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-rw-r--r--arch/xtensa/Makefile6
-rw-r--r--arch/xtensa/boot/boot-redboot/bootstrap.S1
-rw-r--r--arch/xtensa/kernel/Makefile3
-rw-r--r--arch/xtensa/kernel/align.S2
-rw-r--r--arch/xtensa/kernel/entry.S8
-rw-r--r--arch/xtensa/kernel/setup.c16
-rw-r--r--arch/xtensa/kernel/vectors.S14
-rw-r--r--arch/xtensa/kernel/vmlinux.lds.S90
8 files changed, 52 insertions, 88 deletions
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index a206598b5d95..3a934b72a272 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -42,12 +42,12 @@ export PLATFORM
# temporarily until string.h is fixed
KBUILD_CFLAGS += -ffreestanding -D__linux__
-
-KBUILD_CFLAGS += -pipe -mlongcalls
-
+KBUILD_CFLAGS += -pipe -mlongcalls -mtext-section-literals
KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,)
KBUILD_CFLAGS += $(call cc-option,-mno-serialize-volatile,)
+KBUILD_AFLAGS += -mlongcalls -mtext-section-literals
+
ifneq ($(CONFIG_LD_NO_RELAX),)
LDFLAGS := --no-relax
endif
diff --git a/arch/xtensa/boot/boot-redboot/bootstrap.S b/arch/xtensa/boot/boot-redboot/bootstrap.S
index bf7fabe6310d..bbf3b4b080cd 100644
--- a/arch/xtensa/boot/boot-redboot/bootstrap.S
+++ b/arch/xtensa/boot/boot-redboot/bootstrap.S
@@ -42,6 +42,7 @@ __start_a0:
.align 4
.section .text, "ax"
+ .literal_position
.begin literal_prefix .text
/* put literals in here! */
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index bb8d55775a97..91907590d183 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -17,9 +17,6 @@ obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o
-AFLAGS_head.o += -mtext-section-literals
-AFLAGS_mxhead.o += -mtext-section-literals
-
# In the Xtensa architecture, assembly generates literals which must always
# precede the L32R instruction with a relative offset less than 256 kB.
# Therefore, the .text and .literal section must be combined in parenthesis
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S
index 890004af03a9..24b3189d7841 100644
--- a/arch/xtensa/kernel/align.S
+++ b/arch/xtensa/kernel/align.S
@@ -155,7 +155,7 @@
* < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
*/
-
+ .literal_position
ENTRY(fast_unaligned)
/* Note: We don't expect the address to be aligned on a word
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 37a239556889..5d5707831626 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -125,6 +125,7 @@
*
* Note: _user_exception might be at an odd address. Don't use call0..call12
*/
+ .literal_position
ENTRY(user_exception)
@@ -777,6 +778,8 @@ ENDPROC(kernel_exception)
* When we get here, a0 is trashed and saved to excsave[debuglevel]
*/
+ .literal_position
+
ENTRY(debug_exception)
rsr a0, SREG_EPS + XCHAL_DEBUGLEVEL
@@ -916,6 +919,8 @@ ENDPROC(debug_exception)
unrecoverable_text:
.ascii "Unrecoverable error in exception handler\0"
+ .literal_position
+
ENTRY(unrecoverable_exception)
movi a0, 1
@@ -1117,6 +1122,8 @@ ENDPROC(fast_syscall_unrecoverable)
* j done
*/
+ .literal_position
+
#ifdef CONFIG_FAST_SYSCALL_XTENSA
#define TRY \
@@ -1887,6 +1894,7 @@ ENDPROC(fast_store_prohibited)
* void system_call (struct pt_regs* regs, int exccause)
* a2 a3
*/
+ .literal_position
ENTRY(system_call)
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 08175df7a69e..253a0178f1bd 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -277,13 +277,13 @@ extern char _end[];
extern char _stext[];
extern char _WindowVectors_text_start;
