc-static-pie.o): in function `_dl_relocate_static_pie':
[...]elf/dl-reloc-static-pie.c:48: undefined reference to `_DYNAMIC'
I think you will need to add something similar to what loongarch did on
sysdeps/loongarch/configure.ac and check whether compile do actually
supports -static-pie.
> ---
> sysdeps/riscv/configure | 1 +
> sysdeps/riscv/configure.ac | 3 +++
> sysdeps/riscv/dl-machine.h | 2 +-
> 3 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/sysdeps/riscv/configure b/sysdeps/riscv/configure
> index acd1f5e743..ecaf8e2a0b 100644
> --- a/sysdeps/riscv/configure
> +++ b/sysdeps/riscv/configure
> @@ -31,3 +31,4 @@ printf "%s\n" "$libc_cv_riscv_r_align" >&6; }
> config_vars="$config_vars
> riscv-r-align = $libc_cv_riscv_r_align"
>
> +$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
> diff --git a/sysdeps/riscv/configure.ac b/sysdeps/riscv/configure.ac
> index dbcc216689..36da2b5396 100644
> --- a/sysdeps/riscv/configure.ac
> +++ b/sysdeps/riscv/configure.ac
> @@ -16,3 +16,6 @@ EOF
> fi
> rm -rf conftest.*])
> LIBC_CONFIG_VAR([riscv-r-align], [$libc_cv_riscv_r_align])
> +
> +dnl Static PIE is supported.
> +AC_DEFINE(SUPPORT_STATIC_PIE)
> diff --git a/sysdeps/riscv/dl-machine.h b/sysdeps/riscv/dl-machine.h
> index c0c9bd93ad..ad875c0828 100644
> --- a/sysdeps/riscv/dl-machine.h
> +++ b/sysdeps/riscv/dl-machine.h
> @@ -323,7 +323,7 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
> gotplt[1] = (ElfW(Addr)) l;
> }
>
> - if (l->l_type == lt_executable)
> + if (l->l_type == lt_executable && l->l_scope != NULL)
> {
> /* The __global_pointer$ may not be defined by the linker if the
> $gp register does not be used to access the global variable
next prev parent reply other threads:[~2023-12-19 17:44 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 23:33 [PATCH] " yanzhang.wang
2023-08-11 1:57 ` Palmer Dabbelt
2023-08-13 12:20 ` Wang, Yanzhang
2023-08-15 11:46 ` Adhemerval Zanella Netto
2023-09-09 3:17 ` Wang, Yanzhang
2023-09-09 3:30 ` Palmer Dabbelt
2023-09-09 6:54 ` Wang, Yanzhang
2023-09-11 14:14 ` Palmer Dabbelt
2023-09-11 13:34 ` Darius Rad
2023-09-11 17:28 ` DJ Delorie
2023-09-11 16:17 ` Adhemerval Zanella Netto
2023-09-20 13:36 ` Palmer Dabbelt
2023-09-21 13:47 ` Wang, Yanzhang
2023-10-17 8:28 ` Wang, Yanzhang
2023-10-17 13:42 ` Adhemerval Zanella Netto
2023-10-24 5:59 ` Wang, Yanzhang
2023-10-24 11:39 ` Adhemerval Zanella Netto
2023-10-26 3:30 ` Wang, Yanzhang
2023-08-14 13:12 ` Carlos O'Donell
2023-08-15 1:48 ` Wang, Yanzhang
2023-08-15 1:44 ` [PATCH v2] " yanzhang.wang
2023-12-17 13:16 ` Wang, Yanzhang
2023-12-19 17:44 ` Adhemerval Zanella Netto [this message]
2024-01-02 11:02 ` Wang, Yanzhang
2024-01-02 10:54 ` [PATCH v3] " yanzhang.wang
2024-01-02 18:30 ` Adhemerval Zanella Netto
2024-01-17 12:23 ` Andreas Schwab
2024-01-29 12:46 ` Andreas Schwab
2024-02-01 12:39 ` Wang, Yanzhang
2024-02-01 12:53 ` Andreas Schwab
2024-05-21 11:13 ` Maciej W. Rozycki
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