From 001d1885f0012dbedef44bd828f91ba048029261 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 8 Apr 2019 13:20:41 -0600 Subject: sandbox: Improve debugging in initcall_run_list() At present if one of the initcalls fails on sandbox the address printing is not help, e.g.: initcall sequence 0000557678967c80 failed at call 00005576709dfe1f (err=-96) This is because U-Boot gets relocated high into memory and the relocation offset (gd->reloc_off) does not work correctly for sandbox. Add support for finding the base address of the text region (at least on Linux) and use that to set the relocation offset. This makes the output better: initcall sequence 0000560775957c80 failed at call 0000000000048134 (err=-96) Then you use can use grep to see which init call failed, e.g.: $ grep 0000000000048134 u-boot.map stdio_add_devices Of course another option is to run it with a debugger such as gdb: $ gdb u-boot ... (gdb) br initcall.h:41 Breakpoint 1 at 0x4db9d: initcall.h:41. (2 locations) Note that two locations are reported, since this function is used in both board_init_f() and board_init_r(). (gdb) r Starting program: /tmp/b/sandbox/u-boot [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". U-Boot 2018.09-00264-ge0c2ba9814-dirty (Sep 22 2018 - 12:21:46 -0600) DRAM: 128 MiB MMC: Breakpoint 1, initcall_run_list (init_sequence=0x5555559619e0 ) at /scratch/sglass/cosarm/src/third_party/u-boot/files/include/initcall.h:41 41 printf("initcall sequence %p failed at call %p (err=%d)\n", (gdb) print *init_fnc_ptr $1 = (const init_fnc_t) 0x55555559c114 (gdb) Signed-off-by: Simon Glass --- include/os.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/os.h') diff --git a/include/os.h b/include/os.h index 6f33b08cf0b..7a4f78b9b1f 100644 --- a/include/os.h +++ b/include/os.h @@ -364,4 +364,15 @@ int os_write_file(const char *name, const void *buf, int size); */ int os_read_file(const char *name, void **bufp, int *sizep); +/* + * os_find_text_base() - Find the text section in this running process + * + * This tries to find the address of the text section in this running process. + * It can be useful to map the address of functions to the address listed in + * the u-boot.map file. + * + * @return address if found, else NULL + */ +void *os_find_text_base(void); + #endif -- cgit v1.2.3