extern char _WindowVectors_text_end;
-extern char _DebugInterruptVector_literal_start;
+extern char _DebugInterruptVector_text_start;
extern char _DebugInterruptVector_text_end;
-extern char _KernelExceptionVector_literal_start;
+extern char _KernelExceptionVector_text_start;
extern char _KernelExceptionVector_text_end;
-extern char _UserExceptionVector_literal_start;
+extern char _UserExceptionVector_text_start;
extern char _UserExceptionVector_text_end;
-extern char _DoubleExceptionVector_literal_start;
+extern char _DoubleExceptionVector_text_start;
extern char _DoubleExceptionVector_text_end;
#if XCHAL_EXCM_LEVEL >= 2
extern char _Level2InterruptVector_text_start;
@@ -339,16 +339,16 @@ void __init setup_arch(char **cmdline_p)
mem_reserve(__pa(&_WindowVectors_text_start),
__pa(&_WindowVectors_text_end));
- mem_reserve(__pa(&_DebugInterruptVector_literal_start),
+ mem_reserve(__pa(&_DebugInterruptVector_text_start),
__pa(&_DebugInterruptVector_text_end));
- mem_reserve(__pa(&_KernelExceptionVector_literal_start),
+ mem_reserve(__pa(&_KernelExceptionVector_text_start),
__pa(&_KernelExceptionVector_text_end));
- mem_reserve(__pa(&_UserExceptionVector_literal_start),
+ mem_reserve(__pa(&_UserExceptionVector_text_start),
__pa(&_UserExceptionVector_text_end));
- mem_reserve(__pa(&_DoubleExceptionVector_literal_start),
+ mem_reserve(__pa(&_DoubleExceptionVector_text_start),
__pa(&_DoubleExceptionVector_text_end));
#if XCHAL_EXCM_LEVEL >= 2
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S
index 332e9d635fb6..2bc85051c680 100644
--- a/arch/xtensa/kernel/vectors.S
+++ b/arch/xtensa/kernel/vectors.S
@@ -205,9 +205,6 @@ ENDPROC(_KernelExceptionVector)
*/
.section .DoubleExceptionVector.text, "ax"
- .begin literal_prefix .DoubleExceptionVector
- .globl _DoubleExceptionVector_WindowUnderflow
- .globl _DoubleExceptionVector_WindowOverflow
ENTRY(_DoubleExceptionVector)
@@ -217,8 +214,12 @@ ENTRY(_DoubleExceptionVector)
/* Check for kernel double exception (usually fatal). */
rsr a2, ps
- _bbci.l a2, PS_UM_BIT, .Lksp
+ _bbsi.l a2, PS_UM_BIT, 1f
+ j .Lksp
+ .align 4
+ .literal_position
+1:
/* Check if we are currently handling a window exception. */
/* Note: We don't need to indicate that we enter a critical section. */
@@ -475,11 +476,8 @@ _DoubleExceptionVector_handle_exception:
rotw -3
j 1b
-
ENDPROC(_DoubleExceptionVector)
- .end literal_prefix
-
.text
/*
* Fixup handler for TLB miss in double exception handler for window owerflow.
@@ -508,6 +506,8 @@ ENDPROC(_DoubleExceptionVector)
* a3: exctable, original value in excsave1
*/
+ .literal_position
+
ENTRY(window_overflow_restore_a0_fixup)
rsr a0, ps
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 162c77e53ca8..70b731edc7b8 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -45,24 +45,16 @@ jiffies = jiffies_64;
LONG(sym ## _end); \
LONG(LOADADDR(section))
-/* Macro to define a section for a vector.
- *
- * Use of the MIN function catches the types of errors illustrated in
- * the following example:
- *
- * Assume the section .DoubleExceptionVector.literal is completely
- * full. Then a programmer adds code to .DoubleExceptionVector.text
- * that produces another literal. The final literal position will
- * overlay onto the first word of the adjacent code section
- * .DoubleExceptionVector.text. (In practice, the literals will
- * overwrite the code, and the first few instructions will be
- * garbage.)
