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Enable gdb-jit for PPC64 on Linux (both big-endian and little-endian).

Browse Source 
R=danno@chromium.org, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com

BUG=

Review URL: https://codereview.chromium.org/1252913007

Cr-Commit-Position: refs/heads/master@{#29984}
This commit is contained in:
dstence 2015-08-03 11:02:24 -07:00 committed by Commit bot
parent 40bb3a58a0
commit 8d2eec506f
2 changed files with 43 additions and 4 deletions
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4
build/standalone.gypi
View File

@ -179,8 +179,8 @@
}],
],
}],
['(v8_target_arch=="ia32" or v8_target_arch=="x64" or v8_target_arch=="x87") and \
(OS=="linux" or OS=="mac")', {
['((v8_target_arch=="ia32" or v8_target_arch=="x64" or v8_target_arch=="x87") and \
(OS=="linux" or OS=="mac")) or (v8_target_arch=="ppc64" and OS=="linux")', {
'v8_enable_gdbjit%': 1,
}, {
'v8_enable_gdbjit%': 0,

43
src/gdb-jit.cc
View File

@ -649,9 +649,13 @@ class ELF BASE_EMBEDDED {
(V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT))
const uint8_t ident[16] =
{ 0x7f, 'E', 'L', 'F', 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT
#elif(V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT) || \
(V8_TARGET_ARCH_PPC64 && V8_TARGET_LITTLE_ENDIAN)
const uint8_t ident[16] =
{ 0x7f, 'E', 'L', 'F', 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#elif V8_TARGET_ARCH_PPC64 && V8_TARGET_BIG_ENDIAN && V8_OS_LINUX
const uint8_t ident[16] = {0x7f, 'E', 'L', 'F', 2, 2, 1, 0,
0, 0, 0, 0, 0, 0, 0, 0};
#else
#error Unsupported target architecture.
#endif
@ -668,6 +672,14 @@ class ELF BASE_EMBEDDED {
// Set to EM_ARM, defined as 40, in "ARM ELF File Format" at
// infocenter.arm.com/help/topic/com.arm.doc.dui0101a/DUI0101A_Elf.pdf
header->machine = 40;
#elif V8_TARGET_ARCH_PPC64 && V8_OS_LINUX
// Set to EM_PPC64, defined as 21, in Power ABI,
// Join the next 4 lines, omitting the spaces and double-slashes.
// https://www-03.ibm.com/technologyconnect/tgcm/TGCMFileServlet.wss/
// ABI64BitOpenPOWERv1.1_16July2015_pub.pdf?
// id=B81AEC1A37F5DAF185257C3E004E8845&linkid=1n0000&c_t=
// c9xw7v5dzsj7gt1ifgf4cjbcnskqptmr
header->machine = 21;
#else
#error Unsupported target architecture.
#endif
@ -783,7 +795,8 @@ class ELFSymbol BASE_EMBEDDED {
uint8_t other;
uint16_t section;
};
#elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT
#elif(V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT) || \
(V8_TARGET_ARCH_PPC64 && V8_OS_LINUX)
struct SerializedLayout {
SerializedLayout(uint32_t name,
uintptr_t value,
@ -1061,6 +1074,30 @@ class DebugInfoSection : public DebugSection {
DW_OP_reg5 = 0x55,
DW_OP_reg6 = 0x56,
DW_OP_reg7 = 0x57,
DW_OP_reg8 = 0x58,
DW_OP_reg9 = 0x59,
DW_OP_reg10 = 0x5a,
DW_OP_reg11 = 0x5b,
DW_OP_reg12 = 0x5c,
DW_OP_reg13 = 0x5d,
DW_OP_reg14 = 0x5e,
DW_OP_reg15 = 0x5f,
DW_OP_reg16 = 0x60,
DW_OP_reg17 = 0x61,
DW_OP_reg18 = 0x62,
DW_OP_reg19 = 0x63,
DW_OP_reg20 = 0x64,
DW_OP_reg21 = 0x65,
DW_OP_reg22 = 0x66,
DW_OP_reg23 = 0x67,
DW_OP_reg24 = 0x68,
DW_OP_reg25 = 0x69,
DW_OP_reg26 = 0x6a,
DW_OP_reg27 = 0x6b,
DW_OP_reg28 = 0x6c,
DW_OP_reg29 = 0x6d,
DW_OP_reg30 = 0x6e,
DW_OP_reg31 = 0x6f,
DW_OP_fbreg = 0x91 // 1 param: SLEB128 offset
};
@ -1106,6 +1143,8 @@ class DebugInfoSection : public DebugSection {
UNIMPLEMENTED();
#elif V8_TARGET_ARCH_MIPS64
UNIMPLEMENTED();
#elif V8_TARGET_ARCH_PPC64 && V8_OS_LINUX
w->Write<uint8_t>(DW_OP_reg31); // The frame pointer is here on PPC64.
#else
#error Unsupported target architecture.
#endif