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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 /libc
parent191c0acf07a4e25a5cdb3937632eb0f81d578965 (diff)
xtensa: add static pie support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'libc')
-rw-r--r--libc/misc/internals/reloc_static_pie.c2
-rw-r--r--libc/sysdeps/linux/xtensa/crt1.S27
2 files changed, 28 insertions, 1 deletions
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