+/*
+ * Macro to define a section for a vector. When CONFIG_VECTORS_OFFSET is
+ * defined code for every vector is located with other init data. At startup
+ * time head.S copies code for every vector to its final position according
+ * to description recorded in the corresponding RELOCATE_ENTRY.
*/
#ifdef CONFIG_VECTORS_OFFSET
-#define SECTION_VECTOR(sym, section, addr, max_prevsec_size, prevsec) \
- section addr : AT((MIN(LOADADDR(prevsec) + max_prevsec_size, \
- LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3) \
+#define SECTION_VECTOR(sym, section, addr, prevsec) \
+ section addr : AT(((LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3) \
{ \
. = ALIGN(4); \
sym ## _start = ABSOLUTE(.); \
@@ -112,26 +104,19 @@ SECTIONS
#if XCHAL_EXCM_LEVEL >= 6
SECTION_VECTOR (.Level6InterruptVector.text, INTLEVEL6_VECTOR_VADDR)
#endif
- SECTION_VECTOR (.DebugInterruptVector.literal, DEBUG_VECTOR_VADDR - 4)
SECTION_VECTOR (.DebugInterruptVector.text, DEBUG_VECTOR_VADDR)
- SECTION_VECTOR (.KernelExceptionVector.literal, KERNEL_VECTOR_VADDR - 4)
SECTION_VECTOR (.KernelExceptionVector.text, KERNEL_VECTOR_VADDR)
- SECTION_VECTOR (.UserExceptionVector.literal, USER_VECTOR_VADDR - 4)
SECTION_VECTOR (.UserExceptionVector.text, USER_VECTOR_VADDR)
- SECTION_VECTOR (.DoubleExceptionVector.literal, DOUBLEEXC_VECTOR_VADDR - 20)
SECTION_VECTOR (.DoubleExceptionVector.text, DOUBLEEXC_VECTOR_VADDR)
#endif
+ IRQENTRY_TEXT
+ SOFTIRQENTRY_TEXT
+ ENTRY_TEXT
TEXT_TEXT
- VMLINUX_SYMBOL(__sched_text_start) = .;
- *(.sched.literal .sched.text)
- VMLINUX_SYMBOL(__sched_text_end) = .;
- VMLINUX_SYMBOL(__cpuidle_text_start) = .;
- *(.cpuidle.literal .cpuidle.text)
- VMLINUX_SYMBOL(__cpuidle_text_end) = .;
- VMLINUX_SYMBOL(__lock_text_start) = .;
- *(.spinlock.literal .spinlock.text)
- VMLINUX_SYMBOL(__lock_text_end) = .;
+ SCHED_TEXT
+ CPUIDLE_TEXT
+ LOCK_TEXT
}
_etext = .;
@@ -196,8 +181,6 @@ SECTIONS
.KernelExceptionVector.text);
RELOCATE_ENTRY(_UserExceptionVector_text,
.UserExceptionVector.text);
- RELOCATE_ENTRY(_DoubleExceptionVector_literal,
- .DoubleExceptionVector.literal);
RELOCATE_ENTRY(_DoubleExceptionVector_text,
.DoubleExceptionVector.text);
RELOCATE_ENTRY(_DebugInterruptVector_text,
@@ -230,25 +213,19 @@ SECTIONS
SECTION_VECTOR (_WindowVectors_text,
.WindowVectors.text,
- WINDOW_VECTORS_VADDR, 4,
+ WINDOW_VECTORS_VADDR,
.dummy)
- SECTION_VECTOR (_DebugInterruptVector_literal,
- .DebugInterruptVector.literal,
- DEBUG_VECTOR_VADDR - 4,
- SIZEOF(.WindowVectors.text),
- .WindowVectors.text)
SECTION_VECTOR (_DebugInterruptVector_text,
.DebugInterruptVector.text,
DEBUG_VECTOR_VADDR,
- 4,
- .DebugInterruptVector.literal)
