exitcall: Add exitcall infrastructure

exitcall infrastructure is based on initcall infrastructure.
It allows to have and use exit call hooks on barebox shutdown.

Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

11 files changed, 51 insertions, 1 deletions

diff --git a/arch/arm/lib/barebox.lds.S b/arch/arm/lib/barebox.lds.S
index bb0354ae29..5344557860 100644
--- a/arch/arm/lib/barebox.lds.S
+++ b/arch/arm/lib/barebox.lds.S
@@ -90,6 +90,10 @@ SECTIONS
 	.barebox_initcalls : { INITCALLS }
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	.barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
 	__usymtab_start = .;
 	__usymtab : { BAREBOX_SYMS }
 	__usymtab_end = .;
diff --git a/arch/blackfin/boards/ipe337/barebox.lds.S b/arch/blackfin/boards/ipe337/barebox.lds.S
index 9bb7cc4953..51a586af27 100644
--- a/arch/blackfin/boards/ipe337/barebox.lds.S
+++ b/arch/blackfin/boards/ipe337/barebox.lds.S
@@ -76,6 +76,10 @@ SECTIONS
 	.barebox_initcalls : { INITCALLS }
 	___barebox_initcalls_end = .;
 
+	___barebox_exitcalls_start = .;
+	.barebox_exitcalls : { EXITCALLS }
+	___barebox_exitcalls_end = .;
+
 	___usymtab_start = .;
 	__usymtab : { BAREBOX_SYMS }
 	___usymtab_end = .;
diff --git a/arch/efi/lib/elf_ia32_efi.lds.S b/arch/efi/lib/elf_ia32_efi.lds.S
index a5f6287500..69f43f5547 100644
--- a/arch/efi/lib/elf_ia32_efi.lds.S
+++ b/arch/efi/lib/elf_ia32_efi.lds.S
@@ -56,6 +56,10 @@ SECTIONS
 	__barebox_initcalls : { INITCALLS }
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	__barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
 	. = ALIGN(64);
 	__barebox_magicvar_start = .;
 	.barebox_magicvar : { BAREBOX_MAGICVARS }
diff --git a/arch/efi/lib/elf_x86_64_efi.lds.S b/arch/efi/lib/elf_x86_64_efi.lds.S
index d48432d21b..9aa4e8d829 100644
--- a/arch/efi/lib/elf_x86_64_efi.lds.S
+++ b/arch/efi/lib/elf_x86_64_efi.lds.S
@@ -58,6 +58,10 @@ SECTIONS
 	__barebox_initcalls : { INITCALLS }
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	__barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
 	. = ALIGN(64);
 	__barebox_magicvar_start = .;
 	.barebox_magicvar : { BAREBOX_MAGICVARS }
diff --git a/arch/mips/lib/barebox.lds.S b/arch/mips/lib/barebox.lds.S
index c690e71976..8057634ddb 100644
--- a/arch/mips/lib/barebox.lds.S
+++ b/arch/mips/lib/barebox.lds.S
@@ -67,6 +67,10 @@ SECTIONS
 	.barebox_initcalls : { INITCALLS }
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	.barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
 	__usymtab_start = .;
 	__usymtab : { BAREBOX_SYMS }
 	__usymtab_end = .;
diff --git a/arch/nios2/cpu/barebox.lds.S b/arch/nios2/cpu/barebox.lds.S
index 943c507531..a2d7fa8cdf 100644
--- a/arch/nios2/cpu/barebox.lds.S
+++ b/arch/nios2/cpu/barebox.lds.S
@@ -63,6 +63,10 @@ SECTIONS
 	.barebox_initcalls : { INITCALLS }
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	.barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
 	___usymtab_start = .;
 	__usymtab : { BAREBOX_SYMS }
 	___usymtab_end = .;
diff --git a/arch/openrisc/cpu/barebox.lds.S b/arch/openrisc/cpu/barebox.lds.S
index 9c353f30f1..b819ca0996 100644
--- a/arch/openrisc/cpu/barebox.lds.S
+++ b/arch/openrisc/cpu/barebox.lds.S
@@ -65,6 +65,10 @@ SECTIONS
 	.barebox_initcalls : { INITCALLS } > ram
 	__barebox_initcalls_end = .;
 
