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| author | Igor Guryanov <guryanov@synopsys.com> | 2014-12-24 17:17:11 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2015-01-15 22:38:42 +0300 |
| commit | 20a58ac0d8e09d0bf1a74c6b68fea22784512b51 (patch) | |
| tree | df909ca56ce3685deec112fdda3e723e77c09262 /arch/arc/lib | |
| parent | dcb431e723f132d0df63fb1e711042a6bbfc3a6a (diff) | |
| download | talos-obmc-uboot-20a58ac0d8e09d0bf1a74c6b68fea22784512b51.tar.gz talos-obmc-uboot-20a58ac0d8e09d0bf1a74c6b68fea22784512b51.zip | |
arc: introduce separate section for interrupt vector table
Even though existing implementation works fine in preparation to
submission of ARCv2 architecture we need this change.
In case of ARCv2 interrupt vector table consists of just addresses
of corresponding handlers. And if those addresses will be in .text
section then assembler will encode them as everything in .text section
as middle-endian and then on real execution CPU will read swapped
addresses and will jump into the wild.
Once introduced new section is situated so .text section remains the
first which allows us to use common linker option for linking everything
to a specified CONFIG_SYS_TEXT_BASE.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Igor Guryanov <guryanov@synopsys.com>
Diffstat (limited to 'arch/arc/lib')
| -rw-r--r-- | arch/arc/lib/relocate.c | 4 | ||||
| -rw-r--r-- | arch/arc/lib/sections.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/arc/lib/relocate.c b/arch/arc/lib/relocate.c index 2482bcdffc..5618b6ae93 100644 --- a/arch/arc/lib/relocate.c +++ b/arch/arc/lib/relocate.c @@ -44,7 +44,7 @@ int do_elf_reloc_fixups(void) #ifdef __LITTLE_ENDIAN__ /* If location in ".text" section swap value */ if ((unsigned int)offset_ptr_rom < - (unsigned int)&__text_end) + (unsigned int)&__ivt_end) val = (val << 16) | (val >> 16); #endif @@ -55,7 +55,7 @@ int do_elf_reloc_fixups(void) #ifdef __LITTLE_ENDIAN__ /* If location in ".text" section swap value */ if ((unsigned int)offset_ptr_rom < - (unsigned int)&__text_end) + (unsigned int)&__ivt_end) val = (val << 16) | (val >> 16); #endif memcpy(offset_ptr_ram, &val, sizeof(int)); diff --git a/arch/arc/lib/sections.c b/arch/arc/lib/sections.c index b0b46a4e9a..a72c6946d5 100644 --- a/arch/arc/lib/sections.c +++ b/arch/arc/lib/sections.c @@ -19,3 +19,5 @@ char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end"))); char __text_start[0] __attribute__((section(".__text_start"))); char __text_end[0] __attribute__((section(".__text_end"))); char __init_end[0] __attribute__((section(".__init_end"))); +char __ivt_start[0] __attribute__((section(".__ivt_start"))); +char __ivt_end[0] __attribute__((section(".__ivt_end"))); |