+ .WindowVectors.text)
#undef LAST
#define LAST .DebugInterruptVector.text
#if XCHAL_EXCM_LEVEL >= 2
SECTION_VECTOR (_Level2InterruptVector_text,
.Level2InterruptVector.text,
INTLEVEL2_VECTOR_VADDR,
- SIZEOF(LAST), LAST)
+ LAST)
# undef LAST
# define LAST .Level2InterruptVector.text
#endif
@@ -256,7 +233,7 @@ SECTIONS
SECTION_VECTOR (_Level3InterruptVector_text,
.Level3InterruptVector.text,
INTLEVEL3_VECTOR_VADDR,
- SIZEOF(LAST), LAST)
+ LAST)
# undef LAST
# define LAST .Level3InterruptVector.text
#endif
@@ -264,7 +241,7 @@ SECTIONS
SECTION_VECTOR (_Level4InterruptVector_text,
.Level4InterruptVector.text,
INTLEVEL4_VECTOR_VADDR,
- SIZEOF(LAST), LAST)
+ LAST)
# undef LAST
# define LAST .Level4InterruptVector.text
#endif
@@ -272,7 +249,7 @@ SECTIONS
SECTION_VECTOR (_Level5InterruptVector_text,
.Level5InterruptVector.text,
INTLEVEL5_VECTOR_VADDR,
- SIZEOF(LAST), LAST)
+ LAST)
# undef LAST
# define LAST .Level5InterruptVector.text
#endif
@@ -280,40 +257,23 @@ SECTIONS
SECTION_VECTOR (_Level6InterruptVector_text,
.Level6InterruptVector.text,
INTLEVEL6_VECTOR_VADDR,
- SIZEOF(LAST), LAST)
+ LAST)
# undef LAST
# define LAST .Level6InterruptVector.text
#endif
- SECTION_VECTOR (_KernelExceptionVector_literal,
- .KernelExceptionVector.literal,
- KERNEL_VECTOR_VADDR - 4,
- SIZEOF(LAST), LAST)
-#undef LAST
SECTION_VECTOR (_KernelExceptionVector_text,
.KernelExceptionVector.text,
KERNEL_VECTOR_VADDR,
- 4,
- .KernelExceptionVector.literal)
- SECTION_VECTOR (_UserExceptionVector_literal,
- .UserExceptionVector.literal,
- USER_VECTOR_VADDR - 4,
- SIZEOF(.KernelExceptionVector.text),
- .KernelExceptionVector.text)
+ LAST)
+#undef LAST
SECTION_VECTOR (_UserExceptionVector_text,
.UserExceptionVector.text,
USER_VECTOR_VADDR,
- 4,
- .UserExceptionVector.literal)
- SECTION_VECTOR (_DoubleExceptionVector_literal,
- .DoubleExceptionVector.literal,
- DOUBLEEXC_VECTOR_VADDR - 20,
- SIZEOF(.UserExceptionVector.text),
- .UserExceptionVector.text)
+ .KernelExceptionVector.text)
SECTION_VECTOR (_DoubleExceptionVector_text,
.DoubleExceptionVector.text,
DOUBLEEXC_VECTOR_VADDR,
- 20,
- .DoubleExceptionVector.literal)
+ .UserExceptionVector.text)
. = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3;
@@ -323,7 +283,6 @@ SECTIONS
SECTION_VECTOR (_SecondaryResetVector_text,
.SecondaryResetVector.text,
RESET_VECTOR1_VADDR,
- SIZEOF(.DoubleExceptionVector.text),
.DoubleExceptionVector.text)
. = LOADADDR(.SecondaryResetVector.text)+SIZEOF(.SecondaryResetVector.text);
@@ -373,5 +332,4 @@ SECTIONS
/* Sections to be discarded */
DISCARDS
- /DISCARD/ : { *(.exit.literal) }
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.