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PIE: Fix reloc at the beginning of bl31 entrypoint

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The relocation fixup code must be called at the beginning of bl31
entrypoint to ensure that CPU specific reset handlers are fixed up for
relocations.

Change-Id: Icb04eacb2d4c26c26b08b768d871d2c82777babb
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
This commit is contained in:
Louis Mayencourt 2019-03-22 16:33:23 +00:00
parent cc0dcf428f
commit 330ead8065
1 changed files with 13 additions and 12 deletions
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25
bl31/aarch64/bl31_entrypoint.S
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@ -23,7 +23,6 @@
*/
func bl31_entrypoint
#if !RESET_TO_BL31
/* ---------------------------------------------------------------
* Stash the previous bootloader arguments x0 - x3 for later use.
* ---------------------------------------------------------------
@ -33,6 +32,18 @@ func bl31_entrypoint
mov x22, x2
mov x23, x3
/* --------------------------------------------------------------------
* If PIE is enabled, fixup the Global descriptor Table and dynamic
* relocations
* --------------------------------------------------------------------
*/
#if ENABLE_PIE
mov_imm x0, BL31_BASE
mov_imm x1, BL31_LIMIT
bl fixup_gdt_reloc
#endif /* ENABLE_PIE */
#if !RESET_TO_BL31
/* ---------------------------------------------------------------------
* For !RESET_TO_BL31 systems, only the primary CPU ever reaches
* bl31_entrypoint() during the cold boot flow, so the cold/warm boot
@ -50,6 +61,7 @@ func bl31_entrypoint
_init_c_runtime=1 \
_exception_vectors=runtime_exceptions
#else
/* ---------------------------------------------------------------------
* For RESET_TO_BL31 systems which have a programmable reset address,
* bl31_entrypoint() is executed only on the cold boot path so we can
@ -76,17 +88,6 @@ func bl31_entrypoint
mov x23, 0
#endif /* RESET_TO_BL31 */
/* --------------------------------------------------------------------
* If PIE is enabled, fixup the Global descriptor Table and dynamic
* relocations
* --------------------------------------------------------------------
*/
#if ENABLE_PIE
mov_imm x0, BL31_BASE
mov_imm x1, BL31_LIMIT
bl fixup_gdt_reloc
#endif /* ENABLE_PIE */
/* --------------------------------------------------------------------
* Perform BL31 setup
* --------------------------------------------------------------------