Improve ddb disassembly for mips (and riscv, cribbed from mips).

- use db_read_bytes to get instructions
- move the address check logic previously attached only to fetching
instructions for disassembly to db_read_bytes (and db_write_bytes)

Motivated by related x86 changes this afternoon.

Note that the address check logic is not as sophisticated as what the
x86 code does, but it's what we had before. (Except that riscv will
now also try to fetch usermode instructions instead of just failing.)

Print target addresses similar to aarch64 as "address <sym+off>"
instead of "<sym+off> [addr:address]". Uses less columns, a bit
easier on the eyes.

Add a # to a %x printf format to get some 0x hex number prefixes.

Some QED instructions are included in MIPS32 and MIPS64 instruction sets.
Update a few comments.

Fix cut'n'paste typo - OP_CVM_DMUL is dmul, not baddu.

Tidy up NOP disassembly, handle "pause" as well.

gcc/gas also emits "or ...,zero" as well as "addu/daddu ...,zero" for a
"move" pseudo instruction. Disassemble the "or" case as a "move" too.

Allow disassembly in XKSEG for LP64 kernels. Can now x/i on modules
with an N64 kernel.

For bc{0,1,2}{t,f} check for the TRUE value not the MASK value (even
though they're the same).

branches: 1.34.2;
Disassemble TEQ correctly.

XXX: May be others that use this format?

branches: 1.33.2;
add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

Print target addresses similar to aarch64 as "address <sym+off>"
instead of "<sym+off> [addr:address]". Uses less columns, a bit
easier on the eyes.

Add a # to a %x printf format to get some 0x hex number prefixes.

Some QED instructions are included in MIPS32 and MIPS64 instruction sets.
Update a few comments.

Fix cut'n'paste typo - OP_CVM_DMUL is dmul, not baddu.

Tidy up NOP disassembly, handle "pause" as well.

gcc/gas also emits "or ...,zero" as well as "addu/daddu ...,zero" for a
"move" pseudo instruction. Disassemble the "or" case as a "move" too.

Allow disassembly in XKSEG for LP64 kernels. Can now x/i on modules
with an N64 kernel.

For bc{0,1,2}{t,f} check for the TRUE value not the MASK value (even
though they're the same).

Disassemble TEQ correctly.

XXX: May be others that use this format?

branches: 1.33.2;
add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

Add a # to a %x printf format to get some 0x hex number prefixes.

Some QED instructions are included in MIPS32 and MIPS64 instruction sets.
Update a few comments.

Fix cut'n'paste typo - OP_CVM_DMUL is dmul, not baddu.

Tidy up NOP disassembly, handle "pause" as well.

gcc/gas also emits "or ...,zero" as well as "addu/daddu ...,zero" for a
"move" pseudo instruction. Disassemble the "or" case as a "move" too.

Allow disassembly in XKSEG for LP64 kernels. Can now x/i on modules
with an N64 kernel.

For bc{0,1,2}{t,f} check for the TRUE value not the MASK value (even
though they're the same).

Disassemble TEQ correctly.

XXX: May be others that use this format?

branches: 1.33.2;
add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

Some QED instructions are included in MIPS32 and MIPS64 instruction sets.
Update a few comments.

Fix cut'n'paste typo - OP_CVM_DMUL is dmul, not baddu.

Tidy up NOP disassembly, handle "pause" as well.

gcc/gas also emits "or ...,zero" as well as "addu/daddu ...,zero" for a
"move" pseudo instruction. Disassemble the "or" case as a "move" too.

Allow disassembly in XKSEG for LP64 kernels. Can now x/i on modules
with an N64 kernel.

For bc{0,1,2}{t,f} check for the TRUE value not the MASK value (even
though they're the same).

Disassemble TEQ correctly.

XXX: May be others that use this format?

branches: 1.33.2;
add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

Disassemble TEQ correctly.

XXX: May be others that use this format?

add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

add a "special3 offset" type of decode to ddb disasm so we see the
offsets properly decoded. add mips r6 "cache" insn.

avoid signed/unsigned compare and ufetch_32() for upcoming crash(8).

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.31.14;
the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

branches: 1.30.2; 1.30.4;
Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.12; 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.

the second operand to cfc1/ctc1 isn't an FPU data register
so don't make it look like one.

Decode jr.hb and ssnop and few more spec3 instructions
u_int32_t -> uint32_t

Add decoder for ehb. Fix ins/ext instruction decoding

Make db_expr_t long long when using the N32 ABI.

Fix disassembly of trap-immediate instructions

Fix J/JAL address calculation to not throw the top 32-bits.

Add a lot of missing mipsNNr2 instruction + cavium specific instructions.

branches: 1.24.30;
Change bcond/BCOND to regimm/REGIMM to better match the MIPS nomenclature.

More <machine/ include cleanup

add cop2 instructions

branches: 1.21.4; 1.21.6;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add disassemble code for DMT, DMF, MTH and MFH.

branches: 1.19.44; 1.19.62;
TRUE -> true, FALSE -> false

Fix more boolean_t -> bool lossage

Replace the Mach-derived boolean_t type with the C99 bool type. A
future commit will replace use of TRUE and FALSE with true and false.

branches: 1.16.26;
merge ktrace-lwp.

branches: 1.15.2;
adapt to DDB constification, and fix a shadow warning

Deal with extra constiness in ddb.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.11.6;
Add N32/N64 reg names.

Note that "addu $x, $y, $0" is a "move" only in 32-bit mode.

XXX: need to revisit this.

KNF, ANSIfy.
Change print_addr() to take an db_addr_t argument instead of a long.

Update the CP0 register names.
Make some tables line up nicely.
Make print_addr() static.

branches: 1.7.4; 1.7.8;
In db_disasm() use fuword() to fetch user addresses. Mainly to avoid
bad EPCs from losing the initial ddb context when panicing, but also
helps with typos.

Pull in geocast mips ddb improvements and start bringing in kgdb support.
Add ddb support for QED opcodes, fill in enough routines so "next" usually
works, kdbpoke support for any size. Add callback that ports can hook when
entering and leaving ddb. This can be used for things like turning
off watchdogs while in ddb.

Add code to ensure delay slot is printed when disassembling.

branches: 1.4.2;
Nuke register and remove trailling white space.

branches: 1.3.4;
Include <machine/db_machdep.h> instead of <mips/db_machdep.h>.

Display jump and branch target with symbols if available.
Clean up indentation - seems to have gotten messed up when the mini-debug
routine was added.

branches: 1.1.2;
DDB for mips.
Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.