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When using GDB for debugging, if FW_TEXT_START is not set to 0x80000000
during compilation, the following error occurs:
Reading symbols from build/platform/generic/firmware/fw_payload.elf...
Remote debugging using localhost:1234
mips_warm_boot ()
at /home/zrmin/opensbi/platform/generic/mips/mips_warm_boot.S:11
11 j _start_warm
(gdb) b _start
Breakpoint 1 at 0x0: file /home/zrmin/opensbi/firmware/fw_base.S, line 50.
(gdb) c
Continuing.
Remote connection closed
(gdb)
With FW_TEXT_START=0x80000000, debugging works correctly:
Reading symbols from build/platform/generic/firmware/fw_payload.elf...
Remote debugging using localhost:1234
0x0000000000001000 in ?? ()
(gdb) b _start
Breakpoint 1 at 0x80000000: file /home/zrmin/opensbi/firmware/fw_base.S, line 50.
(gdb) c
Continuing.
Breakpoint 1, _start () at /home/zrmin/opensbi/firmware/fw_base.S:50
50 MOV_3R s0, a0, s1, a1, s2, a2
(gdb)
This is because QEMU loads OpenSBI at address 0x80000000. When
FW_TEXT_START does not match this address, the debug symbols are
incorrectly offset, causing GDB to fail to set breakpoints properly.
Signed-off-by: Zhang RunMin <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Slightly expand the QEMU docs to explain how to build the flat Linux kernel image.
Signed-off-by: Tim Hutt <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Describe how to debug OpenSBI on QEMU with GDB.
Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Since QEMU v5.1, if there is no "-bios" option provided, the default
OpenSBI firmware will be loaded by QEMU as the BIOS automatically,
hence to load fw_payload type image, we should explicitly pass the
"-bios" option to QEMU.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The OpenSBI generic platform works perfectly fine on the QEMU virt
machine so let's remove dedicated QEMU virt machine platform from
OpenSBI.
All QEMU virt machine related documentation in OpenSBI will now
suggest using OpenSBI generic platform.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
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Remove the unnecessary blank line at the end of the doc.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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There are several places in the source tree that have:
32bit, 32 bit, 64bit, 64 bit
Fix by using the conventional names with a hyphen.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Lukas Auer <[email protected]>
Acked-by: Anup Patel <[email protected]>
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- Correct the payload address in the RV64 examples that use
fw_jump.elf.
- Change the qemu console configuration in the examples from
"-display none -serial stdio" to "-nographic". This results in
qemu handing down a CTRL-C on the emulated console to the VM
instead of terminating the qemu process.
- Provide examples for RV32.
- Various text corrections.
Signed-off-by: Karsten Merker <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
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In order to support 32-bit guests move the start address to a 4MB
allignment. As 64-bit kernels have a requirement on being 2MB alligned
let's just make this the default for both 32 and 64 bit kernels.
Signed-off-by: Alistair Francis <[email protected]>
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Signed-off-by: Atish Patra <[email protected]>
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Mostly reformating. Some minor edits.
Signed-off-by: Damien Le Moal <[email protected]>
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This patch adds documentation for qemu/virt and
qemu/sifive_u platform supports.
Signed-off-by: Anup Patel <[email protected]>
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