c - Force minimum size of linker script section -


i have set of linker script sections interrupt vector table. sections located in ram , loaded ram code. each vector must @ absolute location, there separate section (and separate memory region) each vector.

some vectors may not used application, whilst others will. ensure copy code still works need make sure that, if vector not present, equivalent space in rom (two bytes) filled. tried advancing location pointer of course affects vma , doesn't me @ all.

how can ensure section takes required amount of space in rom? i.e. how can move lma on if there no data in section?

any hints or tips appreciated.

i have abridged current linker script below:

output_arch(msp430) entry(_start)  memory {   rom (rx)         : origin = 0x9c02, length = 0x61fe   vect1            : origin = 0x5b80, length = 0x0002   vect2            : origin = 0x5b82, length = 0x0002   ...   vect63           : origin = 0x5bfc, length = 0x0002 }  sections {   __interrupt_vector_1 :    {      __vectable_load__ = loadaddr(__interrupt_vector_1);     __vectable_start__ = .;     __interrupt_vector_1__ = .;     keep (*(__interrupt_vector_1))     . = __interrupt_vector_1__ + 2;   } > vect1 at> rom   __interrupt_vector_2 :    {      __interrupt_vector_2__ = .;     keep (*(__interrupt_vector_2))      . = __interrupt_vector_2__ + 2;   } > vect2 at> rom    ...    {      __interrupt_vector_63__ = .;     keep (*(__interrupt_vector_63))     keep (*(__interrupt_vector_sysnmi))     . = __interrupt_vector_63__ + 2;     __vectable_end__ = .;   } > vect63 at> rom }

i have created work around. in retrospect it's obvious, in case helps else, describe here.

my location pointer advancement doesn't because if there no data in input section linker discards output section. means no data added rom. need there padding added rom because need vector table same size. worked around using location pointer advancement putting of interrupt vectors single section:

output_arch(msp430) entry(_start)  memory {   rom (rx)         : origin = 0x9c02, length = 0x61fe   vectable         : origin = 0x5b80, length = 0x007e }  sections {   .vector_table :   {     __vectable_load__ = loadaddr(.vector_table);     __vectable_start__ = .;     __interrupt_vector_1__ = .;     keep (*(__interrupt_vector_1))     . = __interrupt_vector_1__ + 2;     __interrupt_vector_2__ = .;     keep (*(__interrupt_vector_2))      . = __interrupt_vector_2__ + 2;     ...     __interrupt_vector_63__ = .;     keep (*(__interrupt_vector_63))     keep (*(__interrupt_vector_sysnmi))     . = __interrupt_vector_63__ + 2;     __vectable_end__ = .;   } > vectable at> rom }

now necessary padding added both ram , rom provided vector table not empty. if doesn't bother me, doesn't copied, main thing vectors don't end in wrong places.


-

Comments

Post a Comment

Popular posts from this blog

java - Jasper subreport showing only one entry from the JSON data source when embedded in the Title band -

Image
i having issues populating data in subreport in title band of main report. data populated correctly in subreport in detail band of main report. trying find wrong in json query. appreciated. json sample data source (expenses.json) { "expenses": { "date": "8 sep 2016", "accounts": [ { "title": "xyz corp (111)", "accountname": "xyz corp", "accountnumber": "111", "transactions": [ { "date": "21 jun 2016", "name": "gas", "price": "17.50" }, { "date": "12 may 2016", "name": "shopping", "price": "111.99" }, { "date": "30 apr 2016", "name...
Read more

serialization - Convert Any type in scala to Array[Byte] and back -

i have following question: i have variable value in program declared value. i want convert value byte array.. how can serialize byte array , back? found examples related other types such double or int, not any. this should need. it's pretty similar how 1 in java. import java.io.{bytearrayinputstream, bytearrayoutputstream, objectinputstream, objectoutputstream} object serialization extends app { def serialise(value: any): array[byte] = { val stream: bytearrayoutputstream = new bytearrayoutputstream() val oos = new objectoutputstream(stream) oos.writeobject(value) oos.close stream.tobytearray } def deserialise(bytes: array[byte]): = { val ois = new objectinputstream(new bytearrayinputstream(bytes)) val value = ois.readobject ois.close value } println(deserialise(serialise("my test"))) println(deserialise(serialise(list(1)))) println(deserialise(serialise(map(1 -> 2)))) println(deserialise(seri...
Read more

SonarQube Plugin for Jenkins does not find SonarQube Scanner executable -

Image
i trying run sonarqube scanner within jenkins post-build step. however, keep getting error message below: ------------------------------------------------------------------------ sonar analysis failed ------------------------------------------------------------------------ fatal: sonarqube scanner executable not found sonarqube build step 'execute sonarqube scanner' marked build failure from similar questions on stackoverflow read 1 should choose "install automatically" sonarqube scanner, have done. my configurations follows: sonarqube 6.0 jenkins 1.609.3 sonarqube plugin 2.4.4 sonarqube servers sonarqube scanner build-step when config sonarqube scanner in manage jenkins --> global tool configuration --> sonarqube scanner, besides select "install automatically", need add installer. see screenshot here: sonarqube scanner --> add installer
Read more