arm-trusted-firmware

12053 Commits

5 Branches

114 Tags

55 MiB

Tree: 5a65fcd5f9

Commit Graph

Author	SHA1	Message	Date
Soby Mathew	f1722b693d	PIE: Use PC relative adrp/adr for symbol reference This patch fixes up the AArch64 assembly code to use adrp/adr instructions instead of ldr instruction for reference to symbols. This allows these assembly sequences to be Position Independant. Note that the the reference to sizes have been replaced with calculation of size at runtime. This is because size is a constant value and does not depend on execution address and using PC relative instructions for loading them makes them relative to execution address. Also we cannot use `ldr` instruction to load size as it generates a dynamic relocation entry which must not be fixed up and it is difficult for a dynamic loader to differentiate which entries need to be skipped. Change-Id: I8bf4ed5c58a9703629e5498a27624500ef40a836 Signed-off-by: Soby Mathew <soby.mathew@arm.com>	6 years ago
Roberto Vargas	5accce5bcc	Add support for romlib in the build system Romlib is a new image that is stored in ROM and contains the code of several libraries that can be shared between different images. All the functions within in the library are accessed using a jump table which allows to update the romlib image whithout changing the binary compatibility. This jump table can be also stored in RAM and it can allow to patch a romlib with potential bugs fixes.. Change-Id: If980ccdaca24b7aaca900e32acc68baf6f94ab35 Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>	7 years ago

Author

SHA1

Message

Date

Soby Mathew

f1722b693d

PIE: Use PC relative adrp/adr for symbol reference

This patch fixes up the AArch64 assembly code to use
adrp/adr instructions instead of ldr instruction for
reference to symbols. This allows these assembly
sequences to be Position Independant. Note that the
the reference to sizes have been replaced with
calculation of size at runtime. This is because size
is a constant value and does not depend on execution
address and using PC relative instructions for loading
them makes them relative to execution address. Also
we cannot use `ldr` instruction to load size as it
generates a dynamic relocation entry which must *not*
be fixed up and it is difficult for a dynamic loader
to differentiate which entries need to be skipped.

Change-Id: I8bf4ed5c58a9703629e5498a27624500ef40a836
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

6 years ago

Roberto Vargas

5accce5bcc

Add support for romlib in the build system

Romlib is a new image that is stored in ROM and contains the code of
several libraries that can be shared between different images. All
the functions within in the library are accessed using a jump table
which allows to update the romlib image whithout changing the binary
compatibility. This jump table can be also stored in RAM and it can
allow to patch a romlib with potential bugs fixes..

Change-Id: If980ccdaca24b7aaca900e32acc68baf6f94ab35
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

7 years ago

2 Commits (5a65fcd5f9c67baa681f664e4596760ca1f2606a)