From dda85bc274e1148a0c576a8cb085bffadd0e54ab Mon Sep 17 00:00:00 2001
From: Dimitar Dimitrov <dimitar@dinux.eu>
Date: Sun, 21 Nov 2021 15:55:53 +0200
Subject: pru: Fixup flags for .pru_irq_map section
Assign correct flags for the .pru_irq_map section, which the
PRU remoteproc host loader introduced in Linux kernel 5.10:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c75c9fdac66efd8b54773368254ef330c276171b
gcc/ChangeLog:
* config/pru/pru.c (pru_section_type_flags): New function.
(TARGET_SECTION_TYPE_FLAGS): Wire it.
gcc/testsuite/ChangeLog:
* gcc.target/pru/pru_irq_map.c: New test.
Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
---
gcc/config/pru/pru.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
(limited to 'gcc/config')
diff --git a/gcc/config/pru/pru.c b/gcc/config/pru/pru.c
index 9f264b4..01d283f 100644
--- a/gcc/config/pru/pru.c
+++ b/gcc/config/pru/pru.c
@@ -2022,6 +2022,23 @@ pru_assemble_integer (rtx x, unsigned int size, int aligned_p)
}
}
+/* Implement TARGET_SECTION_TYPE_FLAGS. */
+
+static unsigned int
+pru_section_type_flags (tree decl, const char *name, int reloc)
+{
+ unsigned int flags = default_section_type_flags (decl, name, reloc);
+
+ /* The .pru_irq_map section is not meant to be loaded into the target
+ memory. Instead its contents are read by the host remoteproc loader.
+ To prevent being marked as a loadable (allocated) section, the
+ .pru_irq_map section is intercepted and marked as a debug section. */
+ if (!strcmp (name, ".pru_irq_map"))
+ flags = SECTION_DEBUG | SECTION_RETAIN;
+
+ return flags;
+}
+
/* Implement TARGET_ASM_FILE_START. */
static void
@@ -3071,6 +3088,8 @@ pru_unwind_word_mode (void)
#define TARGET_ASM_FUNCTION_PROLOGUE pru_asm_function_prologue
#undef TARGET_ASM_INTEGER
#define TARGET_ASM_INTEGER pru_assemble_integer
+#undef TARGET_SECTION_TYPE_FLAGS
+#define TARGET_SECTION_TYPE_FLAGS pru_section_type_flags
#undef TARGET_ASM_FILE_START
#define TARGET_ASM_FILE_START pru_file_start
--
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