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ArmPlatformPkg/ArmPlatformStackLib: switch to ASM_FUNC() asm macro

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Annotate functions with ASM_FUNC() so that they are emitted into
separate sections.

While we're at it, replace some inefficient uses of LoadConstantToReg(),
and remove the workaround that was added to allow conditional branches
to functions with external linkage.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2016-08-10 16:55:23 +02:00
parent c17ae4cf8e
commit 926059304e
2 changed files with 12 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
ArmPlatformPkg/Library/ArmPlatformStackLib/AArch64/ArmPlatformStackLib.S
View File

@@ -12,21 +12,6 @@
//
#include <AsmMacroIoLibV8.h>
#include <Base.h>
#include <AutoGen.h>
.text
.align 3
GCC_ASM_EXPORT(ArmPlatformStackSet)
GCC_ASM_EXPORT(ArmPlatformStackSetPrimary)
GCC_ASM_EXPORT(ArmPlatformStackSetSecondary)
GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(ArmPlatformGetCorePosition)
GCC_ASM_IMPORT(ArmPlatformGetPrimaryCoreMpId)
GCC_ASM_IMPORT(gPcd_FixedAtBuild_PcdCoreCount)
//VOID
//ArmPlatformStackSet (
@@ -35,7 +20,7 @@ GCC_ASM_IMPORT(gPcd_FixedAtBuild_PcdCoreCount)
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ASM_PFX(ArmPlatformStackSet):
ASM_FUNC(ArmPlatformStackSet)
// Save parameters
mov x6, x3
mov x5, x2
@@ -59,10 +44,10 @@ ASM_PFX(ArmPlatformStackSet):
// Restore the Link register
mov x30, x7
// Should be ASM_PFX(ArmPlatformStackSetPrimary) but generate linker error 'unsupported ELF EM_AARCH64'
b.eq ArmPlatformStackSetPrimaryL
// Should be ASM_PFX(ArmPlatformStackSetSecondary) but generate linker error 'unsupported ELF EM_AARCH64'
b.ne ArmPlatformStackSetSecondaryL
b.ne 0f
b ASM_PFX(ArmPlatformStackSetPrimary)
0:b ASM_PFX(ArmPlatformStackSetSecondary)
//VOID
//ArmPlatformStackSetPrimary (
@@ -71,8 +56,7 @@ ASM_PFX(ArmPlatformStackSet):
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ArmPlatformStackSetPrimaryL:
ASM_PFX(ArmPlatformStackSetPrimary):
ASM_FUNC(ArmPlatformStackSetPrimary)
// Save the Link register
mov x4, x30
@@ -80,9 +64,7 @@ ASM_PFX(ArmPlatformStackSetPrimary):
add x0, x0, x2
// Compute SecondaryCoresCount * SecondaryCoreStackSize
LoadConstantToReg (_gPcd_FixedAtBuild_PcdCoreCount, x1)
ldr w1, [x1]
sub x1, x1, #1
MOV32 (w1, FixedPcdGet32(PcdCoreCount) - 1)
mul x3, x3, x1
// Set Primary Stack ((StackBase + PrimaryStackSize) + (SecondaryCoresCount * SecondaryCoreStackSize))
@@ -97,8 +79,7 @@ ASM_PFX(ArmPlatformStackSetPrimary):
// IN UINTN PrimaryStackSize,
// IN UINTN SecondaryStackSize
// );
ArmPlatformStackSetSecondaryL:
ASM_PFX(ArmPlatformStackSetSecondary):
ASM_FUNC(ArmPlatformStackSetSecondary)
// Save the Link register
mov x4, x30
mov sp, x0