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Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/1590')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/1590 | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/1590 b/gitlab/issues_text/target_missing/host_missing/accel_missing/1590 new file mode 100644 index 000000000..7f2d881b3 --- /dev/null +++ b/gitlab/issues_text/target_missing/host_missing/accel_missing/1590 @@ -0,0 +1,121 @@ +Regression: ARMv8M secure mode debugging non-functional since ~v7.2.0 +Description of problem: +Prior to qemu commit 4a35855682cebb89f9630b07aa9fd37c4e8c733b, both semihosting printf calls and debugging via gdb work as expected. + +Builds of qemu containing commit 4a35855682cebb89f9630b07aa9fd37c4e8c733b do not produce any semihosting output and are not debuggable via gdb. +Steps to reproduce: +1. Run ``qemu-system-arm -machine mps2-an505 -nographic -semihosting -kernel build/mps2_an505_cm33_blink_demo.elf`` with qemu v7.1.0, note the "blinking" print to the console once a second. +2. Run ``qemu-system-arm -machine mps2-an505 -nographic -semihosting -kernel build/mps2_an505_cm33_blink_demo.elf`` with qemu v7.2.0, note that no messages are printed to the console. +3. Run ``qemu-system-arm -machine mps2-an505 -nographic -semihosting -kernel build/mps2_an505_cm33_blink_demo.elf -S -s`` and attach gdb with the following gdbinit file. +Additional information: +Log of successful gdb session with the attached patch on top of qemu master branch: +``` +% arm-none-eabi-gdb build/mps2_an505_cm33_blink_demo.elf +GNU gdb (Arm GNU Toolchain 12.2.MPACBTI-Rel1 (Build arm-12-mpacbti.34)) 13.1.90.20230307-git +Copyright (C) 2023 Free Software Foundation, Inc. +License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. +Type "show copying" and "show warranty" for details. +This GDB was configured as "--host=x86_64-apple-darwin19.6.0 --target=arm-none-eabi". +Type "show configuration" for configuration details. +For bug reporting instructions, please see: +<https://bugs.linaro.org/>. +Find the GDB manual and other documentation resources online at: + <http://www.gnu.org/software/gdb/documentation/>. + +For help, type "help". +Type "apropos word" to search for commands related to "word"... +Reading symbols from build/mps2_an505_cm33_blink_demo.elf... +The target architecture is set to "armv8-m.main". +Reset_Handler () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:172 +172 { +Section .privileged_functions, range 0x10000000 -- 0x10008000: matched. +Section .text, range 0x10008000 -- 0x10019c18: matched. +Section .rodata, range 0x10019c18 -- 0x1001b270: matched. +Section .ARM.exidx, range 0x1001b270 -- 0x1001b278: matched. +Section .copy.table, range 0x1001b278 -- 0x1001b284: matched. +Section .data, range 0x1001b28c -- 0x1001bb90: matched. +Section .ram_vectors, range 0x1001bb90 -- 0x1001bdd0: matched. +Section .zero.table, range 0x1001b284 -- 0x1001b28c: matched. +Breakpoint 1 at 0x10009900: file /FreeRTOS/Demo/ARM_MPS/fault_handlers.c, line 494. +(gdb) s +174 asm volatile +(gdb) s +189 init_data_sections(); +(gdb) s +init_data_sections () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:99 +99 for( pCopyTable = &__copy_table_start__; pCopyTable <= &__copy_table_end__; pCopyTable++ ) +(gdb) s +101 for( dataIndex = 0; dataIndex < pCopyTable->uxLen; dataIndex++ ) +(gdb) info locals +pCopyTable = 0x1001b278 +dataIndex = 0 +(gdb) print /x *0xE000ED08 +$1 = 0x10000000 +``` + +Log of an unsuccessful gdb session with qemu v7.2.0 +``` +pbartell@147dda7342a9 ARM_MPS % arm-none-eabi-gdb build/mps2_an505_cm33_blink_demo.elf +GNU gdb (Arm GNU Toolchain 12.2.MPACBTI-Rel1 (Build arm-12-mpacbti.34)) 13.1.90.20230307-git +Copyright (C) 2023 Free Software Foundation, Inc. +License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. +Type "show copying" and "show warranty" for details. +This GDB was configured as "--host=x86_64-apple-darwin19.6.0 --target=arm-none-eabi". +Type "show configuration" for configuration details. +For bug reporting instructions, please see: +<https://bugs.linaro.org/>. +Find the GDB manual and other documentation resources online at: + <http://www.gnu.org/software/gdb/documentation/>. + +For help, type "help". +Type "apropos word" to search for commands related to "word"... +Reading symbols from build/mps2_an505_cm33_blink_demo.elf... +The target architecture is set to "armv8-m.main". +Reset_Handler () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:172 +172 { +Section .privileged_functions, range 0x10000000 -- 0x10008000: MIS-MATCHED! +Section .text, range 0x10008000 -- 0x10019c18: MIS-MATCHED! +Section .rodata, range 0x10019c18 -- 0x1001b270: MIS-MATCHED! +Section .ARM.exidx, range 0x1001b270 -- 0x1001b278: MIS-MATCHED! +Section .copy.table, range 0x1001b278 -- 0x1001b284: MIS-MATCHED! +Section .data, range 0x1001b28c -- 0x1001bb90: MIS-MATCHED! +Section .ram_vectors, range 0x1001bb90 -- 0x1001bdd0: MIS-MATCHED! +Section .zero.table, range 0x1001b284 -- 0x1001b28c: MIS-MATCHED! +warning: One or more sections of the target image does not match +the loaded file + +Breakpoint 1 at 0x10009900: file /FreeRTOS/FreeRTOS/Demo/ARM_MPS/fault_handlers.c, line 494. +(gdb) s +Reset_Handler () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:174 +174 asm volatile +(gdb) s +Reset_Handler () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:189 +189 init_data_sections(); +(gdb) s +init_data_sections () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:95 +95 { +(gdb) s +init_data_sections () at /FreeRTOS/FreeRTOS/Demo/ARM_MPS/startup.c:99 +99 for( pCopyTable = &__copy_table_start__; pCopyTable <= &__copy_table_end__; pCopyTable++ ) +(gdb) info locals +pCopyTable = <error reading variable pCopyTable (Cannot access memory at address 0x381fffdc)> +dataIndex = <error reading variable dataIndex (Cannot access memory at address 0x381fffd8)> +(gdb) print /x *0xE000ED08 +$1 = 0x0 +(gdb) quit +``` + +.gdbinit file: +``` +set architecture armv8-m.main +target extended-remote :1234 +compare-sections +break HardFault_Handler +``` + +[mps2_an505_cm33_blink_demo.elf](/uploads/c86e086b00651a8d5392857b9e4a2c4d/mps2_an505_cm33_blink_demo.elf) +[target-arm-Fix-debugging-of-ARMv8M-Secure-code.patch](/uploads/5735d5f7d7b15dbbeb0c2d214a46c1a8/target-arm-Fix-debugging-of-ARMv8M-Secure-code.patch) |