+	__barebox_exitcalls_start = .;
+	.barebox_exitcalls : { EXITCALLS } > ram
+	__barebox_exitcalls_end = .;
+
 	___usymtab_start = .;
 	__usymtab : { BAREBOX_SYMS } > ram
 	___usymtab_end = .;
diff --git a/arch/ppc/boards/pcm030/barebox.lds.S b/arch/ppc/boards/pcm030/barebox.lds.S
index 1332ad1cbd..0e08e053f7 100644
--- a/arch/ppc/boards/pcm030/barebox.lds.S
+++ b/arch/ppc/boards/pcm030/barebox.lds.S
@@ -112,6 +112,11 @@ SECTIONS
   __barebox_initcalls_end = .;
   __initcall_entries = (__barebox_initcalls_end - __barebox_initcalls_start) >> 2;
 
+  __barebox_exitcalls_start = .;
+  .barebox_exitcalls : { EXITCALLS }
+  __barebox_exitcalls_end = .;
+  __exitcall_entries = (__barebox_exitcalls_end - __barebox_exitcalls_start) >> 2;
+
   __usymtab_start = .;
   __usymtab : { BAREBOX_SYMS }
   __usymtab_end = .;
diff --git a/arch/ppc/mach-mpc85xx/barebox.lds.S b/arch/ppc/mach-mpc85xx/barebox.lds.S
index 87ab7acfe2..1f7f52c39c 100644
--- a/arch/ppc/mach-mpc85xx/barebox.lds.S
+++ b/arch/ppc/mach-mpc85xx/barebox.lds.S
@@ -109,6 +109,11 @@ SECTIONS
   __barebox_initcalls_end = .;
   __initcall_entries = (__barebox_initcalls_end - __barebox_initcalls_start)>>2;
 
+  __barebox_exitcalls_start = .;
+  .barebox_exitcalls : { EXITCALLS }
+  __barebox_exitcalls_end = .;
+  __exitcall_entries = (__barebox_exitcalls_end - __barebox_exitcalls_start) >> 2;
+
   __usymtab_start = .;
   __usymtab : { BAREBOX_SYMS }
   __usymtab_end = .;
diff --git a/arch/sandbox/board/barebox.lds.S b/arch/sandbox/board/barebox.lds.S
index db5b7deb23..0d67ab6607 100644
--- a/arch/sandbox/board/barebox.lds.S
+++ b/arch/sandbox/board/barebox.lds.S
@@ -8,6 +8,11 @@ SECTIONS
 	__barebox_initcalls_end = .;
 
 	. = ALIGN(64);
+	__barebox_exitcalls_start = .;
+	__barebox_exitcalls : { EXITCALLS }
+	__barebox_exitcalls_end = .;
+
+	. = ALIGN(64);
 	__barebox_magicvar_start = .;
 	.barebox_magicvar : { BAREBOX_MAGICVARS }
 	__barebox_magicvar_end = .;
diff --git a/arch/x86/lib/barebox.lds.S b/arch/x86/lib/barebox.lds.S
index 6cf6b10d1b..23d7546532 100644
--- a/arch/x86/lib/barebox.lds.S
+++ b/arch/x86/lib/barebox.lds.S
@@ -185,7 +185,14 @@ SECTIONS
 		. = ALIGN(4);
 	} > barebox
 
-	.__usymtab : AT ( LOADADDR(.barebox_initcalls) + SIZEOF (.barebox_initcalls) ) {
+	.barebox_exitcalls : AT ( LOADADDR(.barebox_initcalls) + SIZEOF (.barebox_initcalls) ) {
+		__barebox_exitcalls_start = .;
+		EXITCALLS
+		__barebox_exitcalls_end = .;
+		. = ALIGN(4);
+	} > barebox
+
+	.__usymtab : AT ( LOADADDR(.barebox_exitcalls) + SIZEOF (.barebox_exitcalls) ) {
 		__usymtab_start = .;
 		BAREBOX_SYMS
 		__usymtab_end = .;