[U-Boot] using objdump/readelf/nm to dump symbols by individual source file?
i'm doing this in the context of building for ARM with a linaro toolchain, but i'm sure it's equally valid in the context of a native build.
i'm trying to generate the same output as u-boot.map, but more condensed and with each symbol associated with its original source file (if that's even possible).
for example, there are a couple weak symbols in board_f.c:
__weak int arch_cpu_init(void) { return 0; }
__weak int mach_cpu_init(void) { return 0; }
so depending on the target board, the final included version of such a routine might come from board_f.c, or it might be overridden at the board level.
you can sort of see this in u-boot.map:
.text.arch_cpu_init 0x0000000000000000 0x8 common/built-in.o
... .text.mach_cpu_init 0x0000000004011cac 0x8 common/built-in.o 0x0000000004011cac mach_cpu_init
except i was hoping to be able to list included symbols by their *original* source file, and listed one file at a time, so the output would have the format:
board_f.o mach_cpu_init ... other stuff from board_f.o
i could swear i once knew how to do this, but i've forgotten (or perhaps i'm misremembering). is there some variation of objdump, readelf or nm that will do what i want? i need nothing other than, for each source file, the symbols that were included in the final ELF file from that source file.
can i do this?
rday
On Mon, Apr 8, 2019 at 4:29 AM Robert P. J. Day rpjday@crashcourse.ca wrote:
i'm doing this in the context of building for ARM with a linaro toolchain, but i'm sure it's equally valid in the context of a native build.
i'm trying to generate the same output as u-boot.map, but more condensed and with each symbol associated with its original source file (if that's even possible).
for example, there are a couple weak symbols in board_f.c:
__weak int arch_cpu_init(void) { return 0; }
__weak int mach_cpu_init(void) { return 0; }
so depending on the target board, the final included version of such a routine might come from board_f.c, or it might be overridden at the board level.
you can sort of see this in u-boot.map:
.text.arch_cpu_init 0x0000000000000000 0x8 common/built-in.o
... .text.mach_cpu_init 0x0000000004011cac 0x8 common/built-in.o 0x0000000004011cac mach_cpu_init
except i was hoping to be able to list included symbols by their *original* source file, and listed one file at a time, so the output would have the format:
board_f.o mach_cpu_init ... other stuff from board_f.o
i could swear i once knew how to do this, but i've forgotten (or perhaps i'm misremembering). is there some variation of objdump, readelf or nm that will do what i want? i need nothing other than, for each source file, the symbols that were included in the final ELF file from that source file.
can i do this?
nm -l u-boot seems to give me what you're asking for
$ nm -l u-boot 0089b8d8 b a_b /home/chrisp/src/u-boot/cmd/load.c:573 0089f62c b act.10860 00857780 t add_ino /home/chrisp/src/u-boot/fs/ubifs/recovery.c:1261 00828b34 T add_mtd_device /home/chrisp/src/u-boot/drivers/mtd/mtdcore.c:410 00829f7c T add_mtd_partitions /home/chrisp/src/u-boot/drivers/mtd/mtdpart.c:865 00835b2c t add_to_list 0085188c t adjust_lpt_heap.isra.1 /home/chrisp/src/u-boot/fs/ubifs/lprops.c:635 0086b110 T adler32 008775e0 T __aeabi_idiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:251 008776c4 T __aeabi_idivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:340 00877544 T __aeabi_uidiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:199 008776ac T __aeabi_uidivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:324 008776ec T __aeabi_uldivmod /home/chrisp/src/u-boot/arch/arm/lib/uldivmod.S:38 00820fd4 t alloc_priv 0081ac20 t alloc_simple /home/chrisp/src/u-boot/common/malloc_simple.c:17
On Mon, Apr 8, 2019 at 7:45 PM Chris Packham judge.packham@gmail.com wrote:
On Mon, Apr 8, 2019 at 4:29 AM Robert P. J. Day rpjday@crashcourse.ca wrote:
i'm doing this in the context of building for ARM with a linaro toolchain, but i'm sure it's equally valid in the context of a native build.
i'm trying to generate the same output as u-boot.map, but more condensed and with each symbol associated with its original source file (if that's even possible).
for example, there are a couple weak symbols in board_f.c:
__weak int arch_cpu_init(void) { return 0; }
__weak int mach_cpu_init(void) { return 0; }
so depending on the target board, the final included version of such a routine might come from board_f.c, or it might be overridden at the board level.
you can sort of see this in u-boot.map:
.text.arch_cpu_init 0x0000000000000000 0x8 common/built-in.o
... .text.mach_cpu_init 0x0000000004011cac 0x8 common/built-in.o 0x0000000004011cac mach_cpu_init
except i was hoping to be able to list included symbols by their *original* source file, and listed one file at a time, so the output would have the format:
board_f.o mach_cpu_init ... other stuff from board_f.o
i could swear i once knew how to do this, but i've forgotten (or perhaps i'm misremembering). is there some variation of objdump, readelf or nm that will do what i want? i need nothing other than, for each source file, the symbols that were included in the final ELF file from that source file.
can i do this?
nm -l u-boot seems to give me what you're asking for
$ nm -l u-boot 0089b8d8 b a_b /home/chrisp/src/u-boot/cmd/load.c:573 0089f62c b act.10860 00857780 t add_ino /home/chrisp/src/u-boot/fs/ubifs/recovery.c:1261 00828b34 T add_mtd_device /home/chrisp/src/u-boot/drivers/mtd/mtdcore.c:410 00829f7c T add_mtd_partitions /home/chrisp/src/u-boot/drivers/mtd/mtdpart.c:865 00835b2c t add_to_list 0085188c t adjust_lpt_heap.isra.1 /home/chrisp/src/u-boot/fs/ubifs/lprops.c:635 0086b110 T adler32 008775e0 T __aeabi_idiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:251 008776c4 T __aeabi_idivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:340 00877544 T __aeabi_uidiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:199 008776ac T __aeabi_uidivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:324 008776ec T __aeabi_uldivmod /home/chrisp/src/u-boot/arch/arm/lib/uldivmod.S:38 00820fd4 t alloc_priv 0081ac20 t alloc_simple /home/chrisp/src/u-boot/common/malloc_simple.c:17
Just re-read your question. You might need to do some post processing to group by the source file.
On Mon, 8 Apr 2019, Chris Packham wrote:
On Mon, Apr 8, 2019 at 7:45 PM Chris Packham judge.packham@gmail.com wrote:
On Mon, Apr 8, 2019 at 4:29 AM Robert P. J. Day rpjday@crashcourse.ca wrote:
i'm doing this in the context of building for ARM with a linaro toolchain, but i'm sure it's equally valid in the context of a native build.
i'm trying to generate the same output as u-boot.map, but more condensed and with each symbol associated with its original source file (if that's even possible).
for example, there are a couple weak symbols in board_f.c:
__weak int arch_cpu_init(void) { return 0; }
__weak int mach_cpu_init(void) { return 0; }
so depending on the target board, the final included version of such a routine might come from board_f.c, or it might be overridden at the board level.
you can sort of see this in u-boot.map:
.text.arch_cpu_init 0x0000000000000000 0x8 common/built-in.o
... .text.mach_cpu_init 0x0000000004011cac 0x8 common/built-in.o 0x0000000004011cac mach_cpu_init
except i was hoping to be able to list included symbols by their *original* source file, and listed one file at a time, so the output would have the format:
board_f.o mach_cpu_init ... other stuff from board_f.o
i could swear i once knew how to do this, but i've forgotten (or perhaps i'm misremembering). is there some variation of objdump, readelf or nm that will do what i want? i need nothing other than, for each source file, the symbols that were included in the final ELF file from that source file.
can i do this?
nm -l u-boot seems to give me what you're asking for
$ nm -l u-boot 0089b8d8 b a_b /home/chrisp/src/u-boot/cmd/load.c:573 0089f62c b act.10860 00857780 t add_ino /home/chrisp/src/u-boot/fs/ubifs/recovery.c:1261 00828b34 T add_mtd_device /home/chrisp/src/u-boot/drivers/mtd/mtdcore.c:410 00829f7c T add_mtd_partitions /home/chrisp/src/u-boot/drivers/mtd/mtdpart.c:865 00835b2c t add_to_list 0085188c t adjust_lpt_heap.isra.1 /home/chrisp/src/u-boot/fs/ubifs/lprops.c:635 0086b110 T adler32 008775e0 T __aeabi_idiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:251 008776c4 T __aeabi_idivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:340 00877544 T __aeabi_uidiv /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:199 008776ac T __aeabi_uidivmod /home/chrisp/src/u-boot/arch/arm/lib/lib1funcs.S:324 008776ec T __aeabi_uldivmod /home/chrisp/src/u-boot/arch/arm/lib/uldivmod.S:38 00820fd4 t alloc_priv 0081ac20 t alloc_simple /home/chrisp/src/u-boot/common/malloc_simple.c:17
Just re-read your question. You might need to do some post processing to group by the source file.
yes, that's the info i'm after, i could swear i once identified a command that would give it to me in the format i was suggesting. or perhaps i'm misremembering. thanks.
rday
participants (2)
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Chris Packham -
Robert P. J. Day