commit b7c0c381ee914e8c4cd952e101691813aff114c9
author Heinrich Schuchardt <xypron.glpk@gmx.de> Thu Apr 04 22:06:25 2019 +0200
committer Heinrich Schuchardt <xypron.glpk@gmx.de> Fri Apr 12 22:00:42 2019 +0200
tree 62cd13fbdad48dd2f8119b361664739973f37705
parent 3f2860f2df94f36024880f4069966addffcc851a

arm: print information about loaded UEFI images

If an exception occurs in a UEFI loaded image we need the start address of
the image to determine the relocation offset.

This patch adds the necessary lines after the registers in the crash dump
for armv8. A possible output would be:

UEFI image [0x00000000bffe6000:0x00000000bffe631f] pc=0x138 '/\snp.efi'

With the offset 0x138 we can now find the relevant instruction in the
disassembled 'snp.efi' binary.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

arch/arm/lib/interrupts_64.c

diff --git a/arch/arm/lib/interrupts_64.c b/arch/arm/lib/interrupts_64.c
index 458319a..0bfdb8d 100644
--- a/arch/arm/lib/interrupts_64.c
+++ b/arch/arm/lib/interrupts_64.c
@@ -25,6 +25,11 @@
 	return 0;
 }
 
+static void show_efi_loaded_images(struct pt_regs *regs)
+{
+	efi_print_image_infos((void *)regs->elr);
+}
+
 void show_regs(struct pt_regs *regs)
 {
 	int i;
@@ -49,6 +54,7 @@
 	efi_restore_gd();
 	printf("Bad mode in \"Synchronous Abort\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -60,6 +66,7 @@
 	efi_restore_gd();
 	printf("Bad mode in \"Irq\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -71,6 +78,7 @@
 	efi_restore_gd();
 	printf("Bad mode in \"Fiq\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -82,6 +90,7 @@
 	efi_restore_gd();
 	printf("Bad mode in \"Error\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -93,6 +102,7 @@
 	efi_restore_gd();
 	printf("\"Synchronous Abort\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -104,6 +114,7 @@
 	efi_restore_gd();
 	printf("\"Irq\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -115,6 +126,7 @@
 	efi_restore_gd();
 	printf("\"Fiq\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }
 
@@ -129,5 +141,6 @@
 	efi_restore_gd();
 	printf("\"Error\" handler, esr 0x%08x\n", esr);
 	show_regs(pt_regs);
+	show_efi_loaded_images(pt_regs);
 	panic("Resetting CPU ...\n");
 }