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authorMax Filippov <jcmvbkbc@gmail.com>2022-09-15 12:30:54 -0700
committerWaldemar Brodkorb <wbx@openadk.org>2022-09-21 10:35:41 +0200
commit0c979facbd8b9c4af702edebec80a58fdb3b3e92 (patch)
treebaf9977cd801a4c83869ccf29c2e21f34c1d9e71
parent191c0acf07a4e25a5cdb3937632eb0f81d578965 (diff)
xtensa: add static pie supportHEADmaster
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
-rw-r--r--extra/Configs/Config.in4
-rw-r--r--ldso/ldso/xtensa/dl-startup.h2
-rw-r--r--libc/misc/internals/reloc_static_pie.c2
-rw-r--r--libc/sysdeps/linux/xtensa/crt1.S27
4 files changed, 33 insertions, 2 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 43c04fd0a..dd1beaadc 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -324,7 +324,9 @@ config DOPIC
config STATIC_PIE
bool "Add support for Static Position Independent Executables (PIE)"
default n
- depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && (TARGET_arm || TARGET_i386 || TARGET_x86_64 || TARGET_aarch64 || TARGET_mips)
+ depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && \
+ (TARGET_arm || TARGET_i386 || TARGET_x86_64 || TARGET_aarch64 || \
+ TARGET_mips || TARGET_xtensa)
config ARCH_HAS_NO_SHARED
bool
diff --git a/ldso/ldso/xtensa/dl-startup.h b/ldso/ldso/xtensa/dl-startup.h
index 439bdbd7a..c9350c0f2 100644
--- a/ldso/ldso/xtensa/dl-startup.h
+++ b/ldso/ldso/xtensa/dl-startup.h
@@ -7,6 +7,7 @@
* Parts taken from glibc/sysdeps/xtensa/dl-machine.h.
*/
+#ifndef L_rcrt1
__asm__ (
" .text\n"
" .align 4\n"
@@ -81,6 +82,7 @@ __asm__ (
" addi a5, a5, 8\n"
" bnez a6, 3b\n"
" j .Lfixup_stack_ret");
+#endif
/* Get a pointer to the argv value. */
#define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long *) ARGS) + 1)
diff --git a/libc/misc/internals/reloc_static_pie.c b/libc/misc/internals/reloc_static_pie.c
index ce42cb9b3..ab1923024 100644
--- a/libc/misc/internals/reloc_static_pie.c
+++ b/libc/misc/internals/reloc_static_pie.c
@@ -21,7 +21,7 @@
#include <dl-elf.h>
#include <ldso.h>
-#ifdef __mips__
+#if defined(__mips__) || defined(__xtensa__)
#include <dl-startup.h>
#endif
diff --git a/libc/sysdeps/linux/xtensa/crt1.S b/libc/sysdeps/linux/xtensa/crt1.S
index efbe264c0..3fa14ae58 100644
--- a/libc/sysdeps/linux/xtensa/crt1.S
+++ b/libc/sysdeps/linux/xtensa/crt1.S
@@ -76,9 +76,26 @@
.global _start
.type _start, @function
_start:
+#ifdef L_rcrt1
+ .begin no-transform
+ call0 1f
+.Lret_addr:
+ .end no-transform
+ .align 4
+1:
+#endif
#if defined(__XTENSA_WINDOWED_ABI__)
+#ifdef L_rcrt1
+ movi a6, .Lret_addr
+ sub a6, a0, a6
+ movi a0, 0
+ movi a4, reloc_static_pie
+ add a4, a4, a6
+ callx4 a4
+#else
/* Clear a0 to obviously mark the outermost frame. */
movi a0, 0
+#endif
/* Load up the user's main function. */
movi a6, main
@@ -106,8 +123,18 @@ _start:
movi a4, __uClibc_main
callx4 a4
#elif defined(__XTENSA_CALL0_ABI__)
+#ifdef L_rcrt1
+ mov a12, a2
+ movi a2, .Lret_addr
+ sub a2, a0, a2
+ movi a0, reloc_static_pie
+ add a0, a0, a2
+ callx0 a0
+ mov a7, a12
+#else
/* Setup the shared library termination function. */
mov a7, a2
+#endif
/* Load up the user's main function. */
movi a